連接超出作用域后不會(huì)自動(dòng)關(guān)閉也不能由垃圾回收機(jī)制來(lái)釋放必須手動(dòng)關(guān)閉或釋放該資源

5、連接sqlserver 實(shí)例

（1）使用windows認(rèn)證

using System;

using System.Collections.Generic;

using System.Text;

using System.Data.SqlClient;

namespace sqlconnection1

{

class Program

{

static void Main(string[] args)

{

string source = "Data Source=duanyf//SQLEXPRESS;" + "Initial Catalog=master;"+"Integrated Security=True";

SqlConnection con = new SqlConnection(source);

try

{

con.Open();

Console.WriteLine("connection is successful!");

}

catch (Exception e)

{

Console.WriteLine("connection error is :{0}", e.ToString());

}

Console.ReadLine();

con.Close();

}

}

}

（2）使用sqlserver認(rèn)證

using System;

using System.Collections.Generic;

using System.Text;

using System.Data.SqlClient;

namespace sqlconnection1

{

class Program

{

private void SQLConnectionF(string source)

{

SqlConnection con = new SqlConnection(source);

try

{

con.Open();

Console.WriteLine("connection is successful!");

}

catch (Exception e)

{

Console.WriteLine("connection error is :{0}", e.ToString());

}

}

static void Main(string[] args)

{

string sou = "server=duanyf//SQLEXPRESS;" + "Initial Catalog=master;" + "UID = sa;"+"Password = aaa";

Program sqlcon = new Program();

sqlcon.SQLConnectionF( sou);

Console.ReadLine();

//con.Close();

}

}

}

我是把代碼復(fù)制過(guò)來(lái)的，在live writer中有點(diǎn)亂 也沒(méi)法排，復(fù)制到visualstudio中就好了。

轉(zhuǎn)載于:https://www.cnblogs.com/dyufei/archive/2009/12/11/2573965.html

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