如果平时不习惯写javascript的情况下，使用jquery validator写起来就是比较头痛的事情，为了解决这一问题所以写了个针对jquery validator 的c# helper。使用helper后编写验证就能得到VS.NET的支持主要是提供感知功能方便编写。

<%=Script.DotNet.JQueryHelper.Validate("signupForm")        .Add("firstname", i => { i.required("Please enter your firstname"); })        .Add("lastname", i => { i.required("Please enter your lastname"); })        .Add("username", i => { i.required("Please enter a username").minlength(2, "Your username must consist of at least 2 characters"); })        .Add("password", i => { i.required("Please provide a password").minlength(5,"Your password must be at least 5 characters long"); })        .Add("confirm_password", i => { i.required("Please provide a password").minlength(5, "Your password must be at least 5 characters long").equalTo("Please enter the same password as above"); })        .Add("email", i => { i.required().email(); })        .Add("topic", i => { i.required("#newsletter:checked", null).minlength(2); })        .Add("agree", i => { i.required(); })        %>

如果用javascript描述如下：

从代码上来看是不是helper会简洁很多:) helper完整代码如下:

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Text;namespace Script.DotNet{    public class JQueryHelper    {        public static Validate Validate(string name)        {            return new Validate(name);        }           }    public class Validate    {        private string mName;        public Validate(string id)        {            mName = id;                   }        private List
    
      mItems = new List
     
      (8);        public Validate Add(string name, Action
      
        addaction)        {            ValidateItem item = new ValidateItem(name);            mItems.Add(item);            addaction(item);            return this;        }        public override string ToString()        {            StringBuilder sb = new StringBuilder();            ValidateItem item;            sb.Append("
       \r\n");            return sb.ToString();        }    }    public class ValidateItem    {                     public ValidateItem(string name)        {            Name = name;            HasMessage = false;        }        public string Name { get; set; }        public ValidateItem required()        {            return AddType("required", "true", null);        }        public ValidateItem required(string message)        {            return AddType("required", "true", message);        }        public ValidateItem required(string value,string message)        {            return AddType("required", "'"+value+"'", message);        }        public ValidateItem remote(string url)        {            return AddType("remote", url, null);        }        public ValidateItem remote(string url, string message)        {            return AddType("remote", url, message);        }        public ValidateItem remote(string url, string dataexpression, string message)        {            return AddType("remote", string.Format("{url:'{0}',data:{1}}", url, dataexpression), message);        }        public ValidateItem email()        {            return AddType("email", "true", null);        }        public ValidateItem email(string message)        {            return AddType("email", "true", message);        }        public ValidateItem url()        {            return AddType("url", "true", null);        }        public ValidateItem url(string message)        {            return AddType("url", "true", message);        }        public ValidateItem date()        {            return AddType("date", "true", null);        }        public ValidateItem date(string message)        {            return AddType("date", "true", message);        }        public ValidateItem dateISO()        {            return AddType("dateISO", "true", null);        }        public ValidateItem dateISO(string message)        {            return AddType("dateISO", "true", message);        }        public ValidateItem number()        {            return AddType("number", "true", null);        }        public ValidateItem number(string message)        {            return AddType("number", "true", message);        }        public ValidateItem digits()        {            return AddType("digits", "true", null);        }        public ValidateItem digits(string message)        {            return AddType("digits", "true", message);        }        public ValidateItem creditcard()        {            return AddType("creditcard", "true", null);        }        public ValidateItem creditcard(string message)        {            return AddType("creditcard", "true", message);        }        public ValidateItem equalTo(string control)        {            return AddType("equalTo", "'#" + control + "'", null);        }        public ValidateItem equalTo(string control, string message)        {            return AddType("equalTo", "'#"+control+"'", message);        }        /// 
       
        /// $("#myform").validate({        ///     rules: {        ///         field: {        ///             required: true,        ///             accept: "xls|csv"        ///         }        ///      }        ///});        /// 
        /// 
               /// 
               public ValidateItem accept(string type)        {            return AddType("accept", type, null);        }        /// 
       
        /// $("#myform").validate({        ///     rules: {        ///         field: {        ///             required: true,        ///             accept: "xls|csv"        ///         }        ///      }        ///});        /// 
        /// 
               /// 
               /// 
               public ValidateItem accept(string type, string message)        {            return AddType("accept", type, message);        }        public ValidateItem maxlength(int length)        {            return AddType("maxlength", length, null);        }        public ValidateItem maxlength(int length, string message)        {            return AddType("maxlength", length, message);        }        public ValidateItem minlength(int length)        {            return AddType("minlength", length, null);        }        public ValidateItem minlength(int length, string message)        {            return AddType("minlength", length, message);        }        public ValidateItem rangelength(int min,int max)        {            return AddType("rangelength", string.Format("[{0},{1}]",min,max), null);        }        public ValidateItem minlength(int min, int max, string message)        {            return AddType("rangelength", string.Format("[{0},{1}]", min, max), message);        }        public ValidateItem range(object min, object max)        {            return AddType("range", string.Format("[{0},{1}]", min, max), null);        }        public ValidateItem range(object min, object max, string message)        {            return AddType("range", string.Format("[{0},{1}]", min, max), message);        }        public ValidateItem max(object value)        {            return AddType("max", value, null);        }        public ValidateItem max(object value, string message)        {            return AddType("max", value, message);        }        public ValidateItem min(object value)        {            return AddType("min", value, null);        }        public ValidateItem min(object value, string message)        {            return AddType("min", value, message);        }        public ValidateItem AddType(ValidateType type, object value)        {            return AddType(Enum.GetName(typeof(ValidateType), type), value, null);        }        public ValidateItem AddType(ValidateType type, object value, string message)        {            return AddType(Enum.GetName(typeof(ValidateType), type), value, message);        }        public bool HasMessage        {            get;            set;        }        public ValidateItem AddType(string type, object value, string message)        {            ValidateSubItem item = new ValidateSubItem { Name = type, Message = message, Value = value };            if (!string.IsNullOrEmpty(item.Message))                HasMessage = true;            Items.Add(item);            return this;        }        private IList
       
         mItems = new List
        
         ();        public IList
         
           Items { get { return mItems; } } public class ValidateSubItem { public string Name; public object Value; public string Message; } } public enum ValidateType { required, remote, email, url, date, dateISO, number, digits, creditcard, equalTo, accept, maxlength, minlength, rangelength, range, max, min }}