新线程仍在阻止UI线程 [英] New Thread is still blocking UI-Thread

问题描述

单击按钮时，我将启动一个单独的主题，该主题将填充网格并通过Web浏览器控件执行某些操作.但是当单击按钮时，新线程似乎并没有分开，导致UI冻结，直到完成新线程为止.

when a button is clicked i start a seperate thead which is population a grid and does something with a webbrowser-control. But when the button is click the new thread seems not to be seperate, cause the UI is freezing until the new thread is done.

代码在这里:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles Button1.Click
    FindCustomerLocation()
    e.Handled = True
End Sub


Private Sub FindCustomerLocation()
    Dim Findcontractor_Thread As New Thread(AddressOf FindContractor_ThreadExecute)
    Findcontractor_Thread.Priority = ThreadPriority.AboveNormal
    Findcontractor_Thread.Start()
End Sub


Delegate Sub FindContractorDelegate(ByVal igGrid As Infragistics.Windows.DataPresenter.XamDataGrid, ByVal webbrowser As Controls.WebBrowser)


Private Sub FindContractor_ThreadExecute()
    Dim threadControls(1) As Object
    threadControls(0) = Me.XamDataGrid1
    threadControls(1) = Me.WebBrowserMap

    Dim m As FindContractorDelegate = AddressOf FindContractor_WorkingThread
    Me.Dispatcher.BeginInvoke(m, threadControls)
End Sub


Private Sub FindContractor_WorkingThread()

    Mouse.OverrideCursor = Cursors.Wait

'Do something...

    Mouse.OverrideCursor = Nothing
End Sub

我做错了什么?

谢谢， 尼尔斯

推荐答案

您可能会在做某事"中使用winforms控件.只能在UI线程中维护控件.

You propabldy working with the winforms controls in the "'do something". The controls can be mainupulated only in UI thread.

因此，"BeginInvoke"在UI线程中调用目标.因此，您创建了并行线程，但是整个想法又在UI线程中完成了.

So, the "BeginInvoke" call the target in ths UI thread. So you create te paralel thread, but the whole think is doing in UI thread again.

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