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• Can I use a class as an object in C# to create instances of that class?

  - by Troy

  I'm writing a fairly uncomplicated program which can "connect" to several different types of data sources including text files and various databases. I've decided to implement each of these connection types as a class inherited from an interface I called iConnection. So, for example, I have TextConnection, MySQLConnection, &c... as classes. In another static class I've got a dictionary with human-readable names for these connections as keys. For the value of each dictionary entry, I want the class itself. That way, I can do things like: newConnection = new dict[connectionTypeString](); Is there a way to do something like this? I'm fairly new to C# so I'd appreciate any help.

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• PHP exec() on windows not working

  - by Rich Harrington

  Hey, I'm trying to execute a program on windows through PHP, the command is posted below. This doesn't seem to be running through the script at all, even though it works when the command is manually entered into the command prompt. exec('C:\\ffmpeg -i ' . $movedfile . ' -acodec aac -ab 128k -vcodec libx264 -fpre C:\\ffmpeg\\share\\ffmpeg\\libx264-hq.ffpreset -crf 22 -threads 0 -wpredp 0' . $convertedfile); Any suggestions? Thanks! EDIT: There are two slashes for path seperators, stack overflow only displays one though

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• Basic Boost Regex question

  - by shuttle87

  I'm trying to write some c++ code that tests if a string is in a particular format. In this program there is a height followed by some decimal numbers: for example "height 123.45" or "height 12" would return true but "SomeOtherString 123.45" would return false. My first attempt at this was to write the following: string action; cin >> action; boost::regex EXPR( "^height \\d*(\\.\\d{1,2})?$/" ) ;//height format regex bool height_format_matches = boost::regex_match( action, EXPR ) ; if(height_format_matches==true){ \\do some stuff } However height_format_matches never seemed to be true. Any help is greatly appreciated!

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• Sublime Text 2 Keyboard shortcut to open file in Chrome/firefox in windows

  - by samdroid

  I followed the instruction for windows 7 to setup chrome. No luck! { "cmd":["C:\Program Files (x86)\Google\Chrome\Application", "$C:\Users\gmu\Desktop\June_15_2012"] } after entering the file location/path under what format should I have to save. I am a noobie. sorry to ask this question. Anything helps! If I press f7 getting the following message Error trying to parse build system: Invalid escape in C:\Users\gmu\AppData\Roaming\Sublime Text2\Packages\User\Chrome.sublime-build:2:9 Thanks

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• What is the fastest way to send 100,000 HTTP requests in Python?

  - by Igor G.

  Hello, I am opening a file which has 100,000 url's. I need to send an http request to each url and print the status code. I am using Python 2.6, and so far looked at the many confusing ways Python implements threading/concurrency. I have even looked at the python concurrence library, but cannot figure out how to write this program correctly. Has anyone come across a similar problem? I guess generally I need to know how to perform thousands of tasks in Python as fast as possible - I suppose that means 'concurrently'. Thank you, Igor

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• Show number of results in each "filter item"

  - by Roberto

  Hi ! How can i get the number of each filter item in a seach? Example... im doing a job/resumes portal... i seach a job title and i have some filters items like City, State , area and etc... How can i show the number of each filter in the select box example Contry: Brazil(22 results), USA(61 results) Here a url with a sample: http://www.manager.com.br/resumes/resumes_result.php?&search_table=resumes&tipo_local=0&keyword=program& Tkz Roberto

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• How does Garbage Collection in Java work?

  - by Bright010957

  I was wondering how the garbage collector in Java deals with the following situation. Object A has a reference to Object B and Object B has a reference to Object C. The main program has a reference to Object A. So you can use Object B trough Object A, and Object C trough Object B trough Object A. What happens to Object B and Object C, if the link between Object A and Object B is set to null? Should Object B and Object C now been collected by the Garbage Collector? I mean there is still a connection between Object B and Object C.

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• iPhone - strange error when testing on simulator

  - by lostInTransit

  Hi I was testing my app on the simulator when it crashed on clicking a button of a UIAlertView. I stopped debugging there, made some changes to the code and built the app again. Now when I run the application, I get this error in the console Couldn't register com.myApp.debug with the bootstrap server. Error: unknown error code. This generally means that another instance of this process was already running or is hung in the debugger.Program received signal: “SIGABRT”. I tried removing the app from the simulator, doing a clean build but I still get this error when I try to run the app. Can someone please let me know what I should do to be able to run the app on my simulator again. Thanks.

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• How do I create an Access 2003 MDE programmatically or by command line in Access 2007?

  - by Ned Ryerson

  I have a legacy Access 2003 database file that must remain in that format to preserve its menus and toolbars. I have recently moved to Access 2007 in my build environment and will be deploying the compiled Access 2003 program with the Access 2007 runtime. In Access 2003, I could script the process of creating an MDE with the Access Developer Extensions (WZADE.mde) using the command line and an .xml file of build preferences (without creating an install package). The Access 2007 developer extensions do not seem to offer a similar option. I can "Package a Solution", but it creates an accdr and buries it in a CD installer. I've tried programmatic options like Docmd.RunCommand acMakeMDEFILe and Syscmd(603, mdbpath, mdepath) but they no longer work in Access 2007. Of course, i can manually create an MDE using Database ToolsCreate MDE, but that is no scriptable as far as I can tell.

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• pdb show different variable values than print statements

  - by martin

  Hi, everyone. I am debugging a python module with homemade c extensions. The output seems correct when I print it with 'p' in pdb. But if I use a normal print statement or pickle it, the output is wrong. What could be causing pdb to show different values than normal execution? I can even step to the print statement in debug mode, and pdb will show the correct value but the program will print the wrong one. The problem seems to happen only when I have called a certain c extension earlier. Glad to post code if that helps. Thank you.

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• Pair programming tools that are not remote

  - by JonathanTech

  I am currently in a job where we practice serious pair programming on windows machines. We both have a set of keyboards, mice, and we have two monitors, which works well for switching who's the driver really easy, but there are some points in the session that I would like to start writing tests at the same time that my pair is writing implementation. I am wondering if there is any program that would allow me to have effectively two cursors and keyboard focuses on the same computer. If they don't exist then I am willing to experiment with my own solution, but I would like input as to how to best accomplish this. I am most familiar with .Net 3.5 technologies, but I also know Java and am willing to learn C++ to solve this problem. If I was creating the solution myself I would go down the road of being able to grab the input of one hardware device (i.e. a specific mouse that's installed) and prevent Windows from moving the pointer, and instead move my own programs pointer independently.

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• A report writer for non-programmers?

  - by Earlz

  Hello, we are wanting for users to be able to write their own reports in our application. It is a web application. We don't care if they must download an application in order to create reports, but we need for them to be able to print off reports from the web in PDF format or similar. The report writer is to be used by non-programmers, or at best very light programmers(like the ones that make VBA macros and such). (the writer is not a core part of the program though. So if there is a learning curve, then that is acceptable to a certain extent) We were looking at Crystal Reports but it seems like it'll cost $7000 which is just way too much for right now(though our system is very flexible so could support it eventually). We are also looking at Fast Reports which seems pretty promising, but I'm not sure the report writer would be easy for non-programmers to grasp. Can someone recommend a good report writer for non programmers that won't break the bank?

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• Resizing JPEG image during decoding

  - by Thomas

  I'm working on a program that creates thumbnails of JPEG images on the fly. Now I was thinking: since a JPEG image is built from 8x8-pixel blocks (Wikipedia has a great explanation), would it be possible to skip part of the decoding? Let's say that my thumbnails are at least 8 times smaller than the original image. We could then map each 8x8 block in the input file to 1 pixel in the decoding output, by including only the constant term of the discrete cosine transform. Most of the image data can be discarded right away, and need not be processed. Moreover, the memory usage is reduced by a factor of 64. I don't want to implement this from scratch; that'll easily take a week. Is there any code out there that can do this? If not, is this because this approach isn't worthwhile, or simply because nobody has thought of it yet?

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• Mono mkbundle issue

  - by Sean

  Hello, I am trying to bundle mono runtime with a C# a simple (console) program that does nothing, but 'hello world'. Got Cygwin, configured it all, though it fails: $ mkbundle -o x2 x.exe --deps -z OS is: Windows Sources: 1 Auto-dependencies: True embedding: C:\cygwin\home\Sean\x.exe compression ratio: 31.71% embedding: C:\PROGRA~2\MONO-2~1.1\lib\mono\4.0\mscorlib.dll compression ratio: 34.68% Compiling: as -o temp.o temp.s gcc -mno-cygwin -g -o x2 -Wall temp.c `pkg-config --cflags --libs mono-2|dos2unix` -lz temp.o temp.c: In function `main': temp.c:173: warning: implicit declaration of function `g_utf16_to_utf8' temp.c:173: warning: assignment makes pointer from integer without a cast temp.c:188: warning: assignment makes pointer from integer without a cast /tmp/ccu8fTcQ.o: In function `main': /home/Sean/temp.c:173: undefined reference to `_g_utf16_to_utf8' /home/Sean/temp.c:188: undefined reference to `_g_utf16_to_utf8' collect2: ld returned 1 exit status [Fail] Tried post with similar problem to mine here, but it didn't work either. My configuration: Windows 7 64bit Mono 2.8.1 Latest Cygwin Not sure what's the story here. Help appreciated.

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• GDB doesnt like my typedef

  - by yan bellavance

  It seems that the following is to deep for the debugger in Qt even though the program uses it without problem typedef QMap <int, QStringList> day2FileNameType; typedef QMap <int, day2FileNameType> month2day2FileNameType; typedef QMap <int, month2day2FileNameType> year2month2day2FileNameType; year2month2day2FileNameType y2m2d2f; now the first 2 typeDefs work okay with the debugger but the third one retrieving data for watch view (over 100 pending request) Is it wrong for me to try and use such a typedef as year2month2day2FileNameType?

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• How to prevent Excel from wanting to start in Safe Mode?

  - by paulland

  We have a background process that calls Excel for generation of report spreadsheets. Occasionally, a crash or inadvertent server reboot will occur while Excel is running. The first launch of Excel after the restart brings up the dialog box (paraphrasing here) "Would you like to start Excel in safe mode?" (Yes/No) The issue is that our background app can't handle this dialog box, and acts as if Excel will not start properly, and the background jobs fail as a result. I can find CL switches for starting Excel in safe mode, but I can't find anything that will instruct Excel to always start in normal mode without that prompt dialog. (I don't have access to the other program's code, so I can't make it pass through a "Yes" value if it runs into that box.) Is there a registry hack or some other way I can force Excel into normal mode every time it's called?

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• Double interpolation of regular expressions in Perl

  - by tomdee

  I have a Perl program that stores regular expressions in configuration files. They are in the form: regex = ^/d+$ Elsewhere, the regex gets parsed from the file and stored in a variable - $regex. I then use the variable when checking the regex, e.g. $lValid = ($valuetocheck =~ /$regex/); I want to be able to include perl variables in the config file, e.g. regex = ^\d+$stored_regex$ But I can't work out how to do it. When regular expressions are parsed by Perl they get interpreted twice. First the variables are expanded, and then the the regular expression itself is parsed. What I need is a three stage process: First interpolate $regex, then interpolate the variables it contains and then parse the resulting regular expression. Both the first two interpolations need to be "regular expression aware". e.g. they should know that the string contain $ as an anchor etc... Any ideas?

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• get site source code as register user(c#)

  - by nir143

  hi. i downloaded a sourcecode of a site,but i downloaded it i saw it identify my program as a guest,i search at google and figure out that i can send a cookie when i "ask" the source code. that what i have managed to do and it still dont identify me as register user: CookieContainer cj = new; CookieContainer(); string all = ""; HttpWebRequest req = (HttpWebRequest)WebRequest.Create(Url); req.CookieContainer = cj; HttpWebResponse res = (HttpWebResponse)req.GetResponse(); CookieCollection cs=cj.GetCookies(req.RequestUri); CookieContainer cc = new CookieContainer(); cc.Add(cs); req.CookieContainer = cc; StreamReader read = new StreamReader(res.GetResponseStream()); all = read.ReadToEnd(); read.Close(); return all; what is wrong here? tyvm for help:)

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• Serial Mac OS X constantly freezes/locks/dissappears for USB to Arduino

  - by Niraj D

  I have a problem with my C++ code running in Xcode with both the AMSerial library as well as the generic C (ioctl, termios). After a fresh restart, my application works well but after I "kill" the program the Serial (I think) is not released. I have checked my open files under /dev and have killed the connection to serial USB from there, but my C++ still can't open the USB port. I have narrowed this down to being a low level Mac OS X issue, regarding blocking the port indefinitely, regardless of closing it using the aforementioned libraries. Just for context, I'm trying to send numbers through my USB port, serially to an Arduino Duemilanove at 9600 baud. Running Serial Monitor in Arduino is perfectly fine, however, running through a C++ application it freezes up my computer, occasionally, my mouse/keyboard freeze up: requiring a hard reset. How can this problem be fixed? It seems like Mac OS X is not USB friendly!

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• WPF DataGridTextColumn Can't type point for float data

  - by Alvin

  I had a WPF DataGrid and use DataGridTextColumn Binding to a Collection. The items in Collection had some float property. When my program launched, I modify the value of float property in DataGrid, if I type a integer value, it works well. But if I type char . for a float value, char . can't be typed. I had to type all the numbers first, and then jump to the . position to type char . to finish my input. So how can I type . in my situation? Thanks.

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• Using TCPDF and FPDI with cake php

  - by kwhohasamullet

  Hi Guys, I have go TCPDF setup in my cake php install and am now trying to also use FPDI with it as i need to add a PDF to the start of the PDF that is being generated. WHen trying to do this i am using 3 classes XTCPDF which holds my header data FPDI - FPDI class TCPDF - TCPDF class and it is setup as so: XTCPDF extends FPDI FPDI extends TCPDF When i try and generate a PDF with this using commands from teh FPDI classs i get the following error: Fatal error: Cannot access protected property XTCPDF::$PDFVersion in C:\Program Files\XAMPP\xampp\htdocs\quote\app\vendors\fpdi\fpdi_pdf_parser.php on line 388 Im thinking this may be a scope problem but im not too sure, i have also tested by changing it around to not include XTCPDF class but the same error occurs, EDIT: The code that i am using that accesses the FPDI class is: $tcpdf->setSourceFile(APP.'webroot'.DS.'img'.DS.'pdf'.DS.'front_cover.pdf'); $frontCover = $tcpdf->importPage(1); $tcpdf->useTemplate($frontCover); Thanks in advance for any help :D

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• WinForms Taskbar Icon - Click Event not firing

  - by Greycrow

  I have created a non-form c# program that uses the NotifyIcon class. The text "(Click to Activate)" shows up when I hover the mouse. So I am getting some events handled. However, The "Click" event does not fire and the Context menu doesnt show up. public class CTNotify { static NotifyIcon CTicon = new NotifyIcon(); static ContextMenu contextMenu = new ContextMenu(); static void Main() { //Add a notify Icon CTicon.Icon = new Icon("CTicon.ico"); CTicon.Text = "(Click to Activate)"; CTicon.Visible = true; CTicon.Click += new System.EventHandler(CTicon_Click); //Create a context menu for the notify icon contextMenu.MenuItems.Add("E&xit"); //Attach context menu to icon CTicon.ContextMenu = contextMenu; while (true) //Infinite Loop { Thread.Sleep(300); //wait } } private static void CTicon_Click(object sender, System.EventArgs e) { MessageBox.Show("Clicked!"); } }

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• ListView FocusedItem Becomes NULL

  - by Andy and Tyler

  When the program runs, there is a series of ListView forms. We populated one of them with items (as strings) and we check whether the state of selection has changed. Once it's changed, we grab the text of the selected item using FocusedItem.Text. The first time works just fine but when another selection is made, the selected item returns as null. The only way we can temporarily get around this issue is to clear and repopulate the form. The disadvantage is that we lose the highlighted item. There got to be another way around this. Maybe we're not clear on how ListView really works? Any ideas?

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• Storing file permissions in Subversion repository

  - by graham.reeds

  How do you store file permissions in a repository? A few files need to be read-only to stop a third party program from trashing it but after checking out of the repository they are set to read-write. I looked on google and found a blog post from 2005 that states that Subversion doesn't store file-permissions. There are patches and hook-scripts listed (only one url still exists). Three years later does Subversion still not store file permissions and are hooks the only way to go about this? (I've never done hooks and rather use something that is native to Subversion.)

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• Sql Server CE - Temporary disable auto increment on a specific collum

  - by Fábio Antunes

  Hi guys. I have this little question, thats been on my head for while now. Here it goes: Is it possible to temporary disable the Auto_Increment on the collum ID. So that i can add a new row to the table and being able specify the ID value when inserting the row. And then in the end enable the Auto_Increment again, and let do its work as usual? And if its possible how can i do it. The Table structure is very simple Collum Name (atributes) ID (Primary Key, Auto Increment, int, not null) Name (nvarchar(100), not null) Notice: The table name is: People. Lets also consider that the table already has data and cannot be changed. The database server is SQL Server CE. The SQL commands will be executed in a C# program, if its of any help. I really hope its possible, it would come very handy. Thanks

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