updatepanel in webpart

  
    

   
     
   
      
   
     protected
   
      
   
     override
   
      
   
     void
   
      CreateChildControls()
 {
 
   
     base
   
     .CreateChildControls();
 LinkButton goButton;
 goButton 
   
     =
   
      
   
     new
   
      LinkButton();
 goButton.ID 
   
     =
   
      
   
     "
   
     butGo
   
     "
   
     ;
 goButton.Text 
   
     =
   
      
   
     "
   
     Go
   
     "
   
     ;
 goButton.Command 
   
     +=
   
      
   
     new
   
      CommandEventHandler(goButton_Command);
 goButton.Click 
   
     +=
   
      
   
     new
   
      EventHandler(goButton_Click);
 goButton.CausesValidation 
   
     =
   
      
   
     false
   
     ;
 Controls.Add(goButton);
 UpdatePanel updatePanel;
 updatePanel 
   
     =
   
      
   
     new
   
      UpdatePanel();

 updatePanel.ID 
   
     =
   
      
   
     "
   
     upUpdatePanel
   
     "
   
     ;
 updatePanel.UpdateMode 
   
     =
   
      UpdatePanelUpdateMode.Conditional;
 updatePanel.ChildrenAsTriggers 
   
     =
   
      
   
     false
   
     ;
 AsyncPostBackTrigger t 
   
     =
   
      
   
     new
   
      AsyncPostBackTrigger();
 t.EventName 
   
     =
   
      
   
     "
   
     Command
   
     "
   
     ;
 t.ControlID 
   
     =
   
      goButton.ID;
 updatePanel.Triggers.Add(t);
 Label lb 
   
     =
   
      
   
     new
   
      Label();
 lb.ID 
   
     =
   
      
   
     "
   
     DT
   
     "
   
     ;
 lb.Text 
   
     =
   
      
   
     "
   
     Time
   
     "
   
     ;
 updatePanel.ContentTemplateContainer.Controls.Add(lb);
 Controls.Add(updatePanel);

 }
 
   
     private
   
      
   
     void
   
      goButton_Command(
   
     object
   
      sender, CommandEventArgs e)
 {
 Control ctl 
   
     =
   
      sender 
   
     as
   
      Control;
 UpdatePanel up 
   
     =
   
      ctl.NamingContainer.FindControl(
   
     "
   
     upUpdatePanel
   
     "
   
     ) 
   
     as
   
      UpdatePanel;
 Label lbl 
   
     =
   
      up.ContentTemplateContainer.FindControl(
   
     "
   
     DT
   
     "
   
     ) 
   
     as
   
      Label;
 lbl.Text 
   
     =
   
      DateTime.Now.ToString();

 }