Unable to cast object of type 'System.Web.UI.CompiledTemplateBuilder' to type 'Telerik.Web.UI.RadGrid'.

[Ron]

I am trying to set the datasource inside the RadGrid which is embedded inside the itemtemplate of RadTreeNode

<telerik:RadTreeView ID="RadTreeView1" runat="server">
            <Nodes>
                <telerik:RadTreeNode runat="server" Text="Root RadTreeNode1">
                    <Nodes>
                        <telerik:RadTreeNode runat="server" Text="Child RadTreeNode 1">
                            <NodeTemplate>
                                    <telerik:RadGrid ID="AllocGrid" Width="98%" AllowSorting="False"
                                        AllowPaging="False" GridLines="None" AutoGenerateColumns="False" runat="server"
                                        Skin="Windows7" Height="147px" Style="margin-top: 102px">
                                        <MasterTableView Width="100%" Summary="RadGrid table" EditMode="InPlace">
                                            <Columns>
                                                <telerik:GridBoundColumn DataField="Type" HeaderText="Allocation Type"
                                                    ItemStyle-Width="100px" HeaderStyle-Width="100px" />
                                                <telerik:GridTemplateColumn DataField="Status" HeaderText="Status" ItemStyle-Width="300px"
                                                    HeaderStyle-Width="300px">
                                                    <ItemTemplate>
                                                        <%# GetStatus((String)Eval("Stats"))%>
                                                    </ItemTemplate>
                                                </telerik:GridTemplateColumn>
                                                <telerik:GridTemplateColumn DataField="Link" HeaderText="View">
                                                    <ItemTemplate>
                                                        <%# GetTheoreticalAllocationsLink() %>
                                                    </ItemTemplate>
                                                </telerik:GridTemplateColumn>
                                            </Columns>
                                        </MasterTableView>
                                    </telerik:RadGrid>
                            </NodeTemplate>
                        </telerik:RadTreeNode>
                    </Nodes>
                </telerik:RadTreeNode>
            </Nodes>
        </telerik:RadTreeView>

I am trying to set the data source in the code as below

((Telerik.Web.UI.RadGrid) RadTreeView1.Nodes[0].Nodes[0].NodeTemplate).DataSource = dataSource;

Seems it is invalid. and i get the following error. Unable to cast object of type 'System.Web.UI.CompiledTemplateBuilder' to type 'Telerik.Web.UI.RadGrid'.

I am not sure what am i doing wrong and also pretty new to asp.net with rad controls

[Bozhidar]

Hi Ron,

To get the RadGrid inside the node template, you have to use the FindControl method and the ID of the control you are trying to find. In your case the statement should look like this:

((Telerik.Web.UI.RadGrid) RadTreeView1.Nodes[0].Nodes[0].FindControl("AllocGrid")).DataSource = dataSource;

Best wishes,
Bozhidar
the Telerik team