ASP.NET GridView ItemTemplate [英] ASP.NET GridView ItemTemplate

问题描述

好的，我有一个GridView，并且如果文件存在，我想要成为一个链接，否则我只是希望它成为一个标签。现在，我正在使用参数中传递的行更改RowDataBound事件处理函数上的控件。我不是很喜欢这个，因为我很难编码列ID，如果它改变了，我将需要记住改变这个代码。我希望我可以在asp代码中做一个条件来添加一个链接，如果一个属性值不是null，否则添加一个标签。这可能吗？任何不同的解决方案？

OK I have a GridView and there is a column that I want to be a link if a file exists, otherwise I just want it to be a label. Right now I am changing the controls on RowDataBound event handler using the Row passed in the args. I am not a big fan of this as I am hard coding the column ID, and if it ever changes I will need to remember to change this code. I was hoping I could do a conditional in the asp code to add a link if a property value is not null otherwise add a label. Is this possible? Any different solutions?

我想这样的事情：

<asp:TemplateField HeaderText="Status">
   <ItemTemplate>
    <%# if (Eval("LogFileName") == null)
    <%#{ 
          <asp:LinkButton ID="LogFileLink" runat="server" CommandArgument='<% #Eval("LogFileName") %>' CommandName="DownloadLogFile" Text='<%# Blah.NDQA.Core.Utilities.GetEnumerationDescription(typeof(Blah.NDQA.Core.BatchStatus), Eval("Status")) %>'>
    <%# }
    <%# else
    <%#{
          <asp:Label ID="LogFileLabel" runat="server"Text='<%# Blah.NDQA.Core.Utilities.GetEnumerationDescription(typeof(Blah.NDQA.Core.BatchStatus), Eval("Status")) %>'>
          </asp:Label>
    </ItemTemplate>
</asp:TemplateField>

推荐答案

如果您要这么做，我建议写你自己的领域。最简单的方法可能是使一个NullableHyperlinkField继承自HyperlinkField，并且如果该锚点的URL否则为空，则渲染出一个普通字符串。

If you're going to be doing this a lot, I suggest writing your own field. The simplest approach is probably to make a NullableHyperlinkField inheriting from HyperlinkField, and render out a plain string if the anchor's URL would otherwise be null.

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