ขอโค้ด ASP.NET ด้วย c# ในการแสดง session ชื่อผู้ใช้งาน ที่ลงชื่อเข้าใช้มาในระบบ ให้แสดงได้ทุกหน้าที่

using System;
using System.Data;
using System.Configuration;
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;
using System.Data.SqlClient;
using System.Web.Configuration;
using System.Text;

public partial class UI_WebUserControl2 : System.Web.UI.UserControl
{
    string strConnString = WebConfigurationManager.ConnectionStrings["DB_regSystemConnection"].ConnectionString;
    SqlConnection aConnection = new SqlConnection();
    SqlCommand aCommand = new SqlCommand();
    string sqlStatement;

    protected void Page_Load(object sender, EventArgs e)
    {
        btnOut.Visible = false;
        lblName.Visible = false;
        lblUser.Visible = false;
    }
    public void MessageBox(string msg)
    {
        Label lbl = new Label();
        lbl.Text = "<script language='javascript'>" + Environment.NewLine + "window.alert('" + msg + "')</script>";
        Page.Controls.Add(lbl);
    }

    protected void  BtnOK_Click(object sender, ImageClickEventArgs e)
    {
        aConnection.ConnectionString = strConnString;
        aConnection.Open();


        int intNumRows = 0;
        sqlStatement = "SELECT COUNT(*) FROM Staff WHERE Staff_ID = '" + this.tbxNameLog.Text + "'AND password = '" + this.tbxPass.Text + "' ";
        aCommand = new SqlCommand(sqlStatement, aConnection);
        intNumRows = Convert.ToInt32(aCommand.ExecuteScalar());

        if (intNumRows > 0)
        {
            Session["strUser"] = this.tbxNameLog.Text;
            Response.Redirect("updateStaff.aspx");
            lblUsername.Visible = false;
            tbxNameLog.Visible = false;
            lblPassword.Visible = false;
            tbxPass.Visible = false;
           // lblUser.Text = Session["strUser"].ToString;
        }
        else
        {
            this.lblUsername.Visible = true;
            MessageBox("Username/Password ไม่ถูกต้อง");
            ClearDataControl();
            //this.lblUsername.Text = "Username/Password is wrong.";
        }

        aConnection.Close();
        aConnection = null;

        }

    private void ClearDataControl()
    {
        tbxNameLog.Text = "";
        tbxPass.Text = "";
    }
    protected void btnOut_Click(object sender, ImageClickEventArgs e)
    {
        Session.Clear();
        Response.Redirect("Default.aspx");

    }
}