UpdatePanel In Asp.net

Question

How To Use UpdatePanel In Asp.net?

Satyapriya Nayak · Answer

Hi Nitin The UpdatePanel control is probably the most important control in the ASP.NET AJAX package. It will AJAX'ify controls contained within it allowing partial rendering of the area. We already used it in the Hello world example and in this chapter we will go in depth with more aspects of the control. The tag has two childtags - the ContentTemplate and the Triggers tags. The ContentTemplate tag is required since it holds the content of the panel. The content can be anything that you would normally put on your page from literal text to web controls. The Triggers tag allows you to define certain triggers which will make the panel update it's content. The following example will show the use of both childtags. @ Page Language =  C#  AutoEventWireup =  true  CodeFile =  Default.aspx.cs  Inherits =  _Default  %> 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 > UpdatePanel title > head > body > form id =form1 runat =server > asp:ScriptManager ID =ScriptManager1 runat =server /> asp:UpdatePanel runat =server id =UpdatePanel updatemode =Conditional > Triggers > asp:AsyncPostBackTrigger controlid =UpdateButton2 eventname =Click /> Triggers > ContentTemplate > asp:Label runat =server id =DateTimeLabel1 /> asp:Button runat =server id =UpdateButton1 onclick =UpdateButton_Click text =Update /> ContentTemplate > asp:UpdatePanel > asp:UpdatePanel runat =server id =UpdatePanel1 updatemode =Conditional > ContentTemplate > asp:Label runat =server id =DateTimeLabel2 /> asp:Button runat =server id =UpdateButton2 onclick =UpdateButton_Click text =Update /> ContentTemplate > asp:UpdatePanel > form > body > html > Here is the CodeBehind. Just add the following method to the file: protected void UpdateButton_Click( object sender EventArgs e) { DateTimeLabel1.Text = DateTime.Now.ToString(); DateTimeLabel2.Text = DateTime.Now.ToString(); } Please refer the below links http://msdn.microsoft.com/en-us/library/bb399001.aspx http://ajax.net-tutorials.com/controls/updatepanel-control/ Thanks