我该如何强迫用户编写@ [英] how can I force user to write chracter such as @

问题描述

如何使用验证文本框强制用户在文本框中编写诸如@或:之类的文字
最好的问候

how can I force user to write chracter such as @ or : in textbox using validating textbox
best regards

推荐答案

有两种方法可以做到:您可以处理TextBox事件(TextChanged和Validating可能是您最常使用的事件)，或者可以使用一个MaskedTextBox，它将允许您确切指定所需的输入.

There are two ways to do it: you can handle the TextBox events (TextChanged, and Validating are probably the most use to you) or you could use a MaskedTextBox which will allow you to specify exactly what input you need.

Here[^] is a very simple article on text box validation.
It should give you enough ideas to start trying to implement a solution for your this problem.

您好，

我认为您必须使用正则表达式验证文本框(接受的字符串格式符合正则表达式格式)

点击此链接可能会很有用 http://www.codeproject.com/KB/recipes/RegexTester.aspx

祝你好运

Hi,

i think you have to use Regular Expression to validate Textbox (accept string has format meets the regular expression format)

follow this link it may be useful http://www.codeproject.com/KB/recipes/RegexTester.aspx

good luck,

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