解决asp.net向mysql中插入数据的问题

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using MySql.Data.MySqlClient;
using System.Data;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            MyDataBind();
        }
    }
    public void MyDataBind()
    {
        const string MySQL_InsertUsers = "Insert into Users(UserName,Passwords,Sex,Address) values(?UserName,?Passwords,?Sex,?Address)";
        MySqlParameter[] parameters = {
     new MySqlParameter("?UserName", MySqlDbType.VarChar,50),
     new MySqlParameter("?Passwords", MySqlDbType.VarChar,50),
     new MySqlParameter("?Sex", MySqlDbType.Bit),
     new MySqlParameter("?Address", MySqlDbType.VarChar,300)};
        parameters[0].Value = "test";
        parameters[1].Value = "test";
        parameters[2].Value = true;
        parameters[3].Value = "test";

        MySqlHelper.ExecuteNonQuery(MySqlHelper.ConnectionStr, CommandType.Text, MySQL_InsertUsers, parameters);
    }
}