C#操作文件之二

1.创建文件夹
//using System.IO;
Directory.CreateDirectory(%%1);

2.创建文件
//using System.IO;
File.Create(%%1);

3.删除文件
//using System.IO;
File.Delete(%%1);

4.删除文件夹
//using System.IO;
Directory.Delete(%%1);

5.删除一个目录下所有的文件夹
//using System.IO;
foreach (string dirStr in Directory.GetDirectories(%%1))
{
DirectoryInfo dir = new DirectoryInfo(dirStr);
ArrayList folders=new ArrayList();
FileSystemInfo[] fileArr = dir.GetFileSystemInfos();
for (int i = 0; i < folders.Count; i++)
{
FileInfo f = folders[i] as FileInfo;
if (f == null)
{
DirectoryInfo d = folders[i] 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
//using System.IO;
StreamReader s = File.OpenText(%%1);
string %%2 = null;
while ((%%2 = s.ReadLine()) != null){
%%3
}
s.Close();

8.写入文件
//using System.IO;
FileInfo f = new FileInfo(%%1);
StreamWriter w = f.CreateText();
w.WriteLine(%%2);
w.Close();

9.写入随机文件
//using System.IO;
byte[] dataArray = new byte[100000];//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(dataArray[i]);
}
// Set the stream position to the beginning of the file.
FileStream.Seek(0, SeekOrigin.Begin);
// Read and verify the data.
for(int i = 0; i < FileStream.Length; i++){
if(dataArray[i] != 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.Attributes & FileAttributes.ReadOnly) != 0){
%%2
}
else{
%%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所有文件夹
//using System.IO;
foreach (string %%2 in Directory.GetDirectories(%%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("\\") == %%2.Length - 1) ? %%2 : %%2+"\\";
string parent = Path.GetDirectoryName(%%1);
Directory.CreateDirectory(path + Path.GetFileName(%%1));
DirectoryInfo dir = new DirectoryInfo((%%1.LastIndexOf("\\") == %%1.Length - 1) ? %%1 : %%1 + "\\");
FileSystemInfo[] fileArr = dir.GetFileSystemInfos();
Queue<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("\\") == parent.Length - 1) ? parent : parent + "\\", path));
foreach (FileSystemInfo fi in d.GetFileSystemInfos())
{
Folders.Enqueue(fi);
}
}
else
{
f.CopyTo(f.FullName.Replace(parent, path));
}
}

14.复制目录下所有的文件夹到另一个文件夹下
/*
using System.IO;
using System.Collections;
*/
DirectoryInfo d = new DirectoryInfo(%%1);
foreach (DirectoryInfo dirs 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 DirectoryInfo;
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 path=(%%2.LastIndexOf("\\") == %%2.Length - 1) ? %%2 : %%2 + "\\";
if (Path.GetPathRoot(%%1) == Path.GetPathRoot(%%2))
Directory.Move(%%1, path + filename);
else
{
string parent = Path.GetDirectoryName(%%1);
Directory.CreateDirectory(path + Path.GetFileName(%%1));
DirectoryInfo dir = new DirectoryInfo((%%1.LastIndexOf("\\") == %%1.Length - 1) ? %%1 : %%1 + "\\");
FileSystemInfo[] fileArr = dir.GetFileSystemInfos();
Queue<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;
DirectoryInfo dpath = new DirectoryInfo(d.FullName.Replace((parent.LastIndexOf("\\") == parent.Length - 1) ? parent : parent + "\\", path));
dpath.Create();
foreach (FileSystemInfo fi in d.GetFileSystemInfos())
{
Folders.Enqueue(fi);
}
}
else
{
f.MoveTo(f.FullName.Replace(parent, path));
}
}
Directory.Delete(%%1, true);
}

16.移动目录下所有的文件夹到另一个目录下
/*
using System.IO;
using System.Collections;
*/
string filename = Path.GetFileName(%%1);
if (Path.GetPathRoot(%%1) == 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 dir = (dir2.LastIndexOf("\\") == dir2.Length - 1) ? dir2 : dir2 + "\\";
DirectoryInfo dirdir = new DirectoryInfo(dir);
FileSystemInfo[] fileArr = dirdir.GetFileSystemInfos();
Queue<FileSystemInfo> Folders = new Queue<FileSystemInfo>(dirdir.GetFileSystemInfos());
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("\\") == parent.Length - 1) ? parent : parent + "\\", %%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目录创建文件夹和空文件
/*
using System.IO;
using System.Collections;
*/
bool b=false;
string path = (%%2.LastIndexOf("\\") == %%2.Length - 1) ? %%2 : %%2 + "\\";
string parent = Path.GetDirectoryName(%%1);
Directory.CreateDirectory(path + Path.GetFileName(%%1));
DirectoryInfo dir = new DirectoryInfo((%%1.LastIndexOf("\\") == %%1.Length - 1) ? %%1 : %%1 + "\\");
FileSystemInfo[] fileArr = dir.GetFileSystemInfos();
Queue<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("\\") == parent.Length - 1) ? parent : parent + "\\", path));
foreach (FileSystemInfo fi in d.GetFileSystemInfos())
{
Folders.Enqueue(fi);
}
}
else
{
if(b) File.Create(f.FullName.Replace(parent, path));
}
}

18.复制文件
//using System.IO;
File.Copy(%%1,%%2);

19.复制一个文件夹下所有的文件到另一个目录
//using System.IO;
foreach (string fileStr in Directory.GetFiles(%%1))
File.Copy((%%1.LastIndexOf("\\") == %%1.Length - 1) ? %%1 +Path.GetFileName(fileStr): %%1 + "\\"+Path.GetFileName(fileStr),(%%2.LastIndexOf("\\") == %%2.Length - 1) ? %%2 +Path.GetFileName(fileStr): %%2 + "\\"+Path.GetFileName(fileStr));

20.提取扩展名
//using System.IO;
string %%2=Path.GetExtension(%%1);

21.提取文件名
//using System.IO;
string %%2=Path.GetFileName(%%1);

22.提取文件路径
//using System.IO;
string %%2=Path.GetDirectoryName(%%1);

23.替换扩展名
//using System.IO;
File.ChangeExtension(%%1,%%2);

24.追加路径
//using System.IO;
string %%3=Path.Combine(%%1,%%2);

25.移动文件
//using System.IO;
File.Move(%%1,%%2+"\\"+file.getname(%%1));

26.移动一个文件夹下所有文件到另一个目录
foreach (string fileStr in Directory.GetFiles(%%1))
File.Move((%%1.LastIndexOf("\\") == %%1.Length - 1) ? %%1 +Path.GetFileName(fileStr): %%1 + "\\"+Path.GetFileName(fileStr),(%%2.LastIndexOf("\\") == %%2.Length - 1) ? %%2 +Path.GetFileName(fileStr): %%2 + "\\"+Path.GetFileName(fileStr));

27.指定目录下搜索文件
/*
using System.Text;
using System.IO;
*/
string fileName=%%1;
string dirName=%%2;
DirectoryInfo dirc=new DirectoryInfo(dirName);
foreach(FileInfo file in dirc.GetFiles()) {
if(file.Name.IndexOf(fileName)>-1)
return file.FullName;
}
foreach(DirectoryInfo dir in dirc.GetDirectories()) {
return GetFile(fileName,dir.FullName);
}
return "找不到指定的文件";
}