public bool Update(pdetails u)
        {
            bool          isSuccess = false;
            SqlConnection conn      = new SqlConnection(myconnstrng);

            try
            {
                string     sql = "UPDATE pm SET password=@password where sno =@sno";
                SqlCommand cmd = new SqlCommand(sql, conn);
                cmd.Parameters.AddWithValue("@password", u.password);
                cmd.Parameters.AddWithValue("@sno", u.sno);
                conn.Open();

                int rows = cmd.ExecuteNonQuery();
                if (rows > 0)
                {
                    //Query Successfull
                    isSuccess = true;
                }
                else
                {
                    //Query Failed
                    isSuccess = false;
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                conn.Close();
            }
            return(isSuccess);
        }
        public bool Insert(pdetails u)
        {
            bool          isSuccess = false;
            SqlConnection conn      = new SqlConnection(myconnstrng);

            try
            {
                String     sql = "INSERT INTO pm(title,username,password) values(@title,@username,@password)";
                SqlCommand cmd = new SqlCommand(sql, conn);

                cmd.Parameters.AddWithValue("@username", u.username);
                cmd.Parameters.AddWithValue("@title", u.title);
                cmd.Parameters.AddWithValue("@password", u.password);

                conn.Open();

                int rows = cmd.ExecuteNonQuery();

                if (rows > 0)
                {
                    isSuccess = true;
                }
                else
                {
                    isSuccess = false;
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                conn.Close();
            }
            return(isSuccess);
        }