MultipleRegularExpressionAttribute MVC中扩展自定义验证规则

好久都没有写博客，最近工作中没有什么可写的，公司的项目是以业务为重，技术含量实在不咋的。这次sprint中有一个要求就是password必须一些规则，比如给你一些正则表达式必须满足几个，直接看效果吧

代码如下：

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namespace System.ComponentModel.DataAnnotations {     using System;     using System.Collections.Generic;     using System.Linq;     using System.Web;     using System.Web.Mvc;     using System.Runtime.CompilerServices;     using Text.RegularExpressions;        using Globalization;     [AttributeUsage(AttributeTargets.Parameter | AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false)]     public class MultipleRegularExpressionAttribute : ValidationAttribute, IClientValidatable     {         public MultipleRegularExpressionAttribute(string[] patterns,int minMatchNo)         {             if (patterns == null || patterns.Length < 1)             {                 throw new ArgumentNullException("patterns");             }             if (minMatchNo <= 0)             {                 throw new ArgumentException("minValidCount must bigger than 0");             }             MinMatchNo = minMatchNo;             Regexs = new Regex[patterns.Length];             for (int i = 0; i < patterns.Length; i++)             {                 Regexs[i] = new Regex(patterns[i]);             }         }           public override string FormatErrorMessage(string name)         {             if (!string.IsNullOrEmpty(ErrorMessage))             {                 return ErrorMessage;             }             string message = "the input value must match " + MinMatchNo.ToString() + " below Regex:";             foreach (var item in Regexs)             {                 message += " \""+item.ToString() + "\" ;";             }             return message;         }           public override bool IsValid(object value)         {             string str = Convert.ToString(value, CultureInfo.CurrentCulture);             if (string.IsNullOrEmpty(str))             {                 return true;             }             int validedCount = 0;             foreach (var reg in Regexs)             {                 Match match = reg.Match(str);                 if ((match.Success && (match.Index == 0)) && (match.Length == str.Length))                     validedCount += 1;             }                          return validedCount>= MinMatchNo;         }           private Regex[] Regexs { set; get; }         private int MinMatchNo { set; get; }         public IEnumerable<ModelClientValidationRule>   GetClientValidationRules(ModelMetadata metadata, ControllerContext context)         {             var validationRule = new ModelClientValidationRule             {                 ErrorMessage = FormatErrorMessage(metadata.DisplayName),                 ValidationType = "mulregular",             };             validationRule.ValidationParameters.Add("minmatchno", MinMatchNo);             validationRule.ValidationParameters.Add("regexs", string.Join(",",Regexs.Select(x=>x.ToString()).ToArray()));               yield return validationRule;         }     } }

　　

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<script type="text/javascript" src="~/Scripts/jquery-1.10.2.js"></script> <script type="text/javascript" src="~/Scripts/jquery.validate.js"></script> <script type="text/javascript" src="~/Scripts/jquery.validate.unobtrusive.js"></script> <script type="text/javascript">     $(function () {         //第一个参数是jquery验证扩展方法名         //第二个参数与rule.ValidationParameters["XXX"]中的key对应         //option是指ModelClientValidationRule对象实例         jQuery.validator.unobtrusive.adapters.add('mulregular', ['regexs', 'minmatchno'], function (options) {             options.rules["mulregular"] = {                 regexs: options.params.regexs,                 minmatchno: options.params.minmatchno             };             if (options.message) {                 options.messages['mulregular'] = options.message;             }         });           //意思是表单值为空时也能通过验证         //但，如果表单有值，就必须满足||后面的条件，否则返回false     jQuery.validator.addMethod('mulregular', function (value, element, param) {         if (this.optional(element)) {             return true;         }         var regs = param["regexs"].split(",");         var minmatchno = param["minmatchno"] - 0;         for (var i = 0; i < regs.length; i++) {             var match = new RegExp(regs[i]).exec(value);             if (match && (match.index === 0) && (match[0].length === value.length)) {                 minmatchno -= 1;             }         }         return minmatchno <= 0;     });         }); </script>

　　

[Required]
[DataType(DataType.Password)]
[Display(Name = "Password")]
[MultipleRegularExpression( new string[] {".*[a-z]+.*",".*[A-Z]+.*",".*\\d+.*",".*(\\W+|_+).*" },3)]
public string Password { get; set; }

 

这里有几个注意的地方：

1.GetClientValidationRules 方法里面ValidationType和ValidationParameters的key只能是全部小写

2.只有在 jQuery.validator.unobtrusive.adapters 方法中定义了的参数 ['regexs', 'minmatchno'] 才能在 jQuery.validator.addMethod 对应的方法mulregular 中使用。

网上的案例已经有很多了，大家也可以参考：

http://www.cnblogs.com/yehuabin/archive/2012/09/23/unobtrusive-validation.html

http://www.cnblogs.com/xcsn/p/4666718.html

http://www.cnblogs.com/xfrog/archive/2011/01/25/1944867.html