當通過分組查詢循環時找不到LINQ VB.NET變量

Question

我試圖做以下LINQ分組，它在調試器中工作（結果填充在GroupedOrders對象中。設計時間...

Name 'x' is not declared 



      Dim GroupedOrders = (From m In thisConsultant.orders _ 
         Group m By Key = m.commCode Into Group _ 
        Select commCode = Key, orders = Group) 

      For Each x In GroupedOrders 

      Next 


Public Structure consultantDetail 
    Public orders As List(Of orderDetail) 
End Structure 

Public Structure orderDetail 
    Public transactionID As Integer 
    Public qualifyingVolume As Decimal 
    Public commissionableVolume As Decimal 
    Public sponsorID As Integer 
    Public orderDate As DateTime 
    Public commCode As String 
    Public commPercentage As Decimal 
    Public discountPercent As Decimal 

End Structure 

Answer 1

嘗試與周圍的try-catch LINQ查詢。有時候，有些錯誤不是由VS2008直接來抓。

Answer 2

你有Option Infer On？

Answer 3

我猜測是你有Option Strict On和Option Infer Off。要檢查這些設置：

1. 您的項目在解決方案資源管理器中右鍵單擊
2. 選擇屬性
3. 選擇左側