iframe问题

Question

我用了menu和ifame，前台就是有方法让iframe高度自适应，希望后台menuclick时给iframe的src赋上值，而不是直接赋值，加载太慢。
<div class="tab">
            <asp:UpdatePanel ID="UpdatePanel2" runat="server">
            <ContentTemplate>
            <asp:Menu ID="Menu1" StaticMenuItemStyle-CssClass="smis" StaticMenuItemStyle-BorderStyle="Solid"
                StaticMenuItemStyle-BorderWidth="1" StaticMenuItemStyle-BorderColor="#9bb9f6"
                StaticMenuItemStyle-BackColor="#ffffff" StaticMenuItemStyle-Width="70px" StaticMenuItemStyle-Height="20px"
                StaticMenuItemStyle-HorizontalPadding="15px"                   StaticSelectedStyle-BorderStyle="Solid"
                StaticSelectedStyle-BorderWidth="1" StaticSelectedStyle-BorderColor="#ffffff"
                StaticSelectedStyle-BackColor="#ffffff" StaticSelectedStyle-Width="70px" StaticSelectedStyle-Height="30px"
                StaticSelectedStyle-HorizontalPadding="15px" 
               
                StaticSelectedStyle-CssClass="selectstyle" 
                DynamicSelectedStyle-CssClass="selectstyle"
                CssClass="tabli" runat="server"
                Orientation="Horizontal" OnMenuItemClick="Menu1_MenuItemClick">
                <Items>
                <asp:MenuItem Selected="True" Text="&nbsp;我的待办文件&nbsp;" Value="1" Selectable="true">
                    </asp:MenuItem>
                    <asp:MenuItem Selected="false" Text="&nbsp;我的已办文件&nbsp;" Value="2" Selectable="true">
                    </asp:MenuItem>
                    <asp:MenuItem Selected="false" Text="&nbsp;待办文件&nbsp;" Value="3" Selectable="true">
                    </asp:MenuItem>
                    <asp:MenuItem Selected="false" Text="&nbsp;已办文件&nbsp;" Value="4" Selectable="true">
                    </asp:MenuItem>
                    <asp:MenuItem Selected= "false"  Text="&nbsp;草稿箱&nbsp;" Value="5"  Selectable="true"></asp:MenuItem>
                    <asp:MenuItem Selected="false" Text="&nbsp;拟&nbsp;稿&nbsp;" Value="6" Selectable="true">
                    </asp:MenuItem>
                    <%--<asp:MenuItem Selected= "false" Text="已发公文" Value="3" Selectable="true"></asp:MenuItem>--%>
                </Items>
            </asp:Menu>
            </ContentTemplate>
            </asp:UpdatePanel>
        </div>
        <div class="tabbottom">
            <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                <ContentTemplate>
                    <asp:MultiView ID="MultiView1" runat="server" ActiveViewIndex="0">
                        <asp:View ID="View1" runat="server">
                            <iframe id="Iframe1" name="Iframe1" width="100%" frameborder="no"
                                onload="iFrameHeight('Iframe1')"   src="/Tasks/mefp/Workflows/MyTask/ListFile.aspx?IsMine=1"></iframe>
                        </asp:View>                        <asp:View ID="View2" runat="server">
                            <iframe id="Iframe2" name="Iframe2" width="100%" frameborder="no"
                               onload="iFrameHeight('Iframe2')"  src="/Tasks/mefp/Workflows/MyTaskHistory/ListFile.aspx?IsMine=1"></iframe>
                        </asp:View>                        <asp:View ID="View3" runat="server">
                            <iframe id="Iframe3" name="Iframe3" width="100%" frameborder="no"
                               onload="iFrameHeight('Iframe3')" src="/Tasks/mefp/Workflows/MyTask/ListFile.aspx?IsMine=0"></iframe>
                        </asp:View>                        <asp:View ID="View4" runat="server">
                            <iframe id="Iframe4" name="Iframe4" width="100%" frameborder="no"
                               onload="iFrameHeight('Iframe4')" src="/Tasks/mefp/Workflows/MyTaskHistory/ListFile.aspx?IsMine=0"></iframe>
                        </asp:View>
                        <asp:View ID="View5" runat="server">
                            <iframe id="Iframe5" name="Iframe5" width="100%" frameborder="no"
                              onload="iFrameHeight('Iframe5')"  src="/workflows/mefp/workflows/MyDrafts/List.aspx"></iframe>
                        </asp:View>
                        <asp:View ID="View6" runat="server">
                            <iframe id="Iframe6" width="100%" style="overflow: hidden;" frameborder="no"
                                onload="iFrameHeight('Iframe6')" src="<%=strNewUrl %>"></iframe>
                        </asp:View>
                                             
                        <%--<asp:View ID="View3" runat="server">
                            <iframe id="Iframe7" width="100%" height="940px" style="overflow: hidden;" frameborder="no"
                                runat="server" src="/workflows/mefp/workflows/StartCenter/List_newFile.aspx?WFTemplateId=4526efef-2a8d-4055-afcd-dc9e063de25e">
                            </iframe>
                        </asp:View>--%>
                    </asp:MultiView>
                </ContentTemplate>
                <Triggers>
                    <asp:AsyncPostBackTrigger ControlID="Menu1" EventName="MenuItemClick" />
                </Triggers>
            </asp:UpdatePanel>
        </div><script type="text/javascript" language="javascript">
    function iFrameHeight(id) {
        var ifm = document.getElementById(id);
        var subWeb = document.frames ? document.frames[id].document : ifm.contentDocument;
        if (ifm != null && subWeb != null) {
            ifm.height = subWeb.body.scrollHeight;
        }
    }  
</script>protected void Menu1_MenuItemClick(object sender, MenuEventArgs e)
        {
            MenuItem item = e.Item;
            switch (Menu1.SelectedValue)
            {
                case "1"://这个值是在Menu中加入Item时设定的
                    {
                        MultiView1.ActiveViewIndex = 0;
                        if (item.Text == "我的待办文件")
                            item.Selected = true;
                        break;
                    }
                case "2":
                    {
                        MultiView1.ActiveViewIndex = 1;
                        if (item.Text == "我的已办文件")
                            item.Selected = true;
                        break;
                    }
                case "3":
                    {
                        MultiView1.ActiveViewIndex = 2;
                        if (item.Text == "待办文件")
                            item.Selected = true;
                        break;
                    }
                case "4":
                    {
                        MultiView1.ActiveViewIndex = 3;
                        if (item.Text == "已办文件")
                            item.Selected = true;
                        break;
                    }
                case "5":
                    {
                        MultiView1.ActiveViewIndex = 4;
                        if (item.Text == "草稿箱")
                            item.Selected = true;
                        break;
                    }
                case "6":
                    {
                        MultiView1.ActiveViewIndex = 5;
                        if (item.Text == "拟稿")
                            item.Selected = true;
                        break;
                    }
                default:
                    break;
            }
        }

Answer 1

自己解决了，
<iframe id="Iframe1" name="Iframe1" width="100%" frameborder="0" runat="server"
                                src=""></iframe>
后台：
 Iframe1.Attributes.Add("src", "/Tasks/mefp/Workflows/MyTask/ListFile.aspx?IsMine=1");
                Iframe1.Attributes.Add("onload", "javascript:iFrameHeight('Iframe1');");