vb6 - 检测 CommonDialog 控件中的取消按钮

Question

在 VB6 中，如果我按 Cancel Open File 上的按钮对话框，我的文件名仍然添加到我的列表框中。

例如:

Private Sub btnImportImage_Click()
    DailogOpenFile.ShowOpen
    If Trim$(txtEmailAttachment.Text) = "" Then
        txtEmailAttachment.Text = DailogOpenFile.FileName
    Else
        txtEmailAttachment.Text = txtEmailAttachment.Text & ";" & DailogOpenFile.FileName
    End If

End Sub

Answer 1

看起来您正在使用 CommonDialog控制？如果是这样，您需要设置 CancelError属性(property)到True然后测试是否有错误。例如:

Private Sub btnImportImage_Click()

    DailogOpenFile.CancelError = True

    On Error Resume Next
    DailogOpenFile.ShowOpen

    If Err.Number = &H7FF3 Then
        ' Cancel clicked
    Else

    End If

    ...

End Sub

当然，您也可以跳转到错误处理程序:

Private Sub btnImportImage_Click()

    DailogOpenFile.CancelError = True

    On Error GoTo MyErrorHandler
    DailogOpenFile.ShowOpen

    ...

MyErrorHandler:
    ' Cancel was clicked or some other error occurred

End Sub