Winforms中的验证文本框 [英] Validation textbox in winforms

问题描述

如何在Winforms的文本框控件中验证文本?
我有一个控件，用户必须在其中放置字符串，例如"13:55".我想显示MessageBox，当此值与"XX:YY"不同时.
怎么做?
在asp.net中，创建起来非常容易，但是如何在winforms上实现它呢?

How to validate text in textbox control in winforms?
I have a control, where user have to put string, like "13:55". I want to show MessageBox, when this value will be diffrent, than "XX:YY".
How to do it?
In asp.net it was so easy to make, but how to implement it on winforms?

推荐答案

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Check out the MaskedTextBox if you don't want to have to validate in the first place.

var l_control = new MaskedTextBox();
l_control.Mask = "00\:00";

如果要使第一位为可选:

If you want to make the first digit optional:

l_control.Mask = "90\:90";

否则，您可以使用正则表达式.用冒号分隔的4位数字为: @"^ \ d {2}:\ d {2} $" .( @ 符号可防止C#将'\'当作转义字符-正则表达式没有唯一的含义.)

Otherwise, you could use a regular expression. 4 digits separated by a colon would be: @"^\d{2}:\d{2}$". (The @ symbol prevents C# from treating '\' as an escape character - nothing unique to regex.)

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