Asp.Net MVC4搜索ViewBag对象数组

Question

在我看来有这个代码：

List<Qux>

获得此例外：

int index = Array.FindIndex(ViewBag.EventTypes, (x) => (x.EventCode == Row.EventCode));

我如何在我看来这样做？我需要在viewbag中搜索EventCode的对象数组。还是有另一种方法可以做到这一点吗？

数组的定义和设置如下：

error CS1977: Cannot use a lambda expression as an argument to a dynamically dispatched operation without first casting it to a delegate or expression tree type

这是EventTypes对象定义：

// mycorses is a list of events.
EventTypes[] etypes = GetEventTypes(mycourses);
ViewBag.EventTypes = etypes;

Answer 1

我认为您只需添加as EventTypes[]就可以了：

int index = Array.FindIndex(ViewBag.EventTypes as EventTypes[],
                           (x) => (x.EventCode == Row.EventCode));