如何区分 InputBox Cancel 和 OK 按钮? [英] How to distinguish InputBox Cancel from OK button?

问题描述

快速问题:

我在 C# 代码中使用 Microsoft.VisualBasic.Interaction.InputBox 来允许用户将网站添加到列表中，但我不希望他们输入空字符串，所以我如果发生这种情况，请给出错误弹出窗口.但是，如果用户按取消"，错误也会弹出，这是我不希望发生的.

I'm using a Microsoft.VisualBasic.Interaction.InputBox in my C# code to allow users to add websites to a list, but I don't want them to enter an empty string so I give an error popup in case that happens. However, the error will also pop up if the user presses "cancel", which I don't want to happen.

阅读它的文档说按取消"会返回一个空字符串，因此它会触发错误.有没有办法仍然定义用户是用空字符串按下确定"还是取消"?

Reading the documentation on it says that pressing "cancel" returns an empty string, hence why it fires the error. Is there a way to still define wether the user pressed "okay" with an empty string or "cancel"?

提前致谢，

-彼得

推荐答案

你不能这样做.来自 MSDN

如果用户单击取消，则返回零长度字符串.

    Dim result As String = Microsoft.VisualBasic.InputBox("Enter some text")
    If result.Length > 0 Then
        Debug.WriteLine("Something entered and OK Clicked")
    Else
        Debug.WriteLine("Cancel Button Clicked OR Blank String Entered and OK Clicked")
    End If

最简单的解决方案就是创建自己的简单输入表单并测试 DialogResult 值

The easiest solution is just to create your own simple input form and test the DialogResult value

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