Como: Tocar sons
Este exemplo demonstra sistema autônomo usar invocação de plataforma para executar dois arquivos WAV, um sistema autônomo um recurso inserido e o Outros sistema autônomo conteúdo.
To implement your WAV file as an embedded resource in Visual Studio, in the Properties pane, set its BuildAction property to "Embedded Resource." Se você está compilando na linha de comando, consulte Como: Compilar no aviso de comando Para obter informações sobre compilar um recurso inserido.
Observação: |
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A versão 3.5 do .NET Compact estrutura oferece suporte SoundPlayer para executar sons.Para obter mais informações, consulte SoundPlayer in the .NET Compact estrutura. |
Este exemplo define o Sound classe que fornece a funcionalidade de código nativo a seguir usando CoreDll.dll no Windows CE:
Declarações de método para executar um som usando um nome de arquivo ou um fluxo de invocação de plataforma.
Uma enumeração de valores de bits para passar argumentos na chamada de método da chamada de plataforma.
A Play método que chama a plataforma correta chamar o método para executar um arquivo separado ou recurso inserido.
Este exemplo usa um arquivo de som denominado Chimes.wav.Quando você inclui o arquivo de som sistema autônomo um reurso incorporado, você retornar o fluxo de recurso para o arquivo, anexando ao início do assembly namespace ao nome de arquivo original na telefonar para GetManifestResourceStream.
Para executar sons usando invocação de plataforma
Adicionar o Sound classe para seus projetos.
Public Class Sound Private m_soundBytes() As Byte Private m_fileName As String Public Declare Function WCE_PlaySound Lib "CoreDll.dll" Alias "PlaySound" (ByVal szSound As String, ByVal hMod As IntPtr, ByVal flags As Integer) As Integer Public Declare Function WCE_PlaySoundBytes Lib "CoreDll.dll" Alias "PlaySound" (ByVal szSound() As Byte, ByVal hMod As IntPtr, ByVal flags As Integer) As Integer Private Enum Flags SND_SYNC = &H0 ' play synchronously (default) SND_ASYNC = &H1 ' play asynchronously SND_NODEFAULT = &H2 ' silence (!default) if sound not found SND_MEMORY = &H4 ' pszSound points to a memory file SND_LOOP = &H8 ' loop the sound until next sndPlaySound SND_NOSTOP = &H10 ' don't stop any currently playing sound SND_NOWAIT = &H2000 ' don't wait if the driver is busy SND_ALIAS = &H10000 ' name is a registry alias SND_ALIAS_ID = &H110000 ' alias is a predefined ID SND_FILENAME = &H20000 ' name is file name SND_RESOURCE = &H40004 ' name is resource name or atom End Enum ' Construct the Sound object to play sound data from the specified file. Public Sub New(ByVal fileName As String) m_fileName = fileName End Sub ' Construct the Sound object to play sound data from the specified stream. Public Sub New(ByVal stream As Stream) ' read the data from the stream m_soundBytes = New Byte(stream.Length) {} stream.Read(m_soundBytes, 0, Fix(stream.Length)) End Sub 'New ' Play the sound Public Sub Play() ' If a file name has been registered, call WCE_PlaySound, ' otherwise call WCE_PlaySoundBytes. If Not (m_fileName Is Nothing) Then WCE_PlaySound(m_fileName, IntPtr.Zero, Fix(Flags.SND_ASYNC Or Flags.SND_FILENAME)) Else WCE_PlaySoundBytes(m_soundBytes, IntPtr.Zero, Fix(Flags.SND_ASYNC Or Flags.SND_MEMORY)) End If End Sub End Class
public class Sound { private byte[] m_soundBytes; private string m_fileName; private enum Flags { SND_SYNC = 0x0000, /* play synchronously (default) */ SND_ASYNC = 0x0001, /* play asynchronously */ SND_NODEFAULT = 0x0002, /* silence (!default) if sound not found */ SND_MEMORY = 0x0004, /* pszSound points to a memory file */ SND_LOOP = 0x0008, /* loop the sound until next sndPlaySound */ SND_NOSTOP = 0x0010, /* don't stop any currently playing sound */ SND_NOWAIT = 0x00002000, /* don't wait if the driver is busy */ SND_ALIAS = 0x00010000, /* name is a registry alias */ SND_ALIAS_ID = 0x00110000, /* alias is a predefined ID */ SND_FILENAME = 0x00020000, /* name is file name */ SND_RESOURCE = 0x00040004 /* name is resource name or atom */ } [DllImport("CoreDll.DLL", EntryPoint="PlaySound", SetLastError=true)] private extern static int WCE_PlaySound(string szSound, IntPtr hMod, int flags); [DllImport("CoreDll.DLL", EntryPoint="PlaySound", SetLastError=true)] private extern static int WCE_PlaySoundBytes (byte[] szSound, IntPtr hMod, int flags); /// <summary> /// Construct the Sound object to play sound data from the specified file. /// </summary> public Sound (string fileName) { m_fileName = fileName; } /// <summary> /// Construct the Sound object to play sound data from the specified stream. /// </summary> public Sound(Stream stream) { // read the data from the stream m_soundBytes = new byte [stream.Length]; stream.Read(m_soundBytes, 0,(int)stream.Length); } /// <summary> /// Play the sound /// </summary> public void Play () { // if a file name has been registered, call WCE_PlaySound, // otherwise call WCE_PlaySoundBytes if (m_fileName != null) WCE_PlaySound(m_fileName, IntPtr.Zero, (int) (Flags.SND_ASYNC | Flags.SND_FILENAME)); else WCE_PlaySoundBytes (m_soundBytes, IntPtr.Zero, (int) (Flags.SND_ASYNC | Flags.SND_MEMORY)); } }
Adicionar métodos para criar uma instância do Sound classe e para executar um arquivo, sistema autônomo em um botão Click evento.
' To return a Stream object associated with an embedded ' resource, you must prepend the namespace to the original ' name of the file in the project. Private Sub btnEmbedded_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnEmbedded.Click Dim sound As New Sound([Assembly].GetExecutingAssembly().GetManifestResourceStream("SoundSample.chimes.wav")) sound.Play() End Sub Private Sub btnFile_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnFile.Click Dim sound As New Sound("Program Files\SoundSample\chord.wav") sound.Play() End Sub
// To return a Stream object associated with an embedded // resource, you must prepend the namespace to the original // name of the file in the project. private void btnEmbedded_Click(object sender, System.EventArgs e) { Sound sound = new Sound (Assembly.GetExecutingAssembly().GetManifestResourceStream("SoundSample.chimes.wav")); sound.Play(); } private void btnFile_Click(object sender, System.EventArgs e) { Sound sound = new Sound ("Program Files\\SoundSample\\chord.wav"); sound.Play(); }
Compilando o código
Este exemplo requer referências aos seguintes namespaces:
Consulte também
Conceitos
Tópicos "como" do .NET compact estrutura