Gridview webhsop

Question

Hi there, I have a GridView and showed them in textboxes. I want to put it into a list and then show it again in a Gridview. How do you do this? It's for a webhsop...

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class Webshop : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
GridViewRow row = GridView1.SelectedRow;
txtArtikelnummer.Text = row.Cells[1].Text;
txtArtikelomschrijving.Text = row.Cells[2].Text;
txtPrijs.Text = row.Cells[3].Text;
txtKortingscode.Text = row.Cells[4].Text;
This is what I already have
}
protected void txtArtikelomschrijving_TextChanged(object sender, EventArgs e)
{
}
List<string> liArtikelOmschrijving = new List<string>();
protected void Button1_Click(object sender, EventArgs e)
{
liArtikelOmschrijving.Add(txtArtikelomschrijving.Text);
// Version 1: create a List of ints and add 4 ints t
}
protected void Button3_Click(object sender, EventArgs e)
{
GridView2.DataSource = liArtikelOmschrijving;
GridView2.DataBind();
}
}

<asp:TextBox ID="txtArtikelnummer" runat="server"></asp:TextBox>
<asp:TextBox ID="txtArtikelomschrijving" runat="server"></asp:TextBox>
<asp:TextBox ID="txtPrijs" runat="server" ></asp:TextBox>
<asp:TextBox ID="txtKortingscode" runat="server" ></asp:TextBox>
<asp:GridView ID="GridView1" CssClass="GridView" runat="server" AutoGenerateColumns="False" DataKeyNames="Artikelnummer" DataSourceID="AccessDataSource1" OnSelectedIndexChanged="GridView1_SelectedIndexChanged">
<Columns>
<asp:CommandField ShowSelectButton="True" />
<asp:BoundField DataField="Artikelnummer" HeaderText="Artikelnummer" InsertVisible="False" ReadOnly="True" SortExpression="Artikelnummer" />
<asp:BoundField DataField="Artikelomschrijving" HeaderText="Artikelomschrijving" SortExpression="Artikelomschrijving" />
<asp:BoundField DataField="Prijs" HeaderText="Prijs" SortExpression="Prijs" />
<asp:BoundField DataField="Kortingscode" HeaderText="Kortingscode" SortExpression="Kortingscode" />
</Columns>
</asp:GridView>
<asp:Button ID="Button2" runat="server" Text="Button" />
<asp:GridView ID="GridView2" runat="server">
</asp:GridView>
<asp:Button ID="Button3" runat="server" OnClick="Button3_Click" Text="Button" />
<asp:AccessDataSource ID="AccessDataSource1" runat="server" DataFile="~/GIP3.mdb" SelectCommand="SELECT * FROM [tblArtikel]"></asp:AccessDataSource>