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• Word Spell Check pops up hidden and "freezes" my App

  - by Refracted Paladin

  I am using Word's Spell Check in my in house WinForm app. My clients are all XP machines with Office 2007 and randomly the spell check suggestion box pops up behind the App and makes everything "appear" frozen as you cannot get at it. Suggestions? What do other people do to work around this or stop it altogether? Thanks Below is my code, for reference, though I am doubtful that this has anything to do with my code but I'll take anything. public class SpellCheckers { public string CheckSpelling(string text) { Word.Application app = new Word.Application(); object nullobj = Missing.Value; object template = Missing.Value; object newTemplate = Missing.Value; object documentType = Missing.Value; object visible = false; object optional = Missing.Value; object savechanges = false; app.ShowMe(); Word._Document doc = app.Documents.Add(ref template, ref newTemplate, ref documentType, ref visible); doc.Words.First.InsertBefore(text); Word.ProofreadingErrors errors = doc.SpellingErrors; var ecount = errors.Count; doc.CheckSpelling(ref optional, ref optional, ref optional, ref optional, ref optional, ref optional, ref optional, ref optional, ref optional, ref optional, ref optional, ref optional); object first = 0; object last = doc.Characters.Count - 1; var results = doc.Range(ref first, ref last).Text; doc.Close(ref savechanges, ref nullobj, ref nullobj); app.Quit(ref savechanges, ref nullobj, ref nullobj); Marshal.ReleaseComObject(doc); Marshal.ReleaseComObject(app); Marshal.ReleaseComObject(errors); return results; } } And I call it from my WinForm app like so -- public static void SpellCheckControl(Control control) { if (IsWord2007Available()) { if (control.HasChildren) { foreach (Control ctrl in control.Controls) { SpellCheckControl(ctrl); } } if (IsValidSpellCheckControl(control)) { if (control.Text != String.Empty) { control.BackColor = Color.FromArgb(180, 215, 195); control.Text = Spelling.CheckSpelling(control.Text); control.Text = control.Text.Replace("\r", "\r\n"); control.ResetBackColor(); } } } }

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• ruby on rails configuration

  - by Themasterhimself

  Im using the following guide for getting started with rails for ubuntu 9.10. http://guides.rails.info/getting_started.html I have installed both ruby and gem. gokul@gokul-laptop:~$ ruby -v ruby 1.8.7 (2009-06-12 patchlevel 174) [i486-linux] gokul@gokul-laptop:~$ gem -v 1.3.6 gokul@gokul-laptop:~$ For rails, gokul@gokul-laptop:~$sudo gem install rails doesnt seem to give any response. so used the synaptic package manager for installing it. And it seems to have installed correctly. gokul@gokul-laptop:~$ rails Usage: /usr/bin/rails /path/to/your/app [options] Options: -r, --ruby=path Path to the Ruby binary of your choice (otherwise scripts use env, dispatchers current path). Default: /usr/bin/ruby1.8 -d, --database=name Preconfigure for selected database (options: mysql/oracle/postgresql/sqlite2/sqlite3/frontbase/ibm_db). Default: sqlite3 -D, --with-dispatchers Add CGI/FastCGI/mod_ruby dispatches code to generated application skeleton Default: false --freeze Freeze Rails in vendor/rails from the gems generating the skeleton Default: false -m, --template=path Use an application template that lives at path (can be a filesystem path or URL). Default: (none) Rails Info: -v, --version Show the Rails version number and quit. -h, --help Show this help message and quit. General Options: -p, --pretend Run but do not make any changes. -f, --force Overwrite files that already exist. -s, --skip Skip files that already exist. -q, --quiet Suppress normal output. -t, --backtrace Debugging: show backtrace on errors. -c, --svn Modify files with subversion. (Note: svn must be in path) -g, --git Modify files with git. (Note: git must be in path) Description: The 'rails' command creates a new Rails application with a default directory structure and configuration at the path you specify. Example: rails ~/Code/Ruby/weblog This generates a skeletal Rails installation in ~/Code/Ruby/weblog. See the README in the newly created application to get going. gokul@gokul-laptop:~$ app folder is created with all the proper folders. The problem starts with the following commands... gokul@gokul-laptop:~$ sudo gem install bundler [sudo] password for gokul: Successfully installed bundler-0.9.24 1 gem installed Installing ri documentation for bundler-0.9.24... Installing RDoc documentation for bundler-0.9.24... gokul@gokul-laptop:~$ bundle install Could not locate Gemfile gokul@gokul-laptop:~$ coming to the database, the default sqlite3 seems to have installed correctly. gokul@gokul-laptop:~$ sqlite3 SQLite version 3.6.16 Enter ".help" for instructions Enter SQL statements terminated with a ";" sqlite The welcome aboard page is not being able to be found at (http://localhost:3000) after executing the following commands... gokul@gokul-laptop:~/Desktop$ rails blog create create app/controllers create app/helpers create app/models create app/views/layouts create config/environments create config/initializers create config/locales create db create doc create lib create lib/tasks create log create public/images create public/javascripts create public/stylesheets create script/performance create test/fixtures create test/functional create test/integration create test/performance create test/unit create vendor create vendor/plugins create tmp/sessions create tmp/sockets create tmp/cache create tmp/pids create Rakefile create README create app/controllers/application_controller.rb create app/helpers/application_helper.rb create config/database.yml create config/routes.rb create config/locales/en.yml create db/seeds.rb create config/initializers/backtrace_silencers.rb create config/initializers/inflections.rb create config/initializers/mime_types.rb create config/initializers/new_rails_defaults.rb create config/initializers/session_store.rb create config/environment.rb create config/boot.rb create config/environments/production.rb create config/environments/development.rb create config/environments/test.rb create script/about create script/console create script/dbconsole create script/destroy create script/generate create script/runner create script/server create script/plugin create script/performance/benchmarker create script/performance/profiler create test/test_helper.rb create test/performance/browsing_test.rb create public/404.html create public/422.html create public/500.html create public/index.html create public/favicon.ico create public/robots.txt create public/images/rails.png create public/javascripts/prototype.js create public/javascripts/effects.js create public/javascripts/dragdrop.js create public/javascripts/controls.js create public/javascripts/application.js create doc/README_FOR_APP create log/server.log create log/production.log create log/development.log create log/test.log gokul@gokul-laptop:~/Desktop$ cd blog gokul@gokul-laptop:~/Desktop/blog$ rake db:create (in /home/gokul/Desktop/blog) gokul@gokul-laptop:~/Desktop/blog$ rails server create create app/controllers create app/helpers create app/models create app/views/layouts create config/environments create config/initializers create config/locales create db create doc create lib create lib/tasks create log create public/images create public/javascripts create public/stylesheets create script/performance create test/fixtures create test/functional create test/integration create test/performance create test/unit create vendor create vendor/plugins create tmp/sessions create tmp/sockets create tmp/cache create tmp/pids create Rakefile create README create app/controllers/application_controller.rb create app/helpers/application_helper.rb create config/database.yml create config/routes.rb create config/locales/en.yml create db/seeds.rb create config/initializers/backtrace_silencers.rb create config/initializers/inflections.rb create config/initializers/mime_types.rb create config/initializers/new_rails_defaults.rb create config/initializers/session_store.rb create config/environment.rb create config/boot.rb create config/environments/production.rb create config/environments/development.rb create config/environments/test.rb create script/about create script/console create script/dbconsole create script/destroy create script/generate create script/runner create script/server create script/plugin create script/performance/benchmarker create script/performance/profiler create test/test_helper.rb create test/performance/browsing_test.rb create public/404.html create public/422.html create public/500.html create public/index.html create public/favicon.ico create public/robots.txt create public/images/rails.png create public/javascripts/prototype.js create public/javascripts/effects.js create public/javascripts/dragdrop.js create public/javascripts/controls.js create public/javascripts/application.js create doc/README_FOR_APP create log/server.log create log/production.log create log/development.log create log/test.log gokul@gokul-laptop:~/Desktop/blog$ hope some one can help me with this...

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• Detecting 'stealth' web-crawlers

  - by Jacco

  What options are there to detect web-crawlers that do not want to be detected? (I know that listing detection techniques will allow the smart stealth-crawler programmer to make a better spider, but I do not think that we will ever be able to block smart stealth-crawlers anyway, only the ones that make mistakes.) I'm not talking about the nice crawlers such as googlebot and Yahoo! Slurp. I consider a bot nice if it: identifies itself as a bot in the user agent string reads robots.txt (and obeys it) I'm talking about the bad crawlers, hiding behind common user agents, using my bandwidth and never giving me anything in return. There are some trapdoors that can be constructed updated list (thanks Chris, gs): Adding a directory only listed (marked as disallow) in the robots.txt, Adding invisible links (possibly marked as rel="nofollow"?), style="display: none;" on link or parent container placed underneath another element with higher z-index detect who doesn't understand CaPiTaLiSaTioN, detect who tries to post replies but always fail the Captcha. detect GET requests to POST-only resources detect interval between requests detect order of pages requested detect who (consistently) requests https resources over http detect who does not request image file (this in combination with a list of user-agents of known image capable browsers works surprisingly nice) Some traps would be triggered by both 'good' and 'bad' bots. you could combine those with a whitelist: It trigger a trap It request robots.txt? It doest not trigger another trap because it obeyed robots.txt One other important thing here is: Please consider blind people using a screen readers: give people a way to contact you, or solve a (non-image) Captcha to continue browsing. What methods are there to automatically detect the web crawlers trying to mask themselves as normal human visitors. Update The question is not: How do I catch every crawler. The question is: How can I maximize the chance of detecting a crawler. Some spiders are really good, and actually parse and understand html, xhtml, css javascript, VB script etc... I have no illusions: I won't be able to beat them. You would however be surprised how stupid some crawlers are. With the best example of stupidity (in my opinion) being: cast all URLs to lower case before requesting them. And then there is a whole bunch of crawlers that are just 'not good enough' to avoid the various trapdoors.

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• Databinding to ObservableCollection in a different UserControl?

  - by Dave

  Question re-written on 2010-03-24 I have two UserControls, where one is a dialog that has a TabControl, and the other is one that appears within said TabControl. I'll just call them CandyDialog and CandyNameViewer for simplicity's sake. There's also a data management class called Tracker that manages information storage, which for all intents and purposes just exposes a public property that is an ObservableCollection. I display the CandyNameViewer in CandyDialog via code behind, like this: private void CandyDialog_Loaded( object sender, RoutedEventArgs e) { _candyviewer = new CandyViewer(); _candyviewer.DataContext = _tracker; candy_tab.Content = _candyviewer; } The CandyViewer's XAML looks like this (edited for kaxaml): <Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Page.Resources> <DataTemplate x:Key="CandyItemTemplate"> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="120"></ColumnDefinition> <ColumnDefinition Width="150"></ColumnDefinition> </Grid.ColumnDefinitions> <TextBox Grid.Column="0" Text="{Binding CandyName}" Margin="3"></TextBox> <!-- just binding to DataContext ends up using InventoryItem as parent, so we need to get to the UserControl --> <ComboBox Grid.Column="1" SelectedItem="{Binding SelectedCandy, Mode=TwoWay}" ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}, Path=DataContext.CandyNames}" Margin="3"></ComboBox> </Grid> </DataTemplate> </Page.Resources> <Grid> <ListBox DockPanel.Dock="Top" ItemsSource="{Binding CandyBoxContents, Mode=TwoWay}" ItemTemplate="{StaticResource CandyItemTemplate}" /> </Grid> </Page> Now everything works fine when the controls are loaded. As long as CandyNames is populated first, and then the consumer UserControl is displayed, all of the names are there. I obviously don't get any errors in the Output Window or anything like that. The issue I have is that when the ObservableCollection is modified from the model, those changes are not reflected in the consumer UserControl! I've never had this problem before; all of my previous uses of ObservableCollection updated fine, although in those cases I wasn't databinding across assemblies. Although I am currently only adding and removing candy names to/from the ObservableCollection, at a later date I will likely also allow renaming from the model side. Is there something I did wrong? Is there a good way to actually debug this? Reed Copsey indicates here that inter-UserControl databinding is possible. Unfortunately, my favorite Bea Stollnitz article on WPF databinding debugging doesn't suggest anything that I could use for this particular problem.

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• Initializing SD card in SPI issues

  - by Sembazuru

  Sorry for the length of this question, but I thought it best to show as much detail to fend of questions asking if I had done A when I had already done A... ;-) I've had a look at the "micro-SD card initialization using SPI interface" thread and didn't see any answers that matched my issue (i.e. things I haven't already tried). I have a similar issue where I'm trying to access a SD card through a micro-controller's SPI interface (specifically an HC908). I've tried following the flow charts in the Physical Layer Simplified Specification v2.00 and it seems to initialize correctly on Transcend 1GB & 2GB and an AE&C 1GB card. But I'm having problems on 3 other random cards from my stash of old cards that I've used on my camera. My code is all HC908 assembler. I scoped out the SPI clock line and during initialization it's running about 350kHz (the only speed multiplier that the HC908 supplies at my low MCU clock speed that falls within the 100-400kHz window). Here are the results of the three cards that aren't completing my initialization routine (all done consecutively w/o changing any code or timing parameters): Canon 16Meg card (labeled as SD): Set card select high Send 80 SPI clock cycles (done by writing 0xFF 10 times) Set card select low Send CMD0 [0x400000000095] and Loop up to 8 times waiting for high bit on response to go low R1 = 0x01 (indicates idle) Send CMD8 [0x48000001AA87] and Loop up to 8 times waiting for high bit on response to go low R1 = 0x05 (idle and illegal command) Because illegal command set local flag to indicate v1 or MMC card Send CMD58 [0x7A00000000FD] and Loop up to 8 times waiting for high bit on response to go low R1 = 0x05 (idle and illegal command) because illegal command branch to error routine Send CMD13 [0x4D000000000D] (show status buffer) and Loop up to 8 times waiting for high bit on response to go low R1= 0x05 (idle and illegal command) Is the illegal command flag stuck? Should I be doing something after CMD8 to clear that flag? SanDisk UltraII 256Meg Set card select high Send 80 SPI clock cycles (done by writing 0xFF 10 times) Set card select low Send CMD0 [0x400000000095] and Loop up to 8 times waiting for high bit on response to go low R1 = 0x01 (idle) Send CMD8 [0x48000001AA87] and Loop up to 8 times waiting for high bit on response to go low R1 = 0x05 (idle and illegal command) Because illegal command set local flag to indicate v1 or MMC card Send CMD58 [0x7A00000000FD] and Loop up to 8 times waiting for high bit on response to go low R1 = 0x01 (idle) Send 0xFF 4 times to read OCR OCR = 0xFFFFFFFF Send CMD55 [0x770000000065] (1st part of ACMD41) and Loop up to 8 times waiting for high bit on response to go low R1 = 0x01 (idle) Send CMD41 [0x6900000000E5] (2nd part of ACMD41) and Loop up to 8 times waiting for high bit on response to go low R1 = 0x05 (idle and illegal command) Because illegal command, assume card is MMC Send CMD1 [0x4100000000F9] (for MMC) and Loop up to 8 times waiting for high bit on response to go low R1 = 0x05 (idle and illegal command) Repeat the CMD1 50 times (my arbitrary number to wait until idle clears) Every R1 response is 0x05 (idle and illegal command) Why is OCR all F? Doesn't seem proper at all. Also, why does ACMD41 and CMD1 respond illegal command? Is CMD1 failing because the card is waiting for a valid ACMD after the CMD55 even with the illegal command response? SanDisk ExtremeIII 2G: Set card select high Send 80 SPI clock cycles (done by writing 0xFF 10 times) Set card select low Send CMD0 [0x400000000095] and Loop up to 8 times waiting for high bit on response to go low R1 = 0x01 (idle) Send CMD8 [0x40000001AA87] and Loop up to 8 times waiting for high bit on response to go low R1 = 0x7F (??? My loop shows the responses for each iteration and I got 0xFF 0xFF 0xC1 0x7F... is the card getting out of sync?) Send CMD58 [0x7A00000000FD] and Loop up to 8 times waiting for high bit on response to go low R1 = 0x01 (idle and back in sync) Send 0xFF 4 times to read OCR OCR = 0x00FF80 Send CMD55 [0x770000000065] (1st part of ACMD41) and Loop up to 8 times waiting for high bit on response to go low R1 = 0x5F (??? loop responses are 0xFF 0xFF 0xF0 0x5F... again out of sync?) Send CMD41 [0x6900000000E5] (2nd part of ACMD41) and Loop up to 8 times waiting for high bit on response to go low R1 = 0x05 (idle and illegal command, but back in sync???) Because illegal command, assume card is MMC Send CMD1 [0x4100000000F9] (for MMC) and Loop up to 8 times waiting for high bit on response to go low R1 = 0x7F (??? loop responses are 0xFF 0xFF 0xC1 0x7F... again out of sync?) Repeat CMD1 and Loop up to 8 times waiting for high bit on response to go low R1 = 0x01 (idle) Repeat CMD1 and Loop up to 8 times waiting for high bit on response to go low R1 = 0x7F (??? loop responses are 0xFF 0xFF 0xC1 0x7F... again out of sync?) Repeat CMD1 and Loop up to 8 times waiting for high bit on response to go low R1 = 0x00 (out of idle) Send CMD9 [0x4900000000AF] (get CSD) and Loop up to 8 times waiting for high bit on response to go low R1 = 0x3F (??? loop responses are 0xFF 0xFF 0xC1 0x3F... again out of sync?) Code craps out because Illegal command bit is high. WTF is wrong with that card? Sometimes in sync, other times not. (The above pattern is repeatable.) I've scoped this one out and I'm not seeing any rogue clock cycles going through between MOSI/MISO transfers. Anyone have any clues? Need any more info? Thanx in advance for spending the time to read through all of this.

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• In apache cxf, How do i know the soap request message is gzip compressed?

  - by aspirant75

  I'm using Apache CXF to send soap message. in specific case, i have to send a soap message gzip compressed. Using log4j, i printed detailed info. would you let me know how i can know the message is gzip compressed and transfered to server. thanks in advance. Below is my java code for gzip and log info. java code Client cxfClient = ClientProxy.getClient(port); /** Logging Interceptor */ cxfClient.getInInterceptors().add(new GZIPInInterceptor()); cxfClient.getOutInterceptors().add(new GZIPOutInterceptor()); log info 20120814 18:56:15,351 DEBUG Interceptors contributed by bus: [] 20120814 18:56:15,351 DEBUG Interceptors contributed by client: [org.apache.cxf.transport.http.gzip.GZIPOutInterceptor@1682a53] 20120814 18:56:15,351 DEBUG Interceptors contributed by endpoint: [org.apache.cxf.interceptor.MessageSenderInterceptor@1b2d7df, org.apache.cxf.jaxws.interceptors.SwAOutInterceptor@7a9224, org.apache.cxf.jaxws.interceptors.WrapperClassOutInterceptor@110b640, org.apache.cxf.jaxws.interceptors.HolderOutInterceptor@2d59a3] 20120814 18:56:15,351 DEBUG Interceptors contributed by binding: [org.apache.cxf.interceptor.AttachmentOutInterceptor@158015a, org.apache.cxf.interceptor.StaxOutInterceptor@c0c8b5, org.apache.cxf.binding.soap.interceptor.SoapHeaderOutFilterInterceptor@b914b3, org.apache.cxf.interceptor.BareOutInterceptor@fdfc58, org.apache.cxf.binding.soap.interceptor.SoapPreProtocolOutInterceptor@c22a3b, org.apache.cxf.binding.soap.interceptor.SoapOutInterceptor@1629e71] 20120814 18:56:15,351 DEBUG Interceptors contributed by databinding: [] 20120814 18:56:15,357 DEBUG Adding interceptor org.apache.cxf.transport.http.gzip.GZIPOutInterceptor@1682a53 to phase prepare-send 20120814 18:56:15,358 DEBUG Adding interceptor org.apache.cxf.interceptor.MessageSenderInterceptor@1b2d7df to phase prepare-send 20120814 18:56:15,358 DEBUG Adding interceptor org.apache.cxf.jaxws.interceptors.SwAOutInterceptor@7a9224 to phase pre-logical 20120814 18:56:15,358 DEBUG Adding interceptor org.apache.cxf.jaxws.interceptors.WrapperClassOutInterceptor@110b640 to phase pre-logical 20120814 18:56:15,358 DEBUG Adding interceptor org.apache.cxf.jaxws.interceptors.HolderOutInterceptor@2d59a3 to phase pre-logical 20120814 18:56:15,358 DEBUG Adding interceptor org.apache.cxf.interceptor.AttachmentOutInterceptor@158015a to phase pre-stream 20120814 18:56:15,358 DEBUG Adding interceptor org.apache.cxf.interceptor.StaxOutInterceptor@c0c8b5 to phase pre-stream 20120814 18:56:15,358 DEBUG Adding interceptor org.apache.cxf.binding.soap.interceptor.SoapHeaderOutFilterInterceptor@b914b3 to phase pre-logical 20120814 18:56:15,358 DEBUG Adding interceptor org.apache.cxf.interceptor.BareOutInterceptor@fdfc58 to phase marshal 20120814 18:56:15,358 DEBUG Adding interceptor org.apache.cxf.binding.soap.interceptor.SoapPreProtocolOutInterceptor@c22a3b to phase post-logical 20120814 18:56:15,359 DEBUG Adding interceptor org.apache.cxf.binding.soap.interceptor.SoapOutInterceptor@1629e71 to phase write 20120814 18:56:15,360 DEBUG Chain org.apache.cxf.phase.PhaseInterceptorChain@31688f was created. Current flow: pre-logical [HolderOutInterceptor, SwAOutInterceptor, WrapperClassOutInterceptor, SoapHeaderOutFilterInterceptor] post-logical [SoapPreProtocolOutInterceptor] prepare-send [MessageSenderInterceptor, GZIPOutInterceptor] pre-stream [AttachmentOutInterceptor, StaxOutInterceptor] write [SoapOutInterceptor] marshal [BareOutInterceptor] 20120814 18:56:15,361 DEBUG Invoking handleMessage on interceptor org.apache.cxf.jaxws.interceptors.HolderOutInterceptor@2d59a3 20120814 18:56:15,361 DEBUG op: [OperationInfo: {https://asp.cyberbooking.co.kr/TopasApiSvc/services}getAirAvail] 20120814 18:56:15,361 DEBUG op.hasOutput(): true 20120814 18:56:15,361 DEBUG op.getOutput().size(): 2 20120814 18:56:15,361 DEBUG Invoking handleMessage on interceptor org.apache.cxf.jaxws.interceptors.SwAOutInterceptor@7a9224 20120814 18:56:15,364 DEBUG Invoking handleMessage on interceptor org.apache.cxf.jaxws.interceptors.WrapperClassOutInterceptor@110b640 20120814 18:56:15,364 DEBUG Invoking handleMessage on interceptor org.apache.cxf.binding.soap.interceptor.SoapHeaderOutFilterInterceptor@b914b3 20120814 18:56:15,365 DEBUG Invoking handleMessage on interceptor org.apache.cxf.binding.soap.interceptor.SoapPreProtocolOutInterceptor@c22a3b 20120814 18:56:15,365 DEBUG Invoking handleMessage on interceptor org.apache.cxf.interceptor.MessageSenderInterceptor@1b2d7df 20120814 18:56:15,365 DEBUG Adding interceptor org.apache.cxf.interceptor.MessageSenderInterceptor$MessageSenderEndingInterceptor@dc9065 to phase prepare-send-ending 20120814 18:56:15,366 DEBUG Chain org.apache.cxf.phase.PhaseInterceptorChain@31688f was modified. Current flow: pre-logical [HolderOutInterceptor, SwAOutInterceptor, WrapperClassOutInterceptor, SoapHeaderOutFilterInterceptor] post-logical [SoapPreProtocolOutInterceptor] prepare-send [MessageSenderInterceptor, GZIPOutInterceptor] pre-stream [AttachmentOutInterceptor, StaxOutInterceptor] write [SoapOutInterceptor] marshal [BareOutInterceptor] prepare-send-ending [MessageSenderEndingInterceptor] 20120814 18:56:15,366 DEBUG Invoking handleMessage on interceptor org.apache.cxf.transport.http.gzip.GZIPOutInterceptor@1682a53 20120814 18:56:15,366 DEBUG Requestor role, so gzip enabled 20120814 18:56:15,366 DEBUG gzip permitted: YES 20120814 18:56:15,367 DEBUG Invoking handleMessage on interceptor org.apache.cxf.interceptor.AttachmentOutInterceptor@158015a 20120814 18:56:15,367 DEBUG Invoking handleMessage on interceptor org.apache.cxf.interceptor.StaxOutInterceptor@c0c8b5 20120814 18:56:15,370 DEBUG Adding interceptor org.apache.cxf.interceptor.StaxOutInterceptor$StaxOutEndingInterceptor@1f488f1 to phase pre-stream-ending 20120814 18:56:15,370 DEBUG Chain org.apache.cxf.phase.PhaseInterceptorChain@31688f was modified. Current flow: pre-logical [HolderOutInterceptor, SwAOutInterceptor, WrapperClassOutInterceptor, SoapHeaderOutFilterInterceptor] post-logical [SoapPreProtocolOutInterceptor] prepare-send [MessageSenderInterceptor, GZIPOutInterceptor] pre-stream [AttachmentOutInterceptor, StaxOutInterceptor] write [SoapOutInterceptor] marshal [BareOutInterceptor] pre-stream-ending [StaxOutEndingInterceptor] prepare-send-ending [MessageSenderEndingInterceptor] 20120814 18:56:15,370 DEBUG Invoking handleMessage on interceptor org.apache.cxf.binding.soap.interceptor.SoapOutInterceptor@1629e71 20120814 18:56:15,383 DEBUG Adding interceptor org.apache.cxf.binding.soap.interceptor.SoapOutInterceptor$SoapOutEndingInterceptor@1ce663c to phase write-ending 20120814 18:56:15,384 DEBUG Chain org.apache.cxf.phase.PhaseInterceptorChain@31688f was modified. Current flow: pre-logical [HolderOutInterceptor, SwAOutInterceptor, WrapperClassOutInterceptor, SoapHeaderOutFilterInterceptor] post-logical [SoapPreProtocolOutInterceptor] prepare-send [MessageSenderInterceptor, GZIPOutInterceptor] pre-stream [AttachmentOutInterceptor, StaxOutInterceptor] write [SoapOutInterceptor] marshal [BareOutInterceptor] write-ending [SoapOutEndingInterceptor] pre-stream-ending [StaxOutEndingInterceptor] prepare-send-ending [MessageSenderEndingInterceptor] 20120814 18:56:15,384 DEBUG Invoking handleMessage on interceptor org.apache.cxf.interceptor.BareOutInterceptor@fdfc58 20120814 18:56:15,387 DEBUG Compressing message. 20120814 18:56:15,388 DEBUG Sending POST Message with Headers to http://test.co.kr:80/###/###/###Conduit :{https://test.co.kr/###/####}###.http-conduit Content-Type: text/xml; charset=UTF-8 20120814 18:56:15,388 DEBUG SOAPAction: "getAirAvail" 20120814 18:56:15,388 DEBUG Accept: */* 20120814 18:56:15,388 DEBUG Accept-Encoding: gzip;q=1.0, identity; q=0.5, *;q=0 20120814 18:56:15,388 DEBUG Content-Encoding: gzip 20120814 18:56:15,388 DEBUG No Trust Decider for Conduit '{https://test.co.kr/###/###}###.http-conduit'. An afirmative Trust Decision is assumed. 20120814 18:56:15,394 DEBUG Invoking handleMessage on interceptor org.apache.cxf.binding.soap.interceptor.SoapOutInterceptor$SoapOutEndingInterceptor@1ce663c 20120814 18:56:15,394 DEBUG Invoking handleMessage on interceptor org.apache.cxf.interceptor.StaxOutInterceptor$StaxOutEndingInterceptor@1f488f1 20120814 18:56:15,394 DEBUG Invoking handleMessage on interceptor org.apache.cxf.interceptor.MessageSenderInterceptor$MessageSenderEndingInterceptor@dc9065 20120814 18:56:15,459 DEBUG Response Code: 200 Conduit: {https://test.co.kr/###/###}###.http-conduit 20120814 18:56:15,459 DEBUG Content length: 11034 20120814 18:56:15,459 DEBUG Header fields: null: [HTTP/1.1 200 OK] Content-Language: [ko-KR] Date: [Tue, 14 Aug 2012 09:56:15 GMT] Content-Length: [11034] P3P: [CP='CAO PSA CONi OTR OUR DEM ONL'] Expires: [Thu, 01 Dec 1994 16:00:00 GMT] Keep-Alive: [timeout=10, max=100] Set-Cookie: [WMONID=mL6rq_Irpa_; Expires=Wed, 14 Aug 2013 09:56:15 GMT; Path=/] Connection: [Keep-Alive] Content-Type: [text/xml; charset=utf-8] Server: [IBM_HTTP_Server] Cache-Control: [no-cache="set-cookie, set-cookie2"]

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• Revisiting .NET, but what should I focus on?

  - by Wayne M

  After about a two-year hiatus, I'm brushing up on my .NET skills to find a .NET job (my previous two positions have very little development, or development using legacy technologies, so apart from a few very minor apps I have not touched .NET in close to two years). I'm aware of things like ASP.NET MVC, and I have previously read on things like NHibernate and DI/IOC, albeit I have yet to use them apart from very trivial "Hello World" type applications. I have a subscription to Rob Conery's Tekpub website and occasionally watch these videos when I have free time. My concern is this: I don't live in a very technical area. I would be surprised if any but the most tech-savvy companies have heard of, let alone use, ASP.NET MVC, NHibernate (or even LINQ/EF), or know about IoC. I would be willing to bet a large sum of money that 95% of the possible jobs I could obtain will use the following: Visual Source Safe, if any VCS at all ASP.NET 2.0 Webforms (3.5 if lucky) Raw ADO.NET on top of a very thin implementation of the Gateway pattern Stored Procedures in the database for most CRUD operations Gratuitous use of code-behind, with a Service layer if I'm lucky If I were extremely lucky, I might find a shop that has heard of ORMs and either uses one, or has wrote their own data abstraction. Also if I were lucky, the company would be using Model-View-Presenter. In light of this I'm not sure what I should focus on learning. Personally, I would prefer to be using the latest stuff - ASP.NET MVC, NHibernate, jQuery, WCF etc. Reality says I should go back to the basics, since it looks like most potential opportunities aren't going to be anywhere near the cutting edge, or anywhere close to it. And, as much as I would like to find a position and start to show the other developers the benefits, in my past experience this has usually resulted in my being fired for "not being a team player" and doing things the bad old way. So, I am curious how you would approach a situation like this? What should I focus on, in order to A) Reaquaint myself with .NET, and B) Prepare myself to obtain a .NET job again that is more than likely going to use techniques that I and most other knowledgeable developers will scoff at?

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• MDI WinForm application and duplicate child form memory leak

  - by Steve

  This is a WinForm MDI application problem (.net framework 3.0). It will be described in C#. Sorry it is a bit long because I try to make things as clear as possible. I have a MDI application. At some point I find that one MDI child form is never released. There is a menu that creates the MDI child form and show it. When the MDI child form is closed, it is supposed to be destroyed and the memory taken by it should be given back to .net. But to my surprise, this is not true. All the MDI child form instances are kept in memory. This is obviously a "memory leak". Well, it is not a real leak in .net. It is just that I think the closed form should be dead but somehow there is at least one unknown reference from outside world that still connect with the closed form. I read some articles on the Web. Some says that when the MDI child form is closing, I should unwire all the event handlers, otherwise some event handlers may keep my form alive. Some says that DataBindings should be cleaned before the form is closing otherwise the DataBindings will add references to some global Hashtable and thus keep my form alive. My form contains quite a lot things. Many event handlers and many DataBindings and many BindingSources and few suspected controls containing user control and HelpProvider. I create a big method that unwires all the event handlers from all the relevant controls, clear all the DataBindings and DataSources. The HelpProvider and user controls are disposed carefully. At the end, I find that, I don't have to clear DataBindings and DataSources. Event handlers are definitely causing the problem. And MDI form structure also contributes to something. During my experiments, I find that, if you create a MDI child form, even if you close it, there will still be one instance in the memory. The reference is from PropertyStore of the main form. This means, unless the main form is closed (application ends), there will always be one instance of MDI child form in the memory. The good news is that, no matter how many times you open and close the child form, there will be only one instance, not a big "leak". When it comes to event handlers, things become more tricky. I have to address that, all the event handlers on my form are anonymous event handlers. Here is an example code: //On MDI child form's design code... Button btnSave = new Button(); btnSave.Click += new System.EventHandler(btnSave_Click); Where btnSave_Click is also a method in MDI child form. The above is always the case for various controls and various types of event. To me, this is a bi-directional circular reference. btnSave keeps a reference of MDI child form via the event handler. MDI child form keeps a reference of btnSave instance. To me again, such bi-directional circular reference should not cause any problem for .net's garbage collector. This means that I do not have to explicitly unwire the event when the form is being disposed: btnSave.Click -= btnSave_Click; But the truth is not so. For some event handlers, they are safe. Ignoring them do not cause any duplicate instance. For some other event handlers, they will cause one instance remaining in the memory (similar effect as the MDI form structure, but this time caused by the hanging event handlers). For some other event handlers, they will cause every instance opened in the memory. I am totally confused about the differences between these three types of event handlers. The controls are created in the same way and the event is attached in the same way. What is the difference? (Don't tell me it is the event handle methods that make difference.) Anyone has experience of this wired scenario and has an answer for me? Thanks a lot. So now, for safety issue, I will have to unwire all the event handlers when the form is being disposed. That will be a long list of similar code for each control. Is there a general way of removing events from controls in recursive way using reflection? What about performance issue? That's the end of my story and I am still in the middle of my problem. For any help, I thank you.

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• Binding a wpf listbox to a combobox

  - by user293545

  Hi there, I have created a very basic wpf application that I want to use to record time entries against different projects. I havent used mvvm for this as I think its an overkill. I have a form that contains a combobox and a listbox. I have created a basic entity model like this What I am trying to do is bind the combobox to Project and whenever I select an item from the combobox it updates the listview with the available tasks associated with that project. This is my xaml so far. I dont have any code behind as I have simply clicked on that Data menu and then datasources and dragged and dropped the items over. The application loads ok and the combobox is been populated however nothing is displaying in the listbox. Can anyone tell me what I have missed? <Window.Resources> <CollectionViewSource x:Key="tasksViewSource" d:DesignSource="{d:DesignInstance l:Task, CreateList=True}" /> <CollectionViewSource x:Key="projectsViewSource" d:DesignSource="{d:DesignInstance l:Project, CreateList=True}" /> </Window.Resources> <Grid DataContext="{StaticResource tasksViewSource}"> <l:NotificationAreaIcon Text="Time Management" Icon="Resources\NotificationAreaIcon.ico" MouseDoubleClick="OnNotificationAreaIconDoubleClick"> <l:NotificationAreaIcon.MenuItems> <forms:MenuItem Text="Open" Click="OnMenuItemOpenClick" DefaultItem="True" /> <forms:MenuItem Text="-" /> <forms:MenuItem Text="Exit" Click="OnMenuItemExitClick" /> </l:NotificationAreaIcon.MenuItems> </l:NotificationAreaIcon> <Button Content="Insert" Height="23" HorizontalAlignment="Left" Margin="150,223,0,0" Name="btnInsert" VerticalAlignment="Top" Width="46" Click="btnInsert_Click" /> <ComboBox Height="23" HorizontalAlignment="Left" Margin="70,16,0,0" Name="comProjects" VerticalAlignment="Top" Width="177" DisplayMemberPath="Project1" ItemsSource="{Binding Source={StaticResource projectsViewSource}}" SelectedValuePath="ProjectID" /> <Label Content="Projects" Height="28" HorizontalAlignment="Left" Margin="12,12,0,0" Name="label1" VerticalAlignment="Top" IsEnabled="False" /> <Label Content="Tasks" Height="28" HorizontalAlignment="Left" Margin="16,61,0,0" Name="label2" VerticalAlignment="Top" /> <ListBox Height="112" HorizontalAlignment="Left" Margin="16,87,0,0" Name="lstTasks" VerticalAlignment="Top" Width="231" DisplayMemberPath="Task1" ItemsSource="{Binding Path=ProjectID, Source=comProjects}" SelectedValuePath="TaskID" /> <TextBox Height="23" HorizontalAlignment="Left" Margin="101,224,0,0" Name="txtMinutes" VerticalAlignment="Top" Width="42" /> <Label Content="Mins to Insert" Height="28" HorizontalAlignment="Left" Margin="12,224,0,0" Name="label3" VerticalAlignment="Top" /> <Button Content="None" Height="23" HorizontalAlignment="Left" Margin="203,223,0,0" Name="btnNone" VerticalAlignment="Top" Width="44" /> </Grid>

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• Div positioning problem related to Relative and Absolute positioning

  - by abszero

  Hello everyone. The problem I am running into is related to a footer I have absolutely positioned at the bottom of the page. Everything is fine until the copy on the page begins to extend further down the page which then causes my content wells to extend down, behind, the footer. Is there anyway I can force my content wells to 'push' the footer down the page? Here is the relevant html: <div id="page"> <div id="page_container"> <div id="header"></div> <div id="nav"></div> <div id="main_content"> <div id="left_column"></div> <div id="right_column"></div> </div> </div> </div> <div id="footer"> <div id="footer_container"> </div> </div> And the relevant CSS #page {width:100%;margin:0 0 10px 0; text-align:center;} #page_container {width:743px;height:auto !important;height:100%;margin:0 auto;min-height:100%;text-align:center;overflow:hidden;border:2px solid #000;} #header {width:100%;background:url('../images/header.jpg');height:87px;clear:both; margin-top: -2px;} #nav {width:100%;height:29px;float:left; text-align:left; border-bottom: solid 2px #000; border-top: solid 2px #000;} #main_content {width:100%;float:left; text-align:left; background-color:#fff; border-bottom: solid 2px #000; border-left: solid 2px #000; border-right: solid 2px #000;} #footer {width:100%; position:absolute;margin-top:10px; bottom: 0; background:url('../images/footer_bg.jpg');height:133px;text-align:center;} #footer_container{width:746px;height:133px; text-align:left; display:inline-block;} #left_column {width:230px; float:left; text-align:left; background-color:#fff; margin-top:5px;} #right_column {width:490px; float:right; text-align:left; background-color:#fff;margin-top:5px; padding:10px;} Thanks for any help you might be able to give!

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• Cannot connect to one of my WCF services, not even with telnet

  - by Ecyrb

  I have six wcf services that I'm hosting in a windows service. Everything works great on my machine (Windows 7) but when I try it in production (Windows Server 2003) I cannot connect to one of my six services, ReportsService. I figured I must have a typo, but everything looks right. I've even rewritten that section of the config file just to be sure. I've turned on WCF tracing, but it never shows the call to my service; nothing helpful in there. I tried connecting to the port (9005) with telnet, but it failed. I can connect to all other services (ports 9001-4 and 9006) just fine. I thought that maybe there was a problem with port 9005, so I changed it to 9007 and still couldn't connect. I had one of my working services host on 9005 and it actually worked fine. So I'm pretty sure there's nothing wrong with the port or any firewall settings. Whatever port I tell ReportsService to use fails. Now I'm out of ideas. It seems like it's not hosting that one service, but I cannot get any information about why or what's wrong. Any ideas on what I could try to get that information? Or what might be wrong? The unhandled System.ServiceModel.EndpointNotFoundException I get when running my client is: Could not connect to net.tcp://localhost:9005/ReportsService. The connection attempt lasted for a time span of 00:00:01.0937430. TCP error code 10061: No connection could be made because the target machine actively refused it 172.0.0.1:9005. . My host's config file contains: <!-- Snipped other services to simplify for you. --> <endpoint binding="netTcpBinding" bindingConfiguration="customTcpBinding" contract="ServiceContracts.IReportsService" /> <endpoint binding="netTcpBinding" bindingConfiguration="customTcpBinding" contract="ServiceContracts.IUpdateData" /> IReportService is the one I'm having trouble with. I get a proxy to IReportsService with the following code, where Server is the name of the hosting machine: return new ChannelFactory<IReportsService>("").CreateChannel(new EndpointAddress(string.Format("net.tcp://{0}:9005/ReportsService", Server))); My client config file contains: <system.serviceModel> <bindings> <netTcpBinding> <binding name="customTcpBinding" maxReceivedMessageSize="2147483647"> <readerQuotas maxNameTableCharCount="2147483647" maxStringContentLength="2147483647"/> <security mode="None"/> </binding> </netTcpBinding> </bindings> <behaviors> <serviceBehaviors> <behavior name="ServiceBehavior"> <serviceMetadata httpGetEnabled="True"/> <serviceDebug includeExceptionDetailInFaults="True" /> <serviceThrottling maxConcurrentCalls="30" maxConcurrentInstances="30" maxConcurrentSessions="1000" /> </behavior> </serviceBehaviors> </behaviors> <services> <!-- Snipped other services to simplify for you. --> <service behaviorConfiguration="ServiceBehavior" name="WcfService.ReportsService"> <endpoint address="ReportsService" binding="netTcpBinding" bindingConfiguration="customTcpBinding" contract="ServiceContracts.IReportsService" /> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" /> <host> <baseAddresses> <add baseAddress="net.tcp://localhost:9005" /> </baseAddresses> </host> </service> <service behaviorConfiguration="ServiceBehavior" name="WcfService.UpdateData"> <endpoint address="UpdateData" binding="netTcpBinding" bindingConfiguration="customTcpBinding" contract="ServiceContracts.IUpdateData" /> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" /> <host> <baseAddresses> <add baseAddress="net.tcp://localhost:9006" /> </baseAddresses> </host> </service> </services> </system.serviceModel> I've tried to keep things simple with the code snippets above, but if you would like to see more just ask and I'd be happy to provide anything that'll help.

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• Facebook Connect login button not rendering

  - by tloflin

  I'm trying to implement a Facebook Connect Single Sign-on site. I originally just had a Connect button (<fb:login-button>), which the user had to click every time they wanted to sign in. I now have the auto login and logout features working. That is, my site will detect a logged-in Facebook account and automatically authenticate them if it can find a match to one of my site's user accounts, and automatically deauthenticate if the Facebook session is lost. I also have a manual logout button that will log the user out of both my site and Facebook. All of those are working correctly, but now my original Connect button is intermittently not being rendered correctly. It just shows up as the plain XHTML (ie., it looks like plain text--not a button--and is unclickable), and no XFBML is applied. Here is the basic code: On every page: <body> {...} <script src="http://static.ak.connect.facebook.com/js/api_lib/v0.4/FeatureLoader.js.php" type="text/javascript"></script> <script type="text/javascript> FB.init('APIKey', '/xd_receiver.htm'); var isAuth; // isAuth determines if the user is authenticated on my site // it should be true on the logout page, false on the login page FB.ensureInit(function(){ var session = FB.Facebook.apiClient.get_session(); if (session && !isAuth) { PageMethods.FacebookLogin(session.uid, session.session_key, FBLogin, FBLoginFail); // This is an AJAX call that authenticates the user on my site. } else if(!session && isFBAuth) { PageMethods.FacebookLogout(FBLogout, FBLogoutFail); // This is an AJAX call that deauthenticates the user on my site. } // the callback functions do nothing at the moment }); </script> {...} </body> On the login page: (this page is not visible to logged in users) <body> {...} <script src="http://static.ak.connect.facebook.com/js/api_lib/v0.4/FeatureLoader.js.php" type="text/javascript"></script> <script type="text/javascript> FB.init('APIKey', '/xd_receiver.htm'); {...} // auto-auth code as on every page </script> <!-- This is the button that fails to render --> <fb:login-button v="2" onlogin="UserSignedIntoFB();" size="large" autologoutlink="true"><fb:intl>Login With Your Facebook Account</fb:intl></fb:login-button> <script type="text/javascript"> function UserSignedIntoFB() { {...} // posts back to the server which authenticates the user on my site & redirects } </script> {...} </body> On the logout page: (this page is not visible to logged out users) <body> {...} <script src="http://static.ak.connect.facebook.com/js/api_lib/v0.4/FeatureLoader.js.php" type="text/javascript"></script> <script type="text/javascript> FB.init('APIKey', '/xd_receiver.htm'); {...} // auto-auth code as on every page </script> <script type="text/javascript"> function FBLoggedOut() { {...} // posts back to the server which deauthenticates the user on my site & redirects to login } function Logout() { if (FB.Facebook.apiClient.get_session()) { FB.Connect.logout(FBLoggedOut); // logs out of Facebook if it's a Facebook account return false; } else { return true; // posts back if it's a non-Facebook account & redirects to login } } </script> <a onclick="return Logout();" href="postback_url">Sign Out</a> {...} </body> Some things I've already looked at: The automatic login and logout are working great. I can log in and out of Facebook on another tab and my site will notice the session changes and update accordingly. The logout seems to be working fine: when clicked, it deauthenticates the user and logs them out of Facebook, as intended. The issue seems to usually happen after a Facebook user is logged out, but it happens somewhat intermittently; it might happen before they ever login, and it goes away after a few minutes/refreshes. Some cookies are left over after the login/logout process, but deleting them does not fix the issue. Restarting the browser does not fix the issue. The user is definitely logged out of Facebook and my site when the problem occurs. I've checked for Facebook sessions and site authentication. All external script calls are being served up correctly. I have a suspicion that there's something else I need to be doing upon logout (like clearing session or cookies), but according to everything I've read about Facebook Connect, all I need to do is call the logout function (and deauthenticate on my server-side). I'm really at a loss; does anybody have any ideas what could be wrong?

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• Advice on my jQuery Ajax Function

  - by NessDan

  So on my site, a user can post a comment on 2 things: a user's profile and an app. The code works fine in PHP but we decided to add Ajax to make it more stylish. The comment just fades into the page and works fine. I decided I wanted to make a function so that I wouldn't have to manage 2 (or more) blocks of codes in different files. Right now, the code is as follows for the two pages (not in a separate .js file, they're written inside the head tags for the pages.): // App page $("input#comment_submit").click(function() { var comment = $("#comment_box").val(); $.ajax({ type: "POST", url: "app.php?id=<?php echo $id; ?>", data: {comment: comment}, success: function() { $("input#comment_submit").attr("disabled", "disabled").val("Comment Submitted!"); $("textarea#comment_box").attr("disabled", "disabled") $("#comments").prepend("<div class=\"comment new\"></div>"); $(".new").prepend("<a href=\"profile.php?username=<?php echo $_SESSION['username']; ?>\" class=\"commentname\"><?php echo $_SESSION['username']; ?></a><p class=\"commentdate\"><?php echo date("M. d, Y", time()) ?> - <?php echo date("g:i A", time()); ?></p><p class=\"commentpost\">" + comment + "</p>").hide().fadeIn(1000); } }); return false; }); And next up, // Profile page $("input#comment_submit").click(function() { var comment = $("#comment_box").val(); $.ajax({ type: "POST", url: "profile.php?username=<?php echo $user; ?>", data: {comment: comment}, success: function() { $("input#comment_submit").attr("disabled", "disabled").val("Comment Submitted!"); $("textarea#comment_box").attr("disabled", "disabled") $("#comments").prepend("<div class=\"comment new\"></div>"); $(".new").prepend("<a href=\"profile.php?username=<?php echo $_SESSION['username']; ?>\" class=\"commentname\"><?php echo $_SESSION['username']; ?></a><p class=\"commentdate\"><?php echo date("M. d, Y", time()) ?> - <?php echo date("g:i A", time()); ?></p><p class=\"commentpost\">" + comment + "</p>").hide().fadeIn(1000); } }); return false; }); Now, on each page the box names will always be the same (comment_box and comment_submit) so what do you guys think of this function (Note, the postComment is in the head tag on the page.): // On the page, (profile.php) $(function() { $("input#comment_submit").click(function() { postComment("profile", "<?php echo $user ?>", "<?php echo $_SESSION['username']; ?>", "<?php echo date("M. d, Y", time()) ?>", "<?php echo date("g:i A", time()); ?>"); }); }); Which leads to this function (which is stored in a separate file called functions.js): function postComment(page, argvalue, username, date, time) { if (page == "app") { var arg = "id"; } if (page == "profile") { var arg = "username"; } var comment = $("#comment_box").val(); $.ajax({ type: "POST", url: page + ".php?" + arg + "=" + argvalue, data: {comment: comment}, success: function() { $("textarea#comment_box").attr("disabled", "disabled") $("input#comment_submit").attr("disabled", "disabled").val("Comment Submitted!"); $("#comments").prepend("<div class=\"comment new\"></div>"); $(".new").prepend("<a href=\"" + page + ".php?" + arg + "=" + username + "\" class=\"commentname\">" + username + "</a><p class=\"commentdate\">" + date + " - " + time + "</p><p class=\"commentpost\">" + nl2br(comment) + "</p>").hide().fadeIn(1000); } }); return false; } That's what I came up with! So, some problems: When I hit the button the page refreshes. What fixed this was taking the return false from the function and putting it into the button click. Any way to keep it in the function and have the same effect? But my real question is this: Can any coders out there that are familiar to jQuery tell me techniques, coding practices, or ways to write my code more efficiently/elegantly? I've done a lot of work in PHP but I know that echoing the date may not be the most efficient way to get the date and time. So any tips that can really help me streamline this function and also make me better with writing jQuery are very welcome!

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• Should this immutable struct be a mutable class?

  - by ChaosPandion

  I showed this struct to a fellow programmer and they felt that it should be a mutable class. They felt it is inconvenient not to have null references and the ability to alter the object as required. I would really like to know if there are any other reasons to make this a mutable class. [Serializable] public struct PhoneNumber : ICloneable, IEquatable<PhoneNumber> { private const int AreaCodeShift = 54; private const int CentralOfficeCodeShift = 44; private const int SubscriberNumberShift = 30; private const int CentralOfficeCodeMask = 0x000003FF; private const int SubscriberNumberMask = 0x00003FFF; private const int ExtensionMask = 0x3FFFFFFF; private readonly ulong value; public int AreaCode { get { return UnmaskAreaCode(value); } } public int CentralOfficeCode { get { return UnmaskCentralOfficeCode(value); } } public int SubscriberNumber { get { return UnmaskSubscriberNumber(value); } } public int Extension { get { return UnmaskExtension(value); } } public PhoneNumber(ulong value) : this(UnmaskAreaCode(value), UnmaskCentralOfficeCode(value), UnmaskSubscriberNumber(value), UnmaskExtension(value), true) { } public PhoneNumber(int areaCode, int centralOfficeCode, int subscriberNumber) : this(areaCode, centralOfficeCode, subscriberNumber, 0, true) { } public PhoneNumber(int areaCode, int centralOfficeCode, int subscriberNumber, int extension) : this(areaCode, centralOfficeCode, subscriberNumber, extension, true) { } private PhoneNumber(int areaCode, int centralOfficeCode, int subscriberNumber, int extension, bool throwException) { value = 0; if (areaCode < 200 || areaCode > 989) { if (!throwException) return; throw new ArgumentOutOfRangeException("areaCode", areaCode, @"The area code portion must fall between 200 and 989."); } else if (centralOfficeCode < 200 || centralOfficeCode > 999) { if (!throwException) return; throw new ArgumentOutOfRangeException("centralOfficeCode", centralOfficeCode, @"The central office code portion must fall between 200 and 999."); } else if (subscriberNumber < 0 || subscriberNumber > 9999) { if (!throwException) return; throw new ArgumentOutOfRangeException("subscriberNumber", subscriberNumber, @"The subscriber number portion must fall between 0 and 9999."); } else if (extension < 0 || extension > 1073741824) { if (!throwException) return; throw new ArgumentOutOfRangeException("extension", extension, @"The extension portion must fall between 0 and 1073741824."); } else if (areaCode.ToString()[1] - 48 > 8) { if (!throwException) return; throw new ArgumentOutOfRangeException("areaCode", areaCode, @"The second digit of the area code cannot be greater than 8."); } else { value |= ((ulong)(uint)areaCode << AreaCodeShift); value |= ((ulong)(uint)centralOfficeCode << CentralOfficeCodeShift); value |= ((ulong)(uint)subscriberNumber << SubscriberNumberShift); value |= ((ulong)(uint)extension); } } public object Clone() { return this; } public override bool Equals(object obj) { return obj != null && obj.GetType() == typeof(PhoneNumber) && Equals((PhoneNumber)obj); } public bool Equals(PhoneNumber other) { return this.value == other.value; } public override int GetHashCode() { return value.GetHashCode(); } public override string ToString() { return ToString(PhoneNumberFormat.Separated); } public string ToString(PhoneNumberFormat format) { switch (format) { case PhoneNumberFormat.Plain: return string.Format(@"{0:D3}{1:D3}{2:D4} {3:#}", AreaCode, CentralOfficeCode, SubscriberNumber, Extension).Trim(); case PhoneNumberFormat.Separated: return string.Format(@"{0:D3}-{1:D3}-{2:D4} {3:#}", AreaCode, CentralOfficeCode, SubscriberNumber, Extension).Trim(); default: throw new ArgumentOutOfRangeException("format"); } } public ulong ToUInt64() { return value; } public static PhoneNumber Parse(string value) { var result = default(PhoneNumber); if (!TryParse(value, out result)) { throw new FormatException(string.Format(@"The string ""{0}"" could not be parsed as a phone number.", value)); } return result; } public static bool TryParse(string value, out PhoneNumber result) { result = default(PhoneNumber); if (string.IsNullOrEmpty(value)) { return false; } var index = 0; var numericPieces = new char[value.Length]; foreach (var c in value) { if (char.IsNumber(c)) { numericPieces[index++] = c; } } if (index < 9) { return false; } var numericString = new string(numericPieces); var areaCode = int.Parse(numericString.Substring(0, 3)); var centralOfficeCode = int.Parse(numericString.Substring(3, 3)); var subscriberNumber = int.Parse(numericString.Substring(6, 4)); var extension = 0; if (numericString.Length > 10) { extension = int.Parse(numericString.Substring(10)); } result = new PhoneNumber( areaCode, centralOfficeCode, subscriberNumber, extension, false ); return result.value == 0; } public static bool operator ==(PhoneNumber left, PhoneNumber right) { return left.Equals(right); } public static bool operator !=(PhoneNumber left, PhoneNumber right) { return !left.Equals(right); } private static int UnmaskAreaCode(ulong value) { return (int)(value >> AreaCodeShift); } private static int UnmaskCentralOfficeCode(ulong value) { return (int)((value >> CentralOfficeCodeShift) & CentralOfficeCodeMask); } private static int UnmaskSubscriberNumber(ulong value) { return (int)((value >> SubscriberNumberShift) & SubscriberNumberMask); } private static int UnmaskExtension(ulong value) { return (int)(value & ExtensionMask); } } public enum PhoneNumberFormat { Plain, Separated }

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• Thread scheduling Round Robin / scheduling dispatch

  - by MRP

  #include <pthread.h> #include <stdio.h> #include <stdlib.h> #include <semaphore.h> #define NUM_THREADS 4 #define COUNT_LIMIT 13 int done = 0; int count = 0; int quantum = 2; int thread_ids[4] = {0,1,2,3}; int thread_runtime[4] = {0,5,4,7}; pthread_mutex_t count_mutex; pthread_cond_t count_threshold_cv; void * inc_count(void * arg); static sem_t count_sem; int quit = 0; ///////// Inc_Count//////////////// void *inc_count(void *t) { long my_id = (long)t; int i; sem_wait(&count_sem); /////////////CRIT SECTION////////////////////////////////// printf("run_thread = %d\n",my_id); printf("%d \n",thread_runtime[my_id]); for( i=0; i < thread_runtime[my_id];i++) { printf("runtime= %d\n",thread_runtime[my_id]); pthread_mutex_lock(&count_mutex); count++; if (count == COUNT_LIMIT) { pthread_cond_signal(&count_threshold_cv); printf("inc_count(): thread %ld, count = %d Threshold reached.\n", my_id, count); } printf("inc_count(): thread %ld, count = %d, unlocking mutex\n",my_id, count); pthread_mutex_unlock(&count_mutex); sleep(1) ; }//End For sem_post(&count_sem); // Next Thread Enters Crit Section pthread_exit(NULL); } /////////// Count_Watch //////////////// void *watch_count(void *t) { long my_id = (long)t; printf("Starting watch_count(): thread %ld\n", my_id); pthread_mutex_lock(&count_mutex); if (count<COUNT_LIMIT) { pthread_cond_wait(&count_threshold_cv, &count_mutex); printf("watch_count(): thread %ld Condition signal received.\n", my_id); printf("watch_count(): thread %ld count now = %d.\n", my_id, count); } pthread_mutex_unlock(&count_mutex); pthread_exit(NULL); } ////////////////// Main //////////////// int main (int argc, char *argv[]) { int i; long t1=0, t2=1, t3=2, t4=3; pthread_t threads[4]; pthread_attr_t attr; sem_init(&count_sem, 0, 1); /* Initialize mutex and condition variable objects */ pthread_mutex_init(&count_mutex, NULL); pthread_cond_init (&count_threshold_cv, NULL); /* For portability, explicitly create threads in a joinable state */ pthread_attr_init(&attr); pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); pthread_create(&threads[0], &attr, watch_count, (void *)t1); pthread_create(&threads[1], &attr, inc_count, (void *)t2); pthread_create(&threads[2], &attr, inc_count, (void *)t3); pthread_create(&threads[3], &attr, inc_count, (void *)t4); /* Wait for all threads to complete */ for (i=0; i<NUM_THREADS; i++) { pthread_join(threads[i], NULL); } printf ("Main(): Waited on %d threads. Done.\n", NUM_THREADS); /* Clean up and exit */ pthread_attr_destroy(&attr); pthread_mutex_destroy(&count_mutex); pthread_cond_destroy(&count_threshold_cv); pthread_exit(NULL); } I am trying to learn thread scheduling, there is a lot of technical coding that I don't know. I do know in theory how it should work, but having trouble getting started in code... I know, at least I think, this program is not real time and its not meant to be. Some how I need to create a scheduler dispatch to control the threads in the order they should run... RR FCFS SJF ect. Right now I don't have a dispatcher. What I do have is semaphores/ mutex to control the threads. This code does run FCFS... and I have been trying to use semaphores to create a RR.. but having a lot of trouble. I believe it would be easier to create a dispatcher but I dont know how. I need help, I am not looking for answers just direction.. some sample code will help to understand a bit more. Thank you.

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• Which functions in the C standard library commonly encourage bad practice?

  - by Ninefingers

  Hello all, This is inspired by this question and the comments on one particular answer in that I learnt that strncpy is not a very safe string handling function in C and that it pads zeros, until it reaches n, something I was unaware of. Specifically, to quote R.. strncpy does not null-terminate, and does null-pad the whole remainder of the destination buffer, which is a huge waste of time. You can work around the former by adding your own null padding, but not the latter. It was never intended for use as a "safe string handling" function, but for working with fixed-size fields in Unix directory tables and database files. snprintf(dest, n, "%s", src) is the only correct "safe strcpy" in standard C, but it's likely to be a lot slower. By the way, truncation in itself can be a major bug and in some cases might lead to privilege elevation or DoS, so throwing "safe" string functions that truncate their output at a problem is not a way to make it "safe" or "secure". Instead, you should ensure that the destination buffer is the right size and simply use strcpy (or better yet, memcpy if you already know the source string length). And from Jonathan Leffler Note that strncat() is even more confusing in its interface than strncpy() - what exactly is that length argument, again? It isn't what you'd expect based on what you supply strncpy() etc - so it is more error prone even than strncpy(). For copying strings around, I'm increasingly of the opinion that there is a strong argument that you only need memmove() because you always know all the sizes ahead of time and make sure there's enough space ahead of time. Use memmove() in preference to any of strcpy(), strcat(), strncpy(), strncat(), memcpy(). So, I'm clearly a little rusty on the C standard library. Therefore, I'd like to pose the question: What C standard library functions are used inappropriately/in ways that may cause/lead to security problems/code defects/inefficiencies? In the interests of objectivity, I have a number of criteria for an answer: Please, if you can, cite design reasons behind the function in question i.e. its intended purpose. Please highlight the misuse to which the code is currently put. Please state why that misuse may lead towards a problem. I know that should be obvious but it prevents soft answers. Please avoid: Debates over naming conventions of functions (except where this unequivocably causes confusion). "I prefer x over y" - preference is ok, we all have them but I'm interested in actual unexpected side effects and how to guard against them. As this is likely to be considered subjective and has no definite answer I'm flagging for community wiki straight away. I am also working as per C99.

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• Iphone NSXMLParser NSCFString memory leak

  - by atticusalien

  I am building an app that parses an rss feed. In the app there are two different types of feeds with different names for the elements in the feed, so I have created an NSXMLParser NSObject that takes the name of the elements of each feed before parsing. Here is my code: NewsFeedParser.h #import @interface NewsFeedParser : NSObject { NSInteger NewsSelectedCategory; NSXMLParser *NSXMLNewsParser; NSMutableArray *newsCategories; NSMutableDictionary *NewsItem; NSMutableString *NewsCurrentElement, *NewsCurrentElement1, *NewsCurrentElement2, *NewsCurrentElement3; NSString *NewsItemType, *NewsElement1, *NewsElement2, *NewsElement3; NSInteger NewsNumElements; } - (void) parseXMLFileAtURL:(NSString *)URL; @property(nonatomic, retain) NSString *NewsItemType; @property(nonatomic, retain) NSString *NewsElement1; @property(nonatomic, retain) NSString *NewsElement2; @property(nonatomic, retain) NSString *NewsElement3; @property(nonatomic, retain) NSMutableArray *newsCategories; @property(assign, nonatomic) NSInteger NewsNumElements; @end NewsFeedParser.m #import "NewsFeedParser.h" @implementation NewsFeedParser @synthesize NewsItemType; @synthesize NewsElement1; @synthesize NewsElement2; @synthesize NewsElement3; @synthesize newsCategories; @synthesize NewsNumElements; - (void)parserDidStartDocument:(NSXMLParser *)parser{ } - (void)parseXMLFileAtURL:(NSString *)URL { newsCategories = [[NSMutableArray alloc] init]; URL = [URL stringByReplacingOccurrencesOfString:@" " withString:@""]; URL = [URL stringByReplacingOccurrencesOfString:@"\n" withString:@""]; URL = [URL stringByReplacingOccurrencesOfString:@" " withString:@""]; //you must then convert the path to a proper NSURL or it won't work NSURL *xmlURL = [NSURL URLWithString:URL]; // here, for some reason you have to use NSClassFromString when trying to alloc NSXMLParser, otherwise you will get an object not found error // this may be necessary only for the toolchain [[NSURLCache sharedURLCache] setMemoryCapacity:0]; [[NSURLCache sharedURLCache] setDiskCapacity:0]; NSXMLNewsParser = [[NSXMLParser alloc] initWithContentsOfURL:xmlURL]; // Set self as the delegate of the parser so that it will receive the parser delegate methods callbacks. [NSXMLNewsParser setDelegate:self]; // Depending on the XML document you're parsing, you may want to enable these features of NSXMLParser. [NSXMLNewsParser setShouldProcessNamespaces:NO]; [NSXMLNewsParser setShouldReportNamespacePrefixes:NO]; [NSXMLNewsParser setShouldResolveExternalEntities:NO]; [NSXMLNewsParser parse]; [NSXMLNewsParser release]; } - (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError { NSString * errorString = [NSString stringWithFormat:@"Unable to download story feed from web site (Error code %i )", [parseError code]]; NSLog(@"error parsing XML: %@", errorString); UIAlertView * errorAlert = [[UIAlertView alloc] initWithTitle:@"Error loading content" message:errorString delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; [errorAlert show]; [errorAlert release]; [errorString release]; } - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{ NewsCurrentElement = [elementName copy]; if ([elementName isEqualToString:NewsItemType]) { // clear out our story item caches... NewsItem = [[NSMutableDictionary alloc] init]; NewsCurrentElement1 = [[NSMutableString alloc] init]; NewsCurrentElement2 = [[NSMutableString alloc] init]; if(NewsNumElements == 3) { NewsCurrentElement3 = [[NSMutableString alloc] init]; } } } - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{ if ([elementName isEqualToString:NewsItemType]) { // save values to an item, then store that item into the array... [NewsItem setObject:NewsCurrentElement1 forKey:NewsElement1]; [NewsItem setObject:NewsCurrentElement2 forKey:NewsElement2]; if(NewsNumElements == 3) { [NewsItem setObject:NewsCurrentElement3 forKey:NewsElement3]; } [newsCategories addObject:[[NewsItem copy] autorelease]]; [NewsCurrentElement release]; [NewsCurrentElement1 release]; [NewsCurrentElement2 release]; if(NewsNumElements == 3) { [NewsCurrentElement3 release]; } [NewsItem release]; } } - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { //NSLog(@"found characters: %@", string); // save the characters for the current item... if ([NewsCurrentElement isEqualToString:NewsElement1]) { [NewsCurrentElement1 appendString:string]; } else if ([NewsCurrentElement isEqualToString:NewsElement2]) { [NewsCurrentElement2 appendString:string]; } else if (NewsNumElements == 3 && [NewsCurrentElement isEqualToString:NewsElement3]) { [NewsCurrentElement3 appendString:string]; } } - (void)dealloc { [super dealloc]; [newsCategories release]; [NewsItemType release]; [NewsElement1 release]; [NewsElement2 release]; [NewsElement3 release]; } When I create an instance of the class I do like so: NewsFeedParser *categoriesParser = [[NewsFeedParser alloc] init]; if(newsCat == 0) { categoriesParser.NewsItemType = @"article"; categoriesParser.NewsElement1 = @"category"; categoriesParser.NewsElement2 = @"catid"; } else { categoriesParser.NewsItemType = @"article"; categoriesParser.NewsElement1 = @"category"; categoriesParser.NewsElement2 = @"feedUrl"; } [categoriesParser parseXMLFileAtURL:feedUrl]; newsCategories = [[NSMutableArray alloc] initWithArray:categoriesParser.newsCategories copyItems:YES]; [self.tableView reloadData]; [categoriesParser release]; If I run the app with the leaks instrument, the leaks point to the [NSXMLNewsParser parse] call in the NewsFeedParser.m. Here is a screen shot of the Leaks instrument with the NSCFStrings leaking: http://img139.imageshack.us/img139/3997/leaks.png For the life of me I can't figure out where these leaks are coming from. Any help would be greatly appreciated.

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• SIFR 3.0 - Font Size

  - by Nick

  I have been working with SIFR 3.0 for some time now and the font-size never seems to work correctly. I understand the most basic concepts behind SIFR. SIFR runs when you load the page. It does some calculations one the size of the HTML rendered font and then replaces it with a flash movie that is roughly equal to that size. Because of this, you want to style your HTML font to match the size of your SIFR font as close as possible. My problem always comes up when trying to style these two font sizes to match. Let's say I want to use a SIFR font of Helvetica Neue Lt at about 32px. The HTML equivalent is something like Arial Narrow at about 36px with some negative letter spacing. So here is what I do. In sifr.css I'll write: @media screen { .sIFR-active h1 { visibility: hidden; z-index: 0 !important; font-size: 36px; } } Great, that gets the default HTML font the size I need. Now I need to update the flash SIFR font size. So I go into sifr-config.js and write something like this: sIFR.replace(HelveticaNeueThinCond, { selector: 'h1', css: '.sIFR-root { color: #762123; font-size: 32px; line-height: 1em; }', transparent: true }); So right now everything is working great. That is until my h1 text wraps more than one line. For some reason, when the text wraps it only shows the first line. It seems calculates the height wrong. This is very weird because I ran some tests. I took "visibility: hidden" off of "sIFR-active h1" to make sure that the HTML rendered text was the right size. It is, it takes up two lines. However, when the Flash replaces this text it gives it a min-height of one line of text. Odd. The only way I could find to fix this wrapping problem was to remove "font-size: 32px;" from "sIFR.replace(HelveticaNeueThinCond" in sifr-config. The problem I run into then is that it inherits the font-size set in sifr.css. Now the problem is that my HTML text is bigger then the SIFR text. So occasional my HTML text will wrap to a new line before my SIFR text leaving a big white space. So, how do I set two different font-size (one for my HTML text and one for my SIFR) without losing the wrapping. The only time I have been able to use the successfully is when I have a SIFR font that is so similar to a web safe font that they can share the same font-size attribute. Thanks

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• "Expected initializer before '<' token" in header file

  - by Sarah

  I'm pretty new to programming and am generally confused by header files and includes. I would like help with an immediate compile problem and would appreciate general suggestions about cleaner, safer, slicker ways to write my code. I'm currently repackaging a lot of code that used to be in main() into a Simulation class. I'm getting a compile error with the header file for this class. I'm compiling with gcc version 4.2.1. // Simulation.h #ifndef SIMULATION_H #define SIMULATION_H #include <cstdlib> #include <iostream> #include <cmath> #include <string> #include <fstream> #include <set> #include <boost/multi_index_container.hpp> #include <boost/multi_index/hashed_index.hpp> #include <boost/multi_index/member.hpp> #include <boost/multi_index/ordered_index.hpp> #include <boost/multi_index/mem_fun.hpp> #include <boost/multi_index/composite_key.hpp> #include <boost/shared_ptr.hpp> #include <boost/tuple/tuple_comparison.hpp> #include <boost/tuple/tuple_io.hpp> #include "Parameters.h" #include "Host.h" #include "rng.h" #include "Event.h" #include "Rdraws.h" typedef multi_index_container< // line 33 - first error boost::shared_ptr< Host >, indexed_by< hashed_unique< const_mem_fun<Host,int,&Host::getID> >, // 0 - ID index ordered_non_unique< tag<age>,const_mem_fun<Host,int,&Host::getAgeInY> >, // 1 - Age index hashed_non_unique< tag<household>,const_mem_fun<Host,int,&Host::getHousehold> >, // 2 - Household index ordered_non_unique< // 3 - Eligible by age & household tag<aeh>, composite_key< Host, const_mem_fun<Host,int,&Host::getAgeInY>, const_mem_fun<Host,bool,&Host::isEligible>, const_mem_fun<Host,int,&Host::getHousehold> > >, ordered_non_unique< // 4 - Eligible by household (all single adults) tag<eh>, composite_key< Host, const_mem_fun<Host,bool,&Host::isEligible>, const_mem_fun<Host,int,&Host::getHousehold> > >, ordered_non_unique< // 5 - Household & age tag<ah>, composite_key< Host, const_mem_fun<Host,int,&Host::getHousehold>, const_mem_fun<Host,int,&Host::getAgeInY> > > > // end indexed_by > HostContainer; typedef std::set<int> HHSet; class Simulation { public: Simulation( int sid ); ~Simulation(); // MEMBER FUNCTION PROTOTYPES void runDemSim( void ); void runEpidSim( void ); void ageHost( int id ); int calcPartnerAge( int a ); void executeEvent( Event & te ); void killHost( int id ); void pairHost( int id ); void partner2Hosts( int id1, int id2 ); void fledgeHost( int id ); void birthHost( int id ); void calcSI( void ); double beta_ij_h( int ai, int aj, int s ); double beta_ij_nh( int ai, int aj, int s ); private: // SIMULATION OBJECTS double t; double outputStrobe; int idCtr; int hholdCtr; int simID; RNG rgen; HostContainer allHosts; // shared_ptr to Hosts - line 102 - second error HHSet allHouseholds; int numInfecteds[ INIT_NUM_AGE_CATS ][ INIT_NUM_STYPES ]; EventPQ currentEvents; // STREAM MANAGEMENT void writeOutput(); void initOutput(); void closeOutput(); std::ofstream ageDistStream; std::ofstream ageDistTStream; std::ofstream hhDistStream; std::ofstream hhDistTStream; std::string ageDistFile; std::string ageDistTFile; std::string hhDistFile; std::string hhDistTFile; }; #endif I'm hoping the other files aren't so relevant to this problem. When I compile with g++ -g -o -c a.out -I /Applications/boost_1_42_0/ Host.cpp Simulation.cpp rng.cpp main.cpp Rdraws.cpp I get Simulation.h:33: error: expected initializer before '<' token Simulation.h:102: error: 'HostContainer' does not name a type and then a bunch of other errors related to not recognizing the HostContainer. It seems like I have all the right Boost #includes for the HostContainer to be understood. What else could be going wrong? I would appreciate immediate suggestions, troubleshooting tips, and other advice about my code. My plan is to create a "HostContainer.h" file that includes the typedef and structs that define its tags, similar to what I'm doing in "Event.h" for the EventPQ container. I'm assuming this is legal and good form.

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• ASP.NET web forms as ASP.NET MVC

  - by lopkiju

  I am sorry for possible misleading about the title, but I have no idea for a proper title. Feel free to edit. Anyway, I am using ASP.NET Web Forms, and maybe this isn't how web forms is intended to be used, but I like to construct and populate HTML elements manually. It gives me more control. I don't use DataBinding and that kind of stuff. I use SqlConnection, SqlCommand and SqlDataReader, set SQL string etc. and read the data from the DataReader. Old school if you like. :) I do create WebControls so that I don't have to copy-paste every time I need some control, but mostly, I need WebControls to render as HTML so I can append that HTML into some other function that renders the final output with the control inside. I know I can render a control with control.RenderControl(writer), but this can only be done in (pre)Render or RenderContents overrides. For example. I have a dal.cs file where is stored all static functions and voids that communicate with the database. Functions mostly return string so that it can be appended into some other function to render the final result. The reason I am doing like this is that I want to separate the coding from the HTML as much as I can so that I don't do <% while (dataReader.Read()) % in HTML and display the data. I moved this into a CodeBehind. I also use this functions to render in the HttpHandler for AJAX response. That works perfectly, but when I want to add a control (ASP.NET Server control (.cs extension, not .ascx)) I don't know how to do that, so I see my self writing the same control as function that returns string or another function inside that control that returns string and replaces a job that would RenderContents do, so that I can call that function when I need control to be appended into a another string. I know this may not be a very good practice. As I see all the tutorials/videos about the ASP.NET MVC, I think it suite my needs as with the MVC you have to construct everything (or most of it) by your self, which I am already doing right now with web forms. After this long intro, I want to ask how can I build my controls so I can use them as I mentioned (return string) or I have to forget about server controls and build the controls as functions and used them that way? Is that even possible with ASP.NET Server Controls (.cs extension) or am I right when I said that I am not using it right. To be clear, I am talking about how to properly use a web forms, but to avoid data binders because I want to construct everything by my self (render HTML in Code Behind). Someone might think that I am appending strings like "some " + "string", which I am not. I am using StringBuilder for that so there's no slowness. Every opinion is welcome.

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• Getting Rails Application Running Under IronRuby Rack

  - by NotMyself

  Anyone else playing with ironruby? I have successfully got the IronRuby.Rails.Example project running on my local machine under IIS 5.1. I am now attempting to get my own demo rails site running in the same way. My web.config is slightly different from the example project. I am attempting to only use what was distributed with IronRuby 1.0 and what I have installed using gems. I am getting the following error which doesn't give me a lot to go on: D:/demo/config/boot.rb:66:in `exit': exit (SystemExit) After trying many different things, I think it is having a problem finding gems. I have attached my web config and ironrack.log. Does anyone have pointers on what I am doing wrong? Thanks! <?xml version="1.0"?> <configuration> <configSections> <!-- custom configuration section for DLR hosting --> <section name="microsoft.scripting" type="Microsoft.Scripting.Hosting.Configuration.Section, Microsoft.Scripting" requirePermission="false"/> </configSections> <system.webServer> <handlers> <!-- clear all other handlers first. Don't do this if you have other handlers you want to run --> <clear/> <!-- This hooks up the HttpHandler which will dispatch all requests to Rack --> <add name="IronRuby" path="*" verb="*" type="IronRuby.Rack.HttpHandlerFactory, IronRuby.Rack" resourceType="Unspecified" requireAccess="Read" preCondition="integratedMode"/> </handlers> </system.webServer> <system.web> <!-- make this true if you want to debug any of the DLR code, IronRuby.Rack, or your own managed code --> <compilation debug="true"/> <httpHandlers> <!-- clear all other handlers first. Don't do this if you have other handlers you want to run --> <clear/> <!-- This hooks up the HttpHandler which will dispatch all requests to Rack --> <add path="*" verb="*" type="IronRuby.Rack.HttpHandlerFactory, IronRuby.Rack" /> </httpHandlers> </system.web> <!-- DLR configuration. Set debugMode to "true" if you want to debug your dynamic language code with VS --> <microsoft.scripting debugMode="false"> <options> <!-- Library paths: make sure these paths are correct --> <!--<set option="LibraryPaths" value="..\..\..\Languages\Ruby\libs\; ..\..\..\..\External.LCA_RESTRICTED\Languages\Ruby\ruby-1.8.6p368\lib\ruby\site_ruby\1.8\; ..\..\..\..\External.LCA_RESTRICTED\Languages\Ruby\ruby-1.8.6p368\lib\ruby\1.8\"/>--> <set option="LibraryPaths" value="C:\IronRuby\lib\IronRuby;C:\IronRuby\lib\ruby\1.8;C:\IronRuby\lib\ruby\site_ruby;C:\IronRuby\lib\ruby\site_ruby\1.8"/> </options> </microsoft.scripting> <appSettings> <add key="AppRoot" value="."/> <add key="Log" value="ironrack.log"/> <!-- <add key="GemPath" value="..\..\..\..\External.LCA_RESTRICTED\Languages\Ruby\ruby-1.8.6p368\lib\ruby\gems\1.8"/> --> <add key="GemPath" value="C:\IronRuby\Lib\ironruby\gems\1.8\gems"/> <add key="RackEnv" value="production"/> </appSettings> </configuration> === Booting ironruby-rack at 4/15/2010 1:27:12 PM [DEBUG] >>> TOPLEVEL_BINDING = binding => Setting GEM_PATH: 'C:\\IronRuby\\Lib\\ironruby\\gems\\1.8\\gems' => Setting RACK_ENV: 'production' => Loading RubyGems [DEBUG] >>> require 'rubygems' => Loading Rack >=1.0.0 [DEBUG] >>> gem 'rack', '>=1.0.0';require 'rack' => Loaded rack-1.1 => Application root: 'D:\\demo' => Loading Rack application [DEBUG] >>> Rack::Builder.new { ( require "config/environment" ENV['RAILS_ENV'] = 'development' use Rails::Rack::LogTailer use Rails::Rack::Static run ActionController::Dispatcher.new ) }.to_app exit D:/demo/config/boot.rb:66:in `exit': exit (SystemExit) from D:/demo/config/boot.rb:66:in `load_rails_gem' from D:/demo/config/boot.rb:54:in `load_initializer' from D:/demo/config/boot.rb:38:in `run' from D:/demo/config/boot.rb:11:in `boot!' from D:/demo/config/boot.rb:110 from C:/IronRuby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' from C:/IronRuby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' from D:/demo/config/environment.rb:7 from C:/IronRuby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' from C:/IronRuby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' from (eval):1 from C:/IronRuby/lib/ironruby/gems/1.8/gems/rack-1.1.0/lib/rack/builder.rb:46:in `instance_eval' from C:/IronRuby/lib/ironruby/gems/1.8/gems/rack-1.1.0/lib/rack/builder.rb:46:in `initialize' from (eval):0 from D:\Dev\ironruby\ironruby-ironruby-20bc41b\Merlin\Main\Hosts\IronRuby.Rack\RubyEngine.cs:52:in `Execute' from D:\Dev\ironruby\ironruby-ironruby-20bc41b\Merlin\Main\Hosts\IronRuby.Rack\RubyEngine.cs:45:in `Execute' from D:\Dev\ironruby\ironruby-ironruby-20bc41b\Merlin\Main\Hosts\IronRuby.Rack\Application.cs:68:in `Rackup' from D:\Dev\ironruby\ironruby-ironruby-20bc41b\Merlin\Main\Hosts\IronRuby.Rack\Application.cs:32:in `.ctor' from D:\Dev\ironruby\ironruby-ironruby-20bc41b\Merlin\Main\Hosts\IronRuby.Rack\HttpHandlerFactory.cs:37:in `GetHandler' from System.Web:0:in `MapHttpHandler' from System.Web:0:in `System.Web.HttpApplication.IExecutionStep.Execute' from System.Web:0:in `ExecuteStep' from System.Web:0:in `ResumeSteps' from System.Web:0:in `System.Web.IHttpAsyncHandler.BeginProcessRequest' from System.Web:0:in `ProcessRequestInternal' from System.Web:0:in `ProcessRequestNoDemand' from System.Web:0:in `ProcessRequest'

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• Why not .NET-style delegates rather than closures in Java?

  - by h2g2java

  OK, this is going to be my beating a dying horse for the 3rd time. However, this question is different from my earlier two about closures/delegates, which asks about plans for delegates and what are the projected specs and implementation for closures. This question is about - why is the Java community struggling to define 3 different types of closures when we could simply steal the whole concept of delegates lock, stock and barrel from our beloved and friendly neighbour - Microsoft. There are two non-technical conclusions I would be very tempted to jump into: The Java community should hold up its pride, at the cost of needing to go thro convoluted efforts, by not succumbing to borrowing any Microsoft concepts or otherwise vindicate Microsoft's brilliance. Delegates is a Microsoft patented technology. Alright, besides the above two possibilities, Q1. Is there any weakness or inadequacy in msft-styled delegates that the three (or more) forms of closures would be addressing? Q2. I am asking this while shifting between java and c# and it intrigues me that c# delegates does exactly what I needed. Are there features that would be implemented in closures that are not currently available in C# delegates? If so what are they because I cannot see what I need more than what C# delegates has adequately provided me? Q3. I know that one of the concerns about implementing closures/delegates in java is the reduction of orthogonality of the language, where more than one way is exposed to perform a particular task. Is it worth the level convolution and time spent to avoid delegates just to ensure java retains its level of orthogonality? In SQL, we know that it is advisable to break orthogonality by frequently adequately satisfying only the 2nd normal form. Why can't java be subjected to reduction of orthogonality and OO-ness for the sake of simplicity? Q4. The architecture of JVM is technically constrained from implementing .NET-styled delegates. If this reason WERE (subjunctive to emphasize unlikelihood) true, then why can't the three closures proposals be hidden behind a simple delegate keyword or annotation: if we don't like to use @delegate, we could use @method. I cannot see how delegate statement format is more complex than the three closure proposals.

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• WPF - Redrawing a Context Menu when Items change?

  - by Rachel

  I have a ItemsControl in a ScrollViewer, and when the items exceed the width of the ScrollViewer they are put into a ContextMenu and shown as a DropDown instead. My problem is that when the Context Menu is first loaded, it saves the saves the size of the Menu and does not redraw when more commands get added/removed. For example, a panel has 3 commands. 1 is visible and 2 are in the Menu. Viewing the menu shows the 2 commands and draws the control, but then if you resize the panel so 2 are visible and only 1 command is in the menu, it doesn't redraw the menu to eliminate that second menu item. Or even worse, if you shrink the panel so that no commands are shown and all 3 are in the Menu, it will only show the top 2. Here's my code: <Button Click="DropDownMenu_Click" ContextMenuOpening="DropDownMenu_ContextMenuOpening"> <Button.ContextMenu> <ContextMenu ItemsSource="{Binding Path=MenuCommands}" Placement="Bottom"> <ContextMenu.Resources> <Style TargetType="{x:Type MenuItem}"> <Setter Property="Command" Value="{Binding Path=Command}" /> <Setter Property="Visibility" Value="{Binding Path=IsVisible, Converter={StaticResource ReverseBooleanToVisibilityConverter}}"/> </Style> </ContextMenu.Resources> <ContextMenu.ItemTemplate> <DataTemplate> <TextBlock Text="{Binding Path=DisplayName}" /> </DataTemplate> </ContextMenu.ItemTemplate> </ContextMenu> </Button.ContextMenu> </Button> Code Behind: void DropDownMenu_ContextMenuOpening(object sender, ContextMenuEventArgs e) { Button b = sender as Button; b.ContextMenu.IsOpen = false; e.Handled = true; } private void DropDownMenu_Click(object sender, RoutedEventArgs e) { Button b = sender as Button; ContextMenu cMenu = b.ContextMenu; if (cMenu != null) { cMenu.PlacementTarget = b; cMenu.Placement = System.Windows.Controls.Primitives.PlacementMode.Bottom; } } I have tried using InvalidateVisual and passing an empty delegate on Render to try and force a redraw, however neither works. I'm using .Net 4.0.

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• display data from json file in datagrid

  - by kayn

  I want to display data from a json files in a data grid using dojo ver 1.0.0. I am able to diplay the data when i declare it on my code but when i store the same data in a json format so i can reference it in my script,i get an empty grid. This is my json file; { data: [ ['10''myfile','Css', 'CS Degree','Dr. Bottoman','This is mine'], ['10'myfile2','CS716', 'CS Degree','Prof Frank', 'This is course'], ['10'myfile3 ','CS714', 'CS Degree', 'Dr. Ree', 'Welcome'], ['14', 'myfile4','CS772', 'CS Degree', 'Mr. Boss', 'This will display content' ], ['18', 'myfile5','CS774', 'CS Degree','Ms. Kirk', 'This is networks.' ] ] } and below is my code; @import "../../../dojo/resources/dojo.css"; @import "../_grid/Grid.css"; body { font-size: 1.0em; } #grid { height: 400px; border: 1px solid silver; } .text-oneline { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; } .text-scrolling { height: 4em; overflow: auto; } .text-scrolling { width: 21.5em; } dojo.require("dojox.grid.Grid"); dojo.require("dojox.grid._data.model"); dojo.require("dojo.parser"); <script type="text/javascript"> /*<span dojoType="dojo.data.ItemFileWriteStore" jsId="myStore" url="course.json"> </span>*/ data = [ ['10''myfile','Css', 'CS Degree','Dr. Bottoman','This is mine'], ['10'myfile2','CS716', 'CS Degree','Prof Frank', 'This is course'], ['10'myfile3 ','CS714', 'CS Degree', 'Dr. Ree', 'Welcome'], ['14', 'myfile4','CS772', 'CS Degree', 'Mr. Boss', 'This will display content' ], ['18', 'myfile5','CS774', 'CS Degree','Ms. Kirk', 'This is networks.' ] ]; getDetailData = function(inRowIndex) { var row = data[this.grid.dataRow % data.length ]; switch (this.index) { case 0: return row[5]; case 1: return row[2]; case 2: return row[0]; case 3: return row[1]; case 4: return row[3]; case 5: return row[4]; default: return row[this.index]; } } getName = function(inRowIndex) { var row = data[inRowIndex % data.length]; return row[1]; } // Main grid structure var gridCells = [ { type: 'dojox.GridRowView', width: '20px' }, { onBeforeRow: function(inDataIndex, inSubRows) { inSubRows[1].hidden = !detailRows[inDataIndex]; }, cells: [[ { name: 'Master', width: 3, get: getCheck, styles: 'text-align: center;' }, { name: 'Detail', get: getName, width: 60 }, ], [ { name: '', get: getDetail, colSpan: 2, styles: 'padding: 0; margin: 0;'} ]] } ]; // html for the +/- cell function getCheck(inRowIndex) { var image = (detailRows[inRowIndex] ? 'open.gif' : 'closed.gif'); var show = (detailRows[inRowIndex] ? 'false' : 'true') return ''; } // provide html for the Detail cell in the master grid function getDetail(inRowIndex) { var cell = this; // we can affect styles and content here, but we have to wait to access actual nodes setTimeout(function() { buildDetailgrid(inRowIndex, cell); }, 1); // look for a Detailgrid var Detailgrid = dijit.byId(makeDetailgridId(inRowIndex)); var h = (Detailgrid ? Detailgrid.cacheHeight : "120") + "px"; // insert a placeholder return ''; } // the Detail cell contains a Detailgrid which we set up below var DetailgridCells = [{ noscroll: true, cells: [ [ {name: "Brief Course Description",width: "auto"}, {name: "Course Code" }, {name: "Credits" }, {name: "Subject" }, {name: "Prerequisite" }, {name: "Lecturer"}], [] ]}]; var DetailgridProps = { structure: DetailgridCells, rowCount: 1, autoHeight: true, autoRender: false, "get": getDetailData }; // identify Detailgrids by their row indices function makeDetailgridId(inRowIndex) { return grid.widgetId + "Detailgrid"/+ inRowIndex/; } // if a Detailgrid exists at inRowIndex, detach it from the DOM function detachDetailgrid(inRowIndex) { var Detailgrid = dijit.byId(makeDetailgridId(inRowIndex)); if (Detailgrid) dojox.grid.removeNode(Detailgrid.domNode); } // render a Detailgrid into inCell at inRowIndex function buildDetailgrid(inRowIndex, inCell) { var n = inCell.getNode(inRowIndex).firstChild; var id = makeDetailgridId(inRowIndex); var Detailgrid = dijit.byId(id); if (Detailgrid) { n.appendChild(Detailgrid.domNode); } else { DetailgridProps.dataRow = inRowIndex; DetailgridProps.widgetId = id; Detailgrid = new dojox.VirtualGrid(DetailgridProps, n); } if (Detailgrid) { Detailgrid.render(); Detailgrid.cacheHeight = Detailgrid.domNode.offsetHeight; inCell.grid.rowHeightChanged(inRowIndex); } } // destroy Detailgrid at inRowIndex function destroyDetailgrid(inRowIndex) { var Detailgrid = dijit.byId(makeDetailgridId(inRowIndex)); if (Detailgrid) Detailgrid.destroy(); } // when user clicks the +/- detailRows = []; function toggleDetail(inIndex, inShow) { if (!inShow) detachDetailgrid(inIndex); detailRows[inIndex] = inShow; grid.updateRow(inIndex); } dojo.addOnLoad(function() { window["grid"] = dijit.byId("grid"); dojo.connect(grid, 'rowRemoved', destroyDetailgrid); }); Test grid

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• Tactics for using PHP in a high-load site

  - by Ross

  Before you answer this I have never developed anything popular enough to attain high server loads. Treat me as (sigh) an alien that has just landed on the planet, albeit one that knows PHP and a few optimisation techniques. I'm developing a tool in PHP that could attain quite a lot of users, if it works out right. However while I'm fully capable of developing the program I'm pretty much clueless when it comes to making something that can deal with huge traffic. So here's a few questions on it (feel free to turn this question into a resource thread as well). Databases At the moment I plan to use the MySQLi features in PHP5. However how should I setup the databases in relation to users and content? Do I actually need multiple databases? At the moment everything's jumbled into one database - although I've been considering spreading user data to one, actual content to another and finally core site content (template masters etc.) to another. My reasoning behind this is that sending queries to different databases will ease up the load on them as one database = 3 load sources. Also would this still be effective if they were all on the same server? Caching I have a template system that is used to build the pages and swap out variables. Master templates are stored in the database and each time a template is called it's cached copy (a html document) is called. At the moment I have two types of variable in these templates - a static var and a dynamic var. Static vars are usually things like page names, the name of the site - things that don't change often; dynamic vars are things that change on each page load. My question on this: Say I have comments on different articles. Which is a better solution: store the simple comment template and render comments (from a DB call) each time the page is loaded or store a cached copy of the comments page as a html page - each time a comment is added/edited/deleted the page is recached. Finally Does anyone have any tips/pointers for running a high load site on PHP. I'm pretty sure it's a workable language to use - Facebook and Yahoo! give it great precedence - but are there any experiences I should watch out for? Thanks, Ross

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