ASP.NET

SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["Safa"].ConnectionString);    string branchid = "";    protected void Page_Load(object sender, EventArgs e)    {      branchid= Session["branchid"].ToString();        if (IsPostBack == false)        {      Image1.ImageUrl = "left1.ashx?BranchId=" + branchid;      Image2.ImageUrl = "left1old.ashx?BranchId=" + branchid;              } protected void Button1_Click(object sender, EventArgs e)    {// update code        SqlCommand cmdupdate = new SqlCommand("left1update", con);        cmdupdate.CommandType = CommandType.StoredProcedure;        con.Open();        cmdupdate.Parameters.AddWithValue("@BranchId", branchid);        if ( FileUpload1.HasFile)        {            FileInfo left1info = new FileInfo(  FileUpload1.PostedFile.FileName.Trim());            byte[] left1content = new byte[left1info.Length];            FileStream left1stream = left1info.OpenRead();            left1stream.Read(left1content, 0, left1content.Length);            left1stream.Close();           cmdupdate.Parameters.AddWithValue("@imgleft1",left1content); } cmdupdate.Parameters.AddWithValue("@notel1",txtnotes.Text);        if(cmdupdate.ExecuteNonQuery()!=0)        {        Functions.ShowAlertMessage("Updated.....");        txtnotes.Text = "";        System.Threading.Thread.Sleep(2000);        Image1.ImageUrl = "left1.ashx?BranchId=" + Session["branchid"].ToString();        Image2.ImageUrl = "left1old.ashx?BranchId=" + Session["branchid"].ToString();                }