MVC3----Custom Client validation

1, Custom validation class:

Using system;using system.collections.generic;using system.linq;using system.web;using  system.componentmodel.dataannotations;using system.web.mvc;namespace schoolmanagedomw.models{     public class zdmaxlength : validationattribute,iclientvalidatable     {        private int MaxLength;         public zdmaxlength (int maxlength)              : base ("{0} character length is too long")          {            this. maxlength = maxlength;        }         /// <summary>        ///  Service-Side validation method          /// </summary>        /// <param name= " Value "></param>        /// <param name=" Validationcontext "></param>        /// <returns> </returns>        protected override validationresult  isvalid (Object value, validationcontext validationcontext)          {            if  (value  != null)             {                 if  (Convert.ToInt32 (value. ToString (). Length)  > maxlength)                 &nbsP {                     return new validationresult (Formaterrormessage (validationcontext.displayname));                 }             }             return ValidationResult.Success;        }          #region  IClientValidatable  Members          /// <summary>        ///  Implements the Iclientvalidatable interface. Client Authentication Methods         /// </summary>         /// <param name= "Metadata" ></param>         /// <param name= "Context" ></param>         /// <returns></returns>        public  Ienumerable<modelclientvalidationrule> getclientvalidationrules (modelmetadata metadata,  Controllercontext context)         {             var rule = new modelclientvalidationrule ();             rule. Errormessage = formaterrormessage ("Client"  + metadata. GetDisplayName ());             rule. validationtype =  "Zdmaxlength";             rule. Validationparameters.add ("MaxLength",  maxlength);             yield return rule;        }          #endregion     }}

2, use custom validation classes:

[Zdmaxlength (3)]public string Name {get; set;}

3, View Code:

①: You need to reference two scripts and a custom script:

<script type= "Text/javascript" src= "@Url. Content (" ~/scripts/jquery.validate.min.js ")" ></script>

<script type= "Text/javascript" src= "@Url. Content (" ~/scripts/jquery.validate.unobtrusive.min.js ")" ></ Script>

<script type= "Text/javascript" src= "@Url. Content (" ~/scripts/zd.js ")" ></script>

②:zd.js

Code hint///<reference path= "jquery-1.5.1-vsdoc.js"/>///<reference path= "Jquery.validate.js"/>///< Reference path= "Jquery.validate.unobtrusive.js"/>//zdmaxlength: Validator name, need to match Validationtype//value: Enter value//element:        INPUT element//zdmaxlength: Validation parameter $.validator.addmethod ("Zdmaxlength", function (value, element, Zdmaxlength) {if (value) {            if (value.tostring (). length > Zdmaxlength) {alert (value.tostring (). Length + "." + zdmaxlength);        return false; }}); $.validator.unobtrusive.adapters.addsingleval ("Zdmaxlength", "maxlength");

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MVC3----Custom Client validation