CSLA .NET

I'm using the CSLA.NET 3.5.1 version.  I tried changing the RoleList class from Project Tracker to point to my database roles table which uses a Guid for the RoleId instead of integer.  When I use the following code in my class  I get a InvalidCastException

Unable to cast object of type 'System.Collections.Generic.List`1[Csla.NameValueListBase`2+NameValuePair[System.Int32,System.String]]' to type 'System.Collections.Generic.IList`1[Csla.NameValueListBase`2+NameValuePair[System.Guid,System.String]]'.

using Csla;
using Csla.Data;
using System;
using System.Linq;

namespace ProjectTracker.Library
{
    [Serializable()]
    public class RoleList : NameValueListBase<Guid, string>
    {
        #region  Business Methods

        public static Guid DefaultRole()
        {
            RoleList list = GetList();
            if (list.Count > 0)
                return list.Items[0].Key;
            else
                throw new NullReferenceException("No roles available; default role can not be returned");
        }

        #endregion

        #region  Factory Methods

        private static RoleList _list;

        public static RoleList GetList()
        {
            if (_list == null)
                _list = DataPortal.Fetch<RoleList>();
            return _list;
        }

        /// <summary>
        /// Clears the in-memory RoleList cache
        /// so the list of roles is reloaded on
        /// next request.
        /// </summary>
        public static void InvalidateCache()
        {
            _list = null;
        }

        private RoleList()
        { /* require use of factory methods */ }

        #endregion

        #region  Data Access

        private void DataPortal_Fetch()
        {
            this.RaiseListChangedEvents = false;
            using (var ctx = ContextManager<ProjectTracker.DalLinq.AspNetDbDataContext>.GetManager(ProjectTracker.DalLinq.Database.AspNetDb))
            {
                var data = from role in ctx.DataContext.aspnet_Roles
                           select new NameValuePair(role.RoleId, role.RoleName);
                IsReadOnly = false;
                this.AddRange(data);
                IsReadOnly = true;
            }
            this.RaiseListChangedEvents = true;
        }

        #endregion

    }
}

Any help on this matter would be greatly appreciated.

Thanks,

Kent

ktran:

Unable to cast object of type 'System.Collections.Generic.List`1[Csla.NameValueListBase`2+NameValuePair[System.Int32,System.String]]' to type 'System.Collections.Generic.IList`1[Csla.NameValueListBase`2+NameValuePair[System.Guid,System.String]]'.

Somewhere in your code you still have a field or class declared as NameValueListBase<int,string> - the exeption is quite clear on that

In fact, it appears that your actual type must be declared as an <int, string> and your field is of <guid, string> - and of course you can't cast the former to the latter.

Thanks for you reply Rocky.  To clarify are you saying that the NameValueListBase has to be a

<int, string> pair or can you use it for <guid, string> or whatever combonation of data types?  Because there is nowhere in my new project that declares NameValueListBase<int,string>.  I've checked the Dbml File for my Linq to Sql classes and the fields I'm using are the expected data types <guid, string>

kent

Thanks Rocky, I got it worked out, stupid mistake I overlooked.

I really appreciate your prompt replies :)

Kent