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■ Parallel 클래스 : For 정적 메소드를 사용해 디렉토리 크기 구하기 예제

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using System;

long directorySize = GetDirectorySize("c:\\temp", true);

Console.WriteLine("디렉토리 크기 : {0:n0} 바이트", directorySize);

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■ Parallel 클래스 : For 정적 메소드를 사용해 디렉토리 크기 구하기

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using System.IO;

using System.Threading;

using System.Threading.Tasks;

#region 디렉토리 크기 구하기 - GetDirectorySize(directoryPath, searchAllDirectory)

/// <summary>

/// 디렉토리 크기 구하기

/// </summary>

/// <param name="directoryPath">디렉토리 경로</param>

/// <param name="searchAllDirectory">모든 디렉토리 검색 여부</param>

/// <returns>디렉토리 크기</returns>

public long GetDirectorySize(string directoryPath, bool searchAllDirectory)

{

    long directorySize = 0L;

    string[] filePathArray = Directory.GetFiles(directoryPath);

    foreach(string filePath in filePathArray)

    {

        Interlocked.Add(ref directorySize, new FileInfo(filePath).Length);

    }

    if(searchAllDirectory)

    {

        string[] childDirectoryPathArray = Directory.GetDirectories(directoryPath);

        Parallel.For<long>

        (

            0,

            childDirectoryPathArray.Length,

            () => 0, (i, loop, childDirectorySize) =>

            {

                if((File.GetAttributes(childDirectoryPathArray[i]) & FileAttributes.ReparsePoint) != FileAttributes.ReparsePoint)

                {

                    childDirectorySize += GetDirectorySize(childDirectoryPathArray[i], true);

                return childDirectorySize;

                }

                return 0;

            },

            (x) => Interlocked.Add(ref directorySize, x)

        );

    }

    return directorySize;

}

#endregion

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