.Net常用技巧_目录与文件操作

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

namespace MyTool
{
    public class FileOperator
    {

        /// <summary>
        /// 返回指定目录下所有文件信息
        /// </summary>
        /// <param name="strDirectory">目录字符串</param>
        /// <returns></returns>
        public static List<FileInfo> GetAllFilesInDirectory(string strDirectory)
        {
            List<FileInfo> listFiles = new List<FileInfo>(); //保存所有的文件信息
            DirectoryInfo directory = new DirectoryInfo(strDirectory);
            DirectoryInfo[] directoryArray = directory.GetDirectories();
            FileInfo[] fileInfoArray = directory.GetFiles();
            if (fileInfoArray.Length > 0) listFiles.AddRange(fileInfoArray);
            foreach (DirectoryInfo _directoryInfo in directoryArray)
            {
                DirectoryInfo directoryA = new DirectoryInfo(_directoryInfo.FullName);
                DirectoryInfo[] directoryArrayA = directoryA.GetDirectories();
                FileInfo[] fileInfoArrayA = directoryA.GetFiles();
                if (fileInfoArrayA.Length > 0) listFiles.AddRange(fileInfoArrayA);
                GetAllFilesInDirectory(_directoryInfo.FullName);//递归遍历
            }
            return listFiles;
        }

        /// <summary>
        /// 从一个目录将其内容移动到另一目录
        /// </summary>
        /// <param name="directorySource">源目录</param>
        /// <param name="directoryTarget">目的目录</param>
        public void MoveFolderTo(string directorySource, string directoryTarget)
        {
            //检查是否存在目的目录
            if (!Directory.Exists(directoryTarget))
            {
                Directory.CreateDirectory(directoryTarget);
            }
            //先来移动文件
            DirectoryInfo directoryInfo = new DirectoryInfo(directorySource);
            FileInfo[] files = directoryInfo.GetFiles();
            //移动所有文件
            foreach (FileInfo file in files)
            {
                //如果自身文件在运行，不能直接覆盖，需要重命名之后再移动
                if (File.Exists(Path.Combine(directoryTarget, file.Name)))
                {
                    if (File.Exists(Path.Combine(directoryTarget, file.Name + ".bak")))
                    {
                        File.Delete(Path.Combine(directoryTarget, file.Name + ".bak"));
                    }
                    File.Move(Path.Combine(directoryTarget, file.Name), Path.Combine(directoryTarget, file.Name + ".bak"));

                }
                file.MoveTo(Path.Combine(directoryTarget, file.Name));

            }
            //最后移动目录
            DirectoryInfo[] directoryInfoArray = directoryInfo.GetDirectories();
            foreach (DirectoryInfo dir in directoryInfoArray)
            {
                MoveFolderTo(Path.Combine(directorySource, dir.Name), Path.Combine(directoryTarget, dir.Name));
            }
        }

        /// <summary>
        /// 从一个目录将其内容复制到另一目录
        /// </summary>
        /// <param name="directorySource">源目录</param>
        /// <param name="directoryTarget">目的目录</param>
        public static void CopyFolderTo(string directorySource, string directoryTarget)
        {
            //检查是否存在目的目录
            if (!Directory.Exists(directoryTarget))
            {
                Directory.CreateDirectory(directoryTarget);
            }
            //先来复制文件
            DirectoryInfo directoryInfo = new DirectoryInfo(directorySource);
            FileInfo[] files = directoryInfo.GetFiles();
            //复制所有文件
            foreach (FileInfo file in files)
            {
                file.CopyTo(Path.Combine(directoryTarget, file.Name));
            }
            //最后复制目录
            DirectoryInfo[] directoryInfoArray = directoryInfo.GetDirectories();
            foreach (DirectoryInfo dir in directoryInfoArray)
            {
                CopyFolderTo(Path.Combine(directorySource, dir.Name), Path.Combine(directoryTarget, dir.Name));
            }

        }

    }
}