Invisible or disabled control cannot be activated

在WPF 应用程序下出现：Invisible or disabled control cannot be activated（不见的或禁用的控件不能被激活）错误。

System.ArgumentException: Invisible or disabled control cannot be activated
   at System.Windows.Forms.ContainerControl.SetActiveControlInternal(Control value)
   at System.Windows.Forms.ContainerControl.SetActiveControl(Control ctl)
   at System.Windows.Forms.ContainerControl.set_ActiveControl(Control value)
   at System.Windows.Forms.Integration.WindowsFormsHost.RestoreFocusedChild()
   at System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry tme)
   at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(Object obj)
   at System.Threading.ExecutionContext.runTryCode(Object userData)
   at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, 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.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry tme)
   at System.Windows.Forms.Control.InvokeMarshaledCallbacks()

解决办法：

该错误是线程的问题，对程序运行无影响，可以考虑过滤该错误。

方法如下：

1 确保删除的控件不是不见的或禁用的控件。

2 过滤该错误方法。

public MainWindow()
        {
            System.Windows.Forms.Application.ThreadException += new System.Threading.ThreadExceptionEventHandler(Application_ThreadException);
        }

        void Application_ThreadException(object sender, System.Threading.ThreadExceptionEventArgs e)
        {
            if (!FailureFromFocusedChild(e.Exception))
            {
                System.Windows.Forms.Application.ThreadExceptionDialog dlg;
                dlg = new System.Windows.Forms.Application.ThreadExceptionDialog(e.Exception);
                dlg.ShowDialog();
            }

        private bool FailureFromFocusedChild(Exception e)
        {
            bool result = false;
            string stackTrace = e.StackTrace;
           
            result = (e is System.ArgumentException) && (e.Source == "System.Windows.Forms")
                    && (stackTrace.IndexOf("System.Windows.Forms.Integration.WindowsFormsHost.RestoreFocusedChild")>=0);


            return result;
        }

参考：http://support.microsoft.com/kb/2686194