使用Visual Studio 2010连接到SQL Server Express

Question

I'm new to .net and c# and want to connect Sql server express available in visual studio 2010.
I have searched a lot and read connection strings in connectionstrings.com but still don't know how to connect.
i added a "service-based database" with adding new item and now have a db.mdf with tables.

my code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;

namespace ConsoleApplication1
{

class First
{
    static void Main()
    {
        SqlConnection con = new SqlConnection("Data Source=(local);Initial Catalog=db2.mdf;Integrated Security=True");
            con.Open();


            Console.WriteLine("ok");
            Console.ReadLine();
    }
}
}

but it does not connect. in fact it executes with no errors , but no output for Console.WriteLine("ok");

how should be the connection-string in my case? specially for "Data source". I don't know what should its value be. please tell me the full connection-string which suits my case.

I'm really new to .net and confused many days for a simple connection.

also tried many other connection strings , but not working...

Answer 1

try with this code

using(var connection = new SqlConnection("Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\db2.mdf;Integrated Security=True;User Instance=True")
{



}