mp3player.vb

这是一本用Visual Studio.NET进行多媒体编程的读物

Option Strict Off
Option Explicit On
Friend Class Form1
	Inherits System.Windows.Forms.Form
#Region "Windows 窗体设计器生成的代码"
	Public Sub New()
		MyBase.New()
		If m_vb6FormDefInstance Is Nothing Then
			If m_InitializingDefInstance Then
				m_vb6FormDefInstance = Me
			Else
				Try 
					'对于启动窗体，所创建的第一个实例为默认实例。
					If System.Reflection.Assembly.GetExecutingAssembly.EntryPoint.DeclaringType Is Me.GetType Then
						m_vb6FormDefInstance = Me
					End If
				Catch
				End Try
			End If
		End If
		'此调用是 Windows 窗体设计器所必需的。
		InitializeComponent()
	End Sub
	'窗体重写处置，以清理组件列表。
	Protected Overloads Overrides Sub Dispose(ByVal Disposing As Boolean)
		If Disposing Then
			If Not components Is Nothing Then
				components.Dispose()
			End If
		End If
		MyBase.Dispose(Disposing)
	End Sub
    Private components As System.ComponentModel.IContainer
	'Windows 窗体设计器所必需的
    Public ToolTip1 As System.Windows.Forms.ToolTip
	Public WithEvents cmdExit As System.Windows.Forms.Button
	Public WithEvents cmdStop As System.Windows.Forms.Button
	Public WithEvents cmdNext As System.Windows.Forms.Button
	Public WithEvents cmdContinue As System.Windows.Forms.Button
	Public WithEvents cmdPause As System.Windows.Forms.Button
	Public WithEvents cmdPlay As System.Windows.Forms.Button
	Public WithEvents Text1 As System.Windows.Forms.TextBox
	Public WithEvents CommonDialog1 As AxMSComDlg.AxCommonDialog
	Public WithEvents MediaPlayer1 As AxMediaPlayer.AxMediaPlayer
	'注意：以下过程是 Windows 窗体设计器所必需的
	'可以使用 Windows 窗体设计器来修改它。
	'不要使用代码编辑器来修改它。
	<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.components = New System.ComponentModel.Container()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(Form1))
        Me.ToolTip1 = New System.Windows.Forms.ToolTip(Me.components)
        Me.cmdExit = New System.Windows.Forms.Button()
        Me.cmdStop = New System.Windows.Forms.Button()
        Me.cmdPlay = New System.Windows.Forms.Button()
        Me.MediaPlayer1 = New AxMediaPlayer.AxMediaPlayer()
        Me.CommonDialog1 = New AxMSComDlg.AxCommonDialog()
        Me.Text1 = New System.Windows.Forms.TextBox()
        Me.cmdPause = New System.Windows.Forms.Button()
        Me.cmdNext = New System.Windows.Forms.Button()
        Me.cmdContinue = New System.Windows.Forms.Button()
        CType(Me.MediaPlayer1, System.ComponentModel.ISupportInitialize).BeginInit()
        CType(Me.CommonDialog1, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'cmdExit
        '
        Me.cmdExit.BackColor = System.Drawing.SystemColors.Control
        Me.cmdExit.Cursor = System.Windows.Forms.Cursors.Default
        Me.cmdExit.Location = New System.Drawing.Point(266, 93)
        Me.cmdExit.Name = "cmdExit"
        Me.cmdExit.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.cmdExit.Size = New System.Drawing.Size(104, 28)
        Me.cmdExit.TabIndex = 7
        Me.cmdExit.Text = "退出"
        '
        'cmdStop
        '
        Me.cmdStop.BackColor = System.Drawing.SystemColors.Control
        Me.cmdStop.Cursor = System.Windows.Forms.Cursors.Default
        Me.cmdStop.Location = New System.Drawing.Point(143, 93)
        Me.cmdStop.Name = "cmdStop"
        Me.cmdStop.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.cmdStop.Size = New System.Drawing.Size(104, 28)
        Me.cmdStop.TabIndex = 6
        Me.cmdStop.Text = "停止"
        '
        'cmdPlay
        '
        Me.cmdPlay.BackColor = System.Drawing.SystemColors.Control
        Me.cmdPlay.Cursor = System.Windows.Forms.Cursors.Default
        Me.cmdPlay.ForeColor = System.Drawing.SystemColors.ControlDarkDark
        Me.cmdPlay.Location = New System.Drawing.Point(20, 56)
        Me.cmdPlay.Name = "cmdPlay"
        Me.cmdPlay.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.cmdPlay.Size = New System.Drawing.Size(104, 28)
        Me.cmdPlay.TabIndex = 2
        Me.cmdPlay.Text = "播放"
        '
        'MediaPlayer1
        '
        Me.MediaPlayer1.Location = New System.Drawing.Point(0, 168)
        Me.MediaPlayer1.Name = "MediaPlayer1"
        Me.MediaPlayer1.OcxState = CType(resources.GetObject("MediaPlayer1.OcxState"), System.Windows.Forms.AxHost.State)
        Me.MediaPlayer1.Size = New System.Drawing.Size(46, 31)
        Me.MediaPlayer1.TabIndex = 0
        '
        'CommonDialog1
        '
        Me.CommonDialog1.Enabled = True
        Me.CommonDialog1.Location = New System.Drawing.Point(328, 93)
        Me.CommonDialog1.Name = "CommonDialog1"
        Me.CommonDialog1.OcxState = CType(resources.GetObject("CommonDialog1.OcxState"), System.Windows.Forms.AxHost.State)
        Me.CommonDialog1.Size = New System.Drawing.Size(32, 32)
        Me.CommonDialog1.TabIndex = 8
        '
        'Text1
        '
        Me.Text1.AcceptsReturn = True
        Me.Text1.AutoSize = False
        Me.Text1.BackColor = System.Drawing.Color.Black
        Me.Text1.Cursor = System.Windows.Forms.Cursors.IBeam
        Me.Text1.ForeColor = System.Drawing.Color.Yellow
        Me.Text1.Location = New System.Drawing.Point(16, 8)
        Me.Text1.MaxLength = 0
        Me.Text1.Name = "Text1"
        Me.Text1.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.Text1.Size = New System.Drawing.Size(360, 29)
        Me.Text1.TabIndex = 1
        Me.Text1.Text = "Text1"
        '
        'cmdPause
        '
        Me.cmdPause.BackColor = System.Drawing.SystemColors.Control
        Me.cmdPause.Cursor = System.Windows.Forms.Cursors.Default
        Me.cmdPause.Location = New System.Drawing.Point(143, 56)
        Me.cmdPause.Name = "cmdPause"
        Me.cmdPause.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.cmdPause.Size = New System.Drawing.Size(104, 28)
        Me.cmdPause.TabIndex = 3
        Me.cmdPause.Text = "暂停"
        '
        'cmdNext
        '
        Me.cmdNext.BackColor = System.Drawing.SystemColors.Control
        Me.cmdNext.Cursor = System.Windows.Forms.Cursors.Default
        Me.cmdNext.Location = New System.Drawing.Point(20, 93)
        Me.cmdNext.Name = "cmdNext"
        Me.cmdNext.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.cmdNext.Size = New System.Drawing.Size(104, 28)
        Me.cmdNext.TabIndex = 5
        Me.cmdNext.Text = "下一曲"
        '
        'cmdContinue
        '
        Me.cmdContinue.BackColor = System.Drawing.SystemColors.Control
        Me.cmdContinue.Cursor = System.Windows.Forms.Cursors.Default
        Me.cmdContinue.Location = New System.Drawing.Point(266, 56)
        Me.cmdContinue.Name = "cmdContinue"
        Me.cmdContinue.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.cmdContinue.Size = New System.Drawing.Size(104, 28)
        Me.cmdContinue.TabIndex = 4
        Me.cmdContinue.Text = "继续"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(394, 135)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.cmdExit, Me.cmdStop, Me.cmdNext, Me.cmdContinue, Me.cmdPause, Me.cmdPlay, Me.Text1, Me.CommonDialog1, Me.MediaPlayer1})
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedToolWindow
        Me.Location = New System.Drawing.Point(3, 22)
        Me.MaximizeBox = False
        Me.MinimizeBox = False
        Me.Name = "Form1"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.Manual
        Me.Text = "MP3Player......"
        CType(Me.MediaPlayer1, System.ComponentModel.ISupportInitialize).EndInit()
        CType(Me.CommonDialog1, System.ComponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)

    End Sub
#End Region 
#Region "升级支持"
	Private Shared m_vb6FormDefInstance As Form1
	Private Shared m_InitializingDefInstance As Boolean
	Public Shared Property DefInstance() As Form1
		Get
			If m_vb6FormDefInstance Is Nothing OrElse m_vb6FormDefInstance.IsDisposed Then
				m_InitializingDefInstance = True
				m_vb6FormDefInstance = New Form1()
				m_InitializingDefInstance = False
			End If
			DefInstance = m_vb6FormDefInstance
		End Get
		Set
			m_vb6FormDefInstance = Value
		End Set
	End Property
#End Region 
	
	Private Sub cmdContinue_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles cmdContinue.Click
		Text1.Focus()
		MediaPlayer1.Play()
		cmdPlay.Enabled = False
		cmdPause.Enabled = True
		cmdContinue.Enabled = False
	End Sub
	
	Private Sub cmdExit_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles cmdExit.Click
		MediaPlayer1.Stop()
		End
	End Sub
	
	Private Sub cmdNext_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles cmdNext.Click
		On Error GoTo NextErr '播放非m3u文件时只能播放单曲
		Exit Sub
NextErr: 
		MsgBox("现在正在播放单曲，没有一下曲。", MsgBoxStyle.OKOnly, "出错信息")
		
	End Sub
	
	Private Sub cmdPause_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles cmdPause.Click
		Text1.Focus()
		MediaPlayer1.Pause()
		cmdPause.Enabled = False
		cmdContinue.Enabled = True
	End Sub
	
	Private Sub cmdPlay_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles cmdPlay.Click
		Text1.Focus()
		On Error GoTo handler
		With CommonDialog1
			.InitDir = VB6.GetPath
			.Filter = "Midi Files(*.mid)|*.mid|MP3 Files(*.mp3)|*.mp3|Wave Filse(*.wav)|*.wav|(*.m3u)|*.m3u"
			.FilterIndex = 2
			.FileName = ""
			.ShowOpen()
		End With
		MediaPlayer1.FileName = CommonDialog1.FileName
		MediaPlayer1.Play()
		Text1.Text = " 正在播放：" & CommonDialog1.FileName
		cmdPlay.Enabled = False
		cmdPause.Enabled = True
		cmdContinue.Enabled = False
		cmdStop.Enabled = True
		Exit Sub
handler: 
		MsgBox("未选择媒体文件。", MsgBoxStyle.OKOnly, "错误信息")
	End Sub
	
	Private Sub cmdStop_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles cmdStop.Click
		MediaPlayer1.Stop()
		cmdPlay.Enabled = True
		cmdPause.Enabled = False
		cmdContinue.Enabled = False
		cmdStop.Enabled = False
		
	End Sub
	
	Private Sub Form1_Load(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles MyBase.Load
		MediaPlayer1.Visible = False
        cmdContinue.Enabled = False
        cmdPause.Enabled = False
        cmdStop.Enabled = False
        Text1.Text = "本播放器支持各种音乐格式。谢谢使用。"
        Text1.BackColor = System.Drawing.Color.Black
        Text1.ForeColor = System.Drawing.Color.Yellow
	End Sub
End Class