想请帮忙看看我的代码

Question

  我正在篇写有关compare textbox len 的代码但是message box的part 

        Label3.Text = CStr(Len(txtProductID.Text))
        Dim str1 As String

        str1 = "14"
        If Label3.Text = str1 Then
        Else
            MessageBox.Show("Invalid ID")
            txtProductID.Text = ""
        End If

Answer 1

Hi christing,

我根据你的代码进行了测试，

测试结果：

没有发现错误，所以我们需要关于你遇到的问题的更多信息。

关于 MessageBox的部分，你遇到了什么问题呢?

期待你的更新。

Best Regards,

Xingyu Zhao

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