PlaceHolder control example

The PlaceHolder control is used to reserve space for controls added by code.The PlaceHolder control does not produce any visible output (it only acts as a container for other controls on the Web page).

property:-
runat:-runat Specifies that the control is a server control. Must be set to "server"

 .....................Designing code for PlaceHolder control........
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<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>





    Untitled Page
    


    
    
    
        
            
                
                    

                                             
                    
                    

                
                
                     
            
            
                
                    
                              
                    
              
                    

                                    
                    
                
                
                     
            
            
                
                     
                
                     
            
            
                
                
                
                     
            
        
    
    
    



.................................................................................................cs code................................
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using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        TextBox1.Text = "Created text box1";
        TextBox2.Text = "Created text box2";
        TextBox1.Columns = 15;
        TextBox1.ReadOnly = true;
        TextBox2.Columns = 20;
        Button1.Text = "Submit";
        PlaceHolder1.Controls.Add(TextBox1);
        PlaceHolder1.Controls.Add(TextBox2);
        PlaceHolder1.Controls.Add(Button1);
    }
}
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