IWMPNetwork：：receivedPackets 属性

[与此页面关联的功能（Windows 媒体播放器 SDK）是旧版功能。 它已被 MediaPlayer 取代。 MediaPlayer 已针对Windows 10和Windows 11进行了优化。 Microsoft 强烈建议新代码尽可能使用 MediaPlayer 而不是 Windows 媒体播放器 SDK。 如果可能，Microsoft 建议重写使用旧 API 的现有代码以使用新 API。]

receivedPackets 属性获取收到的数据包数。

语法

public System.Int32 receivedPackets {get; set;}

Public ReadOnly Property receivedPackets As System.Int32

属性值

一个 System.Int32，表示收到的数据包数。

备注

每次停止并重启播放时，此属性将重置为零。 如果播放暂停，则不会重置值。

示例

以下示例使用 receivedPackets 显示收到的数据包数。 该信息显示在标签中以响应 PlayStateChange 事件。 该示例使用间隔为 1 秒的计时器来更新显示。 AxWMPLib.AxWindowsMediaPlayer 对象由名为 player 的变量表示。

// Add a delegate for the PlayStateChange event.
player.PlayStateChange += new AxWMPLib._WMPOCXEvents_PlayStateChangeEventHandler(player_PlayStateChange);

// Create an event handler for the PlayStateChange event.
private void player_PlayStateChange(object sender, AxWMPLib._WMPOCXEvents_PlayStateChangeEvent e)
{
    // Test whether packets may be arriving.
    switch (e.newState)
    {
        // If WMPPlayState is Stopped, Paused, ScanForward, ScanReverse, Waiting, MediaEnded
        // or Transitioning then stop the timer. 
        case 1: 
        case 2: 
        case 4: 
        case 5: 
        case 7: 
        case 8: 
        case 9: 
            timer.Stop();
            break;

        // If WMPPlayState is Playing or Buffering then set the timer interval and start the timer.
        default:
            timer.Interval = 1000;
            timer.Start();
            break;
    }
}

private void UpdateReceivedPackets(object sender, EventArgs e)
{
    receivedPacketsLabel.Text = ("Packets received: " + player.network.receivedPackets.ToString());
}

' Create an event handler for the PlayStateChange event.
Public Sub player_PlayStateChange(ByVal sender As Object, ByVal e As AxWMPLib._WMPOCXEvents_PlayStateChangeEvent) Handles player.PlayStateChange

    ' Test whether packets may be arriving.
    Select Case e.newState

    ' If WMPPlayState is Stopped, Paused, ScanForward, ScanReverse, Waiting, MediaEnded
    ' or Transitioning then stop the timer. 
        Case 1
        Case 2
        Case 4
        Case 5
        Case 7
        Case 8
        Case 9
            timer.Stop()

        ' If WMPPlayState is Playing or Buffering then set the timer interval and start the timer.
        Case Else
            timer.Interval = 1000
            timer.Start()

    End Select

End Sub

Public Sub UpdateReceivedPackets(ByVal sender As Object, ByVal e As System.EventArgs) Handles timer.Tick

    receivedPacketsLabel.Text = ("Packets received: " + player.network.receivedPackets.ToString())

End Sub

要求

要求	值
版本	Windows 媒体播放器 9 系列或更高版本
命名空间	WMPLib
程序集	Interop.WMPLib.dll (Interop.WMPLib.dll.dll)

另请参阅

IWMPNetwork 接口 (VB 和 C#)