Web浏览器禁用所有音频输出 - 从在线广播到youtube

Question

我的网络浏览器:

XAML:

//...
xmlns:my="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration"
//...
<my:WindowsFormsHost Name="windowsFormsHost"/>

C#背后的代码:

System.Windows.Forms.WebBrowser Browser = new System.Windows.Forms.WebBrowser();
windowsFormsHost.Child = Browser;

我的问题是如何禁用所有音频输出.

我找到了这个:

C#:

private const int Feature = 21; //FEATURE_DISABLE_NAVIGATION_SOUNDS
private const int SetFeatureOnProcess = 0x00000002;

[DllImport("urlmon.dll")]
[PreserveSig]
[return: MarshalAs(UnmanagedType.Error)]
static extern int CoInternetSetFeatureEnabled(int featureEntry,
  [MarshalAs(UnmanagedType.U4)] int dwFlags, 
  bool fEnable);

它很好,但是这段代码只能禁用"咔嗒"声,所以在这种情况下它的那种无用.

我只想从我的应用程序100%静音,没有声音.

我已经读过,在这个webbrowser中,它需要通过Windows Sounds来完成,但我真的不知道我在代码中无法做到这一点.

Answer 1

这是你如何轻松地做到这一点.但不是特定于WebBrowser,而是按照您的要求执行:我只想从我的应用程序100%静音,根本没有声音.

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace WinformsWB
{
    public partial class Form1 : Form
    {
        [DllImport("winmm.dll")]
        public static extern int waveOutGetVolume(IntPtr h, out uint dwVolume);

        [DllImport("winmm.dll")]
        public static extern int waveOutSetVolume(IntPtr h, uint dwVolume);

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // save the current volume
            uint _savedVolume;
            waveOutGetVolume(IntPtr.Zero, out _savedVolume);

            this.FormClosing += delegate 
            {
                // restore the volume upon exit
                waveOutSetVolume(IntPtr.Zero, _savedVolume);
            };

            // mute
            waveOutSetVolume(IntPtr.Zero, 0);
            this.webBrowser1.Navigate("http://youtube.com");
        }
    }
}