主题：这样的datatable筛选条件该如何写（急用！！）

Dim filter As String = "第二列 = '张三'"
Dim drs As List(Of DataRow)
drs = DataTables("表A").Select(filter)
Output.Show(drs.Count )
If drs.Count > 0 Then
    For i As Integer = drs.Count -1 To 0 Step -1
        If drs(i).RowState <> DataRowState.Added Then
            drs.RemoveAt(i)
        End If
    Next
End If

Output.Show(drs.Count )