Linq Group出错

Question

我在这里做错了什么？

我定义了以下对象：

Public Class MyClass
    Public Var1 As String
    Public StartDate As Date
    Public EndDate As Date
End Class

在我的主要内容中，我有：

Dim x as New List(Of MyClass)

现在，我想对此进行分组，以便所有组都具有匹配开始日期和结束日期的信息。我认为应该这样做：

From Req In x
Group Req By strtdt = Req.StartDate, enddt = Req.EndDate Into grp
Select ...

现在，我已经尝试了几种不同的方法，每次都会遇到不同的错误：

---

1）

From Req In x
Group Req By strtdt = Req.StartDate, enddt = Req.EndDate Into grp
Select ...

错误：Definition of method 'grp' is not accessible in this context（带下划线的grp（））

---

2）

From Req In x
Group Req By New With {strtdt = Req.StartDate, enddt = Req.EndDate} Into grp
Select ...

错误：Type or 'With' expected（第一个大括号加下划线）

---

我做错了什么???

谢谢！

Answer 1

这样的事情应该有效：

    Dim y = From Req In x _
        Group Req By key = New With { .strtdt = Req.StartDate, .enddt = Req.EndDate } Into Group _
        Select Item = key, DateGroup = Group