如何将 "x" 个列表框项分组并添加到另一个列表框?

How to group "x" listbox items and add to another listbox?

我必须对 listbox1 的 5 个项目进行分组,并将它们转换为字符串以添加到 listbox2。这是我到目前为止的代码:

dim s as string=""    'a string to collect listbox1 items 
dim count as integer=Listbox1.items.count

  Do While count > 0
        Select Case count

           Case Is <= 5
                For i = 0 To ListBox1.Items.Count - 1
                    s &= ListBox1.Items.Item(i).ToString
                    ListBox1.Items.RemoveAt(i)
                Next
                ListBox2.Items.Add(s)
                Exit Do 'If there are <=5 items, then done , exit loop

           Case Is > 5
                For i = 0 To 4
                    s &= ListBox1.Items.Item(i).ToString
                    ListBox1.Items.RemoveAt(i) 'delete each item in listbox1, after add
                Next
                ListBox2.Items.Add(s)
                s = "" ' Reset the s string to receive new items
                count = count - 5  'reduce count and loop over again
               End Select
Loop

不知何故,我几乎可以将 Listbox1 中的项目分成 5 组并添加到 Listbox2,但是在循环之后 listbox1 中还有一些剩余(我看如果我有 8 个项目然后剩下 3 个)。你们能告诉我上面的代码哪里错了吗?

非常感谢~

我觉得你的算法太复杂了,下面是我的处理方法。

希望对您有所帮助 格雷厄姆

    '
    ' Move items from ListBox1 to ListBox2
    '
    Dim s As String = ""
    For count As Integer = 0 To ListBox1.Items.Count - 1


        ' update every 5

        If (count Mod 5 = 0) Then

            ' Only update if not the first time
            If (count <> 0) Then
                ListBox2.Items.Add(s)
                s = ""
            End If
        End If
        s = s + ListBox1.Items.Item(count).ToString

    Next

    '
    ' Add the last ones
    '

    If (s <> "") Then
        ListBox2.Items.Add(s)
    End If

    '
    ' Clear down listbox 1
    '
    ListBox1.Items.Clear()