radGrid inside nestedviewTemplate problem

[duheng]

Hi,

I have two radGrids, one as the upper level one, one inside the nestedViewTemplate. When I expand the row of the upper level grid, the inner Grid will be shown up. The data shown in the inner table is dependent on some id.  I followed the Hierarchy with Templates demo on telerik.com. However, I got the following problem:
1. When I click one row, I got the right inner Grid. When I click another row, the first inner Grid will be updated with the seconde inner Grid information even though they should be different. When I click a third row, all three inner grid will have the third inner grid information.
2. When I collapse the third row, the two inner Grids of expanded rows will have the second row information. 

In all, the inner grid is always upated with the latest expanded row. I followed the demo, don't know why i have such strange problem. Can u help me out?

Here is the code: 

<Telerik:RadGrid Height ="612"  ID="Results"  HorizontalAlign="Center" runat="server" AllowPaging="True" AllowSorting="True"
                    Font-Names="Tahoma"  OnItemCommand="Results_OnItemCommand"  GridLines="None" Skin="Office2007"
                    OnPreRender="Results_PreRender" OnExcelExportCellFormatting="dgResults_ExcelExportCellFormatting" OnPageSizeChanged ="dgResults_pageSizeChanged">

                    <MasterTableView Width ="98.5%" TableLayout="auto" GroupLoadMode ="client" DataKeyNames ="General ID"  >
                    <Columns>
</Columns>
<NestedViewSettings DataSourceID="AccessDataSource1">
                    <ParentTableRelation>
                            <telerik:GridRelationFields DetailKeyField="GeneralID" MasterKeyField="General ID" />
                        </ParentTableRelation>
                   </NestedViewSettings>

                   <NestedViewTemplate>
                   <asp:Panel runat="server" ID="InnerContainer" CssClass ="viewWrap" Visible="false">
<telerik:radGrid HorizontalAlign ="center" ID ="dgResutls_inner"  runat ="server" OnNeedDataSource ="inner_needDataSource" AllowPaging="True" AllowSorting="True" Skin="Office2007" >
                     <AlternatingItemStyle  Font-Size="8pt" CssClass="MyAlternatingClass" wrap="False"/>
                    <ItemStyle Font-Names="Tahoma" Font-Size="8pt" CssClass ="MyClass"  wrap="False" />
                    <HeaderStyle Font-Bold="True" Font-Size="9pt" ForeColor="Black" Wrap="False" HorizontalAlign="Center" />
                    <ClientSettings >
                    <Selecting AllowRowSelect ="true" />

                    </ClientSettings>
                    <MasterTableView TableLayout ="auto" >
                    </MasterTableView>

                    </telerik:radGrid>



                   </asp:Panel>
                   </NestedViewTemplate>
 </MasterTableView>
</Telerik:RadGrid>

 <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="GetResults" UpdateMethod="GetResults" InsertMethod="GetResults" TypeName="iFindSearchDB"></asp:ObjectDataSource>
   <asp:AccessDataSource ID="AccessDataSource1" runat="server" DataFile="stage.mdb" SelectCommand="SELECT * FROM [stage] where GeneralID=@GeneralID">
      <SelectParameters>
                <asp:SessionParameter Name="GeneralID" SessionField="GeneralID" Type="Int32" />
            </SelectParameters>

    </asp:AccessDataSource>

 BTW, i will store the generalID in a session variable every time I click the row and use session parameter to databind the innerGrid.

[Chris]

I have the exact same problem and am searching for answers. It seems a RadGrid inside a NestedViewTemplate is not calling the NeedDataSource function on creation, but will call it after the next postback.

[Pavlina]

Hello,

In order to achieve your goal, I suggest that you bind both grids through the NeedDataSource event. For the outer grid there is nothing specific, you can do it as for a regular grid. And in the inner grid NeedDataSource event, you can get reference to the outer grid expanded item, e.g. the parent item. Thus you can get a data field value of the expanded item and use it for retrieving the inner grid data source.

However, I am sending you a simple working project which handles the desired functionality. Please
give it a try and let me know if it works as expected.

I hope this helps.

Greetings,
Pavlina
the Telerik team

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[duheng]

Hi Pavlina,

Thanks for your project.
I bind the inner grid through NeedDataSource and set the DataKeyNames as the dependency column in the out grid, rebind the inner grid in the itemCommand event (expandCollapse). It worked. 

Best regards,
Heng  

[Smiely]

Hi,

I have a repeater inside RadGrid and it's acting this way. How do I put needdatasource on repeater ?

Please help
Thanks
Smiely

[Pavlina]

Hello Smiely,

In order to properly assist you, it will be best if you can send us a simple running project (incl. CSS, images, skins, DB backup if needed and so on) demonstrating the problem (and step-by-step instructions on doing so). In that way we can reproduce and pinpoint the problems you're facing on our side, understand the logic of your application and provide a solution.

Kind regards,
Pavlina
the Telerik team