如何解决WPF UI问题？ [英] How do you troubleshoot WPF UI problems?

问题描述

我正在开发WPF应用程序，有时会出现奇怪的问题，并在UI中显示为挂起。它是不一致的，它发生在不同的页面，但它经常发生，这是一个大问题。我应该提到这不是一个真正的挂起，如下所述。

I'm working on a WPF application that sometimes exhibits odd problems and appears to hang in the UI. It is inconsistent, it happens in different pages, but it happens often enough that it is a big problem. I should mention that it is not a true hang as described below.

我的第一个想法是，一些按钮的动画是这个问题，因为它们在大多数页面上使用，但是在删除它们之后仍然发生挂起，尽管看起来似乎不太频繁。挂起时我试图进入调试器;然而，从来没有任何代码可以查看。我的代码没有运行。我也注意到挂不完整。我有代码允许我拖动窗体（它没有边框或标题）继续工作。我也有我的关闭按钮，当我点击它的功能。点击按钮显示为实际工作，因为我的代码运行，但UI从来不会更新显示一个新的页面。

My first thought was that the animations of some buttons was the problem since they are used on most pages, but after removing them the hangs still occur, although seemingly a bit less often. I have tried to break into the debugger when the hang occurs; however there is never any code to view. No code of mine is running. I have also noticed that the "hang" is not complete. I have code that lets me drag the form around (it has no border or title) which continues to work. I also have my won close button which functions when I click it. Clicking on buttons appears to actually work as my code runs, but the UI simply never updates to show a new page.

我正在寻找任何建议，工具或技术跟踪这个奇怪的问题，所以如果你有任何想法，我将非常感激。

I'm looking for any advice, tools or techniques to track down this odd problem, so if you have any thoughts at all, I will greatly appreciate it.

编辑：刚刚发生了，所以这次我试过打破调试器我选择了显示反汇编。它带给我MS.Win32.UnsafeNativeMethods.GetMessageW。堆栈跟踪如下：

It just happened again, so this time when I tried to break into the debugger I chose to "show disassembly". It brings me to MS.Win32.UnsafeNativeMethods.GetMessageW. The stack trace follows:

[Managed to Native Transition]  

WindowsBase.dll！MS.Win32.UnsafeNativeMethods.GetMessageW（ref System.Windows.Interop.MSG msg，System.Runtime.InteropServices.HandleRef hWnd，int uMsgFilterMin，int uMsgFilterMax）+ 0x15 bytes

WindowsBase.dll！System.Windows.Threading.Dispatcher.GetMessage（ref System.Windows.Interop.MSG msg，System.IntPtr hwnd，int minMessage， int maxMessage）+ 0x48 bytes
WindowsBase.dll！System.Windows.Threading.Dispatcher.PushFrameImpl（System.Windows.Threading.DispatcherFrame frame = {System.Windows.Threading.DispatcherFrame}）+ 0x8b bytes
WindowsBase.dll！System.Windows.Threading.Dispatcher.PushFrame（System.Windows.Threading.DispatcherFrame frame）+ 0x49 bytes

WindowsBase.dll！System.Windows.Threading.Dispatcher.Run（）+ 0x4c字节

PresentationFramework.dll！System.Windows.Application.RunDispatcher（obje ct忽略）+ 0x1e个字节

PresentationFramework.dll！System.Windows.Application.RunInternal（System.Windows.Window窗口）+ 0x6f字节
PresentationFramework.dll！System.Windows.Application.Run （System.Windows.Window窗口）+ 0x26字节
PresentationFramework.dll！System.Windows.Application.Run（）+ 0x19 bytes
WinterGreen.exe！WinterGreen.App.Main（）+ 0x5e bytes C＃
[本机管理转换]

[管理到本地转换]

mscorlib.dll！System.AppDomain.nExecuteAssembly（System.Reflection.Assembly assembly，string [] args）+ 0x19 bytes
mscorlib.dll！System.Runtime.Hosting.ManifestRunner.Run（bool checkAptModel）+ 0x6e bytes
mscorlib.dll！System.Runtime.Hosting.ManifestRunner.ExecuteAsAssembly（）+ 0x84字节
mscorlib.dll！System.Runtime.Hosting.ApplicationActivator.CreateInstance（System.ActivationContext activationContext，string [] activationCustomData）+ 0x65 bytes
mscorlib.dll！System.Runtime.Hosting.ApplicationActivator.CreateInstance（System.ActivationContext activationContext）+ 0xa bytes
mscorlib.dll！System.Activator.CreateInstance（System.ActivationContext activationContext）+ 0x3e bytes

Microsoft.VisualStudio.HostingProcess.Utilities.dll！Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone（）+ 0x23 bytes

mscorlib.dll！System.Threading.ThreadHelper.ThreadStart_Context（对象状态）+ 0x66字节

mscorlib.dll！System.Threading.ExecutionContext.Run（System.Threading.ExecutionContext executionContext，System.Threading.ContextCallback callback，object state）+ 0x6f bytes

mscorlib.dll！ System.Threading.ThreadHelper.ThreadStart（）+ 0x44 bytes

WindowsBase.dll!MS.Win32.UnsafeNativeMethods.GetMessageW(ref System.Windows.Interop.MSG msg, System.Runtime.InteropServices.HandleRef hWnd, int uMsgFilterMin, int uMsgFilterMax) + 0x15 bytes
WindowsBase.dll!System.Windows.Threading.Dispatcher.GetMessage(ref System.Windows.Interop.MSG msg, System.IntPtr hwnd, int minMessage, int maxMessage) + 0x48 bytes WindowsBase.dll!System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame frame = {System.Windows.Threading.DispatcherFrame}) + 0x8b bytes WindowsBase.dll!System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame frame) + 0x49 bytes
WindowsBase.dll!System.Windows.Threading.Dispatcher.Run() + 0x4c bytes
PresentationFramework.dll!System.Windows.Application.RunDispatcher(object ignore) + 0x1e bytes
PresentationFramework.dll!System.Windows.Application.RunInternal(System.Windows.Window window) + 0x6f bytes PresentationFramework.dll!System.Windows.Application.Run(System.Windows.Window window) + 0x26 bytes PresentationFramework.dll!System.Windows.Application.Run() + 0x19 bytes WinterGreen.exe!WinterGreen.App.Main() + 0x5e bytes C# [Native to Managed Transition]
[Managed to Native Transition]
mscorlib.dll!System.AppDomain.nExecuteAssembly(System.Reflection.Assembly assembly, string[] args) + 0x19 bytes mscorlib.dll!System.Runtime.Hosting.ManifestRunner.Run(bool checkAptModel) + 0x6e bytes mscorlib.dll!System.Runtime.Hosting.ManifestRunner.ExecuteAsAssembly() + 0x84 bytes mscorlib.dll!System.Runtime.Hosting.ApplicationActivator.CreateInstance(System.ActivationContext activationContext, string[] activationCustomData) + 0x65 bytes mscorlib.dll!System.Runtime.Hosting.ApplicationActivator.CreateInstance(System.ActivationContext activationContext) + 0xa bytes mscorlib.dll!System.Activator.CreateInstance(System.ActivationContext activationContext) + 0x3e bytes
Microsoft.VisualStudio.HostingProcess.Utilities.dll!Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone() + 0x23 bytes
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart_Context(object state) + 0x66 bytes
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) + 0x6f bytes
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart() + 0x44 bytes

推荐答案

尝试删除无边界行为的窗口，看看是否有帮助。另外，你是否在BeginInvoke（）中启动或调用（））任何长时间运行的操作？

Try removing the borderless behavior of your window and see if that helps. Also, are you BeginInvoke()'ing or Invoke()'ing any long running operations?

另一件事要看：当你打破代码时，在线程以外的主线程。其中一个可能是阻止UI线程。

Another thing to look at: When you break into your code, try looking at threads other than your main thread. One of them may be blocking the UI thread.

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