连接sql server的语句

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;

namespace linksql
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
string strcon, strsql;
strcon=@"Data Source=.;Initial Catalog=stumanage;Integrated Security=true";
// strcon = "Server=,;database=stumanage;trusted_connection=true";
strsql = "select * from student";
SqlConnection mycon = new SqlConnection(strcon);
SqlDataAdapter myda = new SqlDataAdapter(strsql, mycon);
DataSet myds = new DataSet();
myda.Fill(myds,"dbo.student");
dataGridView1 .DataSource=myds.Tables ["dbo.student"];

}

private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{

}
}
}