根据Repeater ASP.NET C#中的条件管理超链接 [英] Manage Hyperlink base on the condition in Repeater ASP.NET C#

问题描述

如何基于AttachmentID管理超链接，在内部链接"按钮中，有两个要管理的超链接，如果AttachmentID为"NA"，则应该看到一个超链接ID，否则应该看到两个超链接ID.我尝试了很多类似这样的代码无法找到谷歌.我尝试使用ItemCommand和ItemDataBound，但不了解此概念.这样做的主要概念是管理target ="_ blank".

How to manage Hyperlinks base on AttachmentID, In Inside link button there is two hyperlink to manage, If AttachmentID is "NA" Then Hyperlink ID one should visible else Hyperlink ID two should visible. I tried lots into google like this code not able to find. I tried using ItemCommand and ItemDataBound but did not understand this concept. The main concept to do this manage target="_blank".

下面是我的中继器代码.

Below is my Repeater Code.

<asp:Repeater ID="Repeater_News1" runat="server" OnItemDataBound="Repeater_News1_ItemDataBound">
        <ItemTemplate>
            <asp:Image ID="Image2" runat="server" class="pull-left img-responsive" ImageUrl='<%# Bind("ImageName", "~/images/news_images/{0}") %>' />
            <asp:LinkButton ID="lnkbtn_check" runat="server" CommandArgument='<%# DataBinder.Eval(Container.DataItem, "Attachmentid") %>'>

            <a href='<%# DataBinder.Eval(Container.DataItem, "Attachment")%>' id="one"
                 target="_blank">
                <%# DataBinder.Eval(Container, "DataItem.Heading")%></a> 

               <a href='<%# DataBinder.Eval(Container.DataItem, "Attachment")%>' id="two">

                <%# DataBinder.Eval(Container, "DataItem.Heading")%></a> 

            </asp:LinkButton>
            </h4>
            <p>
                <%# DataBinder.Eval(Container, "DataItem.SmallDescription")%></p>
        </ItemTemplate>
    </asp:Repeater>

推荐答案

在转发器中使用它:

<asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl='<%# Eval("Attachment") %>' Visible='<%# Eval("AttachmentID").ToString() != "NA" %>' Text='<%# Eval("DataItem.Heading") %>' Target="_blank" />

您可以在HyperLink本身中使用if语句设置可见性: Visible ='<％#Eval("AttachmentID").ToString()！="NA"％>'

You can set the Visibility with an if statement in the HyperLink itself: Visible='<%# Eval("AttachmentID").ToString() != "NA" %>'

更新

您还可以检查 IsNullOrEmpty 的 AttachmentID ，并显示正确的超链接.

You can also check the AttachmentID for IsNullOrEmpty and show the correct hyperlink.

<asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl='<%# Eval("Attachment") %>' Visible='<%# string.IsNullOrEmpty(Eval("AttachmentID").ToString()) %>' Text='<%# Eval("DataItem.Heading") %>' Target="_blank" />

<asp:HyperLink ID="HyperLink2" runat="server" NavigateUrl='<%# Eval("Attachment") %>' Visible='<%# !string.IsNullOrEmpty(Eval("AttachmentID").ToString()) %>' Text='<%# Eval("DataItem.Heading") %>' Target="_self" />

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