如何在c#中获得默认浏览器的图标

本文关键字：默认浏览器 图标 | 更新日期: 2023-09-27 18:16:13

我有一个按钮，说"在浏览器中打开"。我想把它重命名为"打开"，并在它旁边显示默认浏览器的图标。

如果默认浏览器是firefox，那么我希望firefox图标在我的按钮。如果默认浏览器是chrome，那么我想要chrome图标。

如何获得默认浏览器图标?

如果每个版本的windows都不同，那么我需要windows 7版本

如何在c#中获得默认浏览器的图标

在应用程序中嵌入一个空白的htm或html文件(或创建它)

然后调用图标。

它将返回默认的浏览器图标

我已经更改了代码，这是我的版本。

using System;
using Microsoft.Win32;
using System.Drawing;
namespace Namespace
{
public static class DefaultSystemBrowser
{
    private static bool initialized = false;
    private static string path = null;
    public static string Path
    {
        get 
        {
            CheckForErrors();
            return path;
        }
    }
    public static Icon Icon
    {
        get {
            CheckForErrors();
            return Icon.ExtractAssociatedIcon( path );
        }
    }
    public static Bitmap Bitmap
    {
        get
        {
            CheckForErrors();
            return Icon.ExtractAssociatedIcon( path ).ToBitmap();
        }
    }
    private static void CheckForErrors()
    {
        if ( !initialized )
            throw new InvalidOperationException( "You can't use DefaultSystemBrowser class before you call Determine()." );
        if ( ErrorMessage != null )
            throw new InvalidOperationException( "You can't use DefaultSystemBrowser class if call to Determine() resulted in error." );
    }
    /// <summary>
    /// Null if no error occured, error description otherwise.
    /// </summary>
    public static string ErrorMessage
    {
        get;
        private set;
    }
    /// <summary>
    /// Finds out all information about current default browser. You can call this method every time you want to find out default browser.
    /// </summary>
    public static void Determine()
    {
        path = String.Empty;
        initialized = true;
        RegistryKey regKey = null;
        ErrorMessage = null;
        try
        {
            //set the registry key we want to open
            regKey = Registry.ClassesRoot.OpenSubKey( "HTTP''shell''open''command", false );
            //get rid of the enclosing quotes
            path = regKey.GetValue( null ).ToString().ToLower().Replace( "" + (char) 34, "" );
            //check to see if the value ends with .exe (this way we can remove any command line arguments)
            if ( !path.EndsWith( "exe" ) )
                //get rid of all command line arguments (anything after the .exe must go)
                path = path.Substring( 0, path.LastIndexOf( ".exe" ) + 4 );
            initialized = true;
        }
        catch ( Exception ex )
        {
            ErrorMessage = string.Format( "ERROR: An exception of type: {0} occurred in method: {1} in the following module: {2}", ex.GetType(), ex.TargetSite, typeof( DefaultSystemBrowser ) );
        }
        finally
        {
            //check and see if the key is still open, if so
            //then close it
            if ( regKey != null )
                regKey.Close();
        }
    }
}
}

我是这样使用代码的:

        DefaultSystemBrowser.Determine();
        if ( DefaultSystemBrowser.ErrorMessage == null )
        {
            btnOpenInBrowser.Image = DefaultSystemBrowser.Bitmap;
        }
        else
        {
            btnOpenInBrowser.Image = Properties.Resources.firefox_24_noshadow;
        }
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