转http://skybirdzw.blog.163.com/blog/static/7257062620099751329403/
文件处理-Directory类 (C#)
Directory.CreateDirectory 方法：创建指定路径中的所有目录。
Directory.CreateDirectory (String) 按 path 的指定创建所有目录和子目录。
Directory.CreateDirectory (String, DirectorySecurity) 创建指定路径中的所有目录，并应用指定的 Windows 安全性。
//***************codeTest**************************************
using System;
using System.IO;
class Test
{
public static void Main()
{
// Specify the directory you want to manipulate.
string path = @"c:MyDirMyDoc";
try
{
// Determine whether the directory exists.
if (Directory.Exists(path))
{
Console.WriteLine("That path exists already.");
return;
}
// Try to create the directory.
DirectoryInfo di = Directory.CreateDirectory(path);
Console.WriteLine("The directory was created successfully at {0}.", Directory.GetCreationTime(path));
// Delete the directory.
//di.Delete();
Console.WriteLine("The directory was deleted successfully.");
}
catch (Exception e)
{
Console.WriteLine("The process failed: {0}", e.ToString());
}
finally { }
}
}
//***************endCode**************************************
Directory.Delete 方法：删除指定的目录。
Directory.Delete (String) 从指定路径删除空目录。
Directory.Delete (String, Boolean) 删除指定的目录并（如果指示）删除该目录中的任何子目录。
//***************codeTest**************************************
using System;
using System.IO;
class Test
{
public static void Main()
{
// Specify the directories you want to manipulate.
string path = @"c:MyDir";
string subPath = @"c:MyDir emp";
try
{
// Determine whether the directory exists.
if (!Directory.Exists(path))
{
// Create the directory.
Directory.CreateDirectory(path);
}
if (!Directory.Exists(subPath))
{
// Create the directory.
Directory.CreateDirectory(subPath);
}
// This will succeed because subdirectories are being deleted.
Console.WriteLine("I am about to attempt to delete {0}", path);
Directory.Delete(path, true);
Console.WriteLine("The Delete operation was successful.");
}
catch (Exception e)
{
Console.WriteLine("The process failed: {0}", e.ToString());
}
finally { }
}
}
//***************endCode**************************************
Directory.Exists 方法：确定给定路径是否引用磁盘上的现有目录。
Directory.GetCreationTime 方法：获取目录的创建日期和时间。
//***************codeTest**************************************
using System;
using System.IO;
class Test
{
public static void Main()
{
try
{
// Get the creation time of a well-known directory.
DateTime dt = Directory.GetCreationTime(Environment.CurrentDirectory);
// Give feedback to the user.
if (DateTime.Now.Subtract(dt).TotalDays > 364)
{
Console.WriteLine("This directory is over a year old.");
}
else if (DateTime.Now.Subtract(dt).TotalDays > 30)
{
Console.WriteLine("This directory is over a month old.");
}
else if (DateTime.Now.Subtract(dt).TotalDays <= 1)
{
Console.WriteLine("This directory is less than a day old.");
}
else
{
Console.WriteLine("This directory was created on {0}", dt);
}
}
catch (Exception e)
{
Console.WriteLine("The process failed: {0}", e.ToString());
}
}
}
//***************endCode**************************************
Directory.GetCurrentDirectory 方法：获取应用程序的当前工作目录。
//***************codeTest**************************************
using System;
using System.IO;
class Test
{
public static void Main()
{
try
{
// Get the current directory.
string path = Directory.GetCurrentDirectory();
string target = @"c: emp";
Console.WriteLine("The current directory is {0}", path);
if (!Directory.Exists(target))
{
Directory.CreateDirectory(target);
}
// Change the current directory.
Environment.CurrentDirectory = (target);
if (path.Equals(Directory.GetCurrentDirectory()))
{
Console.WriteLine("You are in the temp directory.");
}
else
{
Console.WriteLine("You are not in the temp directory.");
}
}
catch (Exception e)
{
Console.WriteLine("The process failed: {0}", e.ToString());
}
}
}
//***************endCode**************************************
Directory.GetDirectories 方法：获取指定目录中子目录的名称。
Directory.GetDirectories (String) 获取指定目录中子目录的名称。
Directory.GetDirectories (String, String) 从当前目录获取与指定搜索模式匹配的目录的数组。
Directory.GetDirectories (String, String, SearchOption) 获取当前目录中与指定搜索模式匹配并使用某个值确定是否在子目录中搜索的目录的数组。
//***************codeTest**************************************
using System;
using System.IO;
class SubDir
{
public static void Main()
{
string path = @"F:课件通信原理";
try
{
string[] dirs = Directory.GetDirectories(path);
Console.WriteLine("F:\课件\通信原理 子目录数 = {0}", dirs.Length);
foreach (string dir in dirs)
Console.WriteLine(dir);
}
catch (Exception e)
{
Console.WriteLine("失败： {0}", e.ToString());
}
}
}
//***************endCode**************************************
//***************codeTest**************************************
using System;
using System.IO;
class Test
{
public static void Main()
{
try
{
// Only get subdirectories that begin with the letter "p."
string[] dirs = Directory.GetDirectories(@"c:", "p*");
Console.WriteLine("The number of directories starting with p is {0}.", dirs.Length);
foreach (string dir in dirs)
{
Console.WriteLine(dir);
}
}
catch (Exception e)
{
Console.WriteLine("The process failed: {0}", e.ToString());
}
}
}
//***************endCode**************************************
Directory.GetFiles 方法：返回指定目录中的文件的名称。
Directory.GetFiles (String) 返回指定目录中的文件的名称。
Directory.GetFiles (String, String) 返回指定目录中与指定搜索模式匹配的文件的名称。
Directory.GetFiles (String, String, SearchOption) 返回指定目录中文件的名称，该目录与指定搜索模式匹配并使用某个值确定是否在子目录中搜索。
//***************codeTest**************************************
using System;
using System.IO;
class Test
{
public static void Main()
{
try
{
// Only get files that begin with the letter "c."
string[] dirs = Directory.GetFiles(@"F:memo","*.txt");
Console.WriteLine("The number of files starting with c is {0}.", dirs.Length);
foreach (string dir in dirs)
{
Console.WriteLine(dir);
}
}
catch (Exception e)
{
Console.WriteLine("The process failed: {0}", e.ToString());
}
}
}
//***************endCode**************************************
Directory.GetFileSystemEntries 方法：返回指定目录中所有文件和子目录的名称。
Directory.GetFileSystemEntries (String) 返回指定目录中所有文件和子目录的名称。
Directory.GetFileSystemEntries (String, String) 返回与指定搜索条件匹配的文件系统项的数组。
Directory.Move 方法：将文件或目录及其内容移到新位置。
//***************codeTest**************************************
using System;
using System.IO;
class Test
{
public static void Main()
{
try
{
string path = @"F:memo";
string path2 = @"F:VC++串口通讯memo";
Directory.Move(path, path2);
}
catch (Exception e)
{
Console.WriteLine("The process failed: {0}", e.ToString());
}
}
}
//***************endCode**************************************
举 例来讲，如果您尝试将 c:mydir 移到 c:public，并且 c:public 已存在，则此方法引发 IOException。您必须将“c:\public\mydir”指定为 destDirName 参数（假设“c:\public”下不存在“mydir”），或者指定一个新的目录名，例如“c:\newdir”。
//***************codeTest**************************************
using System;
namespace GetFileSystemEntries
{
class Class1
{
static void Main(string[] args)
{
Class1 snippets = new Class1();
string path = System.IO.Directory.GetCurrentDirectory();
string filter = "*.exe";
snippets.PrintFileSystemEntries(path);
snippets.PrintFileSystemEntries(path, filter);
snippets.GetLogicalDrives();
snippets.GetParent(path);
snippets.Move("C:\proof", "C:\Temp");
}
void PrintFileSystemEntries(string path)
{
try
{
// Obtain the file system entries in the directory path.
string[] directoryEntries =
System.IO.Directory.GetFileSystemEntries(path);
foreach (string str in directoryEntries)
{
System.Console.WriteLine(str);
}
}
catch (ArgumentNullException)
{
System.Console.WriteLine("Path is a null reference.");
}
catch (System.Security.SecurityException)
{
System.Console.WriteLine("The caller does not have the " +
"required permission.");
}
catch (ArgumentException)
{
System.Console.WriteLine("Path is an empty string, " +
"contains only white spaces, " +
"or contains invalid characters.");
}
catch (System.IO.DirectoryNotFoundException)
{
System.Console.WriteLine("The path encapsulated in the " +
"Directory object does not exist.");
}
}
void PrintFileSystemEntries(string path, string pattern)
{
try
{
// Obtain the file system entries in the directory
// path that match the pattern.
string[] directoryEntries =
System.IO.Directory.GetFileSystemEntries(path, pattern);
foreach (string str in directoryEntries)
{
System.Console.WriteLine(str);
}
}
catch (ArgumentNullException)
{
System.Console.WriteLine("Path is a null reference.");
}
catch (System.Security.SecurityException)
{
System.Console.WriteLine("The caller does not have the " +
"required permission.");
}
catch (ArgumentException)
{
System.Console.WriteLine("Path is an empty string, " +
"contains only white spaces, " +
"or contains invalid characters.");
}
catch (System.IO.DirectoryNotFoundException)
{
System.Console.WriteLine("The path encapsulated in the " +
"Directory object does not exist.");
}
}
// Print out all logical drives on the system.
void GetLogicalDrives()
{
try
{
string[] drives = System.IO.Directory.GetLogicalDrives();
foreach (string str in drives)
{
System.Console.WriteLine(str);
}
}
catch (System.IO.IOException)
{
System.Console.WriteLine("An I/O error occurs.");
}
catch (System.Security.SecurityException)
{
System.Console.WriteLine("The caller does not have the " +
"required permission.");
}
}
void GetParent(string path)
{
try
{
System.IO.DirectoryInfo directoryInfo =
System.IO.Directory.GetParent(path);
System.Console.WriteLine(directoryInfo.FullName);
}
catch (ArgumentNullException)
{
System.Console.WriteLine("Path is a null reference.");
}
catch (ArgumentException)
{
System.Console.WriteLine("Path is an empty string, " +
"contains only white spaces, or " +
"contains invalid characters.");
}
}
void Move(string sourcePath, string destinationPath)
{
try
{
System.IO.Directory.Move(sourcePath, destinationPath);
System.Console.WriteLine("The directory move is complete.");
}
catch (ArgumentNullException)
{
System.Console.WriteLine("Path is a null reference.");
}
catch (System.Security.SecurityException)
{
System.Console.WriteLine("The caller does not have the " +
"required permission.");
}
catch (ArgumentException)
{
System.Console.WriteLine("Path is an empty string, " +
"contains only white spaces, " +
"or contains invalid characters.");
}
catch (System.IO.IOException)
{
System.Console.WriteLine("An attempt was made to move a " +
"directory to a different " +
"volume, or destDirName " +
"already exists.");
}
}
}
}
//***************endCode**************************************
Notice: Codes were mainly from MSDN