[C#] 常用工具类——文件操作类

时间:2023-06-04 19:04:26
/// <para> FilesUpload:工具方法:ASP.NET上传文件的方法</para>
/// <para> FileExists:返回文件是否存在</para>
/// <para> IsImgFilename:判断文件名是否为浏览器可以直接显示的图片文件名</para>
/// <para> CopyFiles:复制指定目录的所有文件</para>
/// <para> MoveFiles:移动指定目录的所有文件</para>
/// <para> DeleteDirectoryFiles:删除指定目录的所有文件和子目录</para>
/// <para> DeleteFiles:删除指定目录下的指定文件</para>
/// <para> CreateDirectory:创建指定目录</para>
/// <para> CreateDirectory:建立子目录</para>
/// <para> ReNameFloder:重命名文件夹</para>
/// <para> DeleteDirectory:删除指定目录</para>
/// <para> DirectoryIsExists:检测目录是否存在[+2方法重载]</para>
/// <para> DeleteSubDirectory:删除指定目录的所有子目录,不包括对当前目录文件的删除</para>
/// <para> GetFileWriteTime:获取文件最后修改时间</para>
/// <para> GetFileExtension:返回指定路径的文件的扩展名</para>
/// <para> IsHiddenFile:判断是否是隐藏文件</para>
/// <para> ReadTxtFile:以只读方式读取文本文件</para>
/// <para> WriteStrToTxtFile:将内容写入文本文件(如果文件path存在就打开,不存在就新建)</para>
/// <para> GetLocalDrives:获取本地驱动器名列表</para>
/// <para> GetAppCurrentDirectory:获取应用程序当前可执行文件的路径</para>
/// <para> GetFileSize:获取文件大小并以B,KB,GB,TB方式表示[+2 重载]</para>
/// <para> DownLoadFiles:下载文件</para>
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using System;
using System.Configuration;
using System.Collections.Generic;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.Security;
using System.IO;
using System.IO.Compression;
using System.Xml;
using System.Diagnostics;
using System.Windows.Forms;
using System.Threading; namespace Utils
{
/// <summary>
/// <para> </para>
///  常用工具类——文件操作类
/// <para> ---------------------------------------------------------------------------------------</para>
/// <para> FilesUpload:工具方法:ASP.NET上传文件的方法</para>
/// <para> FileExists:返回文件是否存在</para>
/// <para> IsImgFilename:判断文件名是否为浏览器可以直接显示的图片文件名</para>
/// <para> CopyFiles:复制指定目录的所有文件</para>
/// <para> MoveFiles:移动指定目录的所有文件</para>
/// <para> DeleteDirectoryFiles:删除指定目录的所有文件和子目录</para>
/// <para> DeleteFiles:删除指定目录下的指定文件</para>
/// <para> CreateDirectory:创建指定目录</para>
/// <para> CreateDirectory:建立子目录</para>
/// <para> ReNameFloder:重命名文件夹</para>
/// <para> DeleteDirectory:删除指定目录</para>
/// <para> DirectoryIsExists:检测目录是否存在[+2方法重载]</para>
/// <para> DeleteSubDirectory:删除指定目录的所有子目录,不包括对当前目录文件的删除</para>
/// <para> GetFileWriteTime:获取文件最后修改时间</para>
/// <para> GetFileExtension:返回指定路径的文件的扩展名</para>
/// <para> IsHiddenFile:判断是否是隐藏文件</para>
/// <para> ReadTxtFile:以只读方式读取文本文件</para>
/// <para> WriteStrToTxtFile:将内容写入文本文件(如果文件path存在就打开,不存在就新建)</para>
/// <para> GetLocalDrives:获取本地驱动器名列表</para>
/// <para> GetAppCurrentDirectory:获取应用程序当前可执行文件的路径</para>
/// <para> GetFileSize:获取文件大小并以B,KB,GB,TB方式表示[+2 重载]</para>
/// <para> DownLoadFiles:下载文件</para>
/// </summary>
public class FilesHelper
{
private const string PATH_SPLIT_CHAR = "\\"; #region 工具方法:ASP.NET上传文件的方法
/// <summary>
/// 工具方法:上传文件的方法
/// </summary>
/// <param name="myFileUpload">上传控件的ID</param>
/// <param name="allowExtensions">允许上传的扩展文件名类型,如:string[] allowExtensions = { ".doc", ".xls", ".ppt", ".jpg", ".gif" };</param>
/// <param name="maxLength">允许上传的最大大小,以M为单位</param>
/// <param name="savePath">保存文件的目录,注意是绝对路径,如:Server.MapPath("~/upload/");</param>
/// <param name="saveName">保存的文件名,如果是""则以原文件名保存</param>
public static void FilesUpload(FileUpload myFileUpload, string[] allowExtensions, int maxLength, string savePath, string saveName)
{
// 文件格式是否允许上传
bool fileAllow = false;
//检查是否有文件案
if (myFileUpload.HasFile)
{
// 检查文件大小, ContentLength获取的是字节,转成M的时候要除以2次1024
if (myFileUpload.PostedFile.ContentLength / 1024 / 1024 >= maxLength)
{
throw new Exception("只能上传小于2M的文件!");
}
//取得上传文件之扩展文件名,并转换成小写字母
string fileExtension = System.IO.Path.GetExtension(myFileUpload.FileName).ToLower();
string tmp = ""; // 存储允许上传的文件后缀名
//检查扩展文件名是否符合限定类型
for (int i = 0; i < allowExtensions.Length; i++)
{
tmp += i == allowExtensions.Length - 1 ? allowExtensions[i] : allowExtensions[i] + ",";
if (fileExtension == allowExtensions[i])
{
fileAllow = true;
}
}
if (fileAllow)
{
try
{
string path = savePath + (saveName == "" ? myFileUpload.FileName : saveName);
//存储文件到文件夹
myFileUpload.SaveAs(path);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
else
{
throw new Exception("文件格式不符,可以上传的文件格式为:" + tmp);
}
}
else
{
throw new Exception("请选择要上传的文件!");
}
}
#endregion #region 返回文件是否存在
/// <summary>
/// 返回文件是否存在
/// </summary>
/// <param name="filename">文件名</param>
/// <returns>是否存在</returns>
public static bool FileExists(string filename)
{
return System.IO.File.Exists(filename);
}
#endregion #region 判断文件名是否为浏览器可以直接显示的图片文件名
/// <summary>
/// 判断文件名是否为浏览器可以直接显示的图片文件名
/// </summary>
/// <param name="filename">文件名</param>
/// <returns>是否可以直接显示</returns>
public static bool IsImgFilename(string filename)
{
filename = filename.Trim();
if (filename.EndsWith(".") || filename.IndexOf(".") == -1)
{
return false;
}
string extname = filename.Substring(filename.LastIndexOf(".") + 1).ToLower();
return (extname == "jpg" || extname == "jpeg" || extname == "png" || extname == "bmp" || extname == "gif");
}
#endregion #region 复制指定目录的所有文件
/// <summary>
/// 复制指定目录的所有文件
/// </summary>
/// <param name="sourceDir">原始目录</param>
/// <param name="targetDir">目标目录</param>
/// <param name="overWrite">如果为true,覆盖同名文件,否则不覆盖</param>
/// <param name="copySubDir">如果为true,包含目录,否则不包含</param>
public static void CopyFiles(string sourceDir, string targetDir, bool overWrite, bool copySubDir)
{
//复制当前目录文件
foreach (string sourceFileName in Directory.GetFiles(sourceDir))
{
string targetFileName = Path.Combine(targetDir, sourceFileName.Substring(sourceFileName.LastIndexOf(PATH_SPLIT_CHAR) + 1)); if (File.Exists(targetFileName))
{
if (overWrite == true)
{
File.SetAttributes(targetFileName, FileAttributes.Normal);
File.Copy(sourceFileName, targetFileName, overWrite);
}
}
else
{
File.Copy(sourceFileName, targetFileName, overWrite);
}
}
}
#endregion #region 移动指定目录的所有文件
/// <summary>
/// 移动指定目录的所有文件
/// </summary>
/// <param name="sourceDir">原始目录</param>
/// <param name="targetDir">目标目录</param>
/// <param name="overWrite">如果为true,覆盖同名文件,否则不覆盖</param>
/// <param name="moveSubDir">如果为true,包含目录,否则不包含</param>
public static void MoveFiles(string sourceDir, string targetDir, bool overWrite, bool moveSubDir)
{
//移动当前目录文件
foreach (string sourceFileName in Directory.GetFiles(sourceDir))
{
string targetFileName = Path.Combine(targetDir, sourceFileName.Substring(sourceFileName.LastIndexOf(PATH_SPLIT_CHAR) + 1));
if (File.Exists(targetFileName))
{
if (overWrite == true)
{
File.SetAttributes(targetFileName, FileAttributes.Normal);
File.Delete(targetFileName);
File.Move(sourceFileName, targetFileName);
}
}
else
{
File.Move(sourceFileName, targetFileName);
}
}
if (moveSubDir)
{
foreach (string sourceSubDir in Directory.GetDirectories(sourceDir))
{
string targetSubDir = Path.Combine(targetDir, sourceSubDir.Substring(sourceSubDir.LastIndexOf(PATH_SPLIT_CHAR) + 1));
if (!Directory.Exists(targetSubDir))
Directory.CreateDirectory(targetSubDir);
MoveFiles(sourceSubDir, targetSubDir, overWrite, true);
Directory.Delete(sourceSubDir);
}
}
}
#endregion #region 删除指定目录的所有文件和子目录
/// <summary>
/// 删除指定目录的所有文件和子目录
/// </summary>
/// <param name="TargetDir">操作目录</param>
/// <param name="delSubDir">如果为true,包含对子目录的操作</param>
public static void DeleteDirectoryFiles(string TargetDir, bool delSubDir)
{
foreach (string fileName in Directory.GetFiles(TargetDir))
{
File.SetAttributes(fileName, FileAttributes.Normal);
File.Delete(fileName);
}
if (delSubDir)
{
DirectoryInfo dir = new DirectoryInfo(TargetDir);
foreach (DirectoryInfo subDi in dir.GetDirectories())
{
DeleteDirectoryFiles(subDi.FullName, true);
subDi.Delete();
}
}
}
#endregion #region 删除指定目录下的指定文件
/// <summary>
/// 删除指定目录下的指定文件
/// </summary>
/// <param name="TargetFileDir">指定文件的目录</param>
public static void DeleteFiles(string TargetFileDir)
{
File.Delete(TargetFileDir);
}
#endregion #region 创建指定目录
/// <summary>
/// 创建指定目录
/// </summary>
/// <param name="targetDir"></param>
public static void CreateDirectory(string targetDir)
{
DirectoryInfo dir = new DirectoryInfo(targetDir);
if (!dir.Exists)
dir.Create();
}
#endregion #region 建立子目录
/// <summary>
/// 建立子目录
/// </summary>
/// <param name="parentDir">目录路径</param>
/// <param name="subDirName">子目录名称</param>
public static void CreateDirectory(string parentDir, string subDirName)
{
CreateDirectory(parentDir + PATH_SPLIT_CHAR + subDirName);
}
#endregion #region 重命名文件夹
/// <summary>
/// 重命名文件夹
/// </summary>
/// <param name="OldFloderName">原路径文件夹名称</param>
/// <param name="NewFloderName">新路径文件夹名称</param>
/// <returns></returns>
public static bool ReNameFloder(string OldFloderName, string NewFloderName)
{
try
{
if (Directory.Exists(HttpContext.Current.Server.MapPath("//") + OldFloderName))
{
Directory.Move(HttpContext.Current.Server.MapPath("//") + OldFloderName, HttpContext.Current.Server.MapPath("//") + NewFloderName);
}
return true;
}
catch
{
return false;
}
}
#endregion #region 删除指定目录
/// <summary>
/// 删除指定目录
/// </summary>
/// <param name="targetDir">目录路径</param>
public static void DeleteDirectory(string targetDir)
{
DirectoryInfo dirInfo = new DirectoryInfo(targetDir);
if (dirInfo.Exists)
{
DeleteDirectoryFiles(targetDir, true);
dirInfo.Delete(true);
}
}
#endregion #region 检测目录是否存在
/// <summary>
/// 检测目录是否存在
/// </summary>
/// <param name="StrPath">路径</param>
/// <returns></returns>
public static bool DirectoryIsExists(string StrPath)
{
DirectoryInfo dirInfo = new DirectoryInfo(StrPath);
return dirInfo.Exists;
}
/// <summary>
/// 检测目录是否存在
/// </summary>
/// <param name="StrPath">路径</param>
/// <param name="Create">如果不存在,是否创建</param>
public static void DirectoryIsExists(string StrPath, bool Create)
{
DirectoryInfo dirInfo = new DirectoryInfo(StrPath);
//return dirInfo.Exists;
if (!dirInfo.Exists)
{
if (Create) dirInfo.Create();
}
}
#endregion #region 删除指定目录的所有子目录,不包括对当前目录文件的删除
/// <summary>
/// 删除指定目录的所有子目录,不包括对当前目录文件的删除
/// </summary>
/// <param name="targetDir">目录路径</param>
public static void DeleteSubDirectory(string targetDir)
{
foreach (string subDir in Directory.GetDirectories(targetDir))
{
DeleteDirectory(subDir);
}
}
#endregion #region 获取文件最后修改时间
/// <summary>
/// 获取文件最后修改时间
/// </summary>
/// <param name="FileUrl">文件真实路径</param>
/// <returns></returns>
public DateTime GetFileWriteTime(string FileUrl)
{
return File.GetLastWriteTime(FileUrl);
}
#endregion #region 返回指定路径的文件的扩展名
/// <summary>
/// 返回指定路径的文件的扩展名
/// </summary>
/// <param name="PathFileName">完整路径的文件</param>
/// <returns></returns>
public string GetFileExtension(string PathFileName)
{
return Path.GetExtension(PathFileName);
}
#endregion #region 判断是否是隐藏文件
/// <summary>
/// 判断是否是隐藏文件
/// </summary>
/// <param name="path">文件路径</param>
/// <returns></returns>
public bool IsHiddenFile(string path)
{
FileAttributes MyAttributes = File.GetAttributes(path);
string MyFileType = MyAttributes.ToString();
if (MyFileType.LastIndexOf("Hidden") != -1) //是否隐藏文件
{
return true;
}
else
return false;
}
#endregion #region 以只读方式读取文本文件
/// <summary>
/// 以只读方式读取文本文件
/// </summary>
/// <param name="FilePath">文件路径及文件名</param>
/// <returns></returns>
public static string ReadTxtFile(string FilePath)
{
string content = "";//返回的字符串
using (FileStream fs = new FileStream(FilePath, FileMode.Open))
{
using (StreamReader reader = new StreamReader(fs, Encoding.UTF8))
{
string text = string.Empty;
while (!reader.EndOfStream)
{
text += reader.ReadLine() + "\r\n";
content = text;
}
}
}
return content;
}
#endregion #region 将内容写入文本文件(如果文件path存在就打开,不存在就新建)
/// <summary>
/// 将内容写入文本文件(如果文件path存在就打开,不存在就新建)
/// </summary>
/// <param name="FilePath">文件路径</param>
/// <param name="WriteStr">要写入的内容</param>
/// <param name="FileModes">写入模式:append 是追加写, CreateNew 是覆盖</param>
public static void WriteStrToTxtFile(string FilePath, string WriteStr, FileMode FileModes)
{
FileStream fst = new FileStream(FilePath, FileModes);
StreamWriter swt = new StreamWriter(fst, System.Text.Encoding.GetEncoding("utf-8"));
swt.WriteLine(WriteStr);
swt.Close();
fst.Close();
}
#endregion #region 获取本地驱动器名列表
/// <summary>
/// 获取本地驱动器名列表
/// </summary>
/// <returns></returns>
public static string[] GetLocalDrives()
{
return Directory.GetLogicalDrives();
}
#endregion #region 获取应用程序当前可执行文件的路径
/// <summary>
/// 获取应用程序当前可执行文件的路径
/// </summary>
/// <returns></returns>
public static string GetAppCurrentDirectory()
{
return Application.StartupPath;
}
#endregion #region 获取文件大小并以B,KB,GB,TB方式表示[+2 重载]
/// <summary>
/// 获取文件大小并以B,KB,GB,TB方式表示
/// </summary>
/// <param name="File">文件(FileInfo类型)</param>
/// <returns></returns>
public static string GetFileSize(FileInfo File)
{
string Result = "";
long FileSize = File.Length;
if (FileSize >= 1024 * 1024 * 1024)
{
if (FileSize / 1024 * 1024 * 1024 * 1024 >= 1024) Result = string.Format("{0:############0.00} TB", (double)FileSize / 1024 * 1024 * 1024 * 1024);
else Result = string.Format("{0:####0.00} GB", (double)FileSize / 1024 * 1024 * 1024);
}
else if (FileSize >= 1024 * 1024) Result = string.Format("{0:####0.00} MB", (double)FileSize / 1024 * 1024);
else if (FileSize >= 1024) Result = string.Format("{0:####0.00} KB", (double)FileSize / 1024);
else Result = string.Format("{0:####0.00} Bytes", FileSize);
return Result;
}
/// <summary>
/// 获取文件大小并以B,KB,GB,TB方式表示
/// </summary>
/// <param name="FilePath">文件的具体路径</param>
/// <returns></returns>
public static string GetFileSize(string FilePath)
{
string Result = "";
FileInfo File = new FileInfo(FilePath);
long FileSize = File.Length;
if (FileSize >= 1024 * 1024 * 1024)
{
if (FileSize / 1024 * 1024 * 1024 * 1024 >= 1024) Result = string.Format("{0:########0.00} TB", (double)FileSize / 1024 * 1024 * 1024 * 1024);
else Result = string.Format("{0:####0.00} GB", (double)FileSize / 1024 * 1024 * 1024);
}
else if (FileSize >= 1024 * 1024) Result = string.Format("{0:####0.00} MB", (double)FileSize / 1024 * 1024);
else if (FileSize >= 1024) Result = string.Format("{0:####0.00} KB", (double)FileSize / 1024);
else Result = string.Format("{0:####0.00} Bytes", FileSize);
return Result;
}
#endregion #region 下载文件
/// <summary>
/// 下载文件
/// </summary>
/// <param name="FileFullPath">下载文件下载的完整路径及名称</param>
public static void DownLoadFiles(string FileFullPath)
{
if (!string.IsNullOrEmpty(FileFullPath) && FileExists(FileFullPath))
{
FileInfo fi = new FileInfo(FileFullPath);//文件信息
FileFullPath = HttpUtility.UrlEncode(FileFullPath); //对文件名编码
FileFullPath = FileFullPath.Replace("+", "%20"); //解决空格被编码为"+"号的问题
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ContentType = "application/octet-stream";
HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment; filename=" + FileFullPath);
HttpContext.Current.Response.AppendHeader("content-length", fi.Length.ToString()); //文件长度
int chunkSize = 102400;//缓存区大小,可根据服务器性能及网络情况进行修改
byte[] buffer = new byte[chunkSize]; //缓存区
using (FileStream fs = fi.Open(FileMode.Open)) //打开一个文件流
{
while (fs.Position >= 0 && HttpContext.Current.Response.IsClientConnected) //如果没到文件尾并且客户在线
{
int tmp = fs.Read(buffer, 0, chunkSize);//读取一块文件
if (tmp <= 0) break; //tmp=0说明文件已经读取完毕,则跳出循环
HttpContext.Current.Response.OutputStream.Write(buffer, 0, tmp);//向客户端传送一块文件
HttpContext.Current.Response.Flush();//保证缓存全部送出
Thread.Sleep(10);//主线程休息一下,以释放CPU
}
}
}
}
#endregion
}
}