C#验证类
using System;
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using System.Text.RegularExpressions;
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namespace bobomousecom.crm
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{
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/**//// <summary>
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/// Regexlib 的摘要说明。
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/// </summary>
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public class Regexlib
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{
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public Regexlib()
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{
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//
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// TODO: 在此处添加构造函数逻辑
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//
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}
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//搜索输入字符串并返回所有 href=“”值
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string DumpHrefs(String inputString)
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{
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Regex r;
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Match m;
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r = new Regex("href\s*=\s*(?:"(?<1>[^"]*)"|(?<1>\S+))",
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RegexOptions.IgnoreCase|RegexOptions.Compiled);
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for (m = r.Match(inputString); m.Success; m = m.NextMatch())
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{
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return("Found href " + m.Groups[1]);
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}
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}
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//验证Email地址
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bool IsValidEmail(string strIn)
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{
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// Return true if strIn is in valid e-mail format.
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return Regex.IsMatch(strIn, @"^([w-.]+)@(([[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.)|(([w-]+.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(]?)$");
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}
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//dd-mm-yy 的日期形式代替 mm/dd/yy 的日期形式。
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string MDYToDMY(String input)
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{
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return Regex.Replace(input,"\b(?\d{1,2})/(?\d{1,2})/(?\d{2,4})\b","${day}-${month}-${year}");
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}
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//验证是否为小数
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bool IsValidDecimal(string strIn)
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{
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return Regex.IsMatch(strIn,@"[0].d{1,2}|[1]");
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}
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//验证是否为电话号码
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bool IsValidTel(string strIn)
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{
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return Regex.IsMatch(strIn,@"(d+-)?(d{4}-?d{7}|d{3}-?d{8}|^d{7,8})(-d+)?");
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}
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64![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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//验证年月日
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bool IsValidDate(string strIn)
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{
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return Regex.IsMatch(strIn,@"^2d{3}-(?:0?[1-9]|1[0-2])-(?:0?[1-9]|[1-2]d|3[0-1])(?:0?[1-9]|1d|2[0-3]):(?:0?[1-9]|[1-5]d):(?:0?[1-9]|[1-5]d)$");
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}
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//验证后缀名
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bool IsValidPostfix(string strIn)
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{
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return Regex.IsMatch(strIn,@".(?i:gif|jpg)$");
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}
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//验证字符是否在4至12之间
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bool IsValidByte(string strIn)
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{
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return Regex.IsMatch(strIn,@"^[a-z]{4,12}$");
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}
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//验证IP
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bool IsValidIp(string strIn)
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{
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return Regex.IsMatch(strIn,@"^(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5])$");
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}
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}
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}
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C#正则表达式小结
只能输入数字:"^[0-9]*$"。
只能输入n位的数字:"^\d{n}$"。
只能输入至少n位的数字:"^\d{n,}$"。
只能输入m~n位的数字:。"^\d{m,n}$"
只能输入零和非零开头的数字:"^(0|[1-9][0-9]*)$"。
只能输入有两位小数的正实数:"^[0-9]+(.[0-9]{2})?$"。
只能输入有1~3位小数的正实数:"^[0-9]+(.[0-9]{1,3})?$"。
只能输入非零的正整数:"^\+?[1-9][0-9]*$"。
只能输入非零的负整数:"^\-[1-9][]0-9"*$。
只能输入长度为3的字符:"^.{3}$"。
只能输入由26个英文字母组成的字符串:"^[A-Za-z]+$"。
只能输入由26个大写英文字母组成的字符串:"^[A-Z]+$"。
只能输入由26个小写英文字母组成的字符串:"^[a-z]+$"。
只能输入由数字和26个英文字母组成的字符串:"^[A-Za-z0-9]+$"。
只能输入由数字、26个英文字母或者下划线组成的字符串:"^\w+$"。
只能输入由数字、26个英文字母或者下划线,中文组成的字符串:^\\w+$
验证用户密码:"^[a-zA-Z]\w{5,17}$"正确格式为:以字母开头,长度在6~18之间,只能包含字符、数字和下划线。
验证是否含有^%&',;=?$\"等字符:"[^%&',;=?$\x22]+"。
只能输入汉字:"^[\u4e00-\u9fa5]{0,}$"
验证Email地址:"^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$"。
验证InternetURL:"^http://([\w-]+\.)+[\w-]+(/[\w-./?%&=]*)?$"。
验证电话号码:"^(\(\d{3,4}-)|\d{3.4}-)?\d{7,8}$"正确格式为:"XXX-XXXXXXX"、"XXXX-XXXXXXXX"、"XXX-XXXXXXX"、"XXX-XXXXXXXX"、"XXXXXXX"和"XXXXXXXX"。
验证身份证号(15位或18位数字):"^\d{15}|\d{18}$"。
验证一年的12个月:"^(0?[1-9]|1[0-2])$"正确格式为:"01"~"09"和"1"~"12"。
验证一个月的31天:"^((0?[1-9])|((1|2)[0-9])|30|31)$"正确格式为;"01"~"09"和"1"~"31"。
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利用正则表达式限制网页表单里的文本框输入内容:
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
用正则表达式限制只能输入中文:onkeyup="value=value.replace(/[^\u4E00-\u9FA5]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\u4E00-\u9FA5]/g,''))"
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
用正则表达式限制只能输入全角字符: onkeyup="value=value.replace(/[^\uFF00-\uFFFF]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\uFF00-\uFFFF]/g,''))"
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
用正则表达式限制只能输入数字:onkeyup="value=value.replace(/[^\d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
用正则表达式限制只能输入数字和英文:onkeyup="value=value.replace(/[\W]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
得用正则表达式从URL地址中提取文件名的javascript程序,如下结果为page1
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
s="http://www.9499.net/page1.htm"
s=s.replace(/(.*\/){0,}([^\.]+).*/ig,"$2")
alert(s)
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匹配双字节字符(包括汉字在内):[^\x00-\xff]
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
应用:计算字符串的长度(一个双字节字符长度计2,ASCII字符计1)
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String.prototype.len=function(){return this.replace([^\x00-\xff]/g,"aa").length;}
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
匹配空行的正则表达式:\n[\s| ]*\r
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
匹配HTML标记的正则表达式:/<(.*)>.*<\/\1>|<(.*) \/>/
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
匹配首尾空格的正则表达式:(^\s*)|(\s*$)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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String.prototype.trim = function()
{
return this.replace(/(^\s*)|(\s*$)/g, "");
}
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利用正则表达式分解和转换IP地址:
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
下面是利用正则表达式匹配IP地址,并将IP地址转换成对应数值的javascript程序:
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
function IP2V(ip)
{
re=/(\d+)\.(\d+)\.(\d+)\.(\d+)/g //匹配IP地址的正则表达式
if(re.test(ip))
{
return RegExp.$1*Math.pow(255,3))+RegExp.$2*Math.pow(255,2))+RegExp.$3*255+RegExp.$4*1
}
else
{
throw new Error("Not a valid IP address!")
}
}
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
不过上面的程序如果不用正则表达式,而直接用split函数来分解可能更简单,程序如下:
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
var ip="10.100.20.168"
ip=ip.split(".")
alert("IP值是:"+(ip[0]*255*255*255+ip[1]*255*255+ip[2]*255+ip[3]*1))
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