JSON Circular Reference

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From: kalyan on 17 Sep 2009 13:39

---

I ran into the same problem and THE ONE OF SOLUTION IS to

Use [ScriptIgnore] atribute .. it will solve the problem.

add system.web.extensions reference and add namespace:

Using System.Web.Script.Serialization.

If you still have questions..Read on..for some detailed explanation..

i have a User class with..

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using Iesi.Collections.Generic;

using System.Runtime.Serialization;

namespace RAPortal.Core.Entities

{

public class User

{

private int _userId;

private string _firstName;

private string _lastName;

private IList<Application> _applications;

private IList<Group> _groups;

private IList<ApplicationRequest> _applicationRequests;

Properties..

public virtual int UserId

{

get

{

return _userId;

}

set

{

_userId = value;

}

}

public virtual string Title

{

get

{

return _title;

}

set

{

_title = !String.IsNullOrEmpty(value) ? value.ToUpper().Trim() : null;

}

}

public virtual IList<Group> Groups

{

get

{

return _groups;

}

set

{

_groups = value;

}

}

public virtual IList<UserPrivilege> UserPrivileges

{

get

{

return _userPrivileges;

}

set

{

_userPrivileges = value;

}

}

public virtual IList<UserRole> UserRoles

{

get

{

return _userRoles;

}

set

{

_userRoles = value;

}

}

....so on...

and I have Groups class..

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Script.Serialization;

using System.Runtime.Serialization;

namespace RAPortal.Core.Entities

{

public class Group

{

private int _groupId;

private string _name;

private IList<User> _users;

public virtual int GroupId

{

get

{

return _groupId;

}

set

{

_groupId = value;

}

}

public virtual string Name

{

get

{

return _name;

}

set

{

_name = !String.IsNullOrEmpty(value) ? value.ToUpper().Trim() : null;

}

}

[ScriptIgnore]

public virtual IList<User> Users

{

get

{

return _users;

}

set

{

_users = value;

}

}

}

}

Since User is referenced in the groups.. the json think that it is Circular reference and It will throw an exception..so the fix is to add [ScriptIgnore] on top of the User. And add the reference and namespace to this class like it..

It solved my problem .. I am sure there are better ways out there !!! Cheers...

And remember you should add [scriptIgnore] only in the groups class and not in the Users class..



Posted as a reply to:

Re: Circular Reference. I really need help ... thanks.

"shapper" <mdmoura(a)gmail.com> wrote in message
news:78860aad-2ee6-4156-9bde-fd6d688a69f4(a)w24g2000prd.googlegroups.com...

Without the definition for Json() method, this doesn't tell much.

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