C# 调用存储过程 返回int

  private void button1_Click(object sender, EventArgs e)
        {
            string username = txt_username.Text.Trim();
            string sex = cob_sex.Text.Trim();
            string createtime = dt_time.Value.Date.ToShortDateString();
            string tel = txt_tel.Text.Trim();
            if (checkTextbox() == true)
            {
                try
                {
                    myConn = new SqlHelper().conn;
                    SqlCommand cmd = new SqlCommand("SP_insertuser", myConn);
                    cmd.CommandType = CommandType.StoredProcedure;
                    cmd.Parameters.Add("@username", SqlDbType.VarChar).Value = username;
                    cmd.Parameters.Add("@sex", SqlDbType.Char).Value = sex;
                    cmd.Parameters.Add("@createtime", SqlDbType.Char).Value = createtime;
                    cmd.Parameters.Add("@tel", SqlDbType.VarChar).Value = tel;
                    myConn.Open();
                    int res = (int)cmd.ExecuteNonQuery();
                    myConn.Close();

                    if (res == 1)
                    {
                        MessageBox.Show("新增用户成功!", "", MessageBoxButtons.OK, MessageBoxIcon.Information);
                        BangDing();
                        txt_username.Text = string.Empty;
                        txt_tel.Text = string.Empty;
                    }
                    else
                    {
                        MessageBox.Show("新增用户失败!", "", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show("错误提示:"+ex.Message);
                    return;
                }
                finally
                {
                    if (myConn.State.ToString().ToLower() == "open")
                    {
                        myConn.Close();
                    }
                }
            }
            else
            {
                MessageBox.Show("信息非法,请检查信息,修改后再次提交!","出错啦!",MessageBoxButtons.OK,MessageBoxIcon.Error);
                return;
            }


        }