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Keep the selected node open/selected/expanded

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TreeView

This is a migrated thread and some comments may be shown as answers.

Silver asked on 20 Feb 2012, 08:53 PM

Hi,

I am using telerik treeview (code sample below). I am trying to maintain the treeview state (wanted to keep the selected node open, selected) after response.redirect. But its not working, any one knows why?

This is the code I have in my ASP.net MASTER page.

Telerik.Web.UI.dll version: 2010.1.519.35

public void RadTreeView1_OnNodeClick(object sender, EventArgs e)

{

RadTreeNode node = RadTreeView1.FindNodeByText("Second Page");

node.Expanded = true;

node.Selected = true;

string pageN = string.Empty;

pageN = RadTreeView1.SelectedValue.ToString();

Response.Redirect(pageN.ToString());

}

<telerik:RadTreeView runat="server" ID="RadTreeView1" Style="margin: 15px;" EnableViewState="true" OnNodeClick="RadTreeView1_OnNodeClick" AutoPostback="true">

    <Nodes>

        <telerik:RadTreeNode Text="Top Item" Value="Top Item" SelectedCssClass="" EnableViewState="true">

            <Nodes>

                <telerik:RadTreeNode Expanded="False" Text="One" Value="One">

                    <Nodes>

                        <telerik:RadTreeNode Expanded="False" Text="OneItem1" Value="OneItem1">

                            <Nodes>

                                <telerik:RadTreeNode Expanded="False" Text="OneItem1Node1" Value="OneItem1Node1">

                                    <Nodes>

                                        <telerik:RadTreeNode Text="Actual Page" Value="~/ActualPage.aspx" Expanded="False" ></telerik:RadTreeNode>

                                    </Nodes>

                                </telerik:RadTreeNode>

                            </Nodes>

                        </telerik:RadTreeNode>

                        <telerik:RadTreeNode Expanded="False" Text="OneItem2" Value="OneItem2">

                            <Nodes>

                                <telerik:RadTreeNode Expanded="False" Text="OneItem2Node1" Value="OneItem2Node1">

                                    <Nodes>

                                        <telerik:RadTreeNode Text="Second Page" Value="~/SecondPage.aspx" Expanded="False" ></telerik:RadTreeNode>

                                        <telerik:RadTreeNode Text="Third Page" Value="~/ThirdPage.aspx" Expanded="False" ></telerik:RadTreeNode>

                                       </Nodes>

                                </telerik:RadTreeNode>

                                <telerik:RadTreeNode Expanded="False" Text="OneItem3" Value="OneItem3">

                                    <Nodes>

                                        <telerik:RadTreeNode Text="Fourth Page" Value="~/FourthPage.aspx" Expanded="False" ></telerik:RadTreeNode>

                                        <telerik:RadTreeNode Text="Fifth Page" Value="~/FifthPage.aspx" Expanded="False" ></telerik:RadTreeNode>

                                    </Nodes>

                                </telerik:RadTreeNode>

                            </Nodes>

                        </telerik:RadTreeNode>

                    </Nodes>

                </telerik:RadTreeNode>

            </Nodes>

        </telerik:RadTreeNode>

    </Nodes>

</telerik:RadTreeView>

7 Answers, 1 is accepted

Accepted