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：

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;
        }
    }
}

　　

<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