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我非常努力地獲得兩個表我已加入顯示在視圖中(我只想顯示來自客戶表的客戶名稱和賬單中的賬單狀態表 - 它們都在CustomerId主鍵上聯合)。我花了年齡研究這個,來到只是這個觀點,我在我的控制器但是沒有當我嘗試使用下面創建另一個模型的結論:視圖中的多模型(匿名轉換錯誤)
Function ShowAll() As ViewResult
Dim BillQuery = From d In db.Bills
Join c In db.Customers On d.CustomerId Equals c.CustomerId
Select c.CustSurname, d.BillStatus
Dim BillList As List(Of BillView) = BillQuery.ToList()
Return View(BillList)
End Function
我得到一個錯誤:
價值類型的 'System.Collections.Generic.List(中)' 不能轉換爲 'System.Collections.Generic.List(中Laundry.BillView)'
這裏是我的條例草案和BillView型號:
Imports System.Data.Entity
Imports System.ComponentModel.DataAnnotations
Public Class Bill
'Key
Public Property BillId() As Integer
'Others
<Required()>
<Display(Name:="Customer ID")>
Public Property CustomerId() As String
<Required()>
<Display(Name:="Bill Status")>
Public Property BillStatus() As String
End Class
Public Class BillView
Public Property CustSurname() As String
Public Property BillStatus() As String
End Class
和客戶型號:
Imports System.Data.Entity
Imports System.ComponentModel.DataAnnotations
Public Class Customer
'Key
Public Property CustomerId() As Integer
'Others
<Display(Name:="Group ID")>
Public Property GroupId() As Integer
<Required()>
<Display(Name:="Firstname")>
Public Property CustFirstname() As String
<Required()>
<Display(Name:="Surname")>
Public Property CustSurname() As String
<Display(Name:="Email")>
Public Property CustEmail() As String
<Display(Name:="Cellphone")>
Public Property CustCellphone() As String
<Display(Name:="Address")>
Public Property CustAddress() As String
<Required()>
<Display(Name:="Status")>
Public Property CustStatus() As String
<Required()>
<Display(Name:="Account Balance")>
Public Property AccBalance() As Double
<Required()>
<Display(Name:="Loyalty Ammount")>
Public Property LoyaltyAmount() As Double
<Required()>
<Display(Name:="Customer Discount")>
Public Property PersonalDiscount() As Double
End Class
聽起來好像你需要在你的'Select'子句中構造一個新的'BillView'對象,而不是僅僅將字段選擇到這樣的匿名對象中。 (雖然我不完全知道VB的語法) – David 2012-08-11 21:27:09
正如你所看到的,BillView只是我定義的模型,因爲我無法確定如何通過LINQ創建的聯合表發送給我的視圖。 – NickP 2012-08-11 21:28:42
這是有道理的,但肯定它不能只是選擇一個BillView對象,如果一塊數據來自比爾模型和其他客戶模型? – NickP 2012-08-11 21:30:53