Vb6 检测CommonDialog控件中的取消按钮

在VB6中，如果我按下

打开文件

对话框上的

取消

按钮，我的文件名仍会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

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

---

看起来您正在使用

CommonDialog

控件？如果是这样，您需要将

CancelError

属性设置为

True

，然后测试错误。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

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

---

谢谢你的建议@债券：D