在 C# 中的 Windows x64 上删除文件到回收站

Question

我的这个类似乎在非 64 位上运行得很好。

using System;
using System.Runtime.InteropServices;

namespace DeleteToRecycleBin
{
/// <summary>
/// Send files directly to the recycle bin.
/// </summary>
public class RecybleBin
{

    /// <summary>
    /// Possible flags for the SHFileOperation method.
    /// </summary>
    [Flags]
    public enum FileOperationFlags: ushort 
    {
        /// <summary>
        /// Do not show a dialog during the process
        /// </summary>
        FOF_SILENT =                0x0004,
        /// <summary>
        /// Do not ask the user to confirm selection
        /// </summary>
        FOF_NOCONFIRMATION =        0x0010,
        /// <summary>
        /// Delete the file to the recycle bin.  (Required flag to send a file to the bin
        /// </summary>
        FOF_ALLOWUNDO =             0x0040,
        /// <summary>
        /// Do not show the names of the files or folders that are being recycled.
        /// </summary>
        FOF_SIMPLEPROGRESS =        0x0100,
        /// <summary>
        /// Surpress errors, if any occur during the process.
        /// </summary>
        FOF_NOERRORUI =             0x0400,
        /// <summary>
        /// Warn if files are too big to fit in the recycle bin and will need
        /// to be deleted completely.
        /// </summary>
        FOF_WANTNUKEWARNING =       0x4000,
    }

    /// <summary>
    /// File Operation Function Type for SHFileOperation
    /// </summary>
    public enum FileOperationType: uint
    {
        /// <summary>
        /// Move the objects
        /// </summary>
        FO_MOVE =                   0x0001,
        /// <summary>
        /// Copy the objects
        /// </summary>
        FO_COPY =                   0x0002,
        /// <summary>
        /// Delete (or recycle) the objects
        /// </summary>
        FO_DELETE =                 0x0003,
        /// <summary>
        /// Rename the object(s)
        /// </summary>
        FO_RENAME =                 0x0004,
    }



    /// <summary>
    /// SHFILEOPSTRUCT for SHFileOperation from COM
    /// </summary>
    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto, Pack = 1)]
    private struct SHFILEOPSTRUCT
    {

        public IntPtr hwnd;
        [MarshalAs(UnmanagedType.U4)]
        public FileOperationType wFunc;
        public string pFrom;
        public string pTo;
        public FileOperationFlags fFlags;
        [MarshalAs(UnmanagedType.Bool)]
        public readonly bool fAnyOperationsAborted;
        public readonly IntPtr hNameMappings;
        public readonly string lpszProgressTitle;
    }

    [DllImport("shell32.dll", CharSet = CharSet.Auto)]
    private static extern int SHFileOperation(ref SHFILEOPSTRUCT FileOp);

    /// <summary>
    /// Send file to recycle bin
    /// </summary>
    /// <param name="path">Location of directory or file to recycle</param>
    /// <param name="flags">FileOperationFlags to add in addition to FOF_ALLOWUNDO</param>
    public static bool Send(string path, FileOperationFlags flags)
    {
        try
        {
            SHFILEOPSTRUCT fs = new SHFILEOPSTRUCT
                                    {
                                        wFunc = FileOperationType.FO_DELETE,
                                        pFrom = path + '\0' + '\0',
                                        fFlags = FileOperationFlags.FOF_ALLOWUNDO | flags
                                    };

            // important to double-terminate the string.
            SHFileOperation(ref fs);
            return true;
        }
        catch (Exception)
        {
            return false;
        }
    }

    /// <summary>
    /// Send file to recycle bin.  Display dialog, display warning if files are too big to fit (FOF_WANTNUKEWARNING)
    /// </summary>
    /// <param name="path">Location of directory or file to recycle</param>
    public static bool Send(string path) {
        return Send(path, FileOperationFlags.FOF_NOCONFIRMATION | FileOperationFlags.FOF_WANTNUKEWARNING);
    }

    /// <summary>
    /// Send file silently to recycle bin.  Surpress dialog, surpress errors, delete if too large.
    /// </summary>
    /// <param name="path">Location of directory or file to recycle</param>
    public static bool SendSilent(string path)
    {
        return Send(path, FileOperationFlags.FOF_NOCONFIRMATION | FileOperationFlags.FOF_NOERRORUI | FileOperationFlags.FOF_SILENT);

    }
}

有

什么方法可以修复它，使其在 x64 上也能正常工作吗？我尝试将 ushort 更改为 ulong 以及其他一些修改，但它不起作用。

我知道还有其他解决方案需要引用 Microsoft.VisualBasic 但我更喜欢 p/invoke 方式。

正确答案是：

在 x64 下，必须在没有 Pack = 1 参数的情况下声明 SHFILEOPSTRUCT，否则将会失败。如果您希望代码独立于平台，这将是一个真正的痛苦，因为您必须声明两个独立的结构，一个带有 Pack = 1，另一个没有。然后，您必须声明两个不同的 SHFileOperation 调用，每个结构调用一个。然后，您必须根据您运行的是 32 位还是 64 位来决定调用哪一个。

Answer 1

看起来很奇怪，.NET 已经具有删除到回收站的函数...但它们位于 Microsoft.VisualBasic 命名空间中。具体来说，是Microsoft.VisualBasic.FileIO。

using Microsoft.VisualBasic.FileIO;

// class declaration, method start here

// Send file to recycle bin without dialog
FileSystem.DeleteFile("pathToFile", UIOption.OnlyErrorDialogs, RecycleOption.SendToRecycleBin);

// Send file to recycle bin without dialog
FileSystem.DeleteFile("pathToFile", UIOption.AllDialogs, RecycleOption.SendToRecycleBin);

// Directories are the same, but with DeleteDirectory instead

Answer 2

您是否查看过 PInvoke 站点？它对 FILEOPSTRUCT 类型的定义略有不同，一方面强制使用 Unicode。我想知道 charset = auto 是否令人困惑......就像它在 32 位上默认为 ANSI，但在 64 位上默认为 Unicode 并且中间某个地方出了问题。

编辑;
另外，Visual Basic 参考方法是一种简单的方法...我知道人们出于某种原因讨厌它，但相关的 DLL 仍然是核心框架的一部分，因此您不会添加任何新的依赖项。