from t in info where (t.N = "n1" And t.V.Contains("v1")) Or (t.N = "n2" And t.V.Contains("v2")) Or (t.N = "n3" And t.V.Contains("v3"))
这个运行正确。
但实际上查询的关键字是动态的，数量是未知的，于是建立一个 Dictionary(Of String, String)：
Dim keyList As New Dictionary(Of String, String)
keyList.Add("n1","v1")
keyList.Add("n2","v2")
keyList.Add("n3","v3")
....
....
dim _q = From t In info
For Each key As String In keyList.Keys
dim _v As String = keyList(key)
_q = _q.Where(Function (x) x.N = key And x.V.Contains(_v))
Next
这样最终的查询条件就全都是 And 而不是前一个的OR b ，结果当然不正确。
请教各位如何这种情况如何实现？
