主题：[求助]关于随机问题

如附件，

下载信息  [文件大小：   下载次数： ]

点击浏览该文件:测试 - 副本.zip

Dim dt1 As DataTable = DataTables("抽取数据表")
Dim dt2 As DataTable = DataTables("表C")
Dim count As Integer = 20

Dim cnt As Integer = count
Dim ids(cnt - 1) As Integer
For i As Integer = 0 To cnt -1
    ids(i) = i
Next
For i As Integer = 0 To cnt  '洗牌次数
    Dim id1 As Integer = rand.Next(0,cnt)
    Dim id2 As Integer = rand.Next(0,cnt)
    Dim vid As Integer = ids(id1)
    ids(id1) = ids(id2)
    ids(id2) = vid
Next

Dim rys = dt2.GetValues("第一列", "第一列 is not null")
For i As Integer = 0 To ids.length-1
    Dim ndr = dt1.AddNew
    ndr("所属管段") = ids(i)
    ndr("立刻就看见") = rys(i Mod 5)
Next

此主题相关图片如下：微信图片_20190417160828.png

可能我没表述清楚，现在的情况是抽取之后，点击随机管段，是在下面增加了相应的行数

不理解你什么意思

 

Dim dt1 As DataTable = DataTables("抽取数据表")
Dim dt2 As DataTable = DataTables("表C")
Dim count As Integer = 20

Dim cnt As Integer = dt1.datarows.count
Dim ids(cnt - 1) As Integer
For i As Integer = 0 To cnt -1
    ids(i) = i
Next
For i As Integer = 0 To cnt*10  '洗牌次数
    Dim id1 As Integer = rand.Next(0,cnt)
    Dim id2 As Integer = rand.Next(0,cnt)
    Dim vid As Integer = ids(id1)
    ids(id1) = ids(id2)
    ids(id2) = vid
Next
Dim rnd = rand.Next(cnt-count)
Dim rys = dt2.GetValues("第一列", "第一列 is not null")
For i As Integer = 0 To count-1
    Dim dr As DataRow = dt1.DataRows(rnd+i)
    dr("立刻就看见") = rys(i Mod 5)
Next