[否适合完成此操作成像组件被发现与QUOT。 [英] "No imaging component suitable to complete this operation was found."
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问题描述
我已经编程，它需要下载* .png文件，并将其设置到按钮的背景 WPF 的应用程序。所以，当我运行这个程序，它面临的错误是没有合适的来完成此操作成像组件被发现。我的code是如下：
I have programmed an application that it needs to download *.png files and set it into the background of the button in WPF. So, when i run this program, it faces the Error as "No imaging component suitable to complete this operation was found." My code is as below :
首先应用程序下载与WebClient类的对象文件：
First application downloads the file with WebClient class's object:
System.Net.WebClient wClient = new System.Net.WebClient();
Uri downloadUri = new Uri(MyUri, UriKind.Absolute);
wClient.DownloadFileAsync(downloadUri, "MyImage.png");
wClient.DownloadFileCompleted += new System.ComponentModel.AsyncCompletedEventHandler(wClient_DownloadFileCompleted);
当下载完成的事件发生：
and when download completed event occurred:
ImageBtn.Dispatcher.Invoke(new Action(() =>
{
ImageBrush ib = new ImageBrush();
BitmapImage bi = new BitmapImage();
bi.BeginInit();
bi.UriSource = new Uri("MyImage.png", UriKind.Relative);
bi.EndInit();
ib.ImageSource = bi;
ImageBtn.Background = ib;
}
[注] 由于在BackgroundWorker的运行codeS这些块，我使用分派器设置按钮背景属性
所以，当我运行程序， System.NotSupportedException 发生如下：
So, when i run the program, System.NotSupportedException occurred as below :
Exception from HRESULT: 0x88982F50
Error Code : -2003292336
Message : No imaging component suitable to complete this operation was found.
Source : PresentationCore
Stack Trace : at System.Windows.Media.Imaging.BitmapDecoder.SetupDecoderFromUriOrStream(Uri uri, Stream stream, BitmapCacheOption cacheOption, Guid& clsId, Boolean& isOriginalWritable, Stream& uriStream, UnmanagedMemoryStream& unmanagedMemoryStream, SafeFileHandle& safeFilehandle)
at System.Windows.Media.Imaging.BitmapDecoder.CreateFromUriOrStream(Uri baseUri, Uri uri, Stream stream, BitmapCreateOptions createOptions, BitmapCacheOption cacheOption, RequestCachePolicy uriCachePolicy, Boolean insertInDecoderCache)
at System.Windows.Media.Imaging.BitmapImage.FinalizeCreation()
at System.Windows.Media.Imaging.BitmapSource.CompleteDelayedCreation()
at System.Windows.Media.Imaging.BitmapSource.get_WicSourceHandle()
at System.Windows.Media.Imaging.BitmapSource.get_DUCECompatiblePtr()
at System.Windows.Media.Imaging.BitmapSource.UpdateBitmapSourceResource(Channel channel, Boolean skipOnChannelCheck)
at System.Windows.Media.Imaging.BitmapSource.AddRefOnChannelCore(Channel channel)
at System.Windows.Media.Imaging.BitmapSource.System.Windows.Media.Composition.DUCE.IResource.AddRefOnChannel(Channel channel)
at System.Windows.Media.ImageBrush.AddRefOnChannelCore(Channel channel)
at System.Windows.Media.Brush.System.Windows.Media.Composition.DUCE.IResource.AddRefOnChannel(Channel channel)
at System.Windows.Media.RenderData.System.Windows.Media.Composition.DUCE.IResource.AddRefOnChannel(Channel channel)
at System.Windows.UIElement.RenderContent(RenderContext ctx, Boolean isOnChannel)
at System.Windows.Media.Visual.UpdateContent(RenderContext ctx, VisualProxyFlags flags, Boolean isOnChannel)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
at System.Windows.Media.Visual.Render(RenderContext ctx, UInt32 childIndex)
at System.Windows.Media.CompositionTarget.Compile(Channel channel)
at System.Windows.Media.CompositionTarget.System.Windows.Media.ICompositionTarget.Render(Boolean inResize, Channel channel)
at System.Windows.Media.MediaContext.Render(ICompositionTarget resizedCompositionTarget)
at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.DispatcherOperation.InvokeImpl()
at System.Threading.ExecutionContext.runTryCode(Object userData)
at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Windows.Threading.DispatcherOperation.Invoke()
at System.Windows.Threading.Dispatcher.ProcessQueue()
at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
at System.Windows.Application.RunDispatcher(Object ignore)
at System.Windows.Application.RunInternal(Window window)
at WPF_KSMMessenger.App.Main() in C:\Users\Hossein\Desktop\WPF_KSMMessenger\WPF_KSMMessenger\obj\x86\Debug\App.g.cs:line 0
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
我应该怎么做才能解决这个问题？
What should i do to solve this problem?
感谢您的关注。
推荐答案
您code工作正常，我从谷歌的图像中选择一个随机的形象，所以我的猜测是，你正在下载的图像有一些问题分类。你可以试试下面的code在Dispatcher.Invoke前右侧的处理程序。
Your code works fine for me on a random image selected from Google images, so my guess is that the image you are downloading has an issue of some sort. You can try the following code in the handler right before Dispatcher.Invoke.
var encoder = new PngBitmapEncoder();
var image = new BitmapImage( new Uri( "MyImage.png", UriKind.Relative ) );
encoder.Frames.Add( BitmapFrame.Create( image ) );
using ( var stream = new FileStream( "MyImage2.png", FileMode.Create, FileAccess.Write ) )
{
encoder.Save( stream );
}
然后使用MyImage2.png代替。这是企图有EN codeR修复加载到刷前的图像。说实话，虽然这code为我工作，我几乎没有张贴这一点，因为我不知道它是否会为你的情况，我不喜欢张贴code，当我不知道结果。绝对让我知道，如果它帮助。
Then use "MyImage2.png" instead. It is an attempt to have the encoder "fix" the image before loading it into the brush. To be honest, while this code works for me, I almost didn't post this because I have no idea if it will work for your situation, and I don't like posting code when I don't know the result. Definitely let me know if it helps.
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