LLB v2.6 Final 2.6.10.930 Adapter template

Using an LLBLGenProDataSource2 with LivePersistence="false", I am trying to fill the ContainedCollection in the PerformSelect handler:

        protected void LLBLGenProDataSource21_PerformSelect(object sender, PerformSelectEventArgs2 e)
        {
            var q = CreateLinq().TakePage(e.PageNumber, e.PageSize);
            var regulationTextEntities = ((ILLBLGenProQuery) q).Execute<EntityCollection<RegulationTextEntity>>();
            e.ContainedCollection.AddRange(regulationTextEntities);
        }

I get the following exception:

c isn't of the right type

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.ArgumentException: c isn't of the right type

Source Error: 


Line 78:             var q = CreateLinq().TakePage(e.PageNumber, e.PageSize);
Line 79:             var regulationTextEntities = ((ILLBLGenProQuery) q).Execute<EntityCollection<RegulationTextEntity>>();
Line 80:             e.ContainedCollection.AddRange(regulationTextEntities);
Line 81:         }
Line 82: 

Source File: D:\Work\DevExpressExample\DevExpressExample.Module\CustomPropertyExample.aspx.cs   Line: 80 

Stack Trace: 


[ArgumentException: c isn't of the right type]
   SD.LLBLGen.Pro.ORMSupportClasses.EntityCollectionBase2`1.SD.LLBLGen.Pro.ORMSupportClasses.IEntityCollection2.AddRange(IEntityCollection2 c) +114
   Examples.DevExpressExample.Module.CustomPropertyExample.LLBLGenProDataSource21_PerformSelect(Object sender, PerformSelectEventArgs2 e) in D:\Work\DevExpressExample\DevExpressExample.Module\CustomPropertyExample.aspx.cs:80
   SD.LLBLGen.Pro.ORMSupportClasses.LLBLGenProDataSource2.OnPerformSelect(PerformSelectEventArgs2 eventArgs) +22
   SD.LLBLGen.Pro.ORMSupportClasses.LLBLGenProDataSourceView2.ExecuteSelectEntityCollection(Int32 pageSize, Int32 pageNumber, DataSourceSelectArguments arguments) +630
   SD.LLBLGen.Pro.ORMSupportClasses.LLBLGenProDataSourceView2.ExecuteSelect(DataSourceSelectArguments arguments) +181
   System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +19
   DevExpress.Web.ASPxClasses.Internal.DataHelper.PerformSelect() +203
   DevExpress.Web.ASPxGridView.GridViewDataHelper.PerformSelect() +173
   DevExpress.Web.ASPxClasses.Internal.DataContainer.PerformSelect() +123
   DevExpress.Web.ASPxClasses.ASPxDataWebControlBase.DataBindCore() +44
   DevExpress.Web.ASPxClasses.ASPxDataWebControlBase.DataBind() +177
   DevExpress.Web.ASPxGridView.ASPxGridView.DataBind() +225
   DevExpress.Web.ASPxClasses.Internal.DataHelperBase.EnsureDataBound(Boolean ensureChildControls) +114
   DevExpress.Web.ASPxClasses.Internal.DataHelperBase.EnsureDataBound() +34
   DevExpress.Web.ASPxClasses.Internal.DataContainer.EnsureDataBound() +126
   DevExpress.Web.ASPxClasses.ASPxDataWebControlBase.OnPreRender(EventArgs e) +47
   System.Web.UI.Control.PreRenderRecursiveInternal() +80
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +842

Version Information: Microsoft .NET Framework Version:2.0.50727.4952; ASP.NET Version:2.0.50727.4955

If I reference the data source by its private name, it works:

        protected void LLBLGenProDataSource21_PerformSelect(object sender, PerformSelectEventArgs2 e)
        {
            var q = CreateLinq().TakePage(e.PageNumber, e.PageSize);
            var regulationTextEntities = ((ILLBLGenProQuery) q).Execute<EntityCollection<RegulationTextEntity>>();
            LLBLGenProDataSource21.EntityCollection = regulationTextEntities;
        }

I am confused by this as in Intellisense, it all looks correct. The .AddRange needs an IEntityCollection2 and I am passing one.

Could it be that I am passing an EntityCollection<T> which ContainedCollection doesn't like?

Is there a downside to using the LLBLGenProDataSource21.EntityCollection approach that will bite me later?

This is the cause and the workaround: http://llblgen.com/tinyforum/Messages.aspx?ThreadID=11607&StartAtMessage=0&#76935

Thanks and sorry. I slipped up on the search and used c isn't of the right type without quotes around it. That returned no results in the forum, whereas with quotes returned several threads.

neilx wrote:

Thanks and sorry. I slipped up on the search and used c isn't of the right type without quotes around it. That returned no results in the forum, whereas with quotes returned several threads.

its ok