狐爸:
能否将 Contains 判断是否包含时,传入的值如果是 Nothing 直接返回判断结果为False,而不出现报错
Dim el_dn As String = NothingOutput.Show(DataTables.Contains(el_dn))
Dim arr As New List(Of String)Output.Show(arr.Contains(el_dn))
Dim Str1 As String = "I like foxtable"Output.Show(Str1.Contains(el_dn))