Contact_us.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace FoodFest
{
    public partial class Contact_us : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                if ((Session["LoggedInUserName"] != null))
                {
                    LinkButton LinkButton1 = (LinkButton)Master.FindControl("LinkButton1");
                    LinkButton1.Visible = false;
                    LinkButton LinkButton2 = (LinkButton)Master.FindControl("LinkButton2");
                    LinkButton2.Visible = true;


                    Label Welcome_label = (Label)Master.FindControl("Welcome_label");
                    Welcome_label.Text = "Welcome " + Session["LoggedInUserName"];
                    Welcome_label.Visible = true;

                    LinkButton LinkButton3 = (LinkButton)Master.FindControl("LinkButton3");
                    LinkButton3.Visible = true;

                }
                else
                {

                    LinkButton LinkButton1 = (LinkButton)Master.FindControl("LinkButton1");
                    LinkButton1.Visible = true;
                    LinkButton LinkButton2 = (LinkButton)Master.FindControl("LinkButton2");
                    LinkButton2.Visible = false;
                    LinkButton LinkButton3 = (LinkButton)Master.FindControl("LinkButton3");
                    LinkButton3.Visible = false;

                }
            }
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            TextBox1.Text = "";
            TextBox2.Text = "";
            TextBox3.Text = "";
            Label1.Text = "Thanks for the message";
        }
    }
}