FileHelper-文件操作辅助类代码,Asp.Net代码库,德仔网

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【Asp.Net】 FileHelper-文件操作辅助类
作者:Egbert / 发布于2016/1/4/ 624

	using System;
	using System.Collections.Generic;
	using System.IO;
	using System.Text;
	
	namespace Whir.Software.Framework
	{
	 /// <summary>
	 /// 文件辅助类
	 /// </summary>
	 public class FileHelper
	 {
	 /// <summary>
	 /// 编码方式
	 /// </summary>
	 private static readonly Encoding Encoding = Encoding.UTF8;
	
	 /// <summary>
	 /// 递归取得文件夹下文件
	 /// </summary>
	 /// <param name="dir"></param>
	 /// <param name="list"></param>
	 public static void GetFiles(string dir, List<string> list)
	 {
	 GetFiles(dir, list, new List<string>());
	 }
	
	 /// <summary>
	 /// 递归取得文件夹下文件
	 /// </summary>
	 /// <param name="dir"></param>
	 /// <param name="list"></param>
	 /// <param name="fileExtsions"></param>
	 public static void GetFiles(string dir, List<string> list, List<string> fileExtsions)
	 {
	 //添加文件
	 string[] files = Directory.GetFiles(dir);
	 if (fileExtsions.Count > 0)
	 {
	 foreach (string file in files)
	 {
	 string extension = Path.GetExtension(file);
	 if (extension != null && fileExtsions.Contains(extension))
	 {
	 list.Add(file);
	 }
	 }
	 }
	 else
	 {
	 list.AddRange(files);
	 }
	 //如果是目录，则递归
	 DirectoryInfo[] directories = new DirectoryInfo(dir).GetDirectories();
	 foreach (DirectoryInfo item in directories)
	 {
	 GetFiles(item.FullName, list, fileExtsions);
	 }
	 }
	
	 /// <summary>
	 /// 写入文件
	 /// </summary>
	 /// <param name="filePath">文件名</param>
	 /// <param name="content">文件内容</param>
	 public static void WriteFile(string filePath, string content)
	 {
	 try
	 {
	 var fs = new FileStream(filePath, FileMode.Create);
	 Encoding encode = Encoding;
	 //获得字节数组
	 byte[] data = encode.GetBytes(content);
	 //开始写入
	 fs.Write(data, 0, data.Length);
	 //清空缓冲区、关闭流
	 fs.Flush();
	 fs.Close();
	 }
	 catch (Exception ex)
	 {
	 Console.WriteLine(ex.Message);
	 }
	 }
	
	 /// <summary>
	 /// 读取文件
	 /// </summary>
	 /// <param name="filePath"></param>
	 /// <returns></returns>
	 public static string ReadFile(string filePath)
	 {
	 return ReadFile(filePath, Encoding);
	 }
	
	 /// <summary>
	 /// 读取文件
	 /// </summary>
	 /// <param name="filePath"></param>
	 /// <param name="encoding"></param>
	 /// <returns></returns>
	 public static string ReadFile(string filePath, Encoding encoding)
	 {
	 using (var sr = new StreamReader(filePath, encoding))
	 {
	 return sr.ReadToEnd();
	 }
	 }
	
	 /// <summary>
	 /// 读取文件
	 /// </summary>
	 /// <param name="filePath"></param>
	 /// <returns></returns>
	 public static List<string> ReadFileLines(string filePath)
	 {
	 var str = new List<string>();
	 using (var sr = new StreamReader(filePath, Encoding))
	 {
	 String input;
	 while ((input = sr.ReadLine()) != null)
	 {
	 str.Add(input);
	 }
	 }
	 return str;
	 }
	
	 /// <summary>
	 /// 复制文件夹（及文件夹下所有子文件夹和文件）
	 /// </summary>
	 /// <param name="sourcePath">待复制的文件夹路径</param>
	 /// <param name="destinationPath">目标路径</param>
	 public static void CopyDirectory(String sourcePath, String destinationPath)
	 {
	 var info = new DirectoryInfo(sourcePath);
	 Directory.CreateDirectory(destinationPath);
	 foreach (FileSystemInfo fsi in info.GetFileSystemInfos())
	 {
	 String destName = Path.Combine(destinationPath, fsi.Name);
	
	 if (fsi is FileInfo) //如果是文件，复制文件
	 File.Copy(fsi.FullName, destName);
	 else //如果是文件夹，新建文件夹，递归
	 {
	 Directory.CreateDirectory(destName);
	 CopyDirectory(fsi.FullName, destName);
	 }
	 }
	 }
	
	 /// <summary>
	 /// 删除文件夹（及文件夹下所有子文件夹和文件）
	 /// </summary>
	 /// <param name="directoryPath"></param>
	 public static void DeleteFolder(string directoryPath)
	 {
	 foreach (string d in Directory.GetFileSystemEntries(directoryPath))
	 {
	 if (File.Exists(d))
	 {
	 var fi = new FileInfo(d);
	 if (fi.Attributes.ToString().IndexOf("ReadOnly", StringComparison.Ordinal) != -1)
	 fi.Attributes = FileAttributes.Normal;
	 File.Delete(d); //删除文件
	 }
	 else
	 DeleteFolder(d); //删除文件夹
	 }
	 Directory.Delete(directoryPath); //删除空文件夹
	 }
	
	 /// <summary>
	 /// 清空文件夹（及文件夹下所有子文件夹和文件）
	 /// </summary>
	 /// <param name="directoryPath"></param>
	 public static void ClearFolder(string directoryPath)
	 {
	 foreach (string d in Directory.GetFileSystemEntries(directoryPath))
	 {
	 if (File.Exists(d))
	 {
	 var fi = new FileInfo(d);
	 if (fi.Attributes.ToString().IndexOf("ReadOnly", StringComparison.Ordinal) != -1)
	 fi.Attributes = FileAttributes.Normal;
	 File.Delete(d); //删除文件
	 }
	 else
	 DeleteFolder(d); //删除文件夹
	 }
	 }
	
	 /// <summary>
	 /// 取得文件大小，按适当单位转换
	 /// </summary>
	 /// <param name="filepath"></param>
	 /// <returns></returns>
	 public static string GetFileSize(string filepath)
	 {
	 string result = "0KB";
	 if (File.Exists(filepath))
	 {
	 var size = new FileInfo(filepath).Length;
	 int filelength = size.ToString().Length;
	 if (filelength < 4)
	 result = size + "byte";
	 else if (filelength < 7)
	 result = Math.Round(Convert.ToDouble(size / 1024d), 2) + "KB";
	 else if (filelength < 10)
	 result = Math.Round(Convert.ToDouble(size / 1024d / 1024), 2) + "MB";
	 else if (filelength < 13)
	 result = Math.Round(Convert.ToDouble(size / 1024d / 1024 / 1024), 2) + "GB";
	 else
	 result = Math.Round(Convert.ToDouble(size / 1024d / 1024 / 1024 / 1024), 2) + "TB";
	 return result;
	 }
	 return result;
	 }
	 }
	}
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