我想使用C#代码获得Linux的系统容量。怎么做?
额外信息:
->是否可以使用任何库/ dll。
->我遇到过alsa-sharp,但没有发现任何有关音量的功能。
->我遇到过C代码,但是我对如何在C#中使用它不熟悉。
迟到总比没有好,但是我在设置基于RPi的网络广播和以下代码时遇到了这个问题,您也可以找到at this git对我有用:
using System;
using System.Runtime.InteropServices;
namespace Alsa
{
public sealed class VolumeControl : IDisposable
{
private readonly long _min;
private readonly long _max;
private readonly IntPtr _sid;
private readonly IntPtr _selem;
private readonly IntPtr _handle;
private const string LibraryName = "libasound";
public VolumeControl(string card = "default", string selemName = "PCM")
{
snd_mixer_open(ref _handle, 0);
snd_mixer_attach(_handle, card);
snd_mixer_selem_register(_handle, default, default);
snd_mixer_load(_handle);
snd_mixer_selem_id_malloc(ref _sid);
snd_mixer_selem_id_set_index(_sid, 0);
snd_mixer_selem_id_set_name(_sid, selemName);
_selem = snd_mixer_find_selem(_handle, _sid);
snd_mixer_selem_get_playback_volume_range(_selem, ref _min, ref _max);
}
public void SetVolumePercent(int volume)
{
snd_mixer_selem_set_playback_volume_all(_selem, (int)(volume * _max / 100));
}
public void Dispose()
{
ReleaseUnmanagedResources();
GC.SuppressFinalize(this);
}
private void ReleaseUnmanagedResources()
{
snd_mixer_selem_id_free(_sid);
snd_mixer_close(_handle);
}
~AlsaSoundOutput()
{
ReleaseUnmanagedResources();
}
[DllImport(LibraryName)]
internal static extern int snd_mixer_open(ref IntPtr mixer, int mode);
[DllImport(LibraryName, CharSet = CharSet.Ansi)]
internal static extern int snd_mixer_attach(IntPtr mixer, [MarshalAs(UnmanagedType.LPStr)] string name);
[DllImport(LibraryName)]
internal static extern int snd_mixer_selem_register(IntPtr mixer, IntPtr options, IntPtr classp);
[DllImport(LibraryName)]
internal static extern int snd_mixer_load(IntPtr mixer);
[DllImport(LibraryName)]
internal static extern int snd_mixer_selem_id_malloc(ref IntPtr selem);
[DllImport(LibraryName)]
internal static extern void snd_mixer_selem_id_set_index(IntPtr selem, uint val);
[DllImport(LibraryName, CharSet = CharSet.Ansi)]
internal static extern void snd_mixer_selem_id_set_name(IntPtr selem, [MarshalAs(UnmanagedType.LPStr)] string value);
[DllImport(LibraryName)]
internal static extern IntPtr snd_mixer_find_selem(IntPtr mixer, IntPtr selem);
[DllImport(LibraryName)]
internal static extern int snd_mixer_selem_get_playback_volume_range(IntPtr selem, ref long min, ref long max);
[DllImport(LibraryName)]
internal static extern int snd_mixer_selem_set_playback_volume_all(IntPtr selem, int value);
[DllImport(LibraryName)]
internal static extern void snd_mixer_selem_id_free(IntPtr selem);
[DllImport(LibraryName)]
internal static extern int snd_mixer_close(IntPtr mixer);
}
}