你如何以编程方式获取计算机录音设备的列表？

Question

我试图以编程方式获取计算机记录设备的列表，然后更改默认设置，我已设法使用以下代码中的播放设备执行此操作，但我想使用录制设备执行此操作。

这是以下代码返回的设备列表：

这些是我想要查看和更改的设备：

class Program
{
    static void Main(string[] args)
    {
        MMDeviceEnumerator DevEnum = new MMDeviceEnumerator();
        MMDeviceCollection devices = DevEnum.EnumerateAudioEndPoints(EDataFlow.eRender, EDeviceState.DEVICE_STATE_ACTIVE);
        MMDevice DefaultDevice = DevEnum.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia);
        MMDevice SecondaryDevice = null;
        PolicyConfigClient client = new PolicyConfigClient();

        Console.WriteLine("-----------------------------------");
        Console.WriteLine("List of devices");
        Console.WriteLine("-----------------------------------");
        for (int i = 1; i < devices.Count; i++)
        { 
            if (devices[i].ID != DefaultDevice.ID)
            {
                SecondaryDevice = devices[i];
            }
            Console.WriteLine(devices[i].FriendlyName);
            Console.ReadLine();
        }

        Console.WriteLine("Default Device");
        Console.WriteLine("-----------------------------------");
        Console.WriteLine(DefaultDevice.FriendlyName);
        Console.ReadLine();

        Console.WriteLine("Secondary Device");
        Console.WriteLine("-----------------------------------");
        Console.WriteLine(SecondaryDevice.FriendlyName);
        Console.ReadLine();


        client.SetDefaultEndpoint(SecondaryDevice.ID, ERole.eCommunications);
        client.SetDefaultEndpoint(SecondaryDevice.ID, ERole.eMultimedia);
        client.SetDefaultEndpoint(SecondaryDevice.ID, ERole.eConsole);

        DefaultDevice = DevEnum.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia);

        Console.WriteLine("New Default Device");
        Console.WriteLine("-----------------------------------");
        Console.WriteLine(DefaultDevice.FriendlyName);
        Console.ReadLine();
    }
}

Answer 1

这样做的方法是在评论中提到的Chetan Ranpariya，并且使用EDataFlow.eCapture代替EDataFlow.eRender，下面是修改后的工作代码：

class Program
{
    static void Main(string[] args)
    {
        MMDeviceEnumerator DevEnum = new MMDeviceEnumerator();
        MMDeviceCollection devices = DevEnum.EnumerateAudioEndPoints(EDataFlow.eCapture, EDeviceState.DEVICE_STATE_ACTIVE);
        MMDevice DefaultDevice = DevEnum.GetDefaultAudioEndpoint(EDataFlow.eCapture, ERole.eMultimedia);
        MMDevice SecondaryDevice = null;
        PolicyConfigClient client = new PolicyConfigClient();

        Console.WriteLine("-----------------------------------");
        Console.WriteLine("List of sound cards installed");
        Console.WriteLine("-----------------------------------");
        for (int i = 0; i < devices.Count; i++)
        { 
            if (devices[i].ID != DefaultDevice.ID)
            {
                SecondaryDevice = devices[i];
            }
            Console.WriteLine(devices[i].FriendlyName);
            Console.ReadLine();
        }

        Console.WriteLine("Default Device");
        Console.WriteLine("-----------------------------------");
        Console.WriteLine(DefaultDevice.FriendlyName);
        Console.ReadLine();

        Console.WriteLine("Secondary Device");
        Console.WriteLine("-----------------------------------");
        Console.WriteLine(SecondaryDevice.FriendlyName);
        Console.ReadLine();


        client.SetDefaultEndpoint(SecondaryDevice.ID, ERole.eCommunications);
        client.SetDefaultEndpoint(SecondaryDevice.ID, ERole.eMultimedia);
        client.SetDefaultEndpoint(SecondaryDevice.ID, ERole.eConsole);

        DefaultDevice = DevEnum.GetDefaultAudioEndpoint(EDataFlow.eCapture, ERole.eMultimedia);

        Console.WriteLine("New Default Device");
        Console.WriteLine("-----------------------------------");
        Console.WriteLine(DefaultDevice.FriendlyName);
        Console.ReadLine();
    }
}