如何从Visual Basic中的列表框中选择一个随机项

Question

我怎样才能挑选从listBox.This随机项目是什么，我都试过了。

Public currentTrack As Integer
Public temp As Integer
Public generic As Random = New Random()
temp = gen.Next(0, listTracks.Items.Count + 1)
        currentTrack = temp
        MessageBox.Show(listTracks.Items(currentTrack))
        AxWindowsMediaPlayer1.URL = listTracks.Items(currentTrack)

当我在一个消息显示所拾取的项目它弹出2消息Boxes.Each消息框显示一个不同的项目。例如：第一消息框示出了C：\测试\ blab.mp3和第二显示C：\测试\ bleasds.mp3

Answer 1

你可以试试

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    Dim currentTrack As Integer, temp As Integer, gen As Random = New Random()
    Do
        temp = gen.Next(0, listTracks.Items.Count)
        currentTrack = temp
        Dim result1 As DialogResult = MessageBox.Show(listTracks.Items(currentTrack).ToString + vbNewLine + "Play ?",
                                                  "Play", MessageBoxButtons.YesNo)
        If result1 = DialogResult.Yes Then
            AxWindowsMediaPlayer2.URL = listTracks.Items(currentTrack).ToString
        Else
            Exit Do
        End If
    Loop
End Sub