MySQL连接池

1.

 using System;
 using System.Collections;
 using MySql.Data.MySqlClient;

 namespace Helper
 {
     /// <summary>
     /// MySQL连接池
     /// </summary>
     public static class MySQLConnPool
     {
         //private static string connStr = "server=localhost;User ID=root;Password=qwer1234;database=test;";//连接字符串
         private static ArrayList poolLs = new ArrayList();//连接池
         private static int max = ;//连接池最大数量

         /// <summary>
         /// 获取连接对象
         /// </summary>
         /// <param name="connStr">数据库连接字符串</param>
         /// <returns></returns>
         public static MySqlConnection GetConn(string connStr)
         {
             lock (poolLs)
             {
                 MySqlConnection retConn = null;//超出线程池大小限制时返回null
                 if (poolLs.Count > )
                 {
                     retConn = (MySqlConnection)poolLs[];//获取池中第一个
                     poolLs.RemoveAt();//从池中移除
                 }
                 else
                 {
                     retConn = new MySqlConnection(connStr);//连接池中没有连接,创建一个
                     retConn.Open();
                 }
                 return retConn;
             }
         }

         /// <summary>
         /// 关闭连接或添加到连接池
         /// </summary>
         /// <param name="conn"></param>
         public static void Close(MySqlConnection conn)
         {
             lock (poolLs)
             {
                 if (poolLs.Count < max)//连接池只保留最大数量的连接
                 {
                     poolLs.Add(conn);//连接池数量小于限制,将连接添加到连接池
                 }
                 else
                 {
                     conn.Close();//线程池超出数量限制,关闭连接
                 }
             }
         }
     }
 }

连接池代码

2.

 using System;
 using System.Web.Mvc;
 using System.Data;
 using MySql.Data.MySqlClient;
 using Helper;

 namespace MVC4.Controllers
 {
     public class testController : Controller
     {
         private static string connStr = "server=localhost;User ID=root;Password=12345678;database=test;";
         public ActionResult Index()
         {
             MySqlConnection conn = MySQLConnPool.GetConn(connStr);
             MySqlCommand cmd = new MySqlCommand("Select * from us_BaseInfo", conn);
             MySqlDataReader dr = cmd.ExecuteReader();
             if (dr.Read())
             {
             }
             dr.Close();//关闭MySqlDataReader
             MySQLConnPool.Close(conn);
             return View();
         }
     }
 }

连接池使用