69

我编写了一些代码来搜索目录并在列表框中显示文件。

DirectoryInfo dinfo2 = new DirectoryInfo(@"C:\Users\Hunter\Downloads");
FileInfo[] Files2 = dinfo2.GetFiles("*.sto");
foreach (FileInfo file2 in Files2)
{
     listBox1.Items.Add(file2.Name);
}

我什至试过这个：

string path = Environment.SpecialFolder.UserProfile + @"\Downloads";
DirectoryInfo dinfo2 = new DirectoryInfo(Environment.SpecialFolder.UserProfile + path);
FileInfo[] Files2 = dinfo2.GetFiles("*.sto");
foreach (FileInfo file2 in Files2)
{
     listBox1.Items.Add(file2.Name);
}

我得到一个错误虽然......

好的，它在哪里说Users\Hunter好吧，当人们得到我的软件时，没有猎人的名字......那么我如何让它进入任何用户的下载文件夹？

4

6 回答 6

153

WinAPI 方法SHGetKnownFolderPath是检索特殊文件夹（包括个人文件夹和下载文件夹）路径的唯一正确方法。

还有其他方法可以获得类似的结果，看起来很有希望，但最终在特定系统上会出现完全错误的路径（例如，组合或硬编码路径的部分或滥用旧的注册表项）。我的 CodeProject 文章中说明了其背后的原因，该文章还列出了完整的解决方案。它提供了一个包装类，支持检索所有已知的 94 个特殊文件夹以及更多好东西。

这里有一个简单的例子，我只是粘贴了一个缩短版本的解决方案，只能检索个人特殊文件夹，如下载：

using System;
using System.Runtime.InteropServices;

/// <summary>
/// Class containing methods to retrieve specific file system paths.
/// </summary>
public static class KnownFolders
{
    private static string[] _knownFolderGuids = new string[]
    {
        "{56784854-C6CB-462B-8169-88E350ACB882}", // Contacts
        "{B4BFCC3A-DB2C-424C-B029-7FE99A87C641}", // Desktop
        "{FDD39AD0-238F-46AF-ADB4-6C85480369C7}", // Documents
        "{374DE290-123F-4565-9164-39C4925E467B}", // Downloads
        "{1777F761-68AD-4D8A-87BD-30B759FA33DD}", // Favorites
        "{BFB9D5E0-C6A9-404C-B2B2-AE6DB6AF4968}", // Links
        "{4BD8D571-6D19-48D3-BE97-422220080E43}", // Music
        "{33E28130-4E1E-4676-835A-98395C3BC3BB}", // Pictures
        "{4C5C32FF-BB9D-43B0-B5B4-2D72E54EAAA4}", // SavedGames
        "{7D1D3A04-DEBB-4115-95CF-2F29DA2920DA}", // SavedSearches
        "{18989B1D-99B5-455B-841C-AB7C74E4DDFC}", // Videos
    };

    /// <summary>
    /// Gets the current path to the specified known folder as currently configured. This does
    /// not require the folder to be existent.
    /// </summary>
    /// <param name="knownFolder">The known folder which current path will be returned.</param>
    /// <returns>The default path of the known folder.</returns>
    /// <exception cref="System.Runtime.InteropServices.ExternalException">Thrown if the path
    ///     could not be retrieved.</exception>
    public static string GetPath(KnownFolder knownFolder)
    {
        return GetPath(knownFolder, false);
    }

    /// <summary>
    /// Gets the current path to the specified known folder as currently configured. This does
    /// not require the folder to be existent.
    /// </summary>
    /// <param name="knownFolder">The known folder which current path will be returned.</param>
    /// <param name="defaultUser">Specifies if the paths of the default user (user profile
    ///     template) will be used. This requires administrative rights.</param>
    /// <returns>The default path of the known folder.</returns>
    /// <exception cref="System.Runtime.InteropServices.ExternalException">Thrown if the path
    ///     could not be retrieved.</exception>
    public static string GetPath(KnownFolder knownFolder, bool defaultUser)
    {
        return GetPath(knownFolder, KnownFolderFlags.DontVerify, defaultUser);
    }

    private static string GetPath(KnownFolder knownFolder, KnownFolderFlags flags,
        bool defaultUser)
    {
        int result = SHGetKnownFolderPath(new Guid(_knownFolderGuids[(int)knownFolder]),
            (uint)flags, new IntPtr(defaultUser ? -1 : 0), out IntPtr outPath);
        if (result >= 0)
        {
            string path = Marshal.PtrToStringUni(outPath);
            Marshal.FreeCoTaskMem(outPath);
            return path;
        }
        else
        {
            throw new ExternalException("Unable to retrieve the known folder path. It may not "
                + "be available on this system.", result);
        }
    }

    [DllImport("Shell32.dll")]
    private static extern int SHGetKnownFolderPath(
        [MarshalAs(UnmanagedType.LPStruct)]Guid rfid, uint dwFlags, IntPtr hToken,
        out IntPtr ppszPath);

    [Flags]
    private enum KnownFolderFlags : uint
    {
        SimpleIDList              = 0x00000100,
        NotParentRelative         = 0x00000200,
        DefaultPath               = 0x00000400,
        Init                      = 0x00000800,
        NoAlias                   = 0x00001000,
        DontUnexpand              = 0x00002000,
        DontVerify                = 0x00004000,
        Create                    = 0x00008000,
        NoAppcontainerRedirection = 0x00010000,
        AliasOnly                 = 0x80000000
    }
}

/// <summary>
/// Standard folders registered with the system. These folders are installed with Windows Vista
/// and later operating systems, and a computer will have only folders appropriate to it
/// installed.
/// </summary>
public enum KnownFolder
{
    Contacts,
    Desktop,
    Documents,
    Downloads,
    Favorites,
    Links,
    Music,
    Pictures,
    SavedGames,
    SavedSearches,
    Videos
}

（在上面链接的 CodeProject 文章中可以找到完整注释的版本。）

虽然这只是一面令人讨厌的代码墙，但您必须处理的表面非常简单。这是输出下载文件夹路径的控制台程序示例。

private static void Main()
{
    string downloadsPath = KnownFolders.GetPath(KnownFolder.Downloads);
    Console.WriteLine("Downloads folder path: " + downloadsPath);
    Console.ReadLine();
}

例如，只需使用要查询的路径的文件夹KnownFolders.GetPath()的枚举值调用。KnownFolder

NuGet 包

如果您不想经历所有这些麻烦，只需安装我最近创建的 NuGet 包。这是项目站点，这里是图库链接（请注意，用法不同且经过优化，请参阅项目站点上的“使用”部分以获取更多信息）。

PM> Install-Package Syroot.Windows.IO.KnownFolders

用法：

using System;
using Syroot.Windows.IO;

class Program
{
    static void Main(string[] args)
    {
        string downloadsPath = new KnownFolder(KnownFolderType.Downloads).Path;
        Console.WriteLine("Downloads folder path: " + downloadsPath);
        Console.ReadLine();
    }
}
于 2014-02-22T11:32:21.240 回答
11

最简单的方法是：

Process.Start("shell:Downloads");

如果只需要获取当前用户的下载文件夹路径，可以这样：

我从@PacMani 的代码中提取了它。

 // using Microsoft.Win32;
string GetDownloadFolderPath() 
{
    return Registry.GetValue(@"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders", "{374DE290-123F-4565-9164-39C4925E467B}", String.Empty).ToString();
}
于 2014-03-18T05:56:00.493 回答
5

跨平台版本：

public static string getHomePath()
{
    // Not in .NET 2.0
    // System.Environment.GetFolderPath(Environment.SpecialFolder.UserProfile);
    if (System.Environment.OSVersion.Platform == System.PlatformID.Unix)
        return System.Environment.GetEnvironmentVariable("HOME");

    return System.Environment.ExpandEnvironmentVariables("%HOMEDRIVE%%HOMEPATH%");
}


public static string getDownloadFolderPath()
{
    if (System.Environment.OSVersion.Platform == System.PlatformID.Unix)
    {
        string pathDownload = System.IO.Path.Combine(getHomePath(), "Downloads");
        return pathDownload;
    }

    return System.Convert.ToString(
        Microsoft.Win32.Registry.GetValue(
             @"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders"
            ,"{374DE290-123F-4565-9164-39C4925E467B}"
            ,String.Empty
        )
    );
}
于 2015-09-06T21:39:00.337 回答
1

string download = Environment.GetEnvironmentVariable("USERPROFILE")+@"\"+"Downloads";

于 2014-12-04T19:06:06.820 回答
-1

http://msdn.microsoft.com/en-us//library/system.environment.specialfolder.aspx

有些变量带有一些特殊文件夹的路径。

于 2012-05-19T16:37:42.770 回答
-2

通常，您的软件应具有一个可配置的变量，该变量存储用户的下载文件夹，可由用户分配，并在未设置时提供默认值。您可以将值存储在应用程序配置文件或注册表中。

然后在您的代码中读取存储位置的值。

于 2012-05-19T16:43:33.280 回答