ADO.NET教程(三)

1、Connection对象
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;

namespace Connection
{
    class Program
    {
        static void Main(string[] args)
        {
            //构造连接字符串
            SqlConnectionStringBuilder connStr = new SqlConnectionStringBuilder();
            connStr.DataSource = @".SQLEXPRESS";
            connStr.InitialCatalog = "master";
            connStr.IntegratedSecurity = true;

            SqlConnection conn = new SqlConnection();//创建连接对象
            conn.ConnectionString = connStr.ConnectionString;//设置连接字符串

            conn.Open();//打开连接

            if(conn.State == ConnectionState.Open)
            {
                Console.WriteLine("Database is linked.");
                Console.WriteLine("
DataSource:{0}",conn.DataSource);
                Console.WriteLine("Database:{0}",conn.Database);
                Console.WriteLine("ConnectionTimeOut:{0}",conn.ConnectionTimeout);
            }

            conn.Close();//关闭连接
            conn.Dispose();//释放资源

            if(conn.State == ConnectionState.Closed)
            {
                Console.WriteLine("
Database is closed.");
            }

            Console.Read();
        }
    }
}