Bug with tuple and Typed views?

Got a werid problem with a view, if i define it with

Inherits="System.Web.Mvc.ViewPage<List<Tuple<string, DateTime?, double?, double?, double?>>>"

i get the werid error:

CS1003: Syntax error, '>' expected
Line 118:    public class views_report_intrestcalc_aspx : System.Web.Mvc.ViewPage<List<Tuple<string, System.Web.SessionState.IRequiresSessionState, System.Web.IHttpHandler {

But it workes 开发者_运维百科perfectly if i remove the last ", double?". A bug in the asp.net comiller?

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Yes, the code the ASP.NET compiler generates is broken for your example. I can re-create this (Visual Studio 2010, .NET 4, ASP.NET MVC 2) and get:

public class views_home_index_aspx : System.Web.Mvc.ViewPage<List<Tuple<string,
        System.Web.SessionState.IRequiresSessionState, System.Web.IHttpHandler {
    private static bool @__initialized;
    ...

When it should be:

public class views_home_index_aspx : System.Web.Mvc.ViewPage<List<Tuple<string,
        DateTime?, double?, double?, double?>>>, 
        System.Web.SessionState.IRequiresSessionState,
        System.Web.IHttpHandler {
    private static bool @__initialized;
    ...

Apparently, there's a limit to the amount of abuse it can take.

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While I have no idea why your code doesn't compile (it looks right) instead of using a Tuple I would strongly recommend you using a view model (probably even the compiler chokes on the ugliness :-)):

Inherits="System.Web.Mvc.ViewPage<List<MyViewModel>>"

Having:

<%: Model.Username %>
<%: Model.Date %>

is far more readable than:

<%: Model.Item1 %>
<%: Model.Item2 %>