专家坐堂-[求助]随机组合出现重复怎么办？Foxtable(狐表) - 新一代数据库软件，完美融合Access、Foxpro、Excel、vb.net之优势，人人都能掌握的快速软件开发工具!

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-  Foxtable(狐表)  (http://www.foxtable.com/bbs/index.asp)
--  专家坐堂  (http://www.foxtable.com/bbs/list.asp?boardid=2)
----  [求助]随机组合出现重复怎么办？  (http://www.foxtable.com/bbs/dispbbs.asp?boardid=2&id=81832)

--  作者：农村人
--  发布时间：2016/3/7 13:52:00
--  [求助]随机组合出现重复怎么办？
Dim a() As String = {"张","林","陈"，“王”，“李”}
Dim b() As String = {"建国"，“国庆”，“旺财”}
Dim c() As String = {"男","女"}
For Index As Integer = 0 To 10
    Output.Show(a(rand.Next(0,5)) & b(rand.Next(0,3)) & c(rand.Next(0,2)))
Next

以上代码如何杜绝重复?

--  作者：大红袍
--  发布时间：2016/3/7 14:12:00
--
Dim a() As String = {"张","林","陈","王","李"}
Dim b() As String = {"建国","国庆","旺财"}
Dim c() As String = {"男","女"}
Dim ls As new List(Of String)
For Index As Integer = 0 To 10
    Dim s As String = a(rand.Next(0,5)) & b(rand.Next(0,3)) & c(rand.Next(0,2))
    If ls.Contains(s) = False
        ls.add(s)
        Output.Show(s)
    Else
        index -= 1
    End If
Next