MysqlDbHelper

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//引用命名空间
using MySql.Data.MySqlClient;
using MySql.Data;
using System.Data;

namespace DAL
{
    public class MySqlDbHelper
    {
        //连接数据库
        //MySqlConnection conn = new MySqlConnection("");
        //public static string connection = "";
        static string connectionStrings = "Server=127.0.0.1;Database=周考三;Uid=root;Pwd=root;";



        /// <summary>
        ///         利用存储过程 返回受影响行数  添加  删除  修改
        /// </summary>
        /// <param name="parameter"></param>
        /// <param name="procName"></param>
        /// <returns></returns>
        public static int ProcProcExecuteNonQuery(CommandType commType,string procName, MySqlParameter[] parm=null)
        {
            using (MySqlConnection conn=new MySqlConnection(connectionStrings))
            {
                MySqlCommand cmd = new MySqlCommand(procName);
                cmd.Connection = conn;
                conn.Open();
                cmd.CommandType = commType;
                if (parm!=null )
                {
                    cmd.Parameters.AddRange(parm);
                }
                int i = cmd.ExecuteNonQuery();
                return i;
            }
            

        }

        /// <summary>
        ///         利用存储过程,返回一行一列
        /// </summary>
        /// <param name="procName"></param>
        /// <param name="parameter"></param>
        /// <returns></returns>
        public static object ProcExecuteScalar(CommandType commType, string procName, MySqlParameter[] parm = null)
        {
            using (MySqlConnection conn = new MySqlConnection(connectionStrings))
            {
                MySqlCommand cmd = new MySqlCommand(procName);
                cmd.Connection = conn;
                conn.Open();
                cmd.CommandType = commType;
                if (parm != null)
                {
                    cmd.Parameters.AddRange(parm);
                }
                object  obj = cmd.ExecuteScalar();
                return obj;
            }
        }

        /// <summary> 
        ///         利用存储过程,获取数据表  查询  显示
        /// </summary>
        /// <param name="procName"></param>
        /// <param name="parm"></param>
        /// <returns></returns>
        public static DataTable ProcDataAdapter(CommandType commType, string procName, MySqlParameter[] parm = null)
        {
            using (MySqlConnection conn = new MySqlConnection(connectionStrings))
            {
                DataTable dt = new DataTable("com");
                MySqlCommand cmd = new MySqlCommand(procName);
                cmd.Connection = conn;
                conn.Open();
                cmd.CommandType = commType;
                if (parm!=null)
                {
                    cmd.Parameters.AddRange(parm);
                }
                MySqlDataAdapter da = new MySqlDataAdapter(cmd);
                da.Fill(dt);
                return dt;
            }
        }
    }
}