. NET instance method for creating, deleting, and copying folders and Their subfiles

Copy codeThe Code is as follows: using System;

Using System. Collections. Generic;

Using System. Linq;

Using System. Text;

Using System. IO;

Namespace WinFormsApp_OperateFileAndFolder

{

Public class OperateFileFolder

{

/// <Summary>

/// Create a folder

/// </Summary>

Public string CreateFolder (string argPath)

{

String returnStr = "";

Try

{

If (System. IO. Directory. Exists (argPath ))

{

ReturnStr = "this folder already exists ";

Return returnStr;

}

Else

{

System. IO. DirectoryInfo dirinfo = System. IO. Directory. CreateDirectory (argPath );

ReturnStr = "this folder is created successfully! Creation Time: "+ System. IO. Directory. GetCreationTime (argPath );

}

}

Catch (Exception ee)

{

ReturnStr = "processing failed! Cause of failure: "+ ee. ToString ();

}

Return returnStr;

}

/// <Summary>

/// Recursively delete folders and files

/// </Summary>

/// <Param name = "dir"> </param>

Public void DeleteFolder (string dir)

{

// Cancel blocking. After this method is executed, you can keep the root folder (only delete all the sub-folders in the directory)

//// Check whether the target directory ends with a directory delimiter. If not, add it.

// If (dir [dir. Length-1]! = Path. DirectorySeparatorChar)

// Dir + = Path. DirectorySeparatorChar;

If (Directory. Exists (dir) // if this folder Exists, delete it

{

Foreach (string d in Directory. GetFileSystemEntries (dir ))

{

If (File. Exists (d ))

File. Delete (d); // Delete the File directly.

Else

DeleteFolder (d); // recursively Delete subfolders

}

Directory. Delete (dir); // Delete an empty folder

Console. Write (dir + "folder deleted successfully ");

}

Else

Console. Write (dir + "this folder does not exist"); // If the folder does not exist, a prompt is displayed.

}

/// <Summary>

/// Implement a static method to copy all the content under the specified folder to the target folder

/// If the target folder is read-only, an error is returned.

/// </Summary>

Public static void CopyDir (string srcPath, string aimPath)

{

Try

{

// Check whether the target directory ends with a directory delimiter. If not, add it.

If (aimPath [aimPath. Length-1]! = Path. DirectorySeparatorChar)

AimPath + = Path. DirectorySeparatorChar;

// Determine whether the target directory exists. If it does not exist, create it.

If (! Directory. Exists (aimPath) Directory. CreateDirectory (aimPath );

// Obtain the file list of the source Directory, which is an array containing the file and directory path

// Use the following method if you direct to the file under the copy target file without including the Directory

// String [] fileList = Directory. GetFiles (srcPath );

String [] fileList = Directory. GetFileSystemEntries (srcPath );

// Traverse all files and directories

Foreach (string file in fileList)

{

// Process the file as a directory first. If this directory exists, recursively Copy the file under this directory.

If (Directory. Exists (file ))

CopyDir (file, aimPath + Path. GetFileName (file ));

// Otherwise, Copy the file directly.

Else

File. Copy (file, aimPath + Path. GetFileName (file), true );

}

}

Catch (Exception e)

{

System. Windows. Forms. MessageBox. Show (e. ToString ());

}

}

}

}