1、通用文件處理方法集合using System;using System.Collections.Generic;using System.Text;using System.IO;using System.Windows.Forms;using System.Drawing;namespace LaisonTech.CommonBLL / <summary> / 文件操作處理 / </summary> public class FileProcessor #region 文件夾操作 / <summary> / 判斷文件夾是否存在 / </summary

2、> / <param name="filename">文件名,帶路徑</param> / <returns></returns> public static Boolean DirectoryExist(String directname) return Directory.Exists(directname); / <summary> / 創建文件夾 / </summary> / <param name="filename">文件名,帶路徑</param&g

3、t; / <returns></returns> public static Boolean CreateDirectory(String directname) if (Directory.Exists(directname) return true; Directory.CreateDirectory(directname); return Directory.Exists(directname); / <summary> / 刪除文件夾 / </summary> / <param name="filename"&g

4、t;文件名,帶路徑</param> / <returns></returns> public static void DeleteDirectory(String directname) if (!Directory.Exists(directname) return; Directory.Delete(directname); / <summary> / 獲取指定文件夾下,所有文件的文件名 / </summary> / <param name="directoryname"></param>

5、; / <param name="filenamelist"></param> / <returns></returns> public static List<String> GetFileNameInDirectory(String directoryname) bool bl = Directory.Exists(directoryname); if (!bl) return null; String filenameary = Directory.GetFiles(directoryname); if (f

6、ilenameary = null | filenameary.Length < 1) return null; List<String> ret = new List<String>(); ret.AddRange(filenameary); return ret; / <summary> / 獲取指定文件夾下,指定后綴名的文件名 / </summary> / <param name="directoryname"></param> / <param name="suffix&q

7、uot;>后綴名,不含點號.如"jpg"</param> / <returns></returns> public static List<String> GetFileNameInDirectory(String directoryname, String suffix) bool bl = Directory.Exists(directoryname); if (!bl) return null; if (suffix0 = '*') suffix = suffix.Substring(1); if

8、(suffix0 = '.') suffix = suffix.Substring(1); if (suffix.Length > 0) suffix = "*." + suffix; String filenameary = null; if (suffix.Length > 2) filenameary = Directory.GetFiles(directoryname, suffix); else filenameary = Directory.GetFiles(directoryname); if (filenameary = null

9、 | filenameary.Length < 1) return null; List<String> ret = new List<String>(); ret.AddRange(filenameary); return ret; #endregion#region 文件操作(非文件內容) / <summary> / 判斷文件是否存在 / </summary> / <param name="filename">文件名,帶路徑</param> / <returns></retu

10、rns> public static Boolean FileExist(String filename) return File.Exists(filename); / <summary> / 獲取文件長度 / </summary> / <param name="filename">文件名</param> / <returns>文件不存在,返回-1.存在,返回文件長度</returns> public static Int32 GetFileLength(String filename) Boo

11、lean blret = File.Exists(filename); if (!blret) return -1; FileInfo fi = new FileInfo(filename); Int32 ret = (Int32 )fi.Length; return ret; / <summary> / 從不帶路徑的文件名里,獲取后綴名. 比如”abc.jpg” 得到”jpg” / </summary> / <param name="filename">不帶路徑的文件名</param> / <returns>后綴

12、名,不帶點號</returns> public static String GetFileSuffixName(String filename) if (filename.Length < 1) return String.Empty; Int32 index_lastpoint = filename.LastIndexOf('.'); if (index_lastpoint < 0) | (index_lastpoint >= filename.Length) MessageProcessor.EX("Invalid file name

13、.Can't find ''"); String ret = filename.Substring(index_lastpoint + 1); return ret; / <summary> / 從帶路徑的文件名里,獲取路徑名 比如”c:programdemo.jpg”得到” c:program” / </summary> / <param name="pathfilename">帶路徑的文件名</param> / <returns>不帶路徑,不帶后綴名的純文件名</retu

14、rns> public static String GetDirectoryName(String pathfilename) if (pathfilename.Length < 1) return String.Empty; Int32 index_lastbias = pathfilename.LastIndexOf(''); String dir = pathfilename.Substring(0, index_lastbias); return dir; / <summary> / 從帶路徑的文件名里,獲取帶后綴名的純文件名 /比如”c:pro

15、gramdemo.jpg”得到” demo.jpg” / </summary> / <param name="pathfilename">帶路徑的文件名</param> / <returns>不帶路徑,帶后綴名的純文件名</returns> public static String GetPureFileNameWithSuffix(String pathfilename) if (pathfilename.Length < 1) return String.Empty; Int32 index_lastbi

16、as = pathfilename.LastIndexOf(''); if (index_lastbias < 0) | (index_lastbias >= pathfilename.Length) MessageProcessor.EX("Invalid file name.Can't find ''"); String ret = pathfilename.Substring(index_lastbias + 1); return ret; / <summary> / 從帶路徑的文件名里,獲取不帶后綴名的

17、文件名 /比如”c:programdemo.jpg”得到” demo” / </summary> / <param name="pathfilename">帶路徑的文件名</param> / <returns>不帶路徑,不帶后綴名的純文件名</returns> public static String GetPureFileNameNoSuffix(String pathfilename) if (pathfilename.Length < 1) return String.Empty; Int32 inde

18、x_lastbias = pathfilename.LastIndexOf(''); Int32 index_lastpoint = pathfilename.LastIndexOf('.'); if (index_lastpoint < 0) | (index_lastbias < 0) | (index_lastbias >= index_lastpoint) return String.Empty; Int32 pfnlen = index_lastpoint - index_lastbias - 1; /純文件名長度 if (pfnle

19、n < 1) return String.Empty; String ret = pathfilename.Substring(index_lastbias + 1, pfnlen); return ret; / <summary> / 選擇1個文件 / </summary> / <param name="title">選擇窗口的標題</param> / <param name="defaultpath"></param> / <param name="filt

20、er">格式形如Text files (*.txt)|*.txt|All files (*.*)|*.*</param> / <param name="filename">選中的文件名</param> / <returns></returns> public static Boolean SelectFile(String title, String defaultpath, String filter, out String filename) /Text files (*.txt)|*.txt|

21、All files (*.*)|*.* /Image Files(*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|All files (*.*)|*.* filename = String.Empty; OpenFileDialog dlg = new OpenFileDialog(); dlg.CheckFileExists = true; dlg.Title = title; dlg.InitialDirectory = defaultpath; dlg.Filter = filter; dlg.RestoreDirectory = true; dlg.Multi

22、select = false; dlg.FilterIndex = 0; DialogResult ret = dlg.ShowDialog(); if (ret != DialogResult.OK) return false; filename = dlg.FileName; return true; / <summary> / 選擇多個文件 / </summary> / <param name="title">選擇窗口的標題</param> / <param name="defaultpath"

23、>默認路徑</param> / <param name="filter">格式形如Text files (*.txt)|*.txt|All files (*.*)|*.*</param> / <param name="filename">選中的文件名稱數組</param> / <returns></returns> public static Boolean SelectFiles(String title, String defaultpath, String f

24、ilter, out String filenames) filenames = null; OpenFileDialog dlg = new OpenFileDialog(); dlg.CheckFileExists = true; dlg.Title = title; dlg.Filter = filter; dlg.InitialDirectory = defaultpath; dlg.RestoreDirectory = true; dlg.Multiselect = true; dlg.FilterIndex = 0; DialogResult ret = dlg.ShowDialo

25、g(); if (ret != DialogResult.OK) return false; filenames = dlg.FileNames; return true; / <summary> / 選擇一個文件夾 / </summary> / <param name="title">選擇窗口的標題</param> / <param name="defaultpath">默認路徑</param> / <param name="directory">選

26、中的文件夾</param> / <returns></returns> public static Boolean SelectDirectory(String title, String defaultpath, out String directory) directory = defaultpath; FolderBrowserDialog dlg = new FolderBrowserDialog(); dlg.Description = title; dlg.SelectedPath = defaultpath; dlg.ShowNewFolder

27、Button = true; DialogResult ret = dlg.ShowDialog(); if (ret != DialogResult.OK) return false; directory = dlg.SelectedPath; return true; / <summary> / 顯示 保存文件 對話框,獲取目標路徑 / </summary> / <param name="defaultpath"></param> / <param name="filter">格式形如Tex

28、t files (*.txt)|*.txt|All files (*.*)|*.*</param> / <param name="filename"></param> / <returns></returns> public static Boolean GetSaveFileName(String defaultpath, String filter, out String filename) /Text files (*.txt)|*.txt|All files (*.*)|*.* /Image Files(*

29、.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|All files (*.*)|*.* filename = String.Empty; SaveFileDialog dlg = new SaveFileDialog(); dlg.Filter = filter; dlg.InitialDirectory = defaultpath; dlg.RestoreDirectory = true; dlg.FilterIndex = 0; DialogResult ret = dlg.ShowDialog(); if (ret != DialogResult.OK) retu

30、rn false; /Stream filestream = dlg.OpenFile(); filename = dlg.FileName; return true; / <summary> / 刪除文件 / </summary> / <param name="filename"></param> / <returns></returns> public static Boolean DeleteFile(String filename) Boolean bl = FileExist(filename

31、); if (!bl) return true; try File.Delete(filename); catch (System.Exception ex) Console.WriteLine("Delete file error:" + ex.Message); return false; bl = FileExist(filename); return !bl; / <summary> / 復制文件 / </summary> / <param name="srcfilename"></param> /

32、 <param name="destfilename"></param> / <returns></returns> public static Boolean CopyFile(String srcFileName, String destFileName) Boolean bl = FileExist(srcFileName); if (!bl) return false; File.Copy(srcFileName, destFileName, true); bl = FileExist(destFileName); r

33、eturn bl; / <summary> / 剪切文件 / </summary> / <param name="srcfilename"></param> / <param name="destfilename"></param> / <returns></returns> public static Boolean MoveFile(String srcFileName, String destFileName) Boolean bl = FileExis

34、t(srcFileName); if (!bl) return false; File.Move(srcFileName, destFileName); bl = FileExist(destFileName); return bl; #endregion#region 文件內容操作 / <summary> / 讀取文件里所有內容到文本里 / </summary> / <param name="filename">文件名</param> / <param name="filestring">讀取

35、到的文件內容</param> / <returns>裝載成功返回True;失敗返回False</returns> public static Boolean ReadFileString(String filename, out String filestring) filestring = String.Empty; Int32 filelen = GetFileLength(filename); if (filelen < 1) return false; filestring = File.ReadAllText(filename, Encodi

36、ng.Default); return true; / <summary> / 讀取文件里所有內容到文本列表里 / </summary> / <param name="filename">文件名</param> / <param name="filestring">讀取到的文件內容</param> / <returns>裝載成功返回True;失敗返回False</returns> public static Boolean ReadFileString(Str

37、ing filename, out List<String> filestring) filestring = new List<String>(); Int32 filelen = GetFileLength(filename); if (filelen < 1) return false; String ret = File.ReadAllLines(filename, Encoding.Default); if (ret != null) && (ret.Length > 0) filestring.AddRange(ret); ret

38、urn true; / <summary> / 保存文本到文件 / </summary> / <param name="filename">文件名</param> / <param name="filestring">文件內容</param> / <returns>保存成功返回True;失敗返回False</returns> public static Boolean WriteFileString(String filename, List<Strin

39、g> filestring) if (filestring = null) | (filestring.Count < 1) return false; String dir = GetDirectoryName(filename); if (!Directory.Exists(dir) Directory.CreateDirectory(dir); /先刪除當前文件 if (File.Exists(filename) File.Delete(filename); String strary = filestring.ToArray(); File.WriteAllLines(fi

40、lename, strary, Encoding.Default); return true; / <summary> / 保存文本到文件 / </summary> / <param name="filename">文件名</param> / <param name="filestring">文件內容</param> / <returns>保存成功返回True;失敗返回False</returns> public static Boolean WriteFil

41、eString(String filename, String filestring) String dir = GetDirectoryName(filename); if (!Directory.Exists(dir) Directory.CreateDirectory(dir); /先刪除當前文件 if (File.Exists(filename) File.Delete(filename); File.WriteAllText(filename, filestring, Encoding.Default); return true; / <summary> / 讀取文件里所

42、有內容到字節數組里 / </summary> / <param name="filename">文件名</param> / <param name="filedata">目標緩沖區</param> / <returns>裝載成功返回True;失敗返回False</returns> public static Boolean ReadFileBytes(String filename, out Byte filedata) filedata = null; Int32 fi

43、lelen = GetFileLength(filename); if (filelen < 1) return false; filedata = File.ReadAllBytes(filename); return true; / <summary> / 把字節數組寫入文件里.該文件如果存在,則先刪除 / </summary> / <param name="filename">文件名,帶完整路徑</param> / <param name="filedata">文件內容數據</

44、param> / <returns></returns> public static Boolean WriteFileBytes(String filename, Byte filedata) if (filedata = null) | (filedata.Length < 1) MessageProcessor.EX("文件內容不能為空"); String dir = GetDirectoryName(filename); if (!Directory.Exists(dir) Directory.CreateDirectory(dir); /先刪除當前文件 if (File.Exists(filename) File.Delete(filename); /再創建新文件 File.WriteAllBytes(filename, filedata); return true; / <summary> / 把數據寫入文件里指定位置 / </summary>