Linq Group By Errors

Question

我在這裏做錯了什麼？

我有以下對象定義：

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

而在我的主子，我有：

Dim x as New List(Of MyClass) 

現在，我希望將有這使得所有羣體都會有信息匹配開始日期和結束日期。我想這應該這樣做：

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

現在，我已經在幾個不同的方式嘗試這樣做，每次得到不同的錯誤：

---

1）

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

錯誤： Definition of method 'grp' is not accessible in this context（grp（）下劃線）

---

2）

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

ERROR：Type or 'With' expected（第一大括號下劃線）

---

我在做什麼錯???

謝謝！

Answer 1

像這樣的東西應該工作：

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