在嘀嗒声的问题实际上是一个系统范围preference，所以我只希望在我的应用程序具有焦点，然后重新启用应用程序时关闭/失去焦点，它被禁止

The 'click sound' in question is actually a system wide preference, so I only want it to be disabled when my application has focus and then re-enable when the application closes/loses focus.

本来，我想问这个问题，在这里计算器，但我还没有在公测。因此，谷歌搜索的答案，找到的信息只有一点点就可以了后，我想出了以下，并决定将它张贴在这里，现在我在测试阶段。

Originally, I wanted to ask this question here on stackoverflow, but I was not yet in the beta. So, after googling for the answer and finding only a little bit of information on it I came up with the following and decided to post it here now that I'm in the beta.

using System;
using Microsoft.Win32;

namespace HowTo
{
    class WebClickSound
    {
        /// <summary>
        /// Enables or disables the web browser navigating click sound.
        /// </summary>
        public static bool Enabled
        {
            get
            {
                RegistryKey key = Registry.CurrentUser.OpenSubKey(@"AppEventsSchemesAppsExplorerNavigating.Current");
                string keyValue = (string)key.GetValue(null);
                return String.IsNullOrEmpty(keyValue) == false && keyValue != """";
            }
            set
            {
                string keyValue;

                if (value)
                {
                    keyValue = "%SystemRoot%\Media\";
                    if (Environment.OSVersion.Version.Major == 5 && Environment.OSVersion.Version.Minor > 0)
                    {
                        // XP
                        keyValue += "Windows XP Start.wav";
                    }
                    else if (Environment.OSVersion.Version.Major == 6)
                    {
                        // Vista
                        keyValue += "Windows Navigation Start.wav";
                    }
                    else
                    {
                        // Don't know the file name so I won't be able to re-enable it
                        return;
                    }
                }
                else
                {
                    keyValue = """";
                }

                // Open and set the key that points to the file
                RegistryKey key = Registry.CurrentUser.OpenSubKey(@"AppEventsSchemesAppsExplorerNavigating.Current", true);
                key.SetValue(null, keyValue,  RegistryValueKind.ExpandString);
                isEnabled = value;
            }
        }
    }
}

然后在主窗体，我们用上面的code在这3个事件：

Then in the main form we use the above code in these 3 events:

的FormClosing Activated Deactivated

FormClosing

private void Form1_Activated(object sender, EventArgs e)
{
    // Disable the sound when the program has focus
    WebClickSound.Enabled = false;
}


private void Form1_Deactivate(object sender, EventArgs e)
{
    // Enable the sound when the program is out of focus
    WebClickSound.Enabled = true;
}


private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
    // Enable the sound on app exit
    WebClickSound.Enabled = true;
}

在一个问题，目前我看到的是，如果程序崩溃，他们不会有咔嗒声，直到他们重新启动我的应用程序，但他们不知道这样做。

The one problem I see currently is if the program crashes they won't have the click sound until they re-launch my application, but they wouldn't know to do that.

你们有什么感想？这是一个很好的解决方案？有什么可以改进的？

What do you guys think? Is this a good solution? What improvements can be made?

推荐答案

我已经注意到，如果你使用WebBrowser.Document.Write而不是WebBrowser.DocumentText然后点击声音不会发生。

I've noticed that if you use WebBrowser.Document.Write rather than WebBrowser.DocumentText then the click sound doesn't happen.

所以：

webBrowser1.DocumentText = "<h1>Hello, world!</h1>";

试试这个：

webBrowser1.Document.OpenNew(true);
webBrowser1.Document.Write("<h1>Hello, world!</h1>");