Valeur d'une NumericUpDown pour un repeater

<asp:Repeater runat="server" ID="Repeater1">
  <ItemTemplate>
    <div id="Div1">
      <asp:Repeater runat="server" ID="Repeater2" DataSource="<%# Container.DataItem %>">
        <ItemTemplate>
          <span id="Span1">
            <%# Container.DataItem %>
          </span>
        </ItemTemplate>
      </asp:Repeater>
    </div>
  </ItemTemplate>
</asp:Repeater>

protected void fonction(object sender, EventArgs e)
    {
        try
        {
            List<List<String>> value1 = new List<List<String>>();
            List<String> value2 = new List<String>();
            for (int j = 0; j < int.Parse(NumericUpDown2.Text); j++)
                value2.Add("");
            for (int i = 0; i < int.Parse(NumericUpDown1.Text); i++)
                value1.Add(value2);
            Repeater1.DataSource = value1;
            Repeater1.DataBind();
        }
        catch (System.Exception ex)
        {
            System.Console.WriteLine(ex);
        }
    }