loading data in datagrid when page_load occurs

if (!IsPostBack)
            {
                BindGrid();
            }
public void BindGrid()
        {
            Con = new SqlConnection("Your Connection Details");
            Con.Open();
            dt = new SqlDataAdapter("Select * from table", Con);
            DataSet ds = new DataSet();
            dt.Fill(ds);
            GridView1.DataSource = ds;
            GridView1.DataBind();
            Con.Close();
        }