ASP. NET MVC 4 Jquery Ajax

Front interface, a drop-down box, a text box <select id= "SEX" > <option> men </option> <option> Women </option> <optio n> unknown </option></select><input id = "DESC" type= "text"/>

Page introduced Js<script type= "Text/javascript" src= ". /.. /scripts/myajax.js ">

All contents of Myajax.js $ (function  ()  {    $ ("#SEX"). Change (function  ()  {     $.ajax ({        type:  "Post",         url:  "/knoledge/find",  //page name (without controller)/background method name to invoke          data:  "{' Sex ': '"  + $ (' #SEX '). Val ()  +  "'}",  / /json format strings in the background, parameter names must be consistent         contentType:  "Application/json; Charset=utf-8 ",        datatype: " JSON ",         success: function  (Result)  {             $ ("#DESC"). attr ("value",  result.id);   //will get the value assigned to the foreground control, where D, If the background returned is not a JSON string, but merely a value, the returned value is included in the attribute named D                   },        error: function  (ERR)  {             alert ("haha");      (   }    });});

Knoledgecontroller Find method public ActionResult find (String sex) {var tempobj = new {            id = "Gender" +sex};        Return Json (Tempobj, jsonrequestbehavior.allowget); }

Just shoot like this.

ASP. NET MVC 4 Jquery Ajax