Ajax submits a JSON string and. Net deserializes it into a model object.

1. Create a model object

 ///   <Summary>      ///  User entity class  ///   </Summary>      Public   Class  Usermodel {  ///   <Summary>          ///  User ID  ///   </Summary>          Public  Long Userid { Get ; Set  ;}  ///   <Summary>          ///  User display name  ///   </Summary>          Public   String Displayname { Get ; Set  ;} ///   <Summary>          ///  User Name  ///   </Summary>          Public   String Realname { Get ; Set  ;}} 

2. Create a JSON serialization help class

/* ===================================================== ========================================================== * Function description: jsonhelper * Creator: RES-WUZHOU * date of creation: 17:17:08 * =================================================== ========================================================== = */using system; using system. collections. generic; using system. LINQ; using system. text; using system. runtime. serialization. JSON; using system. io; using system. web. script. serialization; namespace common {// <summary> /// jsonhelper // </Summary> public class jsonhelper {// <summary> // JSON serialization // </ summary> /// <typeparam name = "T"> </typeparam> /// <Param name = "entity"> </param> /// <returns> </ returns> Public static string jsonserializer <t> (T entity) {var serializer = new javascriptserializer (); Return serializer. serialize (entity );} /// <summary> /// JSON deserialization /// </Summary> /// <typeparam name = "T"> </typeparam> /// <Param name = "jsonstring"> </param> // <returns> </returns> Public static t jsondeserialize <t> (string jsonstring) {var serializer = new javascriptserializer (); Return serializer. deserialize <t> (jsonstring );}}}

Note: manually reference system. Web. Script. serialization. dll

3. backend Cs method

 
Public actionresult add (string strusermodel) {usermodel = jsonhelper. jsondeserialize <usermodel> (strusermodel );//....}
 

4. Front-end Ajax submission

 
VaR usermodel ={}; usermodel. userid = 1; usermodel. displayname = "zhangsan"; usermodel. realname = "Zhang"; $. ajax ({URL: "/user/Add", type: "Post", data: {strusermodel: $. tojson (usermodel)}, success: function (JSON) {alert ('success');}, error: function () {alert ("system exception! ");}});
 

Note: jquery. js and jquery. JSON. js must be referenced on the page.