ADO.NET复习总结（2）--连接池

时间：2017-12-22 12:23:31 阅读：254 评论：0 收藏：0 [点我收藏+]

标签：.text sql gen seconds 维护 top connect col style

1、

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2、

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3、示例：在一百次循环中，执行数据库连接的打开和关闭，使用stopwatch查看所用的时间。

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Diagnostics;
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Stopwatch watch = new Stopwatch();

            watch.Start();
            for (int i = 0; i < 100; i++)
            {
                SqlConnection conn = new SqlConnection("server=.;database=dbtest;uid=sa;pwd=123");
                conn.Open();
                conn.Close();
                conn.Dispose(); 
            }
            watch.Stop();
            label1.Text = watch.ElapsedMilliseconds.ToString();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Stopwatch watch = new Stopwatch();

            watch.Start();
            for (int i = 0; i < 100; i++)
            {
                SqlConnection conn = new SqlConnection("server=.;database=dbtest;uid=sa;pwd=123;Pooling=false");
                conn.Open();
                conn.Close();
                conn.Dispose();
            }
            watch.Stop();
            label2.Text = watch.ElapsedMilliseconds.ToString();

        }
    }
}