"You're trying to decode an invalid JSON String: Ext.Net.MVC.StoreResult"

[breakyoheart]

I just updated my project to EXT.NET v2 from v1.3 on MVC 4.
I am getting following error message when using AjaxProxy.

You're trying to decode an invalid JSON String: Ext.Net.MVC.StoreResult

I have no idea what I am doing wrong.

Controller

Imports Ext.Net.MVC

Public Class DataController
    Inherits System.Web.Mvc.Controller

    Public Function GetProspects() As ActionResult
        Dim db As LinqPricingDataContext = New LinqPricingDataContext
        Dim query = From p In db.tbl_PROSPECTs Where p.ProspectID = 1 Select p.Prospect
        Return New StoreResult(query)
    End Function

End Class

aspx

<form runat="server">

        <ext:ResourceManager runat="server" />

        <ext:Button ID="Button1" runat="server" Text="Reload">
            <Listeners>
                <Click Handler="#{gpProspect}.getStore().reload();" />
            </Listeners>
        </ext:Button>

        <ext:GridPanel 
            ID="gpProspect" 
            runat="server">
            <Store>
                <ext:Store runat="server">
                    <Model>
                        <ext:Model runat="server">
                            <Fields>
                                <ext:ModelField Name="Prospect" />
                            </Fields>
                        </ext:Model>
                    </Model>
                    <Proxy>
                        <ext:AjaxProxy Url="/Data/GetProspects">
                            <Reader>
                                <ext:JsonReader Root="data" />
                            </Reader>
                            <Listeners>
                                <Exception Handler="alert(operation.getError());" />
                            </Listeners>
                        </ext:AjaxProxy>
                    </Proxy>
                </ext:Store>
            </Store>
            <ColumnModel runat="server">
                <Columns>
                    <ext:Column ColumnID="cProspect" runat="server" DataIndex="Prospect" Text="Legal Entity"></ext:Column>
                </Columns>
            </ColumnModel>
        </ext:GridPanel>
    </form>

[Vladimir]

Please see the following topic
http://forums.ext.net/showthread.php...ll=1#post84656

[breakyoheart]

Please see the following topic
http://forums.ext.net/showthread.php...ll=1#post84656

I check on my root web.config. The elements exist. See below

<runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0" newVersion="2.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-2.0.0.0" newVersion="2.0.0.0" />
        <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" />
        <bindingRedirect oldVersion="1.0.0.0-4.0.0.0" newVersion="4.5.7" />
        <assemblyIdentity name="Ext.Net.Utilities" publicKeyToken="2c34ac34702a3c23" />
        <bindingRedirect oldVersion="0.0.0.0-2.0.0" newVersion="2.0.1" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>

I just want use proxy to populate the grid. Is there anything I am doing wrong here?
Is this a MVC 4 Problem? Would it work in MVC 3?

[Vladimir]

Please post response for store request (you can copy it from Fiddler)

[breakyoheart]

Respone is raw format:

HTTP/1.1 200 OK
Server: ASP.NET Development Server/10.0.0.0
Date: Tue, 03 Jul 2012 14:57:05 GMT
X-AspNet-Version: 4.0.30319
X-AspNetMvc-Version: 4.0
Cache-Control: private
Content-Type: text/html; charset=utf-8
Content-Length: 23
Connection: Close

Ext.Net.MVC.StoreResult

It seems like there are no JSON data in response only the text "Ext.Net.MVC.StoreResult"

[breakyoheart]

I just try the same code in MVC 3 and it works.
Does Proxy just not work on MVC 4?

[Vladimir]

The single required thing for MVC4 is change for web.config (mentioned in first post)
I see that your web.config part of assembly bindings is different then in my post, please use exactly as in my post