如何使用 C Sharp 中的 WebBrowser 元素禁用 Click Sound？答案

【问题标题】：How to disable Click Sound using a WebBrowser element in C Sharp?如何使用 C Sharp 中的 WebBrowser 元素禁用 Click Sound？
【发布时间】：2009-11-12 09:07:40
【问题描述】：

我有一个事件被触发时这样做：

htmlView.DocumentText = contentArea.Text;

问题是这个事件被触发了很多，我得到那个烦人的 IE “点击噪音”。我已经看到了一个解决方案 HowTo Disable WebBrowser 'Click Sound' in your app only 和另一个，但我对 C Sharp 很陌生（只使用了几个小时），我不确定是什么：

private const int FEATURE_DISABLE_NAVIGATION_SOUNDS = 21;
private const int SET_FEATURE_ON_THREAD = 0x00000001;
private const int SET_FEATURE_ON_PROCESS = 0x00000002;
private const int SET_FEATURE_IN_REGISTRY = 0x00000004;
private const int SET_FEATURE_ON_THREAD_LOCALMACHINE = 0x00000008;
private const int SET_FEATURE_ON_THREAD_INTRANET = 0x00000010;
private const int SET_FEATURE_ON_THREAD_TRUSTED = 0x00000020;
private const int SET_FEATURE_ON_THREAD_INTERNET = 0x00000040;
private const int SET_FEATURE_ON_THREAD_RESTRICTED = 0x00000080;

...

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

...意思是。我把那个代码放在哪里？抱歉，我是 C Sharp 和 Visual Studio 的菜鸟，希望新手能够理解的帮助。

谢谢！

【问题讨论】：

标签： c# audio

【解决方案1】：

您可以将它放在一个静态类中，或者将CoInternetSetFeatureEnabled 方法公开，或者在必要时添加一个额外的桥接方法，在将参数从更可用的形式转换后调用它。例如，在第一种情况下，它将是：

public static class UnmanagedCode
{
    private const int FEATURE_DISABLE_NAVIGATION_SOUNDS = 21;
    //etc...

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

【讨论】：

嘿，我在我的代码中使用了这个方法。它给出了一个错误提示“尝试访问该方法失败”

【解决方案2】：

谢谢Konamiman！

这是我的最终代码：

public static class UnmanagedCode
    {
        private const int FEATURE_DISABLE_NAVIGATION_SOUNDS = 21;
        private const int SET_FEATURE_ON_THREAD = 0x00000001;
        private const int SET_FEATURE_ON_PROCESS = 0x00000002;
        private const int SET_FEATURE_IN_REGISTRY = 0x00000004;
        private const int SET_FEATURE_ON_THREAD_LOCALMACHINE = 0x00000008;
        private const int SET_FEATURE_ON_THREAD_INTRANET = 0x00000010;
        private const int SET_FEATURE_ON_THREAD_TRUSTED = 0x00000020;
        private const int SET_FEATURE_ON_THREAD_INTERNET = 0x00000040;
        private const int SET_FEATURE_ON_THREAD_RESTRICTED = 0x00000080;

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

        public static int disableSound()
        {
            UnmanagedCode.CoInternetSetFeatureEnabled(FEATURE_DISABLE_NAVIGATION_SOUNDS, SET_FEATURE_ON_THREAD, true);
            UnmanagedCode.CoInternetSetFeatureEnabled(FEATURE_DISABLE_NAVIGATION_SOUNDS, SET_FEATURE_ON_PROCESS, true);
            UnmanagedCode.CoInternetSetFeatureEnabled(FEATURE_DISABLE_NAVIGATION_SOUNDS, SET_FEATURE_IN_REGISTRY, true);
            UnmanagedCode.CoInternetSetFeatureEnabled(FEATURE_DISABLE_NAVIGATION_SOUNDS, SET_FEATURE_ON_THREAD_LOCALMACHINE, true);
            UnmanagedCode.CoInternetSetFeatureEnabled(FEATURE_DISABLE_NAVIGATION_SOUNDS, SET_FEATURE_ON_THREAD_INTRANET, true);
            UnmanagedCode.CoInternetSetFeatureEnabled(FEATURE_DISABLE_NAVIGATION_SOUNDS, SET_FEATURE_ON_THREAD_TRUSTED, true);
            UnmanagedCode.CoInternetSetFeatureEnabled(FEATURE_DISABLE_NAVIGATION_SOUNDS, SET_FEATURE_ON_THREAD_INTERNET, true);
            UnmanagedCode.CoInternetSetFeatureEnabled(FEATURE_DISABLE_NAVIGATION_SOUNDS, SET_FEATURE_ON_THREAD_RESTRICTED, true);

            return 1;
        }
    }
 static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {

            UnmanagedCode.disableSound();
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }

【讨论】：

很高兴能帮上忙。还要注意一点：如果你不直接从 UnmanagedCode 类外部调用他的 CoInternetSetFeatureEnabled 方法，最好将其标记为私有。