LinQ在LIKE操作

Question

我需要與使用LINQ查詢中的正常SQL LIKE操作%%幫助。

這是行的數據稱爲類型（多數民衆贊成在正常的查詢返回不喜歡運營商）：

Independent Contractor 
Lease Program 
Teams 
Teams interested 

這是我（未遂）LINQ查詢：

Public Shared Function SelectActiveByState(
    ByVal state_abbr As String, 
    ByVal catagory As String) As List(Of theLocations) 

    Dim db As New MasterData 
    db.CommandTimeout = 240 

    Try    
     Return (_ 
      From hl In db.Locations _ 
      Where hl.Active = True _ 
      And (_ 
       hl.State = state_abbr Or _ 
       hl.AlternateLocation.Contains(state_abbr) And _ 
       hl.Type.Contains("/" & catagory & "/") _ 
      ) _ 
      Order By hl.Type Select hl).ToList() 

    Catch ex As Exception 
     Return Nothing 
    End Try 
End Function 

如果我遺漏了和hl.Type.Contains（「/」&類別&「/」）查詢工作得很好（返回4條記錄）。但是當我添加該部分時，無論我的操作符如何，它都會返回相同的記錄。

Answer 1

而不是

hl.Type.Contains("/" & catagory & "/") 

試試這個：

SqlMethods.Like(hl.Type, "%"& category &"%") 

編輯：

我不擅長與VB.Net語法。

編輯：

其實你的LINQ查詢的結果SQL變爲：

SELECT * 
FROM myTable 
WHERE State = state_abbr OR 
     AlternateLocation LIKE state_abbr AND 
     Type LIKE category 

，但你需要這個，我想：

SELECT * 
FROM myTable 
WHERE (State = state_abbr OR 
     AlternateLocation LIKE state_abbr) AND 
     Type LIKE category 

試試這個：

Return (_ 
    From hl In db.Locations _ 
    Where hl.Active = True _ 
    And (_ 
     (hl.State = state_abbr Or _ 
     hl.AlternateLocation.Contains(state_abbr)) And _ 
     SqlMethods.Like(hl.Type, "%"& category &"%") _ 
    ) _ 
    Order By hl.Type Select hl).ToList() 

Answer 2

我想通了使用某些@Yaqub艾哈邁德代碼：

Public Shared Function SelectActiveByState(
    ByVal state_abbr As String, 
    ByVal catagory As String) As List(Of theLocations) 

    Dim db As New MasterData 
    db.CommandTimeout = 240 

    Try    
     Return (_ 
      From hl In db.Locations _ 
      Where hl.Active = True _ 
      And (_ 
       (hl.State = state_abbr Or _ 
       hl.AlternateLocation.Contains(state_abbr)) And _ 
       System.Data.Linq.SqlClient.SqlMethods.Like(hl.Type, "%" & category & "%") _ 
      ) _ 
      Order By hl.Type Select hl).ToList() 

    Catch ex As Exception 
     Return Nothing 
    End Try 
End Function