我正在使用一个类来存储数据，然后使用控制器和视图在使用 MVC3 的网站上的屏幕上显示数据，但是我遇到了一个错误，不胜感激。
班级：
public class SampleData : DropCreateDatabaseIfModelChanges<TicketBookingEntities>
{
protected override void Seed(TicketBookingEntities context)
{
var productions = new List<Production>
{
new Production { Name = "Peter Pan" },
new Production { Name = "Mary Poppins" },
new Production { Name = "Pirates of the Carribean" },
new Production { Name = "Joseph" },
new Production { Name = "Billy Elliot" },
};
var directors = new List<Director>
{
new Director { Name = "Jason Brown" },
new Director { Name = "Dan Elish" },
new Director { Name = "Lee Hall" },
new Director { Name = "Billie Armstrong" },
new Director { Name = "Willy Russell" },
};
new List<Performance>
{
new Performance {Title = "Test", Genre = productions.Single(g => g.Name == "Peter Pan"), Director = directors.Single(a => a.Name == "Jason Brown"), Price = 9.99M, AlbumArtUrl = "/Content/Images/placeholder.gif" },
}.ForEach(a => context.Performances.Add(a));
}
}
}
控制器：
public ActionResult Browse(string genre)
{
var productionModel = storeDB.Productions.Include("Performances")
.Single(g => g.Name == genre);
return View(productionModel);
}
看法：
@model Assignment2.Models.Production
@{
ViewBag.Title = "Browse";
}
<h2>Browsing Production: @Model.Name</h2>
<ul>
@foreach (var performance in Model.Performances)
{
<li>
@performance.Title
</li>
}
</ul>
错误：
Sequence contains no elements