SoundPlayer Class


Controls playback of a sound from a .wav file.

Namespace:   System.Media
Assembly:  System (in System.dll)


<HostProtectionAttribute(SecurityAction.LinkDemand, UI := True)>
Public Class SoundPlayer
	Inherits Component
	Implements ISerializable


Initializes a new instance of the SoundPlayer class.

System_CAPS_protmethodSoundPlayer(SerializationInfo, StreamingContext)

Initializes a new instance of the SoundPlayer class.


Initializes a new instance of the SoundPlayer class, and attaches the .wav file within the specified Stream.


Initializes a new instance of the SoundPlayer class, and attaches the specified .wav file.


Gets a value indicating whether the component can raise an event.(Inherited from Component.)


Gets the IContainer that contains the Component.(Inherited from Component.)


Gets a value that indicates whether the Component is currently in design mode.(Inherited from Component.)


Gets the list of event handlers that are attached to this Component.(Inherited from Component.)


Gets a value indicating whether loading of a .wav file has successfully completed.


Gets or sets the time, in milliseconds, in which the .wav file must load.


Gets or sets the ISite of the Component.(Inherited from Component.)


Gets or sets the file path or URL of the .wav file to load.


Gets or sets the Stream from which to load the .wav file.


Gets or sets the Object that contains data about the SoundPlayer.


Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object.(Inherited from MarshalByRefObject.)


Releases all resources used by the Component.(Inherited from Component.)


Releases the unmanaged resources used by the Component and optionally releases the managed resources.(Inherited from Component.)


Determines whether the specified object is equal to the current object.(Inherited from Object.)


Releases unmanaged resources and performs other cleanup operations before the Component is reclaimed by garbage collection.(Inherited from Component.)


Serves as the default hash function. (Inherited from Object.)


Retrieves the current lifetime service object that controls the lifetime policy for this instance.(Inherited from MarshalByRefObject.)


Returns an object that represents a service provided by the Component or by its Container.(Inherited from Component.)


Gets the Type of the current instance.(Inherited from Object.)


Obtains a lifetime service object to control the lifetime policy for this instance.(Inherited from MarshalByRefObject.)


Loads a sound synchronously.


Loads a .wav file from a stream or a Web resource using a new thread.


Creates a shallow copy of the current Object.(Inherited from Object.)


Creates a shallow copy of the current MarshalByRefObject object.(Inherited from MarshalByRefObject.)


Raises the LoadCompleted event.


Raises the SoundLocationChanged event.


Raises the StreamChanged event.


Plays the .wav file using a new thread, and loads the .wav file first if it has not been loaded.


Plays and loops the .wav file using a new thread, and loads the .wav file first if it has not been loaded.


Plays the .wav file and loads the .wav file first if it has not been loaded.


Stops playback of the sound if playback is occurring.


Returns a String containing the name of the Component, if any. This method should not be overridden.(Inherited from Component.)


Occurs when the component is disposed by a call to the Dispose method. (Inherited from Component.)


Occurs when a .wav file has been successfully or unsuccessfully loaded.


Occurs when a new audio source path for this SoundPlayer has been set.


Occurs when a new Stream audio source for this SoundPlayer has been set.

The SoundPlayer class provides a simple interface for loading and playing a .wav file. The SoundPlayer class supports loading a .wav file from a file path, a URL, a Stream that contains a .wav file, or an embedded resource that contains a .wav file.

To play a sound using the SoundPlayer class, configure a SoundPlayer with a path to the .wav file and call one of the play methods. You can identify the .wav file to play by using one of the constructors or by setting either the SoundLocation or Stream property. The file can be loaded prior to playing by using one of the load methods, or loading can be deferred until one of the play methods is called. A SoundPlayer configured to load a .wav file from a Stream or URL must load the .wav file into memory before playback begins.

You can load or play a .wav file synchronously or asynchronously. If you call a synchronous load or play method, the calling thread will wait until the method returns, which may cause painting and other events to be interrupted. Calling an asynchronous load or play method will allow the calling thread to continue without interruption. For more information on asynchronous method calls, see How to: Run an Operation in the Background.

When a SoundPlayer has finished loading a .wav file, it raises the LoadCompleted event. You can examine the AsyncCompletedEventArgs in your event handler to determine if the load succeeded or failed. The SoundLocationChanged event is raised when the audio source is set to a new file path or URL. The StreamChanged event is raised when the audio source is set to a new Stream. For more information about handling events, see NIB: Consuming Events.

For more information about SoundPlayer, see SoundPlayer Class Overview.


   The SoundPlayer class cannot play other file types, such as .wma or .mp3. If you want to play other file types, you can use the Windows Media Player control. For more information, see Using the Windows Media Player Control in a .NET Framework Solution and Windows Media Player Object Model Reference for Visual Basic .NET and C# in the Windows Media Player SDK.

The following code example demonstrates the use of the SoundPlayer class for playing .wav files from a local path or a Uniform Resource Identifier (URI).

Imports System
Imports System.Collections
Imports System.ComponentModel
Imports System.Diagnostics
Imports System.Drawing
Imports System.Media
Imports System.Windows.Forms

Public Class SoundTestForm
    Inherits System.Windows.Forms.Form
    Private label1 As System.Windows.Forms.Label
    Private WithEvents filepathTextbox As System.Windows.Forms.TextBox
    Private WithEvents playOnceSyncButton As System.Windows.Forms.Button
    Private WithEvents playOnceAsyncButton As System.Windows.Forms.Button
    Private WithEvents playLoopAsyncButton As System.Windows.Forms.Button
    Private WithEvents selectFileButton As System.Windows.Forms.Button

    Private WithEvents stopButton As System.Windows.Forms.Button
    Private statusBar As System.Windows.Forms.StatusBar
    Private WithEvents loadSyncButton As System.Windows.Forms.Button
    Private WithEvents loadAsyncButton As System.Windows.Forms.Button
    Private player As SoundPlayer

    Public Sub New()

        ' Initialize Forms Designer generated code.

        ' Disable playback controls until a valid .wav file 
        ' is selected.

        ' Set up the status bar and other controls.

        ' Set up the SoundPlayer object.

    End Sub

    ' Sets up the status bar and other controls.
    Private Sub InitializeControls()

        ' Set up the status bar.
        Dim panel As New StatusBarPanel
        panel.BorderStyle = StatusBarPanelBorderStyle.Sunken
        panel.Text = "Ready."
        panel.AutoSize = StatusBarPanelAutoSize.Spring
        Me.statusBar.ShowPanels = True

    End Sub

    ' Sets up the SoundPlayer object.
    Private Sub InitializeSound()

        ' Create an instance of the SoundPlayer class.
        player = New SoundPlayer

        ' Listen for the LoadCompleted event.
        AddHandler player.LoadCompleted, AddressOf player_LoadCompleted

        ' Listen for the SoundLocationChanged event.
        AddHandler player.SoundLocationChanged, AddressOf player_LocationChanged

    End Sub

    Private Sub selectFileButton_Click(ByVal sender As Object, _
        ByVal e As System.EventArgs) Handles selectFileButton.Click

        ' Create a new OpenFileDialog.
        Dim dlg As New OpenFileDialog

        ' Make sure the dialog checks for existence of the 
        ' selected file.
        dlg.CheckFileExists = True

        ' Allow selection of .wav files only.
        dlg.Filter = "WAV files (*.wav)|*.wav"
        dlg.DefaultExt = ".wav"

        ' Activate the file selection dialog.
        If dlg.ShowDialog() = System.Windows.Forms.DialogResult.OK Then
            ' Get the selected file's path from the dialog.
            Me.filepathTextbox.Text = dlg.FileName

            ' Assign the selected file's path to the SoundPlayer object.
            player.SoundLocation = filepathTextbox.Text
        End If

    End Sub

    ' Convenience method for setting message text in 
    ' the status bar.
    Private Sub ReportStatus(ByVal statusMessage As String)

        ' If the caller passed in a message...
        If (statusMessage IsNot Nothing) AndAlso _
            statusMessage <> [String].Empty Then
            ' the caller's message to the status bar.
            Me.statusBar.Panels(0).Text = statusMessage
        End If

    End Sub

    ' Enables and disables play controls.
    Private Sub EnablePlaybackControls(ByVal enabled As Boolean)

        Me.playOnceSyncButton.Enabled = enabled
        Me.playOnceAsyncButton.Enabled = enabled
        Me.playLoopAsyncButton.Enabled = enabled
        Me.stopButton.Enabled = enabled

    End Sub

    Private Sub filepathTextbox_TextChanged(ByVal sender As Object, _
        ByVal e As EventArgs) Handles filepathTextbox.TextChanged

        ' Disable playback controls until the new .wav is loaded.

    End Sub

    Private Sub loadSyncButton_Click(ByVal sender As Object, _
        ByVal e As System.EventArgs) Handles loadSyncButton.Click

        ' Disable playback controls until the .wav is successfully
        ' loaded. The LoadCompleted event handler will enable them.

            ' Assign the selected file's path to the SoundPlayer object.
            player.SoundLocation = filepathTextbox.Text

            ' Load the .wav file.
        Catch ex As Exception
        End Try

    End Sub

    Private Sub loadAsyncButton_Click(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles loadAsyncButton.Click

        ' Disable playback controls until the .wav is successfully
        ' loaded. The LoadCompleted event handler will enable them.

            ' Assign the selected file's path to the SoundPlayer object.
            player.SoundLocation = Me.filepathTextbox.Text

            ' Load the .wav file.
        Catch ex As Exception
        End Try

    End Sub

    ' Synchronously plays the selected .wav file once.
    ' If the file is large, UI response will be visibly 
    ' affected.
    Private Sub playOnceSyncButton_Click(ByVal sender As Object, _
        ByVal e As System.EventArgs) Handles playOnceSyncButton.Click

        ReportStatus("Playing .wav file synchronously.")
        ReportStatus("Finished playing .wav file synchronously.")
    End Sub

    ' Asynchronously plays the selected .wav file once.
    Private Sub playOnceAsyncButton_Click(ByVal sender As Object, _
        ByVal e As System.EventArgs) Handles playOnceAsyncButton.Click

        ReportStatus("Playing .wav file asynchronously.")

    End Sub

    ' Asynchronously plays the selected .wav file until the user
    ' clicks the Stop button.
    Private Sub playLoopAsyncButton_Click(ByVal sender As Object, _
        ByVal e As System.EventArgs) Handles playLoopAsyncButton.Click

        ReportStatus("Looping .wav file asynchronously.")

    End Sub

    ' Stops the currently playing .wav file, if any.
    Private Sub stopButton_Click(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles stopButton.Click

        ReportStatus("Stopped by user.")

    End Sub

    ' Handler for the LoadCompleted event.
    Private Sub player_LoadCompleted(ByVal sender As Object, _
        ByVal e As AsyncCompletedEventArgs)

        Dim message As String = [String].Format("LoadCompleted: {0}", _

    End Sub

    ' Handler for the SoundLocationChanged event.
    Private Sub player_LocationChanged(ByVal sender As Object, _
        ByVal e As EventArgs)
        Dim message As String = [String].Format("SoundLocationChanged: {0}", _
    End Sub

    Private Sub playSoundFromResource(ByVal sender As Object, _
    ByVal e As EventArgs)
        Dim a As System.Reflection.Assembly = System.Reflection.Assembly.GetExecutingAssembly()
        Dim s As System.IO.Stream = a.GetManifestResourceStream("<AssemblyName>.chimes.wav")
        Dim player As SoundPlayer = New SoundPlayer(s)
    End Sub

    Private Sub InitializeComponent()
        Me.filepathTextbox = New System.Windows.Forms.TextBox
        Me.selectFileButton = New System.Windows.Forms.Button
        Me.label1 = New System.Windows.Forms.Label
        Me.loadSyncButton = New System.Windows.Forms.Button
        Me.playOnceSyncButton = New System.Windows.Forms.Button
        Me.playOnceAsyncButton = New System.Windows.Forms.Button
        Me.stopButton = New System.Windows.Forms.Button
        Me.playLoopAsyncButton = New System.Windows.Forms.Button
        Me.statusBar = New System.Windows.Forms.StatusBar
        Me.loadAsyncButton = New System.Windows.Forms.Button
        ' filepathTextbox
        Me.filepathTextbox.Anchor = CType(System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left Or System.Windows.Forms.AnchorStyles.Right, System.Windows.Forms.AnchorStyles)
        Me.filepathTextbox.Location = New System.Drawing.Point(7, 25)
        Me.filepathTextbox.Name = "filepathTextbox"
        Me.filepathTextbox.Size = New System.Drawing.Size(263, 20)
        Me.filepathTextbox.TabIndex = 1
        Me.filepathTextbox.Text = ""
        ' selectFileButton
        Me.selectFileButton.Anchor = CType(System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Right, System.Windows.Forms.AnchorStyles)
        Me.selectFileButton.Location = New System.Drawing.Point(276, 25)
        Me.selectFileButton.Name = "selectFileButton"
        Me.selectFileButton.Size = New System.Drawing.Size(23, 21)
        Me.selectFileButton.TabIndex = 2
        Me.selectFileButton.Text = "..."
        ' label1
        Me.label1.Location = New System.Drawing.Point(7, 7)
        Me.label1.Name = "label1"
        Me.label1.Size = New System.Drawing.Size(145, 17)
        Me.label1.TabIndex = 3
        Me.label1.Text = ".wav path or URL:"
        ' loadSyncButton
        Me.loadSyncButton.Location = New System.Drawing.Point(7, 53)
        Me.loadSyncButton.Name = "loadSyncButton"
        Me.loadSyncButton.Size = New System.Drawing.Size(142, 23)
        Me.loadSyncButton.TabIndex = 4
        Me.loadSyncButton.Text = "Load Synchronously"
        ' playOnceSyncButton
        Me.playOnceSyncButton.Location = New System.Drawing.Point(7, 86)
        Me.playOnceSyncButton.Name = "playOnceSyncButton"
        Me.playOnceSyncButton.Size = New System.Drawing.Size(142, 23)
        Me.playOnceSyncButton.TabIndex = 5
        Me.playOnceSyncButton.Text = "Play Once Synchronously"
        ' playOnceAsyncButton
        Me.playOnceAsyncButton.Location = New System.Drawing.Point(149, 86)
        Me.playOnceAsyncButton.Name = "playOnceAsyncButton"
        Me.playOnceAsyncButton.Size = New System.Drawing.Size(147, 23)
        Me.playOnceAsyncButton.TabIndex = 6
        Me.playOnceAsyncButton.Text = "Play Once Asynchronously"
        ' stopButton
        Me.stopButton.Location = New System.Drawing.Point(149, 109)
        Me.stopButton.Name = "stopButton"
        Me.stopButton.Size = New System.Drawing.Size(147, 23)
        Me.stopButton.TabIndex = 7
        Me.stopButton.Text = "Stop"
        ' playLoopAsyncButton
        Me.playLoopAsyncButton.Location = New System.Drawing.Point(7, 109)
        Me.playLoopAsyncButton.Name = "playLoopAsyncButton"
        Me.playLoopAsyncButton.Size = New System.Drawing.Size(142, 23)
        Me.playLoopAsyncButton.TabIndex = 8
        Me.playLoopAsyncButton.Text = "Loop Asynchronously"
        ' statusBar
        Me.statusBar.Location = New System.Drawing.Point(0, 146)
        Me.statusBar.Name = "statusBar"
        Me.statusBar.Size = New System.Drawing.Size(306, 22)
        Me.statusBar.SizingGrip = False
        Me.statusBar.TabIndex = 9
        Me.statusBar.Text = "(no status)"
        ' loadAsyncButton
        Me.loadAsyncButton.Location = New System.Drawing.Point(149, 53)
        Me.loadAsyncButton.Name = "loadAsyncButton"
        Me.loadAsyncButton.Size = New System.Drawing.Size(147, 23)
        Me.loadAsyncButton.TabIndex = 10
        Me.loadAsyncButton.Text = "Load Asynchronously"
        ' SoundTestForm
        Me.ClientSize = New System.Drawing.Size(306, 168)
        Me.MinimumSize = New System.Drawing.Size(310, 165)
        Me.Name = "SoundTestForm"
        Me.SizeGripStyle = System.Windows.Forms.SizeGripStyle.Show
        Me.Text = "Sound API Test Form"
    End Sub 'InitializeComponent

    <STAThread()> _
    Shared Sub Main()
        Application.Run(New SoundTestForm)
    End Sub
End Class 'SoundTestForm

.NET Framework
Available since 2.0

Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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