Question

I have a GridView that is bound to an Entity Framework object. I want to access the object in the RowDataBound event of the GridView. When I try to access the DataItem object i get an error stating Unable to cast object of type ‘System.Data.Objects.MaterializedDataRecord’ to type ‘BBM.NailArtGallery.Model.Item’. Apparently the MaterializedDataRecord is some hidden property. Does anyone know how to get around this. My GridView is bound using and EntityDataSource Control. The code is below.

<asp:EntityDataSource ID="EntityDataSource1" runat="server" AutoPage="true" AutoSort="true" OrderBy="it.ID"
    ConnectionString="name=Entities" DefaultContainerName="Entities" 
    EntitySetName="Items" EntityTypeFilter="ItemImage"  
    Select="it.[ID], it.[Title], it.[IsFeatured], it.[ImageHome], it.[DateEntered]">
</asp:EntityDataSource>

if (e.Row.RowType == DataControlRowType.DataRow)
        {          
            ICustomTypeDescriptor descriptor = (ICustomTypeDescriptor)e.Row.DataItem;
            if (descriptor != null)
            {
                var prop = (PropertyDescriptor)descriptor.GetProperties()[0];
                Item image = (Item)descriptor.GetPropertyOwner(prop);

            }

        }

Answer 1

According to Reflector, MaterializedDataRecord is a internal class that inherits DbDataRecord, so you can access its properties with the GetInt32, GetString, GetDateTime etc methods, or through the indexer