Expanding detailtable not working

[Johan Olofsson]

I have a simple RadGrid with one DetailTable and when I click on the expanding arrow the whole RadGrid collapses (even the MasterTable) and all i see is a line, like the one you see when you have a RadGrid without datasource.

    <telerik:RadGrid
        ID="RadGrid1"
        runat="server"
        DataSourceID="ObjectDataSource1"
        AutoGenerateColumns="False"
        GridLines="None">
        <MasterTableView
            DataSourceID="ObjectDataSource1"
            DataKeyNames="Id">
            <Columns>
                <telerik:GridBoundColumn DataField="Id" HeaderText="#" UniqueName="ID">
                </telerik:GridBoundColumn>
                <telerik:GridBoundColumn DataField="ClientName" HeaderText="Client" UniqueName="ClientName">
                </telerik:GridBoundColumn>
                <telerik:GridBoundColumn DataField="ContactPerson" HeaderText="Contact" UniqueName="ContactPerson">
                </telerik:GridBoundColumn>
            </Columns>
            <DetailTables>
                <telerik:GridTableView
                    DataSourceID="ObjectDataSource2"
                    DataKeyNames="ClientId">
                    <ParentTableRelation>
                        <telerik:GridRelationFields DetailKeyField="ClientId" MasterKeyField="Id" />
                    </ParentTableRelation>
                    <Columns>
                        <telerik:GridBoundColumn DataField="Id" HeaderText="Id" UniqueName="Id"></telerik:GridBoundColumn>
                        <telerik:GridBoundColumn DataField="Text" HeaderText="Text" UniqueName="Text"></telerik:GridBoundColumn>
                    </Columns>
                </telerik:GridTableView>
            </DetailTables>
        </MasterTableView>
    </telerik:RadGrid>

[Pavlina]

Hello Johan, 

When you use different DataSourceID of every GridTableView, you need to set proper declarative relations.
For a live example that used declarative relations to generate a three-level hierarchy, see Three level hierarchy.

Please give it a try and let me know if you are still having issues implementing the functionality.

Best wishes,
Pavlina
the Telerik team

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[Lenny_shp]

I believe you also need ClientID as one of the column with display=off.

[Johan Olofsson]

Unfortunately none of the above solutions work.

I ahve taken the code from the demo suggested in one of the above answers and just replaced the datasource with and ObejctDataSource instead of SqlDataSource. Are there any demos that uses ObjectDataSource?

[Pavlina]

Hi Johan,

Attached to this message is a simple working application which handles the desired functionality. Please examine it and let me know if it works for you.

I hope this helps.

Best wishes,
Pavlina
the Telerik team

Instantly find answers to your questions on the new Telerik Support Portal.
Watch a video on how to optimize your support resource searches and check out more tips on the blogs.