获取listview中InsertItemTemplate中textbox值

sk1078 2013-01-02 04:28:07

<asp:ListView ID="lv_Initial_results" runat="server" EnableModelValidation="True"

            InsertItemPosition="FirstItem" DataKeyNames="Id" 

            oniteminserting="lv_Initial_results_ItemInserting">

            <ItemTemplate>

                <tr style="">

                    <td>

                        <%# Eval("Achievements_name")%>

                    </td>

                    <td>

                        <%# Eval("Start_time")%>

                    </td>

                    <td>

                        <%# Eval("End_time")%>

                    </td>

                    <td>

                        <%# Eval("Achievement")%>

                    </td>

                    <td>

                        <%# Eval("Obligor")%>

                    </td>

                    <td>

                        <asp:LinkButton ID="lb_Edit" runat="server" Text="编辑" CommandName="Edit"></asp:LinkButton>

                        <asp:LinkButton ID="lb_Delete" runat="server" Text="删除" CommandName="Delete"></asp:LinkButton>

                    </td>

                </tr>

            </ItemTemplate>

            <InsertItemTemplate>

                <tr style="">

                    <td>

                        <asp:TextBox ID="txt_Achievements_name" runat="server"></asp:TextBox>

                    </td>

                    <td>

                        <asp:TextBox ID="txt_Start_time" runat="server"></asp:TextBox>

                    </td>

                    <td>

                        <asp:TextBox ID="txt_End_time" runat="server"></asp:TextBox>

                    </td>

                    <td>

                        <asp:TextBox ID="txt_Achievement" runat="server"></asp:TextBox>

                    </td>

                    <td>

                        <asp:TextBox ID="txt_Obligor" runat="server"></asp:TextBox>

                    </td>

                    <td>

                        <asp:LinkButton ID="lb_Insert" runat="server" Text="添加" CommandName="Insert"></asp:LinkButton>

                    </td>

                </tr>

            </InsertItemTemplate>                   

            <LayoutTemplate>

                <table id="Table2" runat="server">

                    <tr id="Tr1" runat="server">

                        <td id="Td1" runat="server">

                            <table id="itemPlaceholderContainer" runat="server" border="0" style="">

                                <tr id="Tr2" runat="server" style="">

                                    <th>

                                        成果名称

                                    </th>

                                    <th>

                                        开始时间

                                    </th>

                                    <th>

                                        结束时间

                                    </th>

                                    <th>

                                        成果形式

                                    </th>

                                    <th>

                                        承担人

                                    </th>

                                    <th>

                                        功能操作

                                    </th>

                                </tr>

                                <tr id="itemPlaceholder" runat="server">

                                </tr>

                            </table>

                        </td>

                    </tr>

                </table>

            </LayoutTemplate>

        </asp:ListView>

 //添加

    protected void lv_Initial_results_ItemInserting(object sender, ListViewInsertEventArgs e)

    {

        int Project_id = Convert.ToInt32(Session["Project_id"].ToString());

        string Achievements_name = ((TextBox)lv_Initial_results.InsertItem.FindControl("txt_Achievements_name")).Text;

        string Start_time = ((TextBox)lv_Initial_results.InsertItem.FindControl("txt_Start_time")).Text;

        string End_time = ((TextBox)lv_Initial_results.InsertItem.FindControl("txt_End_time")).Text;

        string Achievement = ((TextBox)lv_Initial_results.InsertItem.FindControl("txt_Achievement")).Text;

        string Obligor = ((TextBox)lv_Initial_results.InsertItem.FindControl("txt_Obligor")).Text;

    }

为什么获取的值为空？