正则表达式验证(转载)
使用正则表达式进行验证:
在编写处理字符串的程序或网页时,经常会有查找符合某些复杂规则的字符串的需要。正则表达式就是用于描述这些规则的工具。换句话说,正则表达式就是记录文本规则的代码。
关于正则表达式的详细信息请查看:http://www.regexlab.com/zh/regref.htm
正则表达式用于字符串处理、表单验证等场合,实用高效,所以其应用非常广泛,下面我就通过几个例子来说明正则表达式在验证中的具体应用。
在这里我以验证电话号码的格式为例进行介绍。
<1>使用JS验证
<asp:Button ID="Button2" runat="server" Text="测试" OnClientClick="return checkCellPhone();" OnClick="Button2_Click" />
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<2>使用验证控件
正则表达式验证控件(当然这种方法需要加入非空验证)
<asp:RegularExpressionValidator ID="revPhone" runat="server" ControlToValidate="tbPhone" ValidationExpression="^(013|015|13|15)\d{9}$" ErrorMessage="手机号码格式错误!"></asp:RegularExpressionValidator>
<3>使用服务器端程序验证
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上述的是一个简单的应用实例,只要你知道正则表达式的写法,你可以随意将上面实例中的正则表达式进行替换,将一些逻辑进行修改,就能够满足你在验证方面,可以说足够满足你常用的验证。在这里我也收集了一些常用的正则表达式,希望能够对大家有所帮助。
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转自:http://www.cnblogs.com/yank/archive/2008/09/18/1292715.html