<asp:GridView ID="griglia" runat="server" AutoGenerateColumns="false">
            <Columns>
                <asp:TemplateField>
                    <ItemTemplate>
                        <asp:CheckBox ID="chk" runat="server" Text='<%# Eval(Session["nomeColonna"].ToString()) %>'/>
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
        <asp:Button ID="Invio" runat="server" Text="Cliccami" onclick="Invio_Click" />