C#文件操作大全

1、c#文件操作大全/using system.io; foreach (sing dirstr in directory.getdirectories(%1) directoryinfo dir = new directoryinfo(dirstr); arraylist ers=new arraylist(); filesysteminfo arr = dir.getfilesysteminfos(); for (int i = 0; i folders.count; i+) fileinfo f = foldersi as fileinfo; if (f = null) directoryi

2、nfo d = foldersi as directoryinfo; d.delete(); 6.清空文件夹 /using system.io; directory.delete(%1,true); directory.createdirectory(%1); 7.读取文件 7.1.操作系统默认编码 /using system.io; streamreader s = file.opentt(%1); string %2 = null; while (%2 = s.readline() != null) %3 s.close(); 7.2.utf-8编码 /* using system.io;

3、 using system.text; */ streamreader srfile = new streamreader(%1,eoding.utf8); while (string %2 = srfile.readline() != null) %3 srfile.close(); 7.3.分块读取 /* using system.io; using system.text; */ try filestream fs=new filestream(%1,filemode.open,fileaccess.read); binaryreader br=new binaryreader(fs,n

4、ew asciiencoding(); byte chunk; do chunk=br.readbytes(10240); if(chunk.length 0) %2 /chunk,chunk.length while(chunk.length fs.close(); ch /return -1; 8.写入文件 /using system.io; fileinfo f = new fileinfo(%1); streamwriter w = f.createtext(); w.writeline(%2); w.flush(); w.close(); 9.写入随机文件 /using system

5、.io; byte dataarray = new byte100000;/new random().nextbytes(dataarray); using(filestream filestream = new filestream(%1, filemode.create) / write the data to the file, byte by byte. for(int i = 0; i dataarray.length; i+) filestream.writebyte(dataarrayi); / set the stream position to the beginning o

6、f the file. filestream.seek(0, seekorigin.begin); / read and verify the data. for(int i = 0; i filestream.length; i+) if(dataarrayi != filestream.readbyte() /写入数据错误 return; / 数据流 +filestream.name+ 已验证 10.读取文件属性 /using system.io; fileinfo f = new fileinfo(%1);/f.creationtime,f.fullname if(f.attribute

7、s fileattributes.readonly) != 0) %2 ee %3 11.写入属性 /using system.io; fileinfo f = new fileinfo(%1); /设置只读 f.attributes = myfile.attributes | fileattributes.readonly; /设置可写 f.attributes = myfile.attributes fileattributes.readonly; 12.枚举一个文件夹中的全部文件夹 /using system.io; foreach (string %2 in directory.get

8、directories(%1) %3 /* directoryinfo dir = new directoryinfo(%1); fileinfo files = dir.getfiles( *.* foreach(fileinfo %2 in files) %3 */ 13.复制文件夹 /* using system.io; using system.collections; */ string path = (%2.lastindexof(path.directoryseparatorchar) = %2.length - 1) ? %2 : %2+path.directorysepara

9、torchar; string parent = path.getdirectoryname(%1); directory.createdirectory(path + path.getfilename(%1); directoryinfo dir = new directoryinfo(%1.lastindexof(path.directoryseparatorchar) = %1.length - 1) ? %1 : %1 + path.directoryseparatorchar); filesysteminfo filearr = dir.getfilesysteminfos(); q

10、ueue filesysteminfo folders = new queue filesysteminfo (dir.getfilesysteminfos(); while (folders.count 0) filesysteminfo tmp = folders.dequeue(); fileinfo f = tmp as fileinfo; if (f = null) directoryinfo d = tmp as directoryinfo; directory.createdirectory(d.fullname.replace(parent.lastindexof(path.d

11、irectoryseparatorchar) = parent.length - 1) ? parent : parent + path.directoryseparatorchar, path); foreach (filesysteminfo fi in d.getfilesysteminfos() folders.enqueue(fi); else f.copyto(f.fullname.replace(parent, path); 14.复制名目下全部的文件夹到另一个文件夹下 /* using system.io; using system.collections; */ direct

12、oryinfo d = new directoryinfo(%1); foreach (directoryinfo in d.getdirectories() queue filesysteminfo al = new queue filesysteminfo (dirs.getfilesysteminfos(); while (al.count 0) filesysteminfo temp = al.dequeue(); fileinfo file = temp as fileinfo; if (file = null) directoryinfo directory = temp as d

13、irectoryinfo; directory.createdirectory(path + directory.name); foreach (filesysteminfo fsi in directory.getfilesysteminfos() al.enqueue(fsi); else file.copy(file.fullname, path + file.name); 15.移动文件夹 /* using system.io; using system.collections; */ string filename = path.getfilename(%1); string pat

14、h=(%2.lastindexof(path.directoryseparatorchar) = %2.length - 1) ? %2 : %2 + path.directoryseparatorchar; if (path.getpathroot(%1) = path.getpathroot(%2) directory.move(%1, path + filename); else string parent = path.getdirectoryname(%1); directory.createdirectory(path + path.getfilename(%1); directo

15、ryinfo dir = new directoryinfo(%1.lastindexof(path.directoryseparatorchar) = %1.length - 1) ? %1 : %1 + path.directoryseparatorchar); filesysteminfo filearr = dir.getfilesysteminfos(); queue filesysteminfo folders = new queue filesysteminfo (dir.getfilesysteminfos(); while (folders.count 0) filesyst

16、eminfo tmp = folders.dequeue(); fileinfo f = tmp as fileinfo; if (f = null) directoryinfo d = tmp as directoryinfo; directoryinfo dpath = new directoryinfo(d.fullname.replace(parent.lastindexof(path.directoryseparatorchar) = parent.length - 1) ? parent : parent + path.directoryseparatorchar, path);

17、dpath.create(); foreach (filesysteminfo fi in d.getfilesysteminfos() folders.enqueue(fi); else f.moveto(f.fullname.replace(parent, path); directory.delete(%1, true); 16.移动名目下全部的文件夹到另一个名目下 /* using system.io; using system.collections; */ string filename = path.getfilename(%1); if (path.getpathroot(%1

18、) = path.getpathroot(%2) foreach (string dir in directory.getdirectories(%1) directory.move(dir, path.combine(%2,filename); else foreach (string dir2 in directory.getdirectories(%1) string parent = path.getdirectoryname(dir2); directory.createdirectory(path.combine(%2, path.getfilename(dir2); string

19、 dir = (dir2.lastindexof(path.directoryseparatorchar) = dir2.length - 1) ? dir2 : dir2 + path.directoryseparatorchar; directoryinfo dirdir = new directoryinfo(dir); filesysteminfo filearr = dirdir.getfilesysteminfos(); queue filesysteminfo folders = new queue filesysteminfo (dirdir.getfilesysteminfo

20、s(); while (folders.count 0) filesysteminfo tmp = folders.dequeue(); fileinfo f = tmp as fileinfo; if (f = null) directoryinfo d = tmp as directoryinfo; directoryinfo dpath = new directoryinfo(d.fullname.replace(parent.lastindexof(path.directoryseparatorchar) = parent.length - 1) ? parent : parent +

21、 path.directoryseparatorchar, %2); dpath.create(); foreach (filesysteminfo fi in d.getfilesysteminfos() folders.enqueue(fi); else f.moveto(f.fullname.replace(parent, %2); dirdir.delete(true); 17.以一个文件夹的框架在另一个名目创建文件夹和空文件 /* using system.io; using system.collections; */ bool b=false; string path = (%2.lastindexof(path.directoryseparatorchar) = %2.length - 1) ? %2 : %2 + path.directorysepara