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• Ado.net performance:What does SNIReadSync do?

  - by Beatles1692

  We have a query that takes 2 seconds to run in Sql Server Management Studio but it takes 13 seconds to be shown on a client screen. I used dotTrace to profile my source code and noticed there is this SNIReadSync method (part of ADO.net assemblies)that takes a lot of time to do its job(9 seconds).I ran my source over server so I could omit the network effects and the result was the same. It doesn't matter if I'm using OleDBConnection or SqlConnection. It doesn't matter if I'm using a DataReader or a DataSet. Connection pooling does not solve this issue(as my result shows). I googled this issue and I couldn't find an answer to the question that what this method is actually doing and how we can improve it. here's what I found on StakOverFlow that's not helpful either: http://stackoverflow.com/questions/1610874/snireadsync-executing-between-120-500-ms-for-a-simple-query-what-do-i-look-for

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• Django ORM: Ordering w/ aggregate functions — None special treatment

  - by deno

  Hi, I'm doing query like that: SomeObject.objects.annotate(something=Avg('something')).order_by(something).all() Now, I normally have an aggregate field in my model that I use with Django signals to keep in sync, however in this case perfomance isn't an issue so I thought I'd keep it simple and just use subqueries. This approach, however, presented an unexpected issue: It all works grate if aggregate function results are like this: [5.0, 4.0, 6.0 … (etc, just numbers)] However if you mix in some Nones than it's being ordered like this: [None, 5.0, 4.0 …] The issue is that None has higher value than any number, while it should have value at most of 0. I'm using PostgreSQL and haven't tested w/ other DBs. I haven't actually checked what query is generated etc. I worked it around by just sorting in memory: sorted(…, key=lambda _:_.avg_rating if _.avg_rating is not None else 0) So I'm just curious if you know a way to do it w/ just Django ORM. Perhaps .where? or something… Kind regards

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• Importing AutoCAD/Solidworks drawings/objects into winforms?

  - by Dinoo

  Has anybody done anything like that? I need to import 3d objects, done in either AutoCAD or Solidworks, and draw them into a windows form. I only need the object to be viewed in 3D and moved around - no manipulation required. I am assuming I will need 2 libraries at least, one for a very simple 3D engine, and one to actually get what I need from the CAD/SW files. Autodesk has a SDK available for developing AutoCAD plugins using .NET, but I am not sure if you can use it the other way around - loading files into the .NET app. Any help, links, and ideas are appreciated.

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• XSS attack to bypass htmlspecialchars() function in value attribute

  - by Setzer

  Let's say we have this form, and the possible part for a user to inject malicious code is this below ... <input type=text name=username value=<?php echo htmlspecialchars($_POST['username']); ? ... We can't simply put a tag, or a javascript:alert(); call, because value will be interpreted as a string, and htmlspecialchars filters out the <,,',", so We can't close off the value with quotations. We can use String.fromCode(.....) to get around the quotes, but I still unable to get a simple alert box to pop up. Any ideas?

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• How to calculate an angle from three points?

  - by HelloMoon

  Lets say you have this: P1 = (x=2, y=50) P2 = (x=9, y=40) P3 = (x=5, y=20) Assume that P1 is the center point of a circle. It is always the same. I want the angle that is made up by P2 and P3, or in other words the angle that is next to P1. The inner angle to be precise. It will be always a sharp angle, so less than -90 degrees. I thought: Man, that's simplest geometry maths. But I looked for a formula for like 6 hours now and people talk about most complicated NASA stuff like arcos and vector scalar product stuff. My head feels like in a fridge. Some math gurus here that think this is a simple problem? I think the programing language doesn't matter here but for those who think it does: java and objective-c. need that for both. haven't tagged it for these, though.

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• WPF: Apply ScrollBar Style to ListBox Template - Error object cannot be added to border

  - by TheMar

  Hi, I thought this may be straightforward question but did not find any definitive answer while searching net or SO. I have created scrollbar style (using standard scroll bard template - Blend 2) I am not sure how to apply this style "MyScrollStyle" to a ListBox Template . I saw on ListBox template they have Scroll Viewer -- which should contain the scrollbar Assuming it is something simple as ---Content Added--- After going through lot of xaml in template edit I kind of understood how to apply style. I am trying to add the scroll view style set in this example -http://blog.xamltemplates.net/wp-content/uploads/2008/12/scrollviewer.zip, to my list view template but it gives error -- System.Windows.Markup.XamlParseException was unhandled Message="'ScrollViewer' object cannot be added to 'Border'. Exception has been thrown by the target of an invocation. Error at object 'System.Windows.Controls.ScrollViewer' in markup file 'MenuModule, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null;component/resources/Resources.xaml' Line 19 Position 26." Source="PresentationFramework" LineNumber=19 LinePosition=26 NameContext="1_T" Any help is appreciated Thank you, The Mar

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• NSUserDefaults in monotouch

  - by Ali Shafai

  I'm very impressed with MonoTouch.Dialog by Miguel. inspired by his simple approach I thought it would be very nice to have a reflection based NSUserDefaults class that works seamlessly by marking certain properties as "persistable in user defaults" and forget about the rest. something like this: public class SomeController { [PersistInUserSettings] public string LastPostUserRead { get; set; } } I don't like the LastPostUserRead to be of type "UserSetting", I like it to be a normal property so that later I can assign to it like: LastPostUserRead = "Post 1"; and not like: LastPostUserRead.SetValue("Post 1"); Any idea on how to implement it (without Reflection.Emit) in monotouch?

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• ASP.NET radiobuttonlist onclientclick

  - by Jon

  I've noticed there is no OnClientClick() property for the radiobuttonlist in the ASP.NET control set. Is this a purposeful omissiong on Microsoft's part? Anyway, I've tried to add OnClick to the radio button list like so: For Each li As ListItem In rblSearch.Items li.Attributes.Add("OnClick", "javascript:alert('jon');") Next But alas, it doesn't work. I've even checked the source in firebug, and there is no javascript shown in the radiobuttonlist. Does anyone know how to get this very simple thing working? I'm using ASP.NET control adpaters so don't know if that has anything to do with it. (I wish asp.net/javascript would just work out the box!!!)

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• Authentication settings in IIS Manager versus web.config versus system.serviceModel

  - by Joe

  I'm new to ASP.NET :) I have a WCF web service, and I want to use Basic authentication. I am getting lost in the authentication options: In IIS 6 Manager, I can go in to the properties of the web site and set authentication options. In the web site's web.config file, under system.web, there is an <authentication mode="Windows"/> tag In the web site's web.config file, under system.serviceModel, I can configure: <wsHttpBinding <binding name="MyBinding" <security mode="Transport" <transport clientCredentialType="Basic"/ </security </binding </wsHttpBinding What is the difference between these three? How should each be configured? Some context: I have a simple web site project that contains a single .svc web service, and I want it to use Basic authentication over SSL. (Also, I want it to not use Windows accounts, but maybe that is another question.)

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• $.Ajax send with progress bar using jquery

  - by kamiar3001

  Hi folks I use $.ajax functionality to send data to server and with this method I removed most of postback pages it works but I need some progress bar to show visitors there are some progress now it shows nothing after some second it shows result but i think a message or small picture is need in my web site. How I can implement it with simple jquery code ? something popup and shows the page is in the progress. And also I need to add some other jquery to prevent other click during the progress is it possible ?

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• Making an element unselectable using jQuery

  - by Acorn

  What's the best way to make an element unselectable using jQuery? I know you can use onselectstart="return false;" ondragstart="return false;" in the HTML, but I'm not sure how cross browser compatible that is. I also see someone's made a jQuery plugin: http://plugins.jquery.com/project/Unselectable .. would a plugin like that be necessary? Is there a simple, compatible way to make an element unselectable? The reason for wanting to do this is purely aesthetic. With webpages that have dragging or click events, it's not very nice when things get selected.

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• m2eclipse - after pom and dependencies definition - no libraries on classpath / Maven Dependencies

  - by lisak

  Hi, I've been doing just simple archetype projects until now, and always after dependencies definition and saving pom.xml, immediately after that the Maven Dependencies library was full of libraries. But now I declared: parent(pom packaging, scm, repository management) parent(pom packaging, shared dependencies) actual project (jar packaging, few more dependencies) actual project (jar packaging, few more dependencies) I created them from the upper one by "Create module" ... Problem is, that I can't make it automatically fill the Maven Dependencies library In .classpath file there is this line <classpathentry kind="con" path="org.maven.ide.eclipse.MAVEN2_CLASSPATH_CONTAINER"/> as in other "working" projects, but there is nothing on the classpath. Any suggestions please ?

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• Which programming language is manageable by an 11 year old kid?

  - by tangens

  Possible Duplicates: What is the easiest language to start with? What are some recommended programming resources for pre-teens? My son is 11 years old and he would like to learn a programming language. Of course his primary goal is to develop some (simple) games. Do you know of a programming language that is suitable for this situation? Summary of languages recommended in the answers Snake Wrangling for Kids (answer) Scratch (answer) Small Basic (answer) (answer) Logo NXT-G for Lego Mindstorms (answer) Alice (answer) BlueJ (answer) Squeak Smalltalk (answer) (answer) (answer) Blender Game Engine (answer) PyGame (answer) (answer) (answer) Inform (answer) Phrogram (answer) Dr Scheme (answer) eToys (answer) runrev (answer) Karel Programming (answer) Hackety Hack (answer) Visual Basic (answer) (answer) Learn to Program (answer) QBasic (answer) (answer) Visual Basic Express (answer) Processing (answer) C# (answer) JavaScript (answer) (answer) Ruby (answer) ToonTalk (answer) Flash and ActionScript (answer) StarLogo (answer) Java (answer) Kodu (answer) XNA (answer) (answer) unity3D (answer) BlitzBasic (answer)(answer) Lua (answer)

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• Asynchronous Html.ImageGetter for setting multiple images in a TextView

  - by thedude19

  I'm writing an application that takes HTML pages and parses them to display on the screen. Specifically, this application pulls HTML from a message board and lists posts made by users. The problem is that a lot of the content in posts are pictures in <img> tags, so I need to write a Html.ImageGetter to handle the downloading of the images. My textView.setText() method will look like this: myTextView.setText(Html.fromHtml(myText, new ImageGetter() { @Override public Drawable getDrawable(String source) { Drawable d; // Need to async download image here return d; } }, null)); Doing this synchronously is trivial, but is there a suggested way to do this asynchronously so that it doesn't lock up my UI thread? I would also like to eventually build in caching of these images, but I imagine that would be pretty simple once the async downloading was there.

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• jqGrid "Loading..." overlay showing "undefined" though grid is working

  - by gurun8

  I have a jqGrid that's working 100% except that it keeps displaying "undefined" in the "Loading..." overlay. I can't really figure it out. It seems like I should only get the "undefined" message if something isn't set right and the grid would cease to work. But that's not the case. scratches head I'm not really sure a code sample would help here, but if anyone would like to see a certain part of my code let me know and I'll included. Has anyone else come across this issue before? I'm probably missing something so simple and small that I can't see it. So my apologies in advance if this is a no-brainer Thanks for your help.

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• ExternalInterface in flex calling javascript function works for mozilla/chrome but NOT IE

  - by Rees

  hello, i have a flex application that does a simple ExternalInterface.call("shareOptions"), which calls a shareOptions() javascript method and works absolutely fine with Mozilla and chrome, however when I test with IE i get the following error: Error: [object Error] at flash.external::ExternalInterface$/_toAS() at flash.external::ExternalInterface$/call() I looked at the adobe livedocs documentation but can't determine what the issue is with IE. is there something i'm missing?? if anyone knows, please let me know ASAP! thanks in advance. private function shareOptions(event:MouseEvent):void{ ExternalInterface.marshallExceptions = true; if (ExternalInterface.available){ ExternalInterface.call("shareOptions"); } } the javascript <script language="JavaScript" type="text/javascript"> function shareOptions() { myWin = window.open('http://www.mysite.shareOptions.php','yeee!','width=640,height=690,toolbar=no,location=0,directories=no,status=no,menubar=no,scrollbars=no,copyhistory=no,resizable=yes,x=500,y=500'); myWin.moveTo(300,300); } </script>

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• Changing ActiveRecord attribute value in before_save hook

  - by fifigyuri

  I needed to fix the encoding of an ActiveRecord attribute and decided to do it in a before_save hook. And at this point I noticed an unexpected feature. When I wanted to change the value of the attribute, simple using the attribute_name=XY did not work as I expected. Instead of that I needed to use self[:attribute_name]=XY. So far did not recognise this behaviour and I used AR.attribute_name=XY. What is the reason for this? Does this behaviour relate to the hook or something else? Thanks for explanation.

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• insert and modify a record in an entity using Core Data

  - by aminfar

  I tried to find the answer of my question on the internet, but I could not. I have a simple entity in Core data that has a Value attribute (that is integer) and a Date attribute. I want to define two methods in my .m file. First method is the ADD method. It takes two arguments: an integer value (entered by user in UI) and a date (current date by default). and then insert a record into the entity based on the arguments. Second method is like an increment method. It uses the Date as a key to find a record and then increment the integer value of that record. I don't know how to write these methods. (assume that we have an Array Controller for the table in the xib file)

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• PHP explode not filling in array spot 0

  - by Billy Winterhouse

  I have a file we will call info.txt under UNIX format that has only the following in it: #Dogs #Cats #Birds #Rabbits and am running this against it: $filename = "info.txt"; $fd = fopen ($filename, "r"); $contents = fread ($fd,filesize ($filename)); fclose ($fd); $delimiter = "#"; $insideContent = explode($delimiter, $contents); Now everything looks to be working fine except when I display the array I get the following. [0] => [1] => Dogs [2] => Cats [3] => Birds [4] => Rabbits I checked the .txt file to make sure there wasn't any space or hidden characters in front of the first # so I'm at a loss of why this is happening other than I feel like I'm missing something terribly simple. Any ideas? Thanks in advanced!

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• Cross-platform embedded database/key-value store for C#

  - by Arne Claassen

  I'm looking for a fast, embeddable key/value store with cursor semantics over key collections (or a simple embeddable DB) that I can use in .NET and mono. Need it to be open-source, would prefer an MIT or Apache style license over a GPL license. Not opposed to a library that needs bindings to be written, as long as binaries are available for both windows and linux. Options considered: SQLite - has bindings and native implementation, but single-threaded and not all that fast Embedded InnoDB - no .NET bindings i can find and it's GPLv2 Berkley DB - no .NET bindings i can find Tokyo Cabinet - no .NET bindings i can find and problematic to build on windows MadCow Memory-mapped data structures - GPLv2 Is there an option better than the above that i'm missing, or bindings for the above i don't know about?

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• Modify the Event Log Source name for an SSIS package

  - by Paul Kohler

  I have an SQL Server integration Services (SSIS) package using the standard Event Log provider (yes, the event log! I know we can use SQL etc...) The default "Source" of the log events is "SQLISPackage100" but I want it to be something like "AppName" so that the errors are more visible between the different packages when viewing the event log (also for MOM use). Event Type: Error Event Source: SQLISPackage100 Event Category: None ... Description: Package "Foo" failed. I hope the answer is simple, I simply cannot find it, but does anyone know how to change the text of the Event Log Source name to something more meaningful? PK :-)

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• How to best develop web crawlers

  - by Fernando Barrocal

  Heyall, I am used to create some crawlers to compile information and as I come to a website I need the info I start a new crawler specific for that site, using shell scripts most of the time and sometime PHP. The way I do is with a simple for to iterate for the page list, a wget do download it and sed, tr, awk or other utilities to clean the page and grab the specific info I need. All the process takes some time depending on the site and more to download all pages. And I often steps into an AJAX site that complicates everything I was wondering if there is better ways to do that, faster ways or even some applications or languages to help such work.

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• iPhone first responders

  - by William Jockusch

  I am confused about the iPhone responder chain. Specifically, in the iPhone event handling guide http://developer.apple.com/iPhone/library/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/EventHandling/EventHandling.html, we have the following: The first responder is the responder object in an application (usually a UIView object) that is designated to be the first recipient of events other than touch events. But UIView is a subclass of UIResponder. And the UIResponder class reference says this: - (BOOL)canBecomeFirstResponder Return Value YES if the receiver can become the first responder, NO otherwise. Discussion Returns NO by default. If a responder object returns YES from this method, it becomes the first responder and can receive touch events and action messages. Subclasses must override this method to be able to become first responder. I am confused by the apparent contradiction. Can anyone clear it up for me? For what it's worth, I did set up a simple view-based application, and call canBecomeFirstResponder and isFirstResponder on its view. Both returned NO.

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• MVC Authorize Attribute + HttpUnauthorizedResult + FormsAuthentication

  - by Anthony

  After browsing the MVC section on CodePlex I noticed that the [Authorize] attribute in MVC returns a HttpUnauthorizedResult() when authorization fails (codeplex AuthorizeAttribute class). In the source of HttpUnauthorizedResult() from CodePlex is the code (I'm not allowed to enter another URL as my rep isn't high enough, but replace the numbers on the URL above with 22929#266476): // 401 is the HTTP status code for unauthorized access - setting this // will cause the active authentication module to execute its default // unauthorized handler context.HttpContext.Response.StatusCode = 401; In particular, the comment describes the authentication module's default unauthorized handler. I can't seem to find any information on this default unauthorized handler. In particular, I'm not using FormsAuthentication and when authorization fails I get an ugly IIS 401 error page. Does anyone know about this default unauthorized handler, and in particular how FormsAuthentication hooks itself in to override it? I'm writing a really simple app for my football team who confirm or deny whether they can play a particular match. If I enable FormsAuthentication in the web.config the redirect works, but I'm not using FormsAuthentication and I'd like to know if there's a workaround.

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• jQuery datepicker causes page overflow

  - by nc3b

  I am using the datepicker control from jQuery-ui 1.8. from-date is a text input. I am attaching a very simple datepicker: $('#from-date').datepicker(); This causes the page to overflow (vertical scrollbar), which I am trying to avoid. As soon as I click the from-date, the datepicker control appears, and the scrollbar dissapears. After dismissing the datepicker, the scrollbar doesn't appear anymore. The text field is inside a div that has overflow:auto and a fixed height and width. I suspect it's a z-index issue. What am I doing wrong ? How would I debug this ?

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