VB中的输入框限制 [英] Input box limit in VB

问题描述

一个简单的问题:我可以在 vb 中通过输入框设置输入的限制吗?

a simple question: can I set the limit for an input through an input box in vb?

当用户插入大于数据库对应字段的字符串时，这显然是一个问题.

When the user inserts a string larger than the database corresponding field, that's a problem obviously.

就像 textBoxes 有 MaxLength 一样，有没有办法为 inputBox 设置类似的限制?

Like the textBoxes have a MaxLength, is there a way to set a similar restriction to an inputBox?

谢谢

推荐答案

比创建自定义类更容易...

Little easier than creating a custom class...

相反，为什么不创建一个临时字符串变量并通过您的输入框分配它...

Instead why not create a temporary string variable and assign it by your input box. . .

然后在 do until 循环中检查计数...

then check the count in a do until loop...

前.

 Dim str As String = InputBox("Name", [Title]:="name", [XPos]:=50, [YPos]:=50)

    Do Until str.Count() > 0 And str.Count() < 8

        MessageBox.Show("I am sorry but you need to input between 1 and 7 characters")

        str = InputBox("Name", [Title]:="name", [XPos]:=50, [YPos]:=50)

    Loop

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