如何创建与数据绑定参数声明RouteUrls？ [英] How to create RouteUrls with databound parameters declaratively?

问题描述

我用在ASP.NET 4新的路由功能（Web表单，而不是MVC）。现在我有一个asp：ListView控件被绑定到数据源。其中一个属性是客户端ID ，我想用从ListView的项目到另一个页面链接。在的Global.asax 我已经定义了一个路线：

I'm using the new Routing feature in ASP.NET 4 (Web forms, not MVC). Now I have an asp:ListView which is bound to a datasource. One of the properties is a ClientID which I want to use to link from the ListView items to another page. In global.asax I have defined a route:

System.Web.Routing.RouteTable.Routes.MapPageRoute("ClientRoute",
    "MyClientPage/{ClientID}", "~/Client.aspx");

，以便例如的http：//服务器/ MyClientPage / 2 是一个有效的URL，如果客户端ID = 2的存在

so that for instance http://server/MyClientPage/2 is a valid URL if ClientID=2 exists.

在ListView的项目我有一个asp：超链接，这样我可以创建链接：

In the ListView items I have an asp:HyperLink so that I can create the link:

<asp:HyperLink ID="HyperLinkClient" runat="server" 
    NavigateUrl='<%# "~/MyClientPage/"+Eval("ClientID") %>' >
    Go to Client details
</asp:HyperLink>

虽然这工作我会preFER使用RouteUrl前pression使用RouteName而不是硬codeD路线。例如具有恒定的ClientID = 2我可以写：

Although this works I would prefer to use the RouteName instead of the hardcoded route by using a RouteUrl expression. For instance with a constant ClientID=2 I could write:

<asp:HyperLink ID="HyperLinkClient" runat="server" 
    NavigateUrl="<%$ RouteUrl:ClientID=2,RouteName=ClientRoute %>" >
    Go to Client details
</asp:HyperLink>

现在我想知道如果我能结合的路线前pression语法和数据绑定语法。基本上我喜欢＆LT来代替恒定的 2 以上;％＃的eval（客户端ID）％＆GT; 。但是，在一个天真的方式做这...

Now I am wondering if I can combine the route expression syntax and the databinding syntax. Basically I like to replace the constant 2 above by <%# Eval("ClientID") %>. But doing this in a naive way...

<asp:HyperLink ID="HyperLinkClient" runat="server" 
    NavigateUrl='<%$ RouteUrl:ClientID=<%# Eval("ClientID") %>,RouteName=ClientRoute %>' >
    Go to Client details
</asp:HyperLink>

...不工作：＆LT;％＃的eval（客户端ID）％＆GT; 不评价，但作为一个字符串。玩弄引号的几种口味也没帮到目前为止（分析器错误在大多数情况下）。

... does not work: <%# Eval("ClientID") %> is not evaluated but considered as a string. Playing around with several flavors of quotation marks also didn't help so far (Parser errors in most cases).

问：是否有可能在所有的什么，我想在这里实现吗？如果是，什么是正确的方法是什么？

Question: Is it possible at all what I am trying to achieve here? And if yes, what's the correct way?

感谢你在前进！

推荐答案

使用<一个href=\"http://msdn.microsoft.com/en-us/library/dd992877.aspx\">System.Web.UI.Control.GetRouteUrl:

VB：

<asp:HyperLink ID="HyperLinkClient" runat="server"  
    NavigateUrl='<%# GetRouteUrl("ClientRoute", New With {.ClientID = Eval("ClientID")}) %>' > 
    Go to Client details 
</asp:HyperLink>

C＃：

<asp:HyperLink ID="HyperLinkClient" runat="server"  
    NavigateUrl='<%# GetRouteUrl("ClientRoute", new {ClientID = Eval("ClientID")}) %>' > 
    Go to Client details 
</asp:HyperLink>

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