如何使用C#应用程序更改Windows系统音量?
答案 0 :(得分:61)
我参加派对有点晚了,但如果你现在正在寻找可用的nuget包(AudioSwitcher.AudioApi.CoreAudio),它可以简化音频交互。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;
答案 1 :(得分:47)
以下是代码:
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);
}
}
}
上找到
使用WPF时,您需要使用new WindowInteropHelper(this).Handle
代替this.Handle
(感谢Alex Beals)
答案 2 :(得分:12)
如果其他答案中提供的教程过于复杂,您可以使用keybd_event function
尝试这样的实现[DllImport("user32.dll")]
static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, int dwExtraInfo);
<强>用法:强>
keybd_event((byte)Keys.VolumeUp, 0, 0, 0); // increase volume
keybd_event((byte)Keys.VolumeDown, 0, 0, 0); // decrease volume
答案 3 :(得分:10)
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;
}
}
答案 4 :(得分:0)
我的代码有些不同,但仍使用CoreAudio
下载了pkg: nuget安装AudioSwitcher.AudioApi.CoreAudio -Version 3.0.0.1
import {createStackNavigator} from 'react-navigation';
const RootStack = createStackNavigator(
{
Home: {
screen: Home,
},
Land: {
screen: On,
},
Find: {
screen: Find
}
},
{
initialRouteName: 'Home',
}
);
export default class App extends Component {
constructor(props) {
super(props);
this.state = {
timePassed: false,
On: true,
};
}
render() {
return (
<View style={styles.container}>
<StatusBar backgroundColor='#F2C490' translucent={true} barStyle='light-content'/><RootStack/>
</View>
);
}
}
}
答案 5 :(得分:0)
您可以将此库https://gist.github.com/sverrirs/d099b34b7f72bb4fb386添加到您的项目中,并像这样更改音量;
VideoPlayerController.AudioManager.SetMasterVolume(100);
该库还包含用于更改应用程序音量,静音,获取当前音量级别等的选项。 该名称空间称为“视频播放器控制器”,但是我在Windows Forms App中使用了它来更改系统音量,并且可以正常工作,因此“视频”部分是任意的。