C# (CSharp) WinAPI.BY_HANDLE_FILE_INFORMATIONの例

コード例 #1

ファイル: 111213-1866788-3742651-2.cs プロジェクト: shendongnian/code

    public ulong ApproachB()
    {
        WinAPI.BY_HANDLE_FILE_INFORMATION objectFileInfo = new WinAPI.BY_HANDLE_FILE_INFORMATION();

        FileInfo   fi = new FileInfo(@"C:\Temp\testfile.txt");
        FileStream fs = fi.Open(FileMode.Open, FileAccess.Read, FileShare.ReadWrite);

        WinAPI.GetFileInformationByHandle(fs.Handle, out objectFileInfo);
        fs.Close();
        ulong fileIndex = ((ulong)objectFileInfo.FileIndexHigh << 32) + (ulong)objectFileInfo.FileIndexLow;

        return(fileIndex);
    }

コード例 #2

    /// <summary>
    /// 获取文件的唯一标识
    /// </summary>
    /// <param name="fileName"></param>
    /// <returns></returns>
    public static ulong GetUnipueFileID(string fileName)
    {
        if (File.Exists(fileName) == false)
        {
            return(0);
        }
        WinAPI.BY_HANDLE_FILE_INFORMATION objectFileInfo = new WinAPI.BY_HANDLE_FILE_INFORMATION();

        FileInfo   fi = new FileInfo(fileName);
        FileStream fs = fi.Open(FileMode.Open, FileAccess.Read, FileShare.ReadWrite);

        WinAPI.GetFileInformationByHandle(fs.Handle, out objectFileInfo);

        fs.Close();

        ulong fileIndex = ((ulong)objectFileInfo.FileIndexHigh << 32) + (ulong)objectFileInfo.FileIndexLow;

        return(fileIndex);
    }