Telerik is a leading vendor of ASP.NET AJAX, ASP.NET MVC, Silverlight, WinForms and WPF controls and components, as well as .NET Reporting, .NET ORM , .NET CMS, Code Analysis, Mocking, Team Productivity and Automated Testing Tools. Building on its expertise in interface development and Microsoft technologies, Telerik helps customers build applications with unparalleled richness, responsiveness and interactivity. Telerik products help thousands of companies to be more productive and deliver reliable applications under budget and on time.
Version Q2 2011 released 07/12/2011
select

ListBox / Drag-and-drop

      
  • Argentina
  • Australia
  • Brazil
  • Canada
  • Chile
  • China
  • Egypt
  • England
  • France
  • Germany
  • India
  • Indonesia
  • Kenya
  • Mexico
  • New Zealand
  • South Africa
  
  • USA

  • RadListBox fully supports reordering and transferring of Items through drag-and-drop.

    You could enable the functionality by first configuring the corresponding RadListBox(es) to allow Reorder and/or Transfer and then setting the EnableDragAndDrop property to true.

    In addition to all corresponding events that fire on Reorder/Transfer RadListBox supports a few solely drag-and-drop events.

    At the client, these are:

    • DragStart - fires when the drag-and-drop operation starts. Can be canceled.
    • Dragging - fires while an Item is being dragged. Can be canceled.
    • Dropping - fires before the dragged Item is dropped. Can be canceled.
    • Dropped - fires after the dragged Item is dropped.

    After a successful drop the corresponding Reorder and Transfer client-side events fire.

    At the server, the Reorder or Transfer events fire only if the AutoPostBackOnReorder or AutoPostBackOnTransfer properties are set to true.

    Finally, the server-side Dropped event fires only if the dragged Items are dropped onto an HTML element, which is not an Item and has its id attribute set.

Source Code

C# VB.NET
Show code in new window Demo isolation steps
  • <%@ Page AutoEventWireup="true" CodeFile="DefaultCS.aspx.cs" Inherits="Telerik.Web.Examples.ListBox.DragAndDrop.DefaultCS"
        Language="c#" %>

    <%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
    <%@ Register TagPrefix="qsf" TagName="Header" Src="~/Common/Header.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="HeadTag" Src="~/Common/HeadTag.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="Footer" Src="~/Common/Footer.ascx" %>
    <%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
    <!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">
        <qsf:HeadTag runat="server" ID="Headtag1" />
        <style type="text/css">
            #targetTextBox
            {
            }
            #targetTextBox textarea
            {
                border: 1px solid #979797;
                font: 12px/1.2em "segoe ui" ,arial,sans-serif;
                cursor: default;
            }
            .example-panel
            {
                background: transparent url(bg.jpg) no-repeat 0 0;
                position: relative;
                width: 748px;
                height: 383px;
            }
            #RadListBox1
            {
                position: absolute;
                top: 143px;
                left: 68px;
            }
            #RadListBox2
            {
                position: absolute;
                top: 143px;
                left: 304px;
            }
            #targetTextBox
            {
                left: 545px;
                position: absolute;
                top: 143px;
            }
        </style>
    </head>
    <body class="BODY">
        <form runat="server" id="mainForm" method="post">
        <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
        <qsf:Header runat="server" ID="Header1" NavigationLanguage="C#" />
        <telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server" CssClass="example-panel">
            <telerik:RadListBox ID="RadListBox1" runat="server" Width="200px" Height="200px"
                SelectionMode="Multiple" AllowTransfer="true" TransferToID="RadListBox2" AutoPostBackOnTransfer="true"
                AllowReorder="true" AutoPostBackOnReorder="true" EnableDragAndDrop="true" OnDropped="RadListBox_Dropped">
                <Items>
                    <telerik:RadListBoxItem Text="Argentina" />
                    <telerik:RadListBoxItem Text="Australia" />
                    <telerik:RadListBoxItem Text="Brazil" />
                    <telerik:RadListBoxItem Text="Canada" />
                    <telerik:RadListBoxItem Text="Chile" />
                    <telerik:RadListBoxItem Text="China" />
                    <telerik:RadListBoxItem Text="Egypt" />
                    <telerik:RadListBoxItem Text="England" />
                    <telerik:RadListBoxItem Text="France" />
                    <telerik:RadListBoxItem Text="Germany" />
                    <telerik:RadListBoxItem Text="India" />
                    <telerik:RadListBoxItem Text="Indonesia" />
                    <telerik:RadListBoxItem Text="Kenya" />
                    <telerik:RadListBoxItem Text="Mexico" />
                    <telerik:RadListBoxItem Text="New Zealand" />
                    <telerik:RadListBoxItem Text="South Africa" />
                </Items>
            </telerik:RadListBox>
            <telerik:RadListBox ID="RadListBox2" runat="server" Width="200px" Height="200px"
                SelectionMode="Multiple" AllowReorder="true" AutoPostBackOnReorder="true" EnableDragAndDrop="true"
                OnDropped="RadListBox_Dropped">
                <Items>
                    <telerik:RadListBoxItem Text="USA" />
                </Items>
            </telerik:RadListBox>
            <div id="targetTextBox">
                <asp:TextBox ID="TextBox1" runat="server" Wrap="true" Rows="3" TextMode="MultiLine"></asp:TextBox>
            </div>
        </telerik:RadAjaxPanel>
        <qsf:Footer runat="server" ID="Footer1" />
        </form>
    </body>
    </html>

Get more than expected!

 
 

Take your time to truly experience the power of RadControls for ASP.NET AJAX with a free 60-day trial backed up by Telerik’s unlimited dedicated support.

Download your RadControls for ASP.NET AJAX trial and jumpstart your development with the available Getting Started resources.

If you have any questions, do not hesitate to contact us at sales@telerik.com.

Copyright 2002-2024 © Telerik. All right reserved
Telerik Inc, 201 Jones Rd, Waltham, MA 02451