using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

namespace FormControls

{

public partial class ControlsExample2 : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

if (IsPostBack)

{

//Retrieve the hidden field's value from the Request

String flag = Request["hdnFlag"];

//Alternatively

//String flag = Request.Form["hdnFlag"];

flag = flag.ToLower();

switch (flag)

{

case "uppercase":

lblDisplay.Text = txtInput.Text.ToUpper();

break;

case "lowercase":

lblDisplay.Text = txtInput.Text.ToLower();

break;

}

}

}

}

}