如何從兩張表格中獲取我的信息？

Question

Dim LocationList = 
From rows In db.Locations, clientRow In db.Clients, stateData In db.Ref_States 
Where rows.State = stateData.ID 
Select ClientName = clientRow.Name, rows.ID, rows.Address1, rows.Address2, rows.City, StateName = stateData.Name, ShortStateName = stateData.ShortName, rows.ZipCode Order By Address1 

這就是我的，這是非常錯誤的。一切都顯示出來了，但數據顯示不正確，顯示的行比現有的多。

我想我可能有它，但你可以看看我的代碼，並告訴我，如果你看到任何問題？

 Dim LocationList = 
     From rows In db.Locations, clientRow In db.Clients, stateData In db.Ref_States 
     Where rows.State = stateData.ID And rows.ClientID = ucClientID And rows.ClientID = clientRow.ID 
     Select ClientName = clientRow.Name, rows.ID, rows.Address1, rows.Address2, rows.City, StateName = stateData.Name, ShortStateName = stateData.ShortName, rows.ZipCode Order By Address1 

Answer 1

這裏假設你的外鍵映射到Location.State Ref_State.ID

Dim LocationList = From rows In db.Locations _ 
        Join rs In Ref_State On rows.State Equals rs.ID _ 
        Order By rows.Address1 _ 
        Select rs.Name 

上述回答你原來的問題。

Dim LocationList = _ 
    From clientRow In db.Clients _ 
    Join rows in db.Locations On clientRow.ID Equals rows.ClientID _ 
    Join db.stateData In Ref_States On rows.State Equals stateData.ID _ 
    Select ClientName = clientRow.Name, rows.ID, rows.Address1, rows.Address2, rows.City, StateName = stateData.Name, ShortStateName = stateData.ShortName, rows.ZipCode _ 
    Order By Address1 

與加入明確使它更具可讀性，我認爲寫作是：將客戶表之後，如下我會寫查詢。