public class RemoteUser
 { 
 public string Name { get; set; } 
 public string Email { get; set; }
 
 }

 public static class MyRemoteStaticData
 {
 public static List<RemoteUser> RemoteList
 {
 get
 {
 return new List<RemoteUser>()
 {
 new RemoteUser(){Name="Daniel",Email="Daniel@163.com"},
 new RemoteUser(){Name="CFS",Email="CFS@163.com"}
 };
 }

 }
 }

using Server_Side_Validation_IN_MVC.StaticData;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace Server_Side_Validation_IN_MVC.Controllers
{
 public class MyRemoteController : Controller
 {
 // GET: MyRemote
 public JsonResult RemoteValidate(string name) //这里的参数名字，必须要和视图中文本框控件的名字一样，但大小写无所谓
 {
 //如果存在用户名,即isExists=true
 bool isExists = MyRemoteStaticData.RemoteList.
 Where(s => s.Name.ToLowerInvariant().
  Equals(name.ToLower())).FirstOrDefault() != null;
 //就向前台返回false，表明已经存在userName
 return Json(!isExists,JsonRequestBehavior.AllowGet);
 }

 

 
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace Server_Side_Validation_IN_MVC.Models
{
 public class RemoteUser
 {
 [Remote("RemoteValidate", "MyRemote", ErrorMessage = "抱歉用户名已经存在！请重新输入！！！")]
 public string Name { get; set; }

 
 public string Email { get; set; }

 
 }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace Server_Side_Validation_IN_MVC.Controllers
{
 public class UserController : Controller
 {
 

 public ActionResult AddRemoteUser()
 {
 return View();
 }
 }
}

@model Server_Side_Validation_IN_MVC.Models.RemoteUser

@{
 ViewBag.Title = "AddRemoteUser";
}

<h2>AddRemoteUser</h2>


@using (Html.BeginForm()) 
{
 @Html.AntiForgeryToken()
 
 <div class="form-horizontal">
 <h4>RemoteUser</h4>
 <hr />
 @Html.ValidationSummary(true, "", new { @class = "text-danger" })
 <div class="form-group">
 @Html.LabelFor(model => model.Name, htmlAttributes: new { @class = "control-label col-md-2" })
 <div class="col-md-10">
 @Html.EditorFor(model => model.Name, new { htmlAttributes = new { @class = "form-control" } })
 @Html.ValidationMessageFor(model => model.Name, "", new { @class = "text-danger" })
 </div>
 </div>

 <div class="form-group">
 @Html.LabelFor(model => model.Email, htmlAttributes: new { @class = "control-label col-md-2" })
 <div class="col-md-10">
 @Html.EditorFor(model => model.Email, new { htmlAttributes = new { @class = "form-control" } })
 @Html.ValidationMessageFor(model => model.Email, "", new { @class = "text-danger" })
 </div>
 </div>

 

 <div class="form-group">
 <div class="col-md-offset-2 col-md-10">
 <input type="submit" value="Create" class="btn btn-default" />
 </div>
 </div>
 </div>
}

<div>
 @Html.ActionLink("Back to List", "Index")
</div>

<script src="~/Scripts/jquery-1.10.2.min.js"></script>
<script src="~/Scripts/jquery.validate.min.js"></script>
<script src="~/Scripts/jquery.validate.unobtrusive.min.js"></script>

public static void RegisterRoutes(RouteCollection routes)
 {
 routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

 routes.MapRoute(
 name: "Default",
 url: "{controller}/{action}/{id}",
 defaults: new { controller = "User", action = "AddRemoteUser", id = UrlParameter.Optional }
 );
 }

using Server_Side_Validation_IN_MVC.StaticData;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace Server_Side_Validation_IN_MVC.Controllers
{
 public class MyRemoteController : Controller
 {
 // GET: MyRemote
 public JsonResult RemoteValidate(string name) //这里的参数名字，必须要和视图中文本框控件的名字一样，但大小写无所谓
 {
 //如果存在用户名,即isExists=true
 bool isExists = MyRemoteStaticData.RemoteList.
 Where(s => s.Name.ToLowerInvariant().
  Equals(name.ToLower())).FirstOrDefault() != null;
 //就向前台返回false，表明已经存在userName
 return Json(!isExists,JsonRequestBehavior.AllowGet);
 }


 public JsonResult RemoteValidationAddtional(string name, string email)
 {
 //如果存在用户名,即isExists=true
 bool isExists = MyRemoteStaticData.RemoteList.
 Where(s => s.Name.ToLowerInvariant().
  Equals(name.ToLower()) && s.Email.ToLowerInvariant().Equals(email.ToLower())).FirstOrDefault() != null;
 //就向前台返回false，表明已经存在userName
 return Json(!isExists, JsonRequestBehavior.AllowGet);
 }
 }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace Server_Side_Validation_IN_MVC.Models
{
 public class RemoteUser
 {
 [Remote("RemoteValidate", "MyRemote", ErrorMessage = "抱歉用户名已经存在！请重新输入！！！")]
 public string Name { get; set; }

 //注意，这里的AdditionalFields="Name"，Name字段必须和Modle中的字段完全一样
 [Remote("RemoteValidationAddtional", "MyRemote", AdditionalFields = "Name", ErrorMessage = "抱歉Email已经存在！请重新输入！！！")]
 public string Email { get; set; }

 } 
 }