身份字段验证 [英] ID field validation

问题描述

我是这个网站的新手.

我想在asp.net中使用正则表达式验证，以防止用户在文本开头插入数字或特殊字符.

如果用户输入12abcd或* abcd，则不允许这样做，但如果输入abcd12或abc12d *，则允许这样做.

我该如何实现?

感谢您的帮助.

Hi,

I am new in this site.

I want to use regular expression validation in asp.net to prevent user inserting digit or special character at the start of the text.

If the user entered 12abcd or *abcd this is not allowed but in case abcd12 or abc12d* this is allowed.

How can I achieve this?

Thank you for helping me.

推荐答案

尝试一下:

Try this:

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><asp:RegularExpressionValidator

            ID="RegularExpressionValidator1" ValidationExpression="^[_A-Za-z][\S]*

" ControlToValidate =" TextBox1" 显示 =" 运行率 =" ErrorMessage 无效的输入." ">< ; /asp:RegularExpressionValidator > < br > < asp:Button ID =" runat 服务器" 文本 提交" /

" ControlToValidate="TextBox1" Display="Dynamic" runat="server" ErrorMessage="Invalid Input."></asp:RegularExpressionValidator> <br /> <asp:Button ID="Button1" runat="server" Text="Submit" />

这可能对您有所帮助.

正则表达式速查表 [ ^ ]

This may help you.

Regular Expression Cheat Sheet [^]

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