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Home » AJAX » AJAX Resizable Extender Control

AJAX Resizable Extender Control

Through this article you will learn about AJAX Resizable Extender Control.

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ASP.NET AJAX offers you Resizable Extender Control. ResizableControl is an extender that attaches to any element on a web page and allows the user to resize that control with a handle that attaches to lower-right corner of the control. The resize handle lets the user resize the element as if it were a window.

<
ajaxToolkit:ResizableControlExtender ID="ResizableControlExtender1" runat="server" TargetControlID="Panel1"
/>

There are the following properties of  Resizable extender control:

  • TargetControlID
  • HandleCssClass
  • ResizableCssClass
  • MinimumWidth
  • MinimumHeight
  • MaximumWidth
  • MaximumHeight
  • OnClientResizeBegin
  • OnClientResizing
  • OnClientResize
  • HandleOffsetX
  • HandleOffsetY

Example:

<%
@ Page Language="C#" AutoEventWireup="true" CodeFile="ResizableControl.aspx.cs" Inherits="ResizableControl" %>
<%
@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<
html xmlns="http://www.w3.org/1999/xhtml">
<
head id="Head1" runat="server">
<
title>Resizable Control</title>
<
style type="text/css">
.handle
{
width:10px;
height:10px;
background-color:#aaccee;
}
.resizing
{
padding:0px;
border-style:solid;
border-width:1px;
border-color:#aaccee;
cursor:se-resize;
}
</style>
</
head
>
<
body>
<
form id="form1" runat="server">
    <
asp:ScriptManager runat="server" ID="scriptManager" />
        <
div>
            <
asp:Panel ID="Panel1" runat="server" Style="width: 300px; height: 200px;">
                <
asp:Label ID="image1" runat="server" Text="ASP.NET AJAX offers you Resizable Extender Control. ResizableControl is an extender that attaches to any element on a web page and allows the user to resize that control with a handle that attaches to lower-right corner of the control. The resize handle lets the user resize the element as if it were a window.">
                </
asp:Label>
        </
asp:Panel>
        <
ajaxToolkit:ResizableControlExtender ID="ResizableControlExtender1" runat="server" TargetControlID="Panel1" HandleCssClass="handle" ResizableCssClass="resizing" MaximumHeight="400" MaximumWidth="500" MinimumHeight="100" MinimumWidth="100" HandleOffsetX="5" HandleOffsetY="5" />
    </
div>
</
form>
</
body>
</
html
>

Output:
Now Press F5 to debug the application. You will get the following output:

Image1.JPG

If you want to resize the panel then put the mouse on right button corner and drag as you want.

 Image2.JPG

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 About the author
 
Purushottam Rathore

I am working as a Software Developer and has 4 years of experience on Microsoft Technology and having a Master Degree in Computer Application. I really like to work in the .NET platform. and working with ASP.NET 2.0/3.5, Web Services, WPF, WCF, Silverlight, AJAX, JavaScript, JQuery, Ado.net, MsAccess, SQL Server 2005/2008.

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thanks for sharing by danny On November 23, 2009
thanks man, I always wondered how to implement this :)

------------------------------------
Danny, San Jose Locksmith
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