I want to show data in access with datagridview

 string connection;
            connection = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=Rahsan.accdb;";
            OleDbConnection con = new OleDbConnection(connection);
            try
            {
                //GridView1.Columns.Add("ID", "ID");
                //GridView1.Columns.Add("name", "name"); 
                //GridView1.Columns.Add("surname", "surname");
                //GridView1.Columns.Add("telephone", "telephone");
                //GridView1.Columns.Add("email", "email");
                con.Open();
                string query = "select * from phone";
                OleDbCommand cmd = new OleDbCommand(query,con);
                cmd.CommandType = CommandType.Text;
                OleDbDataAdapter da = new OleDbDataAdapter(cmd);
                DataTable phone = new DataTable();
                da.Fill(phone);
                GridView1.DataSource = phone;
                }

1. I want to show data in access with datagridview
2. how can i do 
3. please help me