c# - Ajax Posting complex object to MVC controller -

i want post complex object mvc controller.

my code post controller

         var url = "/admin/addevent"          $.ajax({             type: "post",             contenttype: 'application/json',             datatype: "json",             url: url,             data: mynewevent,             success: success         });          function success() {             alert("success");         } 

the following object gets posted , recognised , parsed object @ controller:

var mynewevent = json.stringify({         id: 0,         name: 'asdasd',         description: 'description',         datetime: new date().toisostring(),         owner: 1, duration: 30,         reoccuringtype: 0     }); 

the following object not

    var url = "/admin/addevent"     var mynewevent = json.stringify({         id: 0,         name: 'asdasd',         description: 'description',         datetime: new date().toisostring(),         owner: 1, duration: 30,         reoccuringtype: 0,         membershiptype: {             id: 1,             name: 'test'         }     }); 

the c# controller

[httppost] public jsonresult addevent(event mynewevent) {     return json(new { success = true, description = "added" }); } 

the following event object should parse into

public class event {     public int id { get; set; }     public string name { get; set; }     public string description { get; set; }     public datetime datetime { get; set; }     public user owner { get; set; }     public user instructor { get; set; }     public int maxattendance { get; set; }     public int duration { get; set; }     public int reoccuringtype { get; set; }     public membershiptype membershiptype { get; set; }     public organisation organisation { get; set; } }  public class membershiptype {     public int id { get; set; }     public string name { get; set; }     public membershiptype(bo.membershiptype membershiptype)     {         this.id = membershiptype.id;         this.name = membershiptype.name;     }  } 

it seems controller cannot recognise membership object.... suggestions why?

thanks

ok solved issue , fair trying solve detail had provided above, not able to. (i have updated now). in short membershiptype object needed parameterless constructor had 1 took parameter

public class membershiptype {     public int id { get; set; }     public string name { get; set; }     public membershiptype(bo.membershiptype membershiptype)     {         this.id = membershiptype.id;         this.name = membershiptype.name;     }  } 

when inspected error fiddler error server side "no parameterless constructor defined object. " once put in parameter less constructor solved problem.

public class membershiptype {     public int id { get; set; }     public string name { get; set; }     public membershiptype(bo.membershiptype membershiptype)     {         this.id = membershiptype.id;         this.name = membershiptype.name;     }      public membershiptype()     {     } }