Question

我必须分组，说明listbox1的5项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，我可以将Listbox1中的几乎所有项组合成5个组并添加到Listbox2，但是在循环之后的listbox1中还有一些（我看是否有8个项目然后剩下3个）。你们能告诉我上面的代码我错在哪里吗？

非常感谢〜

Answer 1

我认为你的算法太复杂了，下面是我接近它的方法。

希望这会有所帮助格雷厄姆

    '
    ' 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()

如何将“x”列表框项目分组并添加到另一个列表框？

1 个答案: