C#中读取sql server的数据，并在datagridview中显示

private void button1_Click(object sender, EventArgs e)

{

DataSet ds = new DataSet();

using (SqlConnection conn = new SqlConnection())

{

conn.ConnectionString = "server=localhost;uid=sa;pwd=123456;database=table1";

conn.Open();

using (SqlCommand command = conn.CreateCommand())

{

command.CommandText = "select * from gongneng";

SqlDataAdapter da = new SqlDataAdapter(command);

try

{

da.Fill(ds);

}

catch

{ }

}

}

DataTable dt=new DataTable ();

dt = ds.Tables[0].Copy();

this.dataGridView1.DataSource = dt; //绑定到datagridview中显示

}