DropDownTree - Persisting DropDownTree Settings

  • Item 1
Isolate this demo as a stand-alone application
  • About this demo
  • C#
  • VB

In this example you can see how to preserve the Expanded Indices, Checked Indices and Selected Indices of the Embedded Tree of the DropDownTree control using the Telerik ASP.NET Persistence Framework.

  • DefaultCS.aspx
  • DefaultCS.aspx.cs
  • styles.css
<%@ Page Title="" Language="C#"  AutoEventWireup="true" CodeFile="DefaultCS.aspx.cs" Inherits="DefaultCS" %>

<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns='http://www.w3.org/1999/xhtml'>
<head runat="server">
    <title>Telerik ASP.NET Example</title>
    <link rel="stylesheet" type="text/css" href="styles.css" />
</head>

<body>
    <form id="form1" runat="server">
    <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
    <telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" />
    <telerik:RadPersistenceManager runat="server" ID="RadPersistenceManager1">
        <PersistenceSettings>
            <telerik:PersistenceSetting ControlID="RadDropDownTree1" />
        </PersistenceSettings>
    </telerik:RadPersistenceManager>
    <div class="demo-container">
        <div class="demo-settings">
            <telerik:RadButton RenderMode="Lightweight" ID="SaveButton" runat="server" Text="Save state" OnClick="SaveButton_Click" />
            <telerik:RadButton RenderMode="Lightweight" ID="ResetButton" runat="server" Text="Reset state" OnClick="ResetButton_Click" />
            <telerik:RadButton RenderMode="Lightweight" ID="LoadButton" runat="server" Text="Load state" OnClick="LoadButton_Click" />
        </div>
        <telerik:RadDropDownTree RenderMode="Lightweight" ID="RadDropDownTree1" runat="server" DefaultMessage="Please select" CheckBoxes="SingleCheck" Width="300px"
            DataFieldID="ID" DataFieldParentID="ParentID" TextMode="FullPath" ExpandNodeOnSingleClick="true"
            DataTextField="Text">
            <DropDownSettings Width="250px" />
        </telerik:RadDropDownTree>
    </div>
    </form>
</body>
</html>

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