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  • Cross-thread operation not valid: Control accessed from a thread other than the thread it was create

    - by SilverHorse
    I have a scenario. (Windows Forms, C#, .NET) There is a main form which hosts some user control. The user control does some heavy data operation, such that if I directly call the Usercontrol_Load method the UI become nonresponsive for the duration for load method execution. To overcome this I load data on different thread (trying to change existing code as little as I can) I used a background worker thread which will be loading the data and when done will notify the application that it has done its work. Now came a real problem. All the UI (main form and its child usercontrols) was created on the primary main thread. In the LOAD method of the usercontrol I'm fetching data based on the values of some control (like textbox) on userControl. The pseudocode would look like this: //CODE 1 UserContrl1_LOadDataMethod() { if(textbox1.text=="MyName") <<======this gives exception { //Load data corresponding to "MyName". //Populate a globale variable List<string> which will be binded to grid at some later stage. } } The Exception it gave was Cross-thread operation not valid: Control accessed from a thread other than the thread it was created on. To know more about this I did some googling and a suggestion came up like using the following code //CODE 2 UserContrl1_LOadDataMethod() { if(InvokeRequired) // Line #1 { this.Invoke(new MethodInvoker(UserContrl1_LOadDataMethod)); return; } if(textbox1.text=="MyName") //<<======Now it wont give exception** { //Load data correspondin to "MyName" //Populate a globale variable List<string> which will be binded to grid at some later stage } } BUT BUT BUT... it seems I'm back to square one. The Application again become nonresponsive. It seems to be due to the execution of line #1 if condition. The loading task is again done by the parent thread and not the third that I spawned. I don't know whether I perceived this right or wrong. I'm new to threading. How do I resolve this and also what is the effect of execution of Line#1 if block? The situation is this: I want to load data into a global variable based on the value of a control. I don't want to change the value of a control from the child thread. I'm not going to do it ever from a child thread. So only accessing the value so that the corresponding data can be fetched from the database.

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  • non-static method cannot be referenced from a static context

    - by Mith
    I am modifying the source code here: http://thinkandroid.wordpress.com/2009/12/30/getting-response-body-of-httpresponse/ I get this error: non-static method getContentCharSet(org.apache.http.HttpEntity) cannot be referenced from a static context String charset = getContentCharSet(entity); This error is line 13 on the second box. Any ideas? I have been really struggling with this code :-(

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  • Eclipse CDT -- How to map Linux path's to Windows paths?

    - by SiegeX
    We have a C-code project written for a Linux environment but we also want the ability to view and edit the code on Eclipse for Windows and have the headers be resolved. The problem we are facing is that a lot of the headers are included with absolute paths in the Linux format such as: #include /path/to/custom/header.h What I would like to be able to do is have Eclipse CDT map /path/to/custom/ to C:\path\to\custom. Is this possible?

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  • JQuery: How do you use live with the post function

    - by Luke101
    When load the new html from a post function I lose all of my click bindings. I read that i could use live to keep all the bindings but can't find any examples where live is used with post. Here is my code: var AddGroup = function (Obj) { $('.Selectiontarget').live('post', function () { $.post('/List/AddGroupItem?ListID=' + Obj, function (data) { $('.Selectiontarget').html(data); }); }); } When I run this code I lose all of my click bindings.

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  • C# Copying instance variable to local variable in functions of same class

    - by NickLarsen
    I have been looking through some code on an open source project recently and found many occurrences of this kind of code: class SomeClass { private int SomeNumber = 42; public ReturnValue UseSomeNumber(...) { int someNumberCopy = this.SomeNumber; if (someNumberCopy > ...) { // ... do some work with someNumberCopy } else { // ... do something else with someNumberCopy } } } Is there any real benefit to making a copy of the instance variable?

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  • PHP Doctrine: generation problem?

    - by ropstah
    I'm generating models from my Mysql db. It generates a foreign key collection properly, but not the other way around... Is this supposed to be 'by-design', or am i doing something wrong? pseudo code alert User: UserId pk LocationId fk //User location Location LocationId pk UserId fk //Location owner Generated code: class User() { hasMany('Location') //for locations owned by the user //BUT NOT THIS ONE: //hasOne('Location_1') //for current location of user } class Location() { hasMany('User') //for users which are on that location //AND NOT THIS ONE //hasOne('User_1') //for location owner }

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  • What JavaScript object copy function works with greasemonkey?

    - by Geo
    I know there is another question related to copying objects in JavaScript here, but the code they provide does not work with greasemonkey. From what I was able to trace, the code for the accepted answer dies/ stops at the line : var temp = new obj.constructor(); Is there any way to see what went wrong ? It's not really necessary I use the same function for the object copying, but I would like something that works. Do you know some function?

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  • JS and Rails site wide announcements

    - by pcasa
    Tried doing http://davidwparker.com/2008/09/17/site-wide-announcements-in-rails-using-jquery-jgrowl/ Am really bad with JS. Think I am messing up on the last part where it says "This code goes in your application.js file (somewhere in $(function){ //here })" Am I not suppose to do a link_to_function and create a function with this code that references that link? Really lost on this one.

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  • Best document format for addressbook in CouchDB

    - by 2x2p1p
    Hi guys. I really tried, tried so hard but i cant understand couchdb :( I must record the contact of several people, should i put every contact in a single document ? codeviewer.org/view/code:df8 Or in different documents ? codeviewer.org/view/code:df9 I confused, can somebody help me ? Thanks.

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  • Visual Studio 2010 Professional - Problem Unit-Testing Web Services

    - by Ben
    Have created a very simple Web Service (asmx) in Visual Studio 2010 Professional, and am trying to use the auto-generated unit test cases. I get something that seems quite familiar on this site: The web site could not be configured correctly; getting ASP.NET process information failed. Requesting http://localhost:81/zfp/VSEnterpriseHelper.axd return an error: The remote server returned an error: (500) Internal Server Error. http://stackoverflow.com/questions/260432/500-error-running-visual-studio-asp-net-unit-test I have tried: 1. Running the tests on IIS rather than ASP.NET Development Server 2. Adding and then removing the XML fragment to my Web Service's .config file 3. Giving the MACHINE\ASPNET account Full control to the local folder My current questions: 1. Why am I being bothered with this instrumentation / code coverage DLL, when this doesn't seem to be something that ships with Visual Studio 2010 Professional? Is there any way I can turn it off? 2. I'm placing the node under in Web.config - is that the correct node? 3. Is it possible to bind to a web service without using the webby test attributes? I've seen other people advising making the Web Service as light-weight as possible. I'm trying to call it with jQuery / AJAX / JSON, so being able to debug the actual web service would be really helpful. Best wishes, Ben

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  • filter some data(row) in zend view

    - by Behrang
    I have 1.Table:user(userId,userName,userGroup) 2.Model:userModel 3.usercontroller there i a simple code: Controller: class UserController extends Zend_Controller_Action { public function getuser() { $userModel = new userModel(); $this-view-usergroup = $userModel; } } Model: class Model_UserGroupModel extends Zend_Db_Table_Abstract { public function getuser( { $select = $this-select(); return $this-fetchAll($select); } } view: please tell me what code I must insert in view to only have user with specific row like user with group teacher also i use partialoop???

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  • EntryPointNotFoundException when using TaskDialog in C#.

    - by horsedrowner
    I'm using the following code to call a TaskDialog. [DllImport("ComCtl32", CharSet = CharSet.Unicode, PreserveSig = false)] internal static extern void TaskDialogIndirect( [In] ref TASKDIALOGCONFIG pTaskConfig, [Out] out int pnButton, [Out] out int pnRadioButton, [Out] out bool pfVerificationFlagChecked); However, I get the exception "Unable to find an entry point named 'TaskDialogIndirect' in DLL 'ComCtl32'." I took this code. I am using Windows 7 x64 (RC). What am I doing wrong?

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  • missing rake tasks ??

    - by richard moss
    hi I have ran gem install rails and am running 2.3.4 but i am missing some rake tasks like 'db' and 'gems' if i run rake -T i get the following tasks. How can i get all the others ? rake apache2 # Build Apache 2 module rake clean # Remove compiled files rake clobber # Remove all generated files rake default # Build everything rake doc # Generate all documentation rake doxygen # Generate Doxygen C++ API documentation if ... rake doxygen:clobber # Remove generated Doxygen C++ API documenta... rake doxygen:force # Force generation of Doxygen C++ API docume... rake fakeroot # Create a fakeroot, useful for building nat... rake nginx # Build Nginx helper server rake package # Build all the packages rake package:clean # Remove package products rake package:debian # Create a Debian package rake package:force # Force a rebuild of the package files rake package:gem # Build the gem file passenger-2.2.4.gem rake rdoc # Build the rdoc HTML Files rake rdoc:clobber # Remove rdoc products rake rdoc:force # Force a rebuild of the RDOC files rake sloccount # Run 'sloccount' to see how much code Passe... rake test # Run all unit tests and integration tests rake test:cxx # Run unit tests for the Apache 2 and Nginx ... rake test:integration # Run all integration tests rake test:integration:apache2 # Run Apache 2 integration tests rake test:integration:nginx # Run Nginx integration tests rake test:oxt # Run unit tests for the OXT library rake test:rcov # Run coverage tests for the Ruby libraries rake test:restart # Run the 'restart' integration test infinit... rake test:ruby If anyone knows why this has happened, how i can fix it or anything else that could help, please let me know thanks alot rick

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  • Unable to Use Bluetooth Mighty Mouse or Wireless Keyboard with Boot Camp

    - by Kristopher Johnson
    I have Windows 7 64-bit running on a MacBook Pro in a Boot Camp partition. I am trying to pair with my Bluetooth Mighty Mouse and Apple wireless keyboard under Windows, but whenever I try to do so, here's what happens: While on the Add a device window, I turn on the mouse or press a key on the keyboard, and the mouse or keyboard shows up in the list of available devices. I click the device and then the Next button, and the window displays Connecting to device... Time passes. Eventually, I get this error message: Adding this device to this computer failed Adding the device failed resulting in an unknown error. The reported error code is 0x80070015. Contact your device manufacturer for assistance. I've run Windows Update and Apple Software Update. I've also tried reinstalling the drivers from the Snow Leopard DVD. The mouse and keyboard both work fine when I boot into Mac OS X. FWIW, after many, many repeated tries, I eventually got it to work. I don't know why. So while my problem is solved, I'd still like to get an "answer" as to why trial-and-error seems to be the only approach. The keyboard, in particular, was hard to get set up. A few times, Windows would apparently recognize it and prompt me to enter the pairing code, but then it would time out after a couple of seconds (not long enough to enter the code). Grrrr.

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  • [Python]Download an image embedded in a mime multipart message

    - by michele
    Hi, I have to download some images from links. This links return me a file where is embedded a multipart mime and a tiff image. I have writed this code but it downloads the file with mime. How I can remove the mime from this file and have the image returned? Can I do this with wget or curl? My code: def download(url,local): import urllib urllib.urlretrieve(url,local) urllib.urlcleanup() Thanks a lot.

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  • Javascript obfuscation and extreme situation in production solving

    - by faya
    Hello, I have a few questions regarding JavaScript obfuscation on client side. First question: What is the best tool or best three tools which ones you could suggest for this operation? Second question: How developers should debug such code (in example with firebug) when extreme situation appears in the production if the code is obfuscated? P.S. - I know that it's bad practice to debug in production, but we had some emergencies and experienced sometimes such situations. Thanks for any help!

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  • What is faster with PictureBox? Many small redraws or complete redraw.

    - by kornelijepetak
    I have a PictureBox (WinMobile 6 WinForm) on which I draw some images. There is a background image that goes in the background and it does not change. However objects that are drawn on the picturebox are moving during the application so I need to refresh the background. Since items that are redrawn fill from 50% to 80% of the surface, the question is which of the two is faster: 1) Redraw only parts of the background image that have been changed (previous+next location of the moving object). 2) Redraw complete background and then draw all the objects in their current position. Now, the reason for asking is because I am not sure how much of processor power is needed for a single drawImage operation and what are the time consuming factors. I am aware if there is almost complete coverage of the background, it would be stupid to redraw portions of it, because by drawing portions I will have drawn the complete picture. But since sometimes only half of the image had changed (some objects remained in their old position), it may (perhaps) be benefitial to redraw only those regions. But I need your insight on this... Thanks.

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