[Solved] Circular Reference Error - Internal Run Time Error 500 at Run time

[Himanshu]

hi !
i am using Telerik Grid Control For ASP.NET MVC 3 using Entity Framework . I am facing the Internal Server Error 500 showing Circular reference Error when i debug in FireBug Software. i am making My Database Table Class Through Entity Framework

I Have all the Videos and Read out the Documentation Given By Telerik . i Have Also Checked Several Link Provided by Telerik i can get Any Solution but no solution Found. I also Check the Solution Provided by you in documentation and Forum .

http://www.telerik.com/help/aspnet-mvc/telerik-ui-components-grid-troubleshooting.html 



When i run my Code it run Successfully but in Browser it Gives Internal Server Error 500 

Error Code Preview ; 

Server Error in '/' Application.

A circular reference was detected while serializing an object of type 'System.Data.Entity.DynamicProxies.Product_D025CC9F846934B9148153EEB70F22BE0EBE70F9C243228A88436A18461B7A00'.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: A circular reference was detected while serializing an object of type 'System.Data.Entity.DynamicProxies.Product_D025CC9F846934B9148153EEB70F22BE0EBE70F9C243228A88436A18461B7A00'.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[InvalidOperationException: A circular reference was detected while serializing an object of type 'System.Data.Entity.DynamicProxies.Product_D025CC9F846934B9148153EEB70F22BE0EBE70F9C243228A88436A18461B7A00'.]
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +1549
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +194
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeCustomObject(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +502
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +1424
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +194
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeCustomObject(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +282
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +1424
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +194
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeEnumerable(IEnumerable enumerable, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +126
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +1380
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +194
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeDictionary(IDictionary o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +527
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +1319
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +194
   System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, StringBuilder output, SerializationFormat serializationFormat) +26
   System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, SerializationFormat serializationFormat) +74
   System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj) +6
   System.Web.Mvc.JsonResult.ExecuteResult(ControllerContext context) +216
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult) +13
   System.Web.Mvc.<>c__DisplayClass1c.<InvokeActionResultWithFilters>b__19() +23
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +260
   System.Web.Mvc.<>c__DisplayClass1e.<InvokeActionResultWithFilters>b__1b() +19
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +177
   System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +343
   System.Web.Mvc.Controller.ExecuteCore() +116
   System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +97
   System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10
   System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +37
   System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +21
   System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +12
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
   System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +50
   System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7
   System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +60
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8970061
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272

LAYOUT.cshtml Code : 

<html>
<head>
    <meta charset="utf-8" />
    <title>@ViewBag.Title</title>
    <script src="../../Scripts/jquery-1.7.1.min.js" type="text/javascript"></script>
    <script src="../../Scripts/jquery.validate.min.js" type="text/javascript"></script>
     @(Html.Telerik().StyleSheetRegistrar()
                      .DefaultGroup(group => group
                          .Add("telerik.examples.css")
                          .Add("telerik.common.css")
                          .Add("telerik.Black.css")
                          .Add("telerik.rtl.css")
                         ))
</head>

<body>
    @RenderBody()

   @(Html.Telerik().ScriptRegistrar()
                     .DefaultGroup(group => group
                         .Add("telerik.examples.js")
                         .Compress(true))
                     .OnDocumentReady(
                     @<text>
                         prettyPrint();
                     </text>)
    )
</body>
</html>

Index.cshtml Code Preview  : 

@model CommerceSuite.Data.Product
 @{
    ViewBag.Title = "Index";
}

<h2>AJAX BINDING</h2>




@(Html.Telerik().Grid<CommerceSuite.Data.Product>("PRODUCT")

            .Name("Grid")
                     .Columns(columns =>
                     {
                         columns.Bound(o => o.ProductId).Title("ID").Width(100);
                         columns.Bound(o => o.Title).Title("Name");
                         columns.Bound(o => o.CategoryId).Title("CategoryID");
                     })
                .DataBinding(d => d
                    .Ajax()
                    .Select("AjaxGrid", "PRODUCT11")
                )
            .Pageable()
            .Sortable()
            .Filterable()
            .Groupable()



      )

Product11Controller Code Preview:

using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Data.Entity;
using System.Data.Linq;
using System.Linq;
using System.ServiceModel;
using System.Web;
using System.Web.Caching;
using System.Web.Mvc;
using Telerik.Web.Mvc.UI;
using Telerik.Web.Mvc;
using CommerceSuite.Data;


namespace CommerceSuite.Web.Administration.Controllers
{
    public class PRODUCT11Controller : Controller
    {

      public CommerceSuiteWMDBEntities db = new CommerceSuiteWMDBEntities();

        //
        // GET: /PRODUCT11/

        public ViewResult Index()
        {

        ViewData["PRODUCT"] = db.Products.ToList();
            return View( );

        }

     [GridAction]
        public ActionResult AjaxGrid()
        {

            return View(new GridModel(db.Products));

        }


        // GET: /PRODUCT11/Details/5

        public ViewResult Details(long id)
        {
            Product product = db.Products.Find(id);
            return View(product);
        }

        //
        // GET: /PRODUCT11/Create

        public ActionResult Create()
        {
            return View();
        }

        //
        // POST: /PRODUCT11/Create

        [HttpPost]
        public ActionResult Create(Product product)
        {
            if (ModelState.IsValid)
            {
                db.Products.Add(product);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            return View(product);
        }

        //
        // GET: /PRODUCT11/Edit/5

        public ActionResult Edit(long id)
        {
            Product product = db.Products.Find(id);
            return View(product);
        }

        //
        // POST: /PRODUCT11/Edit/5

        [HttpPost]
        public ActionResult Edit(Product product)
        {
            if (ModelState.IsValid)
            {
                db.Entry(product).State = EntityState.Modified;
                db.SaveChanges();
                return RedirectToAction("Index");
            }
            return View(product);
        }

        //
        // GET: /PRODUCT11/Delete/5

        public ActionResult Delete(long id)
        {
            Product product = db.Products.Find(id);
            return View(product);
        }

        //
        // POST: /PRODUCT11/Delete/5

        [HttpPost, ActionName("Delete")]
        public ActionResult DeleteConfirmed(long id)
        {
            Product product = db.Products.Find(id);
            db.Products.Remove(product);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

        protected override void Dispose(bool disposing)
        {
            db.Dispose();
            base.Dispose(disposing);
        }

        public IQueryable<Product> Pro { get; set; }
    }
}

Kindly Provide me Solution . I Have tried all the possible Way . But stil i am getting same Error.