无法在Spark视图中使用fluent html lambda表达式

Question

我正尝试在我的asp.net mvc应用程序中使用fluent html和spark view引擎。我已经分配了适当的基类，添加了程序集，当我执行this.TextBox("MyProperty")时，它工作得很好。然而，当我尝试使用this.TextBox(m=>m.MyProperty)时，我得到了下面的异常。你知道是什么导致了这一切吗？

例外：

Dynamic view compilation failed.
c:\Users\Midas\Documents\Visual Studio 2008    \Projects\ChurchMVC\ChurchMVC\Views\Poll\New.spark(6,31): error CS1660: Cannot convert     lambda expression to type 'string' because it is not a delegate type
c:\Users\Midas\Documents\Visual Studio 2008    \Projects\ChurchMVC\ChurchMVC\Views\Poll\New.spark(7,28): error CS1660: Cannot convert     lambda expression to type 'string' because it is not a delegate type

1 using MvcContrib.FluentHtml;
2 using System;
3 using System.Collections.Generic;
4 using System.Linq;
5 using System.Web.Mvc;
6 using System.Web.Mvc.Html;
7 using Microsoft.Web.Mvc;
8 using MvcContrib.FluentHtml.Elements;
9 
10 namespace ChurchMVC.Controllers
11 {
12 
13 [global::Spark.SparkViewAttribute(
14     TargetNamespace="ChurchMVC.Controllers",
15     Templates = new string[] {
16       "Poll\\New.spark",
17       "Layouts\\Application.spark",
18       "Layouts\\TwoColumn.spark",
19       "Layouts\\Base.spark"
20     })]
21 public class View6dda34d85cf14f8d8946e77056f25819 :     Spark.Web.Mvc.SparkView<ChurchMVC.Models.ViewModels.PollViewModel>
22 {
23 
24     public override System.Guid GeneratedViewId
25     { get { return new System.Guid("6dda34d85cf14f8d8946e77056f25819"); } }
26 
27     string BuildArticleBreadcumb(ChurchDAL.Section section)
28 #line 10 "C:\Users\Midas\Documents\Visual Studio 2008\Projects\ChurchMVC\ChurchMVC\Views\Shared\_global.spark"
29 {
30 #line hidden
31         using(OutputScope(new System.IO.StringWriter()))
32         {
33 #line default
34 #line 11 "C:\Users\Midas\Documents\Visual Studio 2008    \Projects\ChurchMVC\ChurchMVC\Views\Shared\_global.spark"
35     if (section == null)
36 #line default

Answer 1

如果你分配了正确的基类，那么这个异常通常意味着你的lambda表达式中有无效的属性。再检查一遍。你实际上没有展示你的spark视图，也没有显示代码。但是，举个例子，如果你有

public string Name { get; set; }

并使用

this.Hidden(x => x.Name1)

你会得到这个错误(后面跟着另一个异常)。