高分求助！一个奇怪的问题！！！！

Question

前台代码：<table width="100%">
        <tr>
            <td align="right" style="width: 80px">
                <asp:Label ID="lblTitle" runat="server" Text="标&nbsp;&nbsp;&nbsp;&nbsp;题："></asp:Label>
            </td>
            <td align="left" style="width: 400px">
                <asp:TextBox ID="txtTitle" runat="server" Width="400px"></asp:TextBox>
            </td>
        </tr>
        <tr>
            <td align="right" style="width: 80px" valign="top">
                <asp:Label ID="lblContent" runat="server" Text="内&nbsp;&nbsp;&nbsp;&nbsp;容："></asp:Label>
            </td>
            <td colspan="3">
                <FCKeditorV2:FCKeditor ID="fckContent" runat="server" DefaultLanguage="zh-cn" Height="240px"
                    Width="100%">
                </FCKeditorV2:FCKeditor>
            </td>
        </tr>
    </table>
    <table width="100%">
        <tr>
            <td align="right" style="width: 80px">
                <asp:Label ID="lblMainPageImg" runat="server" Text="首页图片：" Visible="false"></asp:Label>
            </td>
            <td>
                <asp:RadioButtonList ID="radMainPage" runat="server" RepeatDirection="Horizontal"
                    Style="float: left" OnSelectedIndexChanged="RadioButtonList1_SelectedIndexChanged"
                    AutoPostBack="true" Visible="false">
                    <asp:ListItem Text="是" Value="True"></asp:ListItem>
                    <asp:ListItem Text="否" Value="False" Selected="True"></asp:ListItem>
                </asp:RadioButtonList>
            </td>
        </tr>
        <tr>
            <td align="right" style="width: 80px">
                <asp:Label ID="lblImgUrl" runat="server" Text="图片路径：" Visible="false"></asp:Label>
            </td>
            <td>
                <asp:TextBox ID="txtImgUrl" runat="server" Width="320px" Visible="false"></asp:TextBox>
                
            </td>
        </tr>
    </table>后台代码： protected void RadioButtonList1_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (radMainPage.SelectedValue.ToString().Equals("True"))
            {
                lblImgUrl.Visible = true;
                txtImgUrl.Visible = true;
            }
            else
            {
                lblImgUrl.Visible = false;
                txtImgUrl.Visible = false;
            }
        }
如果把以上代码放到一个自定义用户控件中并在其他页面引用时，当设置是否首页显示图片时（RadioButtonList 改变时），FCKeditor 中的内容会丢失，如果只在一个页面中显示的话，RadioButtonList 改变时，FCKeditor 中的内容却不会丢失。奇怪了？？？？？？？？？。究竟哪里的问题呢？？？？？？

Answer 1

FCKeditor 一般放到iframe里好些
FCKeditor 存放内容在客户端控件里，如果页面回发，内容就会丢失

Answer 2

我在用户控件中加了UpdatePanel 也不行，在页面中用户控件外还有一个UpdatePanel。这个相当于嵌套在里面了。
 <asp:UpdatePanel runat="server" ID="up" UpdateMode="Conditional">
        <ContentTemplate>
            <table width="100%">
                <tr>
                    <td align="right" style="width: 80px">
                        <asp:Label ID="lblMainPageImg" runat="server" Text="首页图片：" Visible="false"></asp:Label>
                    </td>
                    <td>
                        <asp:RadioButtonList ID="radMainPage" runat="server" RepeatDirection="Horizontal"
                            Style="float: left" OnSelectedIndexChanged="RadioButtonList1_SelectedIndexChanged"
                            AutoPostBack="true" Visible="false">
                            <asp:ListItem Text="是" Value="True"></asp:ListItem>
                            <asp:ListItem Text="否" Value="False" Selected="True"></asp:ListItem>
                        </asp:RadioButtonList>
                    </td>
                </tr>
                <tr>
                    <td align="right" style="width: 80px">
                        <asp:Label ID="lblImgUrl" runat="server" Text="图片路径：" Visible="false"></asp:Label>
                    </td>
                    <td>
                        <asp:TextBox ID="txtImgUrl" runat="server" Width="320px" Visible="false"></asp:TextBox>
                        <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="txtImgUrl"
                            Display="Dynamic" ErrorMessage="图片路径不能为空！">图片路径不能为空！</asp:RequiredFieldValidator>
                    </td>
                </tr>
            </table>
        </ContentTemplate>
    </asp:UpdatePanel>

Answer 3

是不是UpdatePanel 用法不对？？？？

Answer 4

这说明你的外边的UpdatePanel过于托大了，它没有那么大能力（来管理本不该刷新的部分），不要把它搞那么大。

Answer 5

这次改版之后，csdn的“回复”部分的大bug实在太烂了。但是最烂的还是csdn的态度，竟然宁可烂也不恢复以前状态。

Answer 6

另外，我在4楼没有看到用户控件使用啊？奇怪。这是实际的程序吗？
如果无法刷新，就把UpdatePanel分得细一些。实际上这也会让程序显示快一点。在后台，你可以用代码来刷新一组你需要刷新的UpdataPanel。所以把UpdataPanel分细一些并不会影响什么。

Answer 7

    <script type="text/javascript">
    function show_Lb_img() {
        var Rbt = document.getElementById("tb_true");
        var Rbf = document.getElementById("tb_false");
        var lblImgUrl = document.getElementById("lblImgUrl");
        var txtImgUrl = document.getElementById("txtImgUrl");
        if (Rbt.checked) {
            lblImgUrl.style.display = "";
            txtImgUrl.style.display = "";
        }
        if (Rbf.checked) {
            lblImgUrl.style.display = "none";
            txtImgUrl.style.display = "none";
        }
        
    }
    </script>
   <table width="100%">
            <tr>
                <td align="right" style="width: 80px">
                    <asp:Label ID="lblMainPageImg" runat="server" Text="首页图片：" Visible="false"></asp:Label>
                </td>
                <td>
                    <input  type="radio" onclick="show_Lb_img()" id="tb_true" name="Rb_show" value="0" runat="server" />是
                    &nbsp;<input type="radio" onclick="show_Lb_img()" id="tb_false" name="Rb_show" value="1" runat="server" checked="true" />否
                </td>
            </tr>
            <tr>
                <td align="right" style="width: 80px">
                    <asp:Label style="display: none" ID="lblImgUrl" runat="server" Text="图片路径："></asp:Label>
                </td>
                <td>
                    <asp:TextBox style="display: none" ID="txtImgUrl" runat="server" Width="320px"></asp:TextBox>
                </td>
            </tr>
        </table>