Unable to find the reference of a grid in treeview node

[Subramanyam]

My Design page
<telerik:RadTreeView ID="tvPropertyType" runat="server" Skin="Outlook" EnableDragAndDrop="True" OnClientNodeDropping="onNodeDropping" CheckBoxes="True" CheckChildNodes="True" TriStateCheckBoxes="True" EnableDragAndDropBetweenNodes="True" DataSourceID="ObjectDataSource1" DataTextField="DocumentType" DataValueField="DocumentTypeID">

    <Nodes>

    <telerik:RadTreeNode runat="server" Text="Root RadTreeNode1">

        <Nodes>

              <telerik:RadTreeNode runat="server" Text="Child RadTreeNode 1">

                  <NodeTemplate>

                    <telerik:RadGrid ID="rgForTree" runat="server">

                  </telerik:RadGrid>

              </NodeTemplate>

              </telerik:RadTreeNode>

              </Nodes>

        </telerik:RadTreeNode>

     </Nodes>

</telerik:RadTreeView>

My Code Behind

Protected Sub tvPropertyType_NodeDataBound(ByVal sender As Object, ByVal e As Telerik.Web.UI.RadTreeNodeEventArgs) Handles tvPropertyType.NodeDataBound

Dim rgForTree As RadGrid = DirectCast(e.Node.FindControl("rgForTree"), RadGrid)
        rgForTree.DataSource = Documents.GetPropertyDocumentsForUser(CInt(Me.lblPropertyID.Text), CurrentUser.UserID, e.Node.Value)
        rgForTree.DataBind()

    End Sub

I am not able to get the reference for the grid.
I have tried the code in "tvPropertyType_DataBound" as well.
I have tried the same code in a button click which is outside the tree.

Still not able to refer the grid in the treeview node

[Shinu]

Hello,

Here is the code that I tried for similar scenario. Please have a look at this and find out what you are missing.

ASPX:

<telerik:RadTreeView ID="tvPropertyType" runat="server" Skin="Outlook" EnableDragAndDrop="True"
    AppendDataBoundItems="true" CheckBoxes="True" CheckChildNodes="True" DataSourceID="SqlDataSource2"
    TriStateCheckBoxes="True" EnableDragAndDropBetweenNodes="True" DataTextField="Text"
    DataValueField="Value" DataFieldID="id" DataFieldParentID="ParentID" OnNodeDataBound="tvPropertyType_NodeDataBound">
    <NodeTemplate>
        <telerik:RadGrid ID="rgForTree" runat="server" AllowPaging="true">
        </telerik:RadGrid>
    </NodeTemplate>
</telerik:RadTreeView>
<asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
    SelectCommand="SELECT * FROM Tree"></asp:SqlDataSource>

C#:

protected void tvPropertyType_NodeDataBound(object sender, RadTreeNodeEventArgs e)
{
    RadGrid grid = (RadGrid)e.Node.FindControl("rgForTree");
    grid.DataSource = GetDataTable("Select * from Customers where Text ='"+e.Node.Text+"'");
    grid.DataBind();
}

-Shinu.

[Subramanyam]

Hi Shinu,
Thanks for the reply. I was able to get the Reference of the grid when i change the template i was able to get the reference of the grid. But the output is not what i wanted.
I wanted to show a grid in the child node.
I am able to see the child node in the grid when i use bind the grid using DataSource controls, but i dont get the reference of the grid when i change the template to show grid as a child node.

[Nikolay Tsenkov]

Hi Subramanyam,

Well you can do the following:
1. Create the template with RadGrid in the code-behind as a class implementing the ITemplate interface (here is an article on this topic: http://www.telerik.com/help/aspnet-ajax/tree_templatesruntime.html);
2. Handle the event TemplateNeeded (thrown for every node during binding);
3. in the handler of TemplateNeeded check if the node should be templated with grid or not and if yes, then instantiate the template and add it to the NodeTemplate property of the node.

This should do it!
Hope this is helpful for you!


Regards,
Nikolay Tsenkov
the Telerik team