如何在datalist中创建动态超链接 [英] How to create a dynamic hyperlink in datalist

问题描述

我正在使用数据列表显示存储在SQL Server数据库中的新闻报道摘要。

 < asp： DataList ID =DL_NewsSummaryrunat =serverDataKeyField =newsItemId
 DataSourceID =DS_NewsSummary> 
< ItemTemplate> 
< h3> 
< asp：HyperLink ID =headlineLinkrunat =serverText ='<％＃Eval（headline）％>'NavigateUrl =＃/> 
< / h3> 
< asp：Label ID =dateLabelrunat =serverText ='<％＃Eval（date）％>'/> 
< br /> 
< asp：Label ID =introLabelrunat =serverText ='<％＃Eval（intro）％>'/> 
< hr /> 
< / ItemTemplate> 
< / asp：DataList> 
  

当用户点击标题超链接时，他们应该在单独的页面上看到完整的故事， news.aspx 。此页面将从查询字符串中获取 newsItemId ，并使用与该ID相关联的故事填充页面，例如 news.aspx？newsItemId = 1 。

然而，当我将navigateUrl字段更改为以下内容时，我得到一台服务器标签形成错误。

 < asp：HyperLink ID =headlineLinkrunat =serverText ='< ％＃Eval（标题）％>'NavigateUrl =news.aspx？newsItemId =<％＃Eval（newsItemId）％> /> 
  

非常感谢任何帮助

试试这个：

  NavigateUrl ='<％＃news.aspx？newsItemId = + Eval（newsItemId）％>'
  

I am using a datalist to display a summary of news stories stored in a SQL Server database.

<asp:DataList ID="DL_NewsSummary" runat="server" DataKeyField="newsItemId" 
    DataSourceID="DS_NewsSummary">
    <ItemTemplate>
        <h3>
            <asp:HyperLink ID="headlineLink" runat="server" Text = '<%# Eval("headline") %>' NavigateUrl="#" />
        </h3>
        <asp:Label ID="dateLabel" runat="server" Text='<%# Eval("date") %>' />
        <br />
        <asp:Label ID="introLabel" runat="server" Text='<%# Eval("intro") %>' />
        <hr />      
    </ItemTemplate>
</asp:DataList>

When the user clicks the headline hyperlink they should be taken to the full story on a separate page, news.aspx. This page will get the newsItemId from the querystring and populate the page with the story associated with that id e.g. news.aspx?newsItemId=1.

However when I change the navigateUrl field to the following I get a server tag not well formed error.

<asp:HyperLink ID="headlineLink" runat="server" Text = '<%# Eval("headline") %>' NavigateUrl="news.aspx?newsItemId=<%# Eval("newsItemId") %>" />

Any help is greatly appreciated

解决方案

Try this:

NavigateUrl='<%# "news.aspx?newsItemId=" + Eval("newsItemId") %>'

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