1.创建文件夹
Directory.CreateDirectory(%%1);
2.创建文件
File.Create(%%1);
3.删除文件
File.Delete(%%1);
4.删除文件夹
Directory.Delete(%%1);
5.删除一个文件下夹所有的文件夹
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;
Directory.Delete(%%1+”\\”+d.Name);
}
}
}
>> 本文固定链接: http://www.vcgood.com/archives/3143
6.清空文件夹
Directory.Delete(%%1);
Directory.CreateDirectory(%%1);
7.读取文件
StreamReader s = File.OpenText(%%1);
string %%2 = null;
while ((%%2 = s.ReadLine()) != null)
{
%%3
}
s.Close();
8.写入文件
FileInfo f = new FileInfo(%%1);
StreamWriter w = f.CreateText();
w.WriteLine(%%2);
w.Close();
9.写入随机文件
//using System.IO;
// Create random data to write to the file.
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
FileInfo f = new FileInfo(%%1);//f.CreationTime,f.FullName
if((f.Attributes & FileAttributes.ReadOnly) != 0)
{
%%2
}
else
{
%%3
}
11.写入属性
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;
DirectoryInfo dir = new DirectoryInfo(%%1);
FileInfo[] files = dir.GetFiles(“*.*”);
foreach( FileInfo %%2 in files)
{
%%3
}
12.枚举一个文件夹中的所有文件夹
foreach (string %%2 in Directory.GetDirectories(%%1))
{
%%3
}
13.复制文件夹
DirectoryInfo dir = new DirectoryInfo(%%1);
ArrayList folders=new ArrayList();
FileSystemInfo[] fileArr = dir.GetFileSystemInfos();
folders.AddRange(fileArr);
for (int i = 0; i < folders.Count; i++)
{
FileInfo f = folders[i] as FileInfo;
if (f == null)
{
DirectoryInfo d = folders[i] as DirectoryInfo;
Directory.CreateDirectory(%%2+”\\”+d.Name);
folders.AddRange(d.GetFileSystemInfos());
}
else
File.Copy(f.FullName,f.Directory.Name.Replace(%%1,%%2)+”\\”+f.Name);
}
14.复制一个文件夹下所有的文件夹到另一个文件夹下
foreach (string dirStr in Directory.GetDirectories(%%1))
{
DirectoryInfo dir = new DirectoryInfo(dirStr);
ArrayList folders=new ArrayList();
FileSystemInfo[] fileArr = dir.GetFileSystemInfos();
folders.AddRange(fileArr);
for (int i = 0; i < folders.Count; i++)
{
FileInfo f = folders[i] as FileInfo;
if (f == null)
{
DirectoryInfo d = folders[i] as DirectoryInfo;
Directory.CreateDirectory(%%2+”\\”+d.Name);
folders.AddRange(d.GetFileSystemInfos());
}
else
File.Copy(f.FullName,%%2+”\\”+f.Name);
}
}
15.移动文件夹
Directory.Move(%%1,%%2);
15.移动一个文件夹下所有的文件夹到另一个目录下
foreach (string dir in Directory.GetDirectories(%%1))
Directory.Move(dir,%%2);
16.以一个文件夹的框架在另一个目录创建文件夹和空文件
DirectoryInfo dir = new DirectoryInfo(%%1);
ArrayList folders=new ArrayList();
FileSystemInfo[] fileArr = dir.GetFileSystemInfos();
folders.AddRange(fileArr);
for (int i = 0; i < folders.Count; i++)
{
FileInfo f = folders[i] as FileInfo;
if (f == null)
{
DirectoryInfo d = folders[i] as DirectoryInfo;
Directory.CreateDirectory(%%2+”\\”+d.Name);
folders.AddRange(d.GetFileSystemInfos());
}
else
File.Create(%%2+”\\”+f.Name);
}
17.复制文件
File.Copy(%%1,%%2);
18.复制一个文件夹下所有的文件到另一个目录
foreach (string fileStr in Directory.GetFiles(%%1))
File.Copy(%%1+”\\”+fileStr,%%2+”\\”+fileStr);
19.提取扩展名
%%2=Path.GetExtension(%%1);
20.提取文件名
%%2=File.GetName(%%1);
21.提取文件路径
%%2=File.GetParent(%%1);
22.替换扩展名
File.ChangeExtension(%%1,%%2);
23.追加路径
%%3=File.Combine(%%1,%%2);
24.移动文件
File.Move(%%1,%%2+”\\”+File.GetName(%%1));
25.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+”\\”+fileStr,%%2+”\\”+fileStr);
26.指定目录下搜索文件
//using System.Text;
//using System.IO;
public string GetFile(string fileName,string dirName)
{
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”;
}
27.打开对话框
OpenFileDialog openFileDialog=new OpenFileDialog();
openFileDialog.InitialDirectory=\”c:\\\\\”;//注意这里写路径时要用c:\\\\而不是c:\\
openFileDialog.Filter=\”文本文件|*.*|C#文件|*.cs|所有文件|*.*\”;
openFileDialog.RestoreDirectory=true;
openFileDialog.FilterIndex=1;
if (openFileDialog.ShowDialog()==DialogResult.OK)
{
fName=openFileDialog.FileName;
File fileOpen=new File(fName);
isFileHaveName=true;
%%1=fileOpen.ReadFile();
%%1.AppendText(\”\”);
}
28.文件分割
FileStream fsr = new FileStream(%%1, FileMode.Open, FileAccess.Read);
byte[] btArr = new byte[fsr.Length];
fsr.Read(btArr, 0, btArr.Length);
fsr.Close();
string strFileName=%%1.Substring(%%1.LastIndexOf(“\\”)+1);
FileStream fsw = new FileStream(%%2 + strFileName + “1″, FileMode.Create, FileAccess.Write);
fsw.Write(btArr, 0, btArr.Length/2);
fsw.Close();
fsw = new FileStream(%%2 + strFileName + “2″, FileMode.Create, FileAccess.Write);
fsw.Write(btArr, btArr.Length/2, btArr.Length-btArr.Length/2);
fsw.Close();
29.文件合并
string strFileName = %%1.Substring(%%1.LastIndexOf(“\\”) + 1);
FileStream fsr1 = new FileStream(%%2 + strFileName + “1″, FileMode.Open, FileAccess.Read);
FileStream fsr2 = new FileStream(%%2 + strFileName + “2″, FileMode.Open, FileAccess.Read);
byte[] btArr = new byte[fsr1.Length+fsr2.Length];
fsr1.Read(btArr, 0, Convert.ToInt32(fsr1.Length));
fsr2.Read(btArr, Convert.ToInt32(fsr1.Length), Convert.ToInt32(fsr2.Length));
fsr1.Close();fsr2.Close();
FileStream fsw = new FileStream(%%2 + strFileName, FileMode.Create, FileAccess.Write);
fsw.Write(btArr, 0, btArr.Length);
fsw.Close();
30.文件简单加密
//读文件
FileStream fsr = new FileStream(%%1, FileMode.Open, FileAccess.Read);
byte[] btArr = new byte[fsr.Length];
fsr.Read(btArr, 0, btArr.Length);
fsr.Close();
for (int i = 0; i < btArr.Length; i++) //加密
{
int ibt = btArr[i];
ibt += 100;
ibt %= 256;
btArr[i] = Convert.ToByte(ibt);
}
//写文件
string strFileName = Path.GetExtension(%%1);
FileStream fsw = new FileStream(%%2+”/” + “enc_” + strFileName, FileMode.Create, FileAccess.Write);
fsw.Write(btArr, 0, btArr.Length);
fsw.Close();
31.文件简单解密
FileStream fsr = new FileStream(%%1, FileMode.Open, FileAccess.Read);
byte[] btArr = new byte[fsr.Length];
fsr.Read(btArr, 0, btArr.Length);
fsr.Close();
for (int i = 0; i < btArr.Length; i++) //解密
{
int ibt = btArr[i];
ibt -= 100;
ibt += 256;
ibt %= 256;
btArr[i] = Convert.ToByte(ibt);
}
//写文件
string strFileName = Path.GetExtension(%%1);
FileStream fsw = new FileStream(%%2 +”/” + strFileName, FileMode.Create, FileAccess.Write);
fsw.Write(btArr, 0, btArr.Length);
fsw.Close();
32.读取ini文件属性
//[DllImport("kernel32")]//返回0表示失败，非0为成功
//private static extern long WritePrivateProfileString(string section,string key, string val,string filePath);
//[DllImport("kernel32")]//返回取得字符串缓冲区的长度
//private static extern long GetPrivateProfileString(string section,string key, string def,StringBuilder retVal,int size,string filePath);
public static string ReadIniData(string Section,string Key,string NoText,string iniFilePath)
{
if(File.Exists(iniFilePath))
{
StringBuilder temp = new StringBuilder(1024);
GetPrivateProfileString(Section,Key,NoText,temp,1024,iniFilePath);
return temp.ToString();
}
else
{
return String.Empty;
}
}
33.合并一个文件下所有的文件
34.写入ini文件属性
//[DllImport("kernel32")]//返回0表示失败，非0为成功
//private static extern long WritePrivateProfileString(string section,string key, string val,string filePath);
//[DllImport("kernel32")]//返回取得字符串缓冲区的长度
//private static extern long GetPrivateProfileString(string section,string key, string def,StringBuilder retVal,int size,string filePath);
public static bool WriteIniData(string Section,string Key,string Value,string iniFilePath)
{
if(File.Exists(iniFilePath))
{
long OpStation = WritePrivateProfileString(Section,Key,Value,iniFilePath);
if(OpStation == 0)
{
return false;
}
else
{
return true;
}
}
else
{
return false;
}
}
35.获得当前路径
Environment.CurrentDirectory.ToString()
36.读取XML数据库
//using System.Xml;
XmlDocument doc=new XmlDocument();
doc.Load(%%1);
CString %%9;
XmlElement xe=doc.GetElementById(%%7);
XmlNodeList elemList=xe.ChildNodes;
foreach(XmlNode elem in elemList)
{
if(elem.NodeType==%%8)
{
%%9=elem.Value;
break;
}
}
37.写入XML数据库
//using System.Xml;
XmlDocument doc=new XmlDocument();
doc.Load(%%1);
XmlNode root=doc.DocumentElement;
XmlElement book=doc.CreateElement(%%3);
XmlElement book=doc.CreateElement(%%5);
XmlElement port=doc.CreateElement(%%6);
book.SetAttribute(%%4,root.ChildNodes.Count.ToString());
author.InnerText=%%8;
book.appendChild(author);
book.appendChild(port);
root.appendChild(book);
doc.Save(%%1);
38.ZIP压缩文件
//using System.IO;
//using System.IO.Compression;
FileStream infile;
try
{
// Open the file as a FileStream object.
infile = new FileStream(%%1, FileMode.Open, FileAccess.Read, FileShare.Read);
byte[] buffer = new byte[infile.Length];
// Read the file to ensure it is readable.
int count = infile.Read(buffer, 0, buffer.Length);
if (count != buffer.Length)
{
infile.Close();
//Test Failed: Unable to read data from file
return;
}
infile.Close();
MemoryStream ms = new MemoryStream();
// Use the newly created memory stream for the compressed data.
DeflateStream compressedzipStream = new DeflateStream(ms, CompressionMode.Compress, true);
//Compression
compressedzipStream.Write(buffer, 0, buffer.Length);
// Close the stream.
compressedzipStream.Close();
//Original size: {0}, Compressed size: {1}”, buffer.Length, ms.Length);
FileInfo f = new FileInfo(%%2);
StreamWriter w = f.CreateText();
w.Write(buffer,0,ms.Length);
w.Close();
} // end try
catch (InvalidDataException)
{
//Error: The file being read contains invalid data.
}
catch (FileNotFoundException)
{
//Error:The file specified was not found.
}
catch (ArgumentException)
{
//Error: path is a zero-length string, contains only white space, or contains one or more invalid characters
}
catch (PathTooLongException)
{
//Error: The specified path, file name, or both exceed the system-defined maximum length. For example, on Windows-based
platforms, paths must be less than 248 characters, and file names must be less than 260 characters.
}
catch (DirectoryNotFoundException)
{
//Error: The specified path is invalid, such as being on an unmapped drive.
}
catch (IOException)
{
//Error: An I/O error occurred while opening the file.
}
catch (UnauthorizedAccessException)
{
//Error: path specified a file that is read-only, the path is a directory, or caller does not have the required
permissions.
}
catch (IndexOutOfRangeException)
{
//Error: You must provide parameters for MyGZIP.
}
39.ZIP解压缩
//using System.IO;
//using System.IO.Compression;
FileStream infile;
try
{
// Open the file as a FileStream object.
infile = new FileStream(%%1, FileMode.Open, FileAccess.Read, FileShare.Read);
byte[] buffer = new byte[infile.Length];
// Read the file to ensure it is readable.
int count = infile.Read(buffer, 0, buffer.Length);
if (count != buffer.Length)
{
infile.Close();
//Test Failed: Unable to read data from file
return;
}
infile.Close();
MemoryStream ms = new MemoryStream();
// ms.Position = 0;
DeflateStream zipStream = new DeflateStream(ms, CompressionMode.Decompress);
//Decompression
byte[] decompressedBuffer = new byte[buffer.Length *2];
zipStream.Close();
FileInfo f = new FileInfo(%%2);
StreamWriter w = f.CreateText();
w.Write(decompressedBuffer);
w.Close();
} // end try
catch (InvalidDataException)
{
//Error: The file being read contains invalid data.
}
catch (FileNotFoundException)
{
//Error:The file specified was not found.
}
catch (ArgumentException)
{
//Error: path is a zero-length string, contains only white space, or contains one or more invalid characters
}
catch (PathTooLongException)
{
//Error: The specified path, file name, or both exceed the system-defined maximum length. For example, on Windows-based
platforms, paths must be less than 248 characters, and file names must be less than 260 characters.
}
catch (DirectoryNotFoundException)
{
//Error: The specified path is invalid, such as being on an unmapped drive.
}
catch (IOException)
{
//Error: An I/O error occurred while opening the file.
}
catch (UnauthorizedAccessException)
{
//Error: path specified a file that is read-only, the path is a directory, or caller does not have the required
permissions.
}
catch (IndexOutOfRangeException)
{
//Error: You must provide parameters for MyGZIP.
}
40.ZIP压缩文件夹
//using System.IO;
//using System.IO.Compression;
ArrayList list = new ArrayList();
foreach (string f in Directory.GetFiles(%%1))
{
byte[] destBuffer = File.ReadAllBytes(f);
SerializeFileInfo sfi = new SerializeFileInfo(f, destBuffer);
list.Add(sfi);
}
IFormatter formatter = new BinaryFormatter();
using (Stream s = new MemoryStream())
{
formatter.Serialize(s, list);
s.Position = 0;
CreateCompressFile(s, %%2);
}
正在开这项课程 应该看一看啊