ASP.NET

if (Session["User"] == null) Response.Redirect("Default4.aspx");
 filltrans(System.Convert.ToString(Session["User"]));
private void filltrans(string User)
    {
        try
        {
            SqlDataReader reader;
            string ConnectionString="...";            
            SqlConnection con = new SqlConnection(ConnectionString);
            con.Open();
            SqlCommand cmd = new SqlCommand("View", con);
           
            cmd.CommandType = CommandType.StoredProcedure;
            SqlParameter[] userdetail = new SqlParameter[1];
            userdetail[0] = new SqlParameter("@User_ID", SqlDbType.VarChar,50);
            userdetail[0].Value = User.ToString();
            
            reader = cmd.ExecuteReader();
            while(reader.Read())
            {
                txtuser.Text = System.Convert.ToString(reader["user"]);
                txtusername.Text = System.Convert.ToString(reader["user_new"]);
                txtmobileno.Text = reader["MobileNo"].ToString();
            }
            reader.Close();
        }
        catch (Exception ex)
        {
                  
        }
    }