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• How to copy DispatcherObject (BitmapSource) into different thread?

  - by Tomáš Kafka

  Hi, I am trying to figure out how can I copy DispatcherObject (in my case BitmapSource) into another thread. Use case: I have a WPF app that needs to show window in a new thread (the app is actually Outlook addin and we need to do this because Outlook has some hooks in the main UI thread and is stealing certain hotkeys that we need to use - 'lost in translation' in interop of Outlook, WPF (which we use for UI), and Winforms (we need to use certain microsoft-provided winforms controls)). With that, I have my implementation of WPFMessageBox, that is configured by setting some static properties - and and one of them is BitmapSource for icon. This is used so that in startup I can set WPFMessageBox.Icon once, and since then, every WPFMessageBox will have the same icon. The problem is that BitmapSource, which is assigned into icon, is a DispatcherObject, and when read, it will throw InvalidOperationException: "The calling thread cannot access this object because a different thread owns it.". How can I clone that BitmapSource into the actual thread? It has Clone() and CloneCurrentValue() methods, which don't work (they throw the same exception as well). It also occured to me to use originalIcon.Dispatcher.Invoke( do the cloning here ) - but the BitmapSource's Dispatcher is null, and still - I'd create a copy on a wrong thread and still couldnt use it on mine. BitmapSource.IsFrozen == true. Any idea on how to copy the BitmapSource into different thread (without completely reconstructing it from an image file in a new thread)? EDIT: So, freezing does not help: In the end I have a BitmapFrame (Window.Icon doesn't take any other kind of ImageSource anyway), and when I assign it as a Window.Icon on a different thread, even if frozen, I get InvalidOperationException: "The calling thread cannot access this object because a different thread owns it." with a following stack trace: WindowsBase.dll!System.Windows.Threading.Dispatcher.VerifyAccess() + 0x4a bytes WindowsBase.dll!System.Windows.Threading.DispatcherObject.VerifyAccess() + 0xc bytes PresentationCore.dll!System.Windows.Media.Imaging.BitmapDecoder.Frames.get() + 0xe bytes PresentationFramework.dll!MS.Internal.AppModel.IconHelper.GetIconHandlesFromBitmapFrame(object callingObj = {WPFControls.WPFMBox.WpfMessageBoxWindow: header}, System.Windows.Media.Imaging.BitmapFrame bf = {System.Windows.Media.Imaging.BitmapFrameDecode}, ref MS.Win32.NativeMethods.IconHandle largeIconHandle = {MS.Win32.NativeMethods.IconHandle}, ref MS.Win32.NativeMethods.IconHandle smallIconHandle = {MS.Win32.NativeMethods.IconHandle}) + 0x3b bytes > PresentationFramework.dll!System.Windows.Window.UpdateIcon() + 0x118 bytes PresentationFramework.dll!System.Windows.Window.SetupInitialState(double requestedTop = NaN, double requestedLeft = NaN, double requestedWidth = 560.0, double requestedHeight = NaN) + 0x8a bytes PresentationFramework.dll!System.Windows.Window.CreateSourceWindowImpl() + 0x19b bytes PresentationFramework.dll!System.Windows.Window.SafeCreateWindow() + 0x29 bytes PresentationFramework.dll!System.Windows.Window.ShowHelper(object booleanBox) + 0x81 bytes PresentationFramework.dll!System.Windows.Window.Show() + 0x48 bytes PresentationFramework.dll!System.Windows.Window.ShowDialog() + 0x29f bytes WPFControls.dll!WPFControls.WPFMBox.WpfMessageBox.ShowDialog(System.Windows.Window owner = {WPFControlsTest.MainWindow}) Line 185 + 0x10 bytes C#

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• how to verify google openid response

  - by Broom

  I'm trying to add authorization throw google openid to my users. I'm receiving id (https://www.google.com/accounts/o8/id?id=AIt...Ew-Bo) but how can i check that it's legit. I mean user can create malicious request with email of another user, how can i check that returning email and claimed id is legit?

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• dotnetopenauth pending request lost

  - by Graham

  I have dotnetopenauth working fine as a provider except when a user clicks the submit button multible times. Then the following error occurs: Throw New InvalidOperationException("There's no pending authentication request!") What is the best way to prevent this happening?

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• Is there a way to set custom collapsable code regions in Xcode

  - by Martytoof

  Is there a way to create custom collapsable code regions in Xcode similar to how Visual Studio can fold around #region/#endregion blocks? It would be nice to throw all autogenerated content into a region that I can fold away until I need to look at it. #pragma mark doesn't seem to do the trick.

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• c++ dynamic_cast error handling

  - by Nazgob

  Is there any good practice related to dynamic_cast error handling (except not using it when you don't have to)? I'm wondering how should I go about NULL and bad_cast it can throw. Should I check for both? And if I catch bad_cast or detect NULL I probably can't recover anyway... For now, I'm using assert to check if dynamic_cast returned not NULL value. Would you accept this solution on a code review?

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• How to Instantiate a Custom EventArgs Class that has no Accessible Constructor?

  - by Motig

  I have a problem; I'm using an external library where one particular event has its own custom eventargs; with no constructor. If I want to throw my own event using these eventargs, how can I? I'll give more detail if asked, but I'm not sure what exactly I should be giving. :)

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• DRY Ruby Initialization with Hash Argument

  - by ktex

  I find myself using hash arguments to constructors quite a bit, especially when writing DSLs for configuration or other bits of API that the end user will be exposed to. What I end up doing is something like the following: class Example PROPERTIES = [:name, :age] PROPERTIES.each { |p| attr_reader p } def initialize(args) PROPERTIES.each do |p| self.instance_variable_set "@#{p}", args[p] if not args[p].nil? end end end Is there no more idiomatic way to achieve this? The throw-away constant and the symbol to string conversion seem particularly egregious.

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• How to str_replace a section of PHP Code

  - by whatshakin

  $embedCode = <<<EOF getApplicationContent('video','player',array('id' => $iFileId, 'user' => $this->iViewer, 'password' => clear_xss($_COOKIE['memberPassword'])),true) EOF; $name = str_replace($embedCode,"test",$content); I'm trying to replace a section of code with another piece of code. I can do it with smaller strings but once I added the larger strings to $embedCode, it throw an "unexpected T_ENCAPSED_AND_WHITESPACE" error

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• Get Doxygen to show XCode compile errors if documentation is missing

  - by Rob

  I have been successful with this in the past but now I can't seem to find the setting that tells XCode or Doxygen (or both) to display compile errors if documentation is missing. I have looked at the Apple documentation that tells how to create docsets and that works fine but XCode does not throw compiling errors on missing comments in the source code. Anyone know how to get this turned on? Thanks, Rob

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• Injecting Annotated Bean into Regular Bean

  - by jboyd

  AppContext.xml <bean id="myBean" class="com.myapp.MyClass"> <property ref="myService"/> </bean> MyService.java @Service public class MyService { ... } This will throw an exception stating that no bean can be found for property "myService", which I understand because it can't be found in the context files, but I can autowire that field in other spring managed beans, but I need to explicitly build the bean in my context because the POJO is not editable in the scope of my project.

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• How to programmly download image from website ?

  - by MemoryLeak

  I need to download images from a website, and I have the login name and password, but if i just use URL to download the image, it will throw a exception: there is no value in session. I think I need to login the website before I can programmingly download the image. Do you have any solutions ? Thanks in advance !

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• jquery - validate characters on keypress?

  - by TwixxyKit

  I have a form text field that I want to allow only numbers and letters in. (i.e., no #$!, etc...) Is there a way to throw up an error and prevent the keypress from actually outputting anything if the user tries to use any character other than numbers and letters? I've been trying to find a plugin, but haven't really found anything that does this...

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• PHP mysqli error return time

  - by Dori

  Hello. Can i ask a fundamental question. Why when I try to create a new mysqli object in php with invalid database infomation (say an incorrect database name) does it not return an error intstantly? I usually program server stuff in Java and something like this would throw back an error strait away, not after 20 seconds or so. For example $conn = new mysqli($host, $username, $password, $database); Thanks!

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• Ctrl-M chars when transfer files SFTP

  - by eve

  Hi, I am sending files from a windows system to a Unix SFTP server using JSCAPE ftp client. However, I am experiencing the following issue: When uploading a text file from windows to UNiX, each line of text files transferred contains Control-M characters. I did some search and found out that If I use the "ASCII" transfer mode it should solve the issue. But the Ctrl-M is still appearing on the files. Can anyone throw some light in this issue? thanks in advance

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• Parallel computing in .net

  - by HotTester

  Since the launch of .net 4.0 a new term that has got into lime light is parallel computing. Does parallel computing provide us some benefits or its just another concept or feature. Further is .net really going to utilize it in applications ? Further is parallel computing different from parallel programming ? Kindly throw some light on the issue in perspective of .net and some examples would be helpful. Thanks...

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• How do I upload a file to an SFTP server in C# / .NET?

  - by Corey

  Does this capability come with .Net? If not, what's the best free library? I need something that will throw good exceptions when there is a problem, and allows me to monitor its progress.

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• web application , join event on facebook using php api

  - by Mohammed Al-shareif

  enter code herei created my events on facebook throw php api (form my website) ...every thing its fine with me and the events appear 100% on FB calendar , i got the FB event id and save to my db , enter code here my users can join the same event on my website i need them to join the same event on facebook also i have the facebook event id , and user accept my permission to access his/here calendar please anybody help!!!

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• Javascript: Inline function vs predefined functions

  - by glaz666

  Can any body throw me some arguments for using inline functions against passing predefined function name to some handler. I.e. which is better: (function(){ setTimeout(function(){ /*some code here*/ }, 5); })(); versus (function(){ function invokeMe() { /*code*/ } setTimeout(invokeMe, 5); })(); Strange question, but we are almost fighting in the team about this

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• asp.net MVC: how to catch a 404 error?

  - by Michel

  Hi, in the old days, with asp.net, when i would navigate to a non existing page, the .net framework (or iis?) would throw a 404 and i could attach a default page to that error in the web.config in the custom errors section. but in the asp.net mvc that doesn't seem to work? Does the mvc framework throws some kind of invalid route excpetion saying it can't find any route for my uri or something like that?

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• Cucumber Failing with Nokogiri

  - by Paul

  I just started using Cucumber and in the simplest of scenarios I throw the following error: undefined method has_key?' for #<Nokogiri::XML::Element:0x10677a400> (NoMethodError) ./features/step_definitions/web_steps.rb:36:in/^(?:|I )fill in "([^"])" with "([^"])"$/' features/authentication.feature:9:in `When I fill in "user_name" with "Joe User"' The Scenario is as follows... Scenario: Signup Given I go to the signup page When I fill in "user_name" with "Joe User" Is this a problem in the Scenario, Cucumber, or Nokogiri? Any Solutions?

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• How can i restart MSDTC service on remote server from client machine

  - by ShaBeg

  Hi, I have requirement to restart MSDTC service on a remote server throw code of my application . Could you please help me through a code example. Thanks and Regards ShaBeg

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• Autofac wiring question - beginner

  - by user645788

  Beginners question: Given two classes: Myclass5 and Myclass6 how can one wire up following factory method (returned as Func) such that myclass5 and myclass6 instances and IMyClass that they depend on are all retrieved via autofac (assuming that these three instances are registered). public static MyClass4 FactoryMethod(int nu) { if (nu == 1) return new MyClass5(....); if (nu == 4) return new MyClass6(....); throw new NotImplementedException(); } public abstract class MyClass4 { } public class MyClass5 : MyClass4 { public MyClass5(int nu, IMyClass a) { } } public class MyClass6 : MyClass4 { public MyClass6(int nu, IMyClass a) { } }

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• How to get process Commandline Parameters on Windows 2000 using C#

  - by guaike

  How to get process Commandline Parameters at Windows 2000 using C#? I'm use WMI query :select ExecutablePath,CommandLine from Win32_Process where Name='test' but windows 2000 throw this exception: system.management.managementexception : invalid query. so I do not know how to do it work in windows 2000,please help me, Thank you!

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• node.js and jsdom - no way to detect that an http 500 error was returned?

  - by Nathan Ridley

  I'm using jsdom with node.js and I'm trying to get it to provide me with some indication that an http error has occurred. I've set up a test server that simply returns an http 500 header for all requests, but when I attempt to load it with jsdom, jsdom doesn't throw any error and doesn't seem to provide me with any information that would identify that an http 500 error was returned. What's the best way to detect an http 500 error?

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• Can I tell direct3d to render with alpha channel?

  - by Mr Bell

  I need to composite direct3d renders on top of a video feed, the way i have it setup the format i get the data in is 32 bit xrgb with a byte for red green blue and a throw away. Can I get it to render with an alpha channel so i can use it for better blending?

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