只使用一个条件检索两个数据ID

Question

我有这个程序“应该”只使用一个条件检索两个数据ID。

这是我的代码。谢谢。

Dim coys As String() = {"COY = 'A' AND COY = 'B'", "COY = 'C' AND COY = 'D'", "COY = 'E' AND COY = 'F'", "COY = 'G' AND COY = 'H'"} 
    Dim sec As String() = {"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", _ 
          "U", "V", "W", "X", "Y", "Z", "A2", "B2", "C2", "D2", "E2", "F2", "G2", "H2", "I2", "J2", "K2", "L2", _ 
          "M2", "N2", "O2", "P2", "Q2", "R2", "S2", "T2", "U2", "V2", "W2", "X2", "Y2", "Z2"} 



For x As Integer = 0 To coys.Length - 1 
     cn.Open() 
     Dim cmd As String = "SELECT a1, a2 a3, COY FROM AA WHERE " & coys(x) & " AND a5 = '" & class2.SelectedValue & "' ORDER BY COY, a2" 
     Dim adp As SqlDataAdapter = New SqlDataAdapter(cmd, cn) 
     adp.Fill(dt) 
     GridView2.DataSource = dt 
     GridView2.DataBind() 
     cn.Close() 
     Dim cnt As Integer = dt.Rows.Count 
     For i As Integer = 0 To numsec2.SelectedValue - 1 
      Dim vHeader As String = sec(i) 
      If Not dt.Columns.Contains(vHeader) Then 
       Dim f As New Data.DataColumn(vHeader, GetType(System.String)) 
       dt.Columns.Add(f) 
       f.AllowDBNull = True 
      End If 
     Next 
    Next 

如果我使用或coys（）阵列它显示所有的数据不承认第二个条件，如果我利用与coys（）数组这是行不通的。

Answer 1

使用OR条件，并把它在()，这样它会履行第二个条件：

Dim coys As String() = {"(COY = 'A' OR COY = 'B')", "(COY = 'C' OR COY = 'D')", "(COY = 'E' OR COY = 'F')", "(COY = 'G' OR COY = 'H')"}