How to create dynamic gridview in asp.net c#?

 protected void Page_Load(object sender, EventArgs e)

    {



        GridView1.DataSource = GetResults();

        GridView1.DataBind();



    }

    private DataTable GetResults()

    {

        DataTable dt = new DataTable();

        dt.Columns.Add("Id", typeof(string));

        dt.Columns.Add("FirstName", typeof(string));

        dt.Columns.Add("LastName", typeof(string));

        dt.Columns.Add("Age", typeof(int));



        dt.Rows.Add("1", "S", "B", "2");

        return dt;

    }

 

           <asp:Panel ID="PanelGridView" runat="server">

            </asp:Panel>

        SqlDataAdapter da = new SqlDataAdapter(sqlQueryString, YourConnection);

        DataSet ds = new DataSet();

        da.Fill(ds);        

        GridView GridView1 = new GridView();

        GridView1.DataSource = ds.Tables[0];

        GridView1.DataBind();

        PanelGridView.Controls.Add(GridView1);

........

........

protected void bind_GV()
{
    DataTable dt=new DataTable();
    dt.Columns.Add("col1");
    dt.Columns.Add("col2");

    DataRow dr=dt.NewRow();
    dr[0]="1";
    dr[1]="adasd";

    dt.Rows.Add(dr);
    GV.DataSource=dt;
    GV.DataBind();
}