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;
}
}
}