/// <summary>
/// 数据库更新操作
/// </summary>
/// <param name="conn">数据库连接</param>
/// <param name="sql">更新语句</param>
/// <param name="parameters">参数列表化</param>
/// <returns>-101为更新失败</returns>
public int Update(string conn, string sql, params MySqlParameter[] parameters)
{
return(MySqlHelp.Update(conn, sql));
}