使用單個Windows提示符洗掉多個檔案(FileSystem)

我有一個顯示檔案夾中檔案的 WPF 應用程式。用戶可以選擇多個檔案并選擇洗掉它們，目前我正在將此邏輯與 VisualBasic.FileIO 庫中的檔案系統一起使用：

foreach (Item item in items)
{
     if (item.IsDirectory)
     {
          FileSystem.DeleteDirectory(item.FullPath, UIOption.AllDialogs, RecycleOption.SendToRecycleBin);
     }
     else
     {
          FileSystem.DeleteFile(item.FullPath, UIOption.AllDialogs, RecycleOption.SendToRecycleBin);
     }
} 

這里的問題是，如果用戶打開了 Windows 選項“顯示洗掉確認對話框”：

他們得到每個檔案的 Windows 提示。

我希望他們得到一個像這樣的提示：

有沒有辦法做到這一點？

即使它涉及某些 WinAPI 函式的 PInvoke？

uj5u.com熱心網友回復：

使用 PInvoke，我們可以使用SHFileOperation和FO_DELETE函式將檔案系統物件發送到回收站。根據檔案，我們可以通過使用 NULL 字符連接多個路徑來一次發送多個路徑：

盡管此成員被宣告為單個以空字符結尾的字串，但它實際上是一個可以保存多個以空字符分隔的檔案名的緩沖區。每個檔案名都以單個 NULL 字符結尾。最后一個檔案名以雙 NULL 字符 ("\0\0") 結束，表示緩沖區結束。

讓我們不要從頭開始撰寫所有內容，而是使用此答案中的部分代碼并對其進行調整以使用多個路徑。我們會有這樣的東西：

public class FileOperationAPIWrapper
{
    /// <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)]
    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 bool fAnyOperationsAborted;
        public IntPtr hNameMappings;
        public string lpszProgressTitle;
    }

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

    public static bool SendToRecycleBin(string path, FileOperationFlags flags)
    {
        return SendToRecycleBin(new[] { path }, flags);
    }

    public static bool SendToRecycleBin(IList<string> paths, FileOperationFlags flags)
    {
        try
        {
            var fs = new SHFILEOPSTRUCT
            {
                wFunc = FileOperationType.FO_DELETE,
                pFrom = string.Join("\0", paths)   '\0'   '\0',
                fFlags = FileOperationFlags.FOF_ALLOWUNDO | flags
            };
            SHFileOperation(ref fs);
            return true;
        }
        catch (Exception)
        {
            return false;
        }
    }
}

用法：

FileOperationAPIWrapper.SendToRecycleBin(items,
    FileOperationAPIWrapper.FileOperationFlags.FOF_WANTNUKEWARNING);

標籤：C＃ wpf

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