我正在尝试通过单击 ThumbnailToolBarButton 按钮关闭全新 WPF 应用程序中的窗口（对默认生成的 xaml 没有更改）。当我尝试这样做时，出现以下错误：
System.InvalidOperationException was unhandled
Message=Operation is not valid due to the current state of the object.
Source=WindowsBase
StackTrace:
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at System.Windows.Forms.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at System.Windows.Forms.NativeWindow.DefWndProc(Message& m)
at System.Windows.Forms.NativeWindow.WndProc(Message& m)
at Microsoft.WindowsAPICodePack.Taskbar.ThumbnailToolbarProxyWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(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.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
at System.Windows.Application.RunDispatcher(Object ignore)
at System.Windows.Application.RunInternal(Window window)
at System.Windows.Application.Run(Window window)
at System.Windows.Application.Run()
at WpfApplication1.App.Main() in d:\documents\visual studio 2010\Projects\WpfApplication1\WpfApplication1\obj\x86\Debug\App.g.cs:line 0
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
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()
InnerException:
这是我的代码：
using System;
using System.Reflection;
using System.Windows;
using System.Windows.Interop;
using Microsoft.WindowsAPICodePack.Taskbar;
namespace WpfApplication1
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
Loaded += new RoutedEventHandler(MainWindow_Loaded);
}
void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
ThumbnailToolBarButton thumbCancel = new ThumbnailToolBarButton(System.Drawing.Icon.ExtractAssociatedIcon(Assembly.GetEntryAssembly().Location), "Cancel");
thumbCancel.Click += new EventHandler<ThumbnailButtonClickedEventArgs>(thumbCancel_Click);
TaskbarManager.Instance.ThumbnailToolBars.AddButtons(new WindowInteropHelper(this).Handle, thumbCancel);
}
void thumbCancel_Click(object sender, ThumbnailButtonClickedEventArgs e)
{
Close();
}
}
}
谢谢。