C # file and folder operations

// 1. Create, move, and delete folders ---------
// Create a folder
Directory. createdirectory (server. mappath (""));
Directory. createdirectory (server. mappath ("B "));
Directory. createdirectory (server. mappath ("C "));
// Move B to
Directory. Move (server. mappath ("B"), server. mappath ("A \ B "));
// Delete C
Directory. Delete (server. mappath ("C "));

// 2. Create, copy, move, and delete a file ---------
// Create a file
// When file. Create is used to create, copy, move, or delete a file, the system prompts that the file is being used by another process, so the process cannot access the file.
// Use filestream to retrieve the system. Io. filestream returned by file. Create and disable it.
Filestream FS;
FS = file. Create (server. mappath ("a.txt "));
FS. Close ();
FS = file. Create (server. mappath ("B .txt "));
FS. Close ();
FS = file. Create (server. mappath ("c.txt "));
FS. Close ();
// Copy an object
File. Copy (server. mappath ("a.txt"), server. mappath ("A \ a.txt "));
// Move the file
File. Move (server. mappath ("B .txt"), server. mappath ("A \ B .txt "));
File. Move (server. mappath ("c.txt"), server. mappath ("A \ c.txt "));
// Delete an object
File. Delete (server. mappath ("a.txt "));

// 3. traverse the files and subfolders in the folder and display their attributes ---------
If (directory. exists (server. mappath ("")))
{
// All subfolders
Foreach (string item in directory. getdirectories (server. mappath ("")))
{
Response. Write ("<B> Folder:" + item + "</B> <br/> ");
Directoryinfo = new directoryinfo (item );
Response. Write ("name:" + directoryinfo. Name + "<br/> ");
Response. Write ("Path:" + directoryinfo. fullname + "<br/> ");
Response. Write ("creation time:" + directoryinfo. creationtime + "<br/> ");
Response. Write ("last access time:" + directoryinfo. lastaccesstime + "<br/> ");
Response. Write ("last modification time:" + directoryinfo. lastwritetime + "<br/> ");
Response. Write ("parent folder:" + directoryinfo. Parent + "<br/> ");
Response. Write ("root directory:" + directoryinfo. Root + "<br/> ");
Response. Write ("<br/> ");
}

// All sub-Files
Foreach (string item in directory. getfiles (server. mappath ("")))
{
Response. Write ("<B> file:" + item + "</B> <br/> ");
Fileinfo = new fileinfo (item );
Response. Write ("name:" + fileinfo. Name + "<br/> ");
Response. Write ("Extension:" + fileinfo. Extension + "<br/> ");
Response. Write ("Path:" + fileinfo. fullname + "<br/> ");
Response. Write ("Size:" + fileinfo. Length + "<br/> ");
Response. Write ("creation time:" + fileinfo. creationtime + "<br/> ");
Response. Write ("last access time:" + fileinfo. lastaccesstime + "<br/> ");
Response. Write ("last modification time:" + fileinfo. lastwritetime + "<br/> ");
Response. Write ("folder:" + fileinfo. directoryname + "<br/> ");
Response. Write ("file attributes:" + fileinfo. Attributes + "<br/> ");
Response. Write ("<br/> ");
}
}
// 4. file read/write ---------
If (file. exists (server. mappath ("A \ a.txt ")))
{
Streamwriter streamwrite = new streamwriter (server. mappath ("A \ a.txt "));
Streamwrite. writeline ("wooden house ");
Streamwrite. writeline ("http://www.mzwu.com /");
Streamwrite. Write ("2008-04-13 ");
Streamwrite. Close ();

Streamreader = new streamreader (server. mappath ("A \ a.txt "));
Response. Write (streamreader. Readline ());
Response. Write (streamreader. readtoend ());
Streamreader. Close ();
}