C# 如何以编程方式设置系统音量？
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原文地址: http://stackoverflow.com/questions/13139181/
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How to programmatically set the system volume?
提问by Paedow
How can I change the Windows System Sound Volume using a C# Application?
如何使用 C# 应用程序更改 Windows 系统音量？
采纳答案by Vman
I'm a bit late to the party but if you are looking now there's a nuget package available (AudioSwitcher.AudioApi.CoreAudio) that simplifies audio interactions. Install it then it's as simple as:
我参加聚会有点晚了，但如果您现在正在寻找，有一个 nuget 包可用（AudioSwitcher.AudioApi.CoreAudio）可以简化音频交互。安装它，然后就像这样简单：
CoreAudioDevice defaultPlaybackDevice = new CoreAudioController().DefaultPlaybackDevice;
Debug.WriteLine("Current Volume:" + defaultPlaybackDevice.Volume);
defaultPlaybackDevice.Volume = 80;
回答by Caster Troy
If the tutorials provided in the other answers are too involved you could try an implementation like this using the keybd_event function
如果其他答案中提供的教程过于复杂，您可以使用keybd_event 函数尝试这样的实现
[DllImport("user32.dll")]
static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, int dwExtraInfo);
Usage:
用法：
keybd_event((byte)Keys.VolumeUp, 0, 0, 0); // increase volume
keybd_event((byte)Keys.VolumeDown, 0, 0, 0); // decrease volume
回答by Paedow
Here is the code:
这是代码：
using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace Test
{
public class Test
{
private const int APPCOMMAND_VOLUME_MUTE = 0x80000;
private const int APPCOMMAND_VOLUME_UP = 0xA0000;
private const int APPCOMMAND_VOLUME_DOWN = 0x90000;
private const int WM_APPCOMMAND = 0x319;
[DllImport("user32.dll")]
public static extern IntPtr SendMessageW(IntPtr hWnd, int Msg,
IntPtr wParam, IntPtr lParam);
private void Mute()
{
SendMessageW(this.Handle, WM_APPCOMMAND, this.Handle,
(IntPtr)APPCOMMAND_VOLUME_MUTE);
}
private void VolDown()
{
SendMessageW(this.Handle, WM_APPCOMMAND, this.Handle,
(IntPtr)APPCOMMAND_VOLUME_DOWN);
}
private void VolUp()
{
SendMessageW(this.Handle, WM_APPCOMMAND, this.Handle,
(IntPtr)APPCOMMAND_VOLUME_UP);
}
}
}
Found on dotnetcurry
When using WPF you need to use new WindowInteropHelper(this).Handleinstead of this.Handle(thanks Alex Beals)
使用 WPF 时，您需要使用new WindowInteropHelper(this).Handle而不是this.Handle（感谢 Alex Beals）
回答by egfconnor
In case you wish to set it to an exact value using the Core Audio APIs:
如果您希望使用 Core Audio API 将其设置为精确值：
using CoreAudioApi;
public class SystemVolumeConfigurator
{
private readonly MMDeviceEnumerator _deviceEnumerator = new MMDeviceEnumerator();
private readonly MMDevice _playbackDevice;
public SystemVolumeConfigurator()
{
_playbackDevice = _deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia);
}
public int GetVolume()
{
return (int)(_playbackDevice.AudioEndpointVolume.MasterVolumeLevelScalar * 100);
}
public void SetVolume(int volumeLevel)
{
if (volumeLevel < 0 || volumeLevel > 100)
throw new ArgumentException("Volume must be between 0 and 100!");
_playbackDevice.AudioEndpointVolume.MasterVolumeLevelScalar = volumeLevel / 100.0f;
}
}
回答by baruchno
My code is a bit different but still using CoreAudio
我的代码有点不同，但仍在使用 CoreAudio
downloaded the pkg : nuget install AudioSwitcher.AudioApi.CoreAudio -Version 3.0.0.1
下载了 pkg：nuget install AudioSwitcher.AudioApi.CoreAudio -Version 3.0.0.1
using AudioSwitcher.AudioApi.CoreAudio;
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
CoreAudioDevice defaultPlaybackDevice = new CoreAudioController().DefaultPlaybackDevice;
double vol = defaultPlaybackDevice.Volume;
defaultPlaybackDevice.Volume = defaultPlaybackDevice.Volume - 5.0;
defaultPlaybackDevice.Volume = defaultPlaybackDevice.Volume + 5.0;
}
}
