Question

<asp:Repeater ID="rptHotels" runat="server" OnItemDataBound="rptHotels_ItemDataBound">
                    <ItemTemplate>
                        <div class="hotel-box">
                            <div class="hotel-img">
                                <asp:HiddenField ID="hdnHotelCode" runat="server" Value='<%#Eval("HotelCode")%>' />
                                <a class="preview" href='<%#Eval("ImageURL_Text") %>' title='<%#Eval("HotelName")%>' target="_blank">
                                    <img src='<%#Eval("ImageURL_Text") %>' alt='<%#Eval("HotelName")%>' height="75px"
                                        width="100px" />
                                </a>
                            </div>
                            <div class="hotel_heeading_content">
                                <div class="hotel_heading">
                                    <h2>
                                        <asp:LinkButton ID="lnkHotelDetail" runat="server" OnClick="lnkHotelDetail_Click">                                      
                                            <%#Eval("HotelName")%>
                                            (
                                            <%#Eval("boardType")%>)
                                        </asp:LinkButton>
                                    </h2>
                                </div>
                                <div class="stars">
                                    <span class="stars">
                                        <%#Eval("StarRating")%></span>
                                </div>
                                <div class="hotel_text">
                                    <%#Eval("HotelAddress")%>,
                                    <%#Eval("Destination")%>
                                    ,<%#Eval("Country")%>
                                    <img src="images/ico_point2.png" alt="" id="mapicon" class="mapicon" />
                                    <input type="hidden" id="hdnLatitude" class="hdnLatitude" runat="server" value='<%#Eval("Latitude")%>' />
                                    <input type="hidden" id="hdnLongitude" class="hdnLongitude" runat="server" value='<%#Eval("Longitude")%>' />
                                    <input type="hidden" id="hdnInfoWindow" class="hdnInfoWindow" runat="server" />
                                </div>
                            </div>
                            <p>
                                <asp:Literal ID="ltDes" runat="server"></asp:Literal>
                            </p>
                            <p>
                                <a href="#">more info</a>
                            </p>
                            <div class="btn">

                                <asp:LinkButton ID="lnkPrice" runat="server"  Text=' <%#Eval("totalPrice")%>'  OnClick="lnkHotelDetail_Click" ></asp:LinkButton>


                            </div>
                            <div class="roominfo">
                                <asp:Repeater ID="rptRooms" runat="server">
                                    <HeaderTemplate>
                                        <div class="rooms">
                                            <div class="roominfoheader">
                                                <div class="roomheaderlbl">
                                                    Room Name</div>
                                                <div class="roomheaderlbl">
                                                    Total Room Rate</div>
                                                <div class="roomheaderlbl">
                                                    Book Now</div>
                                            </div>
                                        </div>
                                    </HeaderTemplate>
                                    <ItemTemplate>
                                        <div class="rooms">
                                            <div class="roominforow">
                                                <div class="roominforowlbl">
                                                    <asp:Label ID="lblRoomName" runat="server" Text='<%#Eval("roomCategory") %>'></asp:Label></div>
                                                <div class="roominforowlbl">
                                                    $
                                                    <asp:Label ID="Label1" runat="server" Text='<%#Eval("totalRoomRate") %>'></asp:Label></div>
                                                <div class="roominforowlbl">
                                                   <asp:LinkButton ID="lnkBookNow" runat="server"  Text="Book Now" OnClick="lnkBookNow_Click"></asp:LinkButton></div>
                                            </div>
                                        </div>
                                    </ItemTemplate>
                                </asp:Repeater>
                            </div>
                        </div>
                    </ItemTemplate>
                </asp:Repeater>

我有嵌套转发器的HTML。我可以通过以下方法找到包含酒店代码的隐藏字段值

protected void lnkHotelDetail_Click(object sender, EventArgs e)
    {
        LinkButton btn = (LinkButton)sender;
        var item = (RepeaterItem)btn.NamingContainer;
        HiddenField hdnHotelCode = (HiddenField)item.FindControl("hdnHotelCode");



    }

但问题是现在我必须在单击嵌套的转发器项模板链接按钮时找到隐藏的字段值。您可以检查lnkBookNow是rptRooms转发器内的链接按钮。

protected void lnkBookNow_Click(object sender, EventArgs e)
    {
        LinkButton btn = (LinkButton)sender;
        var item = (RepeaterItem)btn.NamingContainer;
        HiddenField hdnHotelCode = (HiddenField)item.FindControl("hdnHotelCode");


    }

我试过这样的事情，但没找到隐藏的领域。

Answer 1

这里的问题是lnkBookNow.NamingContainer是rptRooms。此控件显然不包含hdnHotelCode。

我认为你应该能够这样做：

protected void lnkBookNow_Click(object sender, EventArgs e)
{
    LinkButton btn = (LinkButton)sender;
    var item = (RepeaterItem)btn.NamingContainer.NamingContainer.NamingContainer;
    HiddenField hdnHotelCode = item.FindControl("hdnHotelCode") as HiddenField;
}

btn.NamingContainer是RepeaterItem中的rptRooms。 NamingContainer本身就是Repeater。最后，NamingContainer的{{1}}是rptRooms的{{1}}，您要在其中找到RepeaterItem。

请注意我使用rptHotels关键字而不是显式强制转换 - 如果HiddenField返回null，这将保护您免受NullReferenceExceptions的影响。当然，在尝试访问它之前，应该明确检查as是否为空。

链接按钮位于嵌套转发器内时查找隐藏字段值

1 个答案: