radgrid bind anonymoustype

[Wired_Nerve]

I have a rad grid that I am using the needdatasource event to populate.
I have a linq query that returns a set of information.
I refered to this link for aid: http://www.telerik.com/help/openaccess-orm/openaccess-tasks-howto-execute-query-anonimous-type.html
When I run my code I get an ugly error:
"

DataBinding: 'System.Data.Linq.SqlClient.ObjectReaderCompiler+Group`2[[<>f__AnonymousType1`4[[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]], TIPWebIT, Version=2010.1.415.0, Culture=neutral, PublicKeyToken=null],[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]' does not contain a property with the name 'ItemNumber'.

"

Here is the grid:

 

 

 

<telerik:RadGrid ID="RadGridInventory" runat="server" AllowPaging="True" AllowSorting="True"
          GridLines="None" OnNeedDataSource="RadGridInventory_NeedDataSource"
          AutoGenerateColumns="False">
          <MasterTableView CommandItemDisplay="None">
              <CommandItemSettings ExportToPdfText="Export to Pdf" />
              <Columns>
                  <telerik:GridTemplateColumn DataField="ItemNumber" HeaderText="Product Number" SortExpression="ItemNumber"
                      UniqueName="ItemNumber">
                      <ItemTemplate>
                          <asp:Label ID="ItemNumberLabel" runat="server" SkinID="EditForms" Text='<%# Eval("ItemNumber") %>' />
                      </ItemTemplate>
                  </telerik:GridTemplateColumn>
                  <telerik:GridTemplateColumn DataField="ItemName" HeaderText="Product" SortExpression="ItemName"
                      UniqueName="ItemName">
                      <ItemTemplate>
                          <asp:Label ID="ItemNameLabel" runat="server" SkinID="EditForms" Text='<%# Eval("ItemName") %>' />
                      </ItemTemplate>
                  </telerik:GridTemplateColumn>

              </Columns>
          </MasterTableView>
      </telerik:RadGrid>

Here is the linq to sql statement that is used to populate the grid:

protected void RadGridInventory_NeedDataSource(object source, GridNeedDataSourceEventArgs e)
       {
           TIPWebITLibrary.DAL.TIPWebITDataContext DC = new TIPWebITLibrary.DAL.TIPWebITDataContext();
           var RoomInventory = (from items in DC.tblTechItems
                                join inventory in DC.tblTechInventories on items.ItemUID equals inventory.ItemUID
                                where inventory.EntityTypeUID == 2 && inventory.EntityUID == Convert.ToInt32(HiddenFieldEntity.Value)
                                group items.ItemNumber by
                                new { items.ItemNumber, items.ItemName, inventory.EntityTypeUID, inventory.EntityUID } into g
                                select g);
           this.RadGridInventory.DataSource = RoomInventory.ToList();
       }

Any ideas on what I am doing wrong here?


Here is the result set when I run my linq statement in LinqPAD:

Key= { ItemNumber = 1251341, ItemName = C510 Webcam, EntityTypeUID = 2, EntityUID = 1 } ItemNumber 1251341 ItemName C510 Webcam EntityTypeUID 2 EntityUID 1   1251341

Key= { ItemNumber = 1251343, ItemName = MacBook, EntityTypeUID = 2, EntityUID = 1 } ItemNumber 1251343 ItemName MacBook EntityTypeUID 2 EntityUID 1   1251343 1251343

[Wired_Nerve]

I got it to work, but I am not happy with the way the code looks at all.. Does not seem "right..." if you know what I mean...

TIPWebITLibrary.DAL.TIPWebITDataContext DC = new TIPWebITLibrary.DAL.TIPWebITDataContext();

            var RoomInventory = (from items in DC.tblTechItems
                                 join inventory in DC.tblTechInventories on items.ItemUID equals inventory.ItemUID
                                 where inventory.EntityTypeUID == 2 && inventory.EntityUID == Convert.ToInt32(HiddenFieldEntity.Value)
                                 group items.ItemNumber by
                                 new { items.ItemNumber, items.ItemName, inventory.EntityTypeUID, inventory.EntityUID } into g

                                 select new { g.Key.ItemName, g.Key.ItemNumber, g.Key.EntityTypeUID, g.Key.EntityUID });

[Vasil]

Hi Warren,

At this moment, we could not think of a better solution than what you came with.
The first linqtosql you used, returns IQueryable<SomeDataClass>, and the DataBinder does not know how to handle it.

All the best,
Vasil
the Telerik team