Question

我在后端使用sliverlight 2.0中的openFileDialog和vb.net。我把它连接起来并且它正在工作，因为它假设除了click事件似乎发射两次。它第一次触发，我选择文件并单击确定。它进行处理。但是一旦我点击确定，点击事件就会再次触发，对话框会再次出现。这不是我想要的，我不知道我第二次出现的错误。这是代码..希望有人看到我做错了什么。

<Button x:Name="bOpenFileDialog" Content="2. Import CSV"
             Height="30" Width="200" Margin="0,96,0,0"
             HorizontalAlignment="Left" VerticalAlignment="Top" 
             Click="bOpenFileDialog_Click" />
    <TextBlock Height="19" Margin="246,26,261,0" VerticalAlignment="Top" Text="TextBlock" TextWrapping="Wrap" x:Name="lblMsg"/>

 Private Sub bOpenFileDialog_Click(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles bOpenFileDialog.Click
    Me.bOpenFileDialog.IsEnabled = False
    ' Create an instance of the open file dialog box.
    Dim openFileDialog1 As OpenFileDialog = New OpenFileDialog


    ' Set filter options and filter index.
    openFileDialog1.Filter = "LOG Files (*.log)|*.log|All Files (*.*)|*.*"
    openFileDialog1.FilterIndex = 1

    openFileDialog1.Multiselect = True

    ' Call the ShowDialog method to show the dialogbox.
    Dim UserClickedOK As Boolean = CBool(openFileDialog1.ShowDialog)

    ' Process input if the user clicked OK.
    If (UserClickedOK = True) Then
        Dim rows As Integer = openFileDialog1.Files.Count - 1
        ReDim aryIISLogs(rows)

        For i As Integer = 0 To openFileDialog1.Files.Count - 1
            aryIISLogs(i) = openFileDialog1.Files(i).Name
        Next
        Process1File()
    End If
End Sub

由于香农

Answer 1

我认为这是因为你注册了两次事件：你在按钮定义中有它：

Click="bOpenFileDialog_Click"

并在方法定义中：

Private Sub bOpenFileDialog_Click(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles bOpenFileDialog.Click

每个触发事件，因此您有两个弹出窗口。如果您删除“Click =”或“handle”，您将只触发一次事件。

silverlight OpenFileDialog第二次打开

1 个答案: