MVC (Connection database) button unique validation

(a) contyolles         public actionresult checkuserid (string  id)        {         //   string[] s = new string[] {"1", "2", "3"};            BOOL New ZHUCEBF (). Yanzheng (ID);             = IsOK;             return   Partialview ();        }                

  (ii) model   public  bool  Yanzheng ( ID) {
     var  query = Context.zhuce.Where (p=>p.userid==            id);  if  (query.) Count () >0  ) { return  false  ;  return  true  ; }

(iii) view@{    "checkuserid";     @{        bool IsOK = (bool) Viewbag.data;         if(IsOK)        {                   <div> ask you to start registering </div>        }          else        {            <div> user name already exists </div>        }    }<

(d) Show this button on the home page"Viewport"Content="Width=device-width"/> <title>Add</title> <script src= "~/js/jquery-1.7.1.min.js" ></script> <script langugage= "JavaScript" > Func            tion Checkuid () {var s = $ ("#userID"). Val ();        $ ("#ss"). Load ("/home/checkuserid/" + s); } </script> (iv) The following view interface<tr>@using (Html.BeginForm ("Insert", "Home", FormMethod.Post)) {<td>                 <div id= "DD" ></div> @using (Html.BeginForm ("," ")) {<div> @Html. TextBox ("UserID") <input type= "button" value= "Check unique" onclick= "Checkuid ()"/> <span id= "ss" >& Lt;/span> </div>}</td> <td> @Html. TextBox ("UserName",NULL) </td><br/> <td> @Html. Password ("userpwd") </td><br/> <td> @Html. Password ("Mima") </td><br/> <td> <input type="Submit"Value="Register"></td>                     }   </tr>

★(v) Add a JS file, add the use JS

MVC (Connect database) button unique validation