前台

<ItemTemplate>

                        <tr>

                            <td>

                                <asp:LinkButton ID="LinkButton_cancel" OnClientClick="javascript:if(!confirm('确定取消吗?'))return false;" runat="server" CommandName="cancel" CommandArgument='<%#Eval("BidSNo") %>'>取消</asp:LinkButton>

                            </td>

                        </tr>

                    </ItemTemplate>

后台

 if (e.CommandName == "cancel")

        {

            string bidSNo = e.CommandArgument.ToString();

            string str = ((TextBox)e.Item.FindControl("Button_cancel")).Text;

            //逻辑

        }