The most complete file and directory operations
Sources of information are not easy.
1. Detecting the existence of a specified directory
public static class DirFile
{
/// <summary>
/// Detecting the existence of a specified directory
/// </summary>
/// <param name="directoryPath">absolute path of directory </param>
/// <returns></returns>
public static bool IsExistDirectory(string directoryPath)
{
return Directory.Exists(directoryPath);
}
2. Get a list of all files in the specified directory
/// <summary>
/// Gets a list of all files in the specified directory
/// </summary>
/// <param name="directoryPath">Absolute path of specified directory </param>
public static string[] GetFileNames(string directoryPath)
{
//If the directory does not exist, an exception is thrown
if (!IsExistDirectory(directoryPath))
{
throw new FileNotFoundException();
}
//Get a list of files
return Directory.GetFiles(directoryPath);
}
3. Get a list of all subdirectories in the specified directory
/// <summary>
/// Gets a list of all subdirectories in the specified directory. To search for nested subdirectory lists, use the overload method
/// </summary>
/// <param name="directoryPath">Absolute path of specified directory </param>
public static string[] GetDirectories(string directoryPath)
{
try
{
return Directory.GetDirectories(directoryPath);
}
catch (IOException ex)
{
throw ex;
}
}
4. Get a list of all files in the specified directory and subdirectory
/// <summary>
/// Gets a list of all files in the specified directory and subdirectory
/// </summary>
/// <param name="directoryPath">Absolute path of specified directory </param>
public static string[] GetFileNames(string directoryPath, string searchPattern, bool isSearchChild)
{
//If the directory does not exist, an exception is thrown
if (!IsExistDirectory(directoryPath))
{
throw new FileNotFoundException();
}
try
{
if (isSearchChild)
{
return Directory.GetFiles(directoryPath, searchPattern, SearchOption.AllDirectories);
}
else
{
return Directory.GetFiles(directoryPath, searchPattern, SearchOption.TopDirectoryOnly);
}
}
catch (IOException ex)
{
throw ex;
}
}5. Detecting whether the specified directory is empty
/// <summary>
/// Check whether the specified directory is empty
/// </summary>
/// <param name="directoryPath">Absolute path of specified directory </param>
public static bool IsEmptyDirectory(string directoryPath)
{
try
{
//Determine whether a document exists
string[] fileNames = GetFileNames(directoryPath);
if (fileNames.Length > 0)
{
return false;
}
//Determine whether a folder exists
string[] directoryNames = GetDirectories(directoryPath);
if (directoryNames.Length > 0)
{
return false;
}
return true;
}
catch
{
return true;
}
}6. Detect the existence of the specified file in the specified directory
/// <summary>
/// Detection of the existence of a specified file in a specified directory
/// </summary>
/// <param name="directoryPath">Absolute path of specified directory </param>
public static bool Contains(string directoryPath, string searchPattern)
{
try
{
//Gets the specified list of files
string[] fileNames = GetFileNames(directoryPath, searchPattern, false);
//Determine whether the specified file exists
if (fileNames.Length == 0)
{
return false;
}
else
{
return true;
}
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}7. Create directories
/// <summary>
/// Create directories
/// </summary>
/// <param name="dir">The directory path to be created includes directory name </param>
public static void CreateDir(string dir)
{
if (dir.Length == 0) return;
if (!Directory.Exists(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir))
Directory.CreateDirectory(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir);
}8. Delete directories
/// <summary>
/// Delete directories
/// </summary>
/// <param name="dir">directory path and name to delete </param>
public static void DeleteDir(string dir)
{
if (dir.Length == 0) return;
if (Directory.Exists(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir))
Directory.Delete(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir);
}9. Delete files
/// <summary>
/// Delete files
/// </summary>
/// <param name="file">the path and name of the file to be deleted </param>
public static void DeleteFile(string file)
{
if (File.Exists(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + file))
File.Delete(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + file);
}10. Create files
/// <summary>
/// Create files
/// </summary>
/// <param name="dir">File name with suffix </param>
/// <param name="pagestr">file content </param>
public static void CreateFile(string dir, string pagestr)
{
dir = dir.Replace("/", "\\");
if (dir.IndexOf("\\") > -1)
CreateDir(dir.Substring(0, dir.LastIndexOf("\\")));
System.IO.StreamWriter sw = new System.IO.StreamWriter(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir, false, System.Text.Encoding.GetEncoding("Opp"));
sw.Write(pagestr);
sw.Close();
}11. Mobile files
/// <summary>
/// Move files (clip-paste)
/// </summary>
/// <param name="dir1">the path and full name of the file to be moved (including suffix)</param>
/// <param name="dir2"> move the file to a new location and specify a new file name </param>.
public static void MoveFile(string dir1, string dir2)
{
dir1 = dir1.Replace("/", "\\");
dir2 = dir2.Replace("/", "\\");
if (File.Exists(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir1))
File.Move(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir1, System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir2);
}12. Replication of documents
/// <summary>
/// Copy files
/// </summary>
/// <param name="dir1"> The path of the file to be copied has its full name (including suffix)</param>.
/// <param name="dir2"> target location, and specify a new file name </param>
public static void CopyFile(string dir1, string dir2)
{
dir1 = dir1.Replace("/", "\\");
dir2 = dir2.Replace("/", "\\");
if (File.Exists(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir1))
{
File.Copy(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir1, System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir2, true);
}
}13. Get directory names by time: YYYY-MM-DD
/// <summary>
/// Get the directory name YYYY-MM-DD according to the time
/// </summary>
/// <returns></returns>
public static string GetDateDir()
{
return DateTime.Now.ToString("YYYY-MM-DD");
}14. File name format based on time: hh-mm-ss-ff
/// <summary>
/// get the file name hh-mm-ss-ff according to the time
/// </summary>
/// <returns></returns>
public static string GetDateFile()
{
return DateTime.Now.ToString("hh-mm-ss-ff");
}15. Copy folders
/// <summary>
/// Copy folders
/// </summary>
/// <param name="varFromDirectory">source folder path </param>
/// <param name="varToDirectory">Target folder path </param>
public static void CopyFolder(string varFromDirectory, string varToDirectory)
{
Directory.CreateDirectory(varToDirectory);
if (!Directory.Exists(varFromDirectory)) return;
string[] directories = Directory.GetDirectories(varFromDirectory);
if (directories.Length > 0)
{
foreach (string d in directories)
{
CopyFolder(d, varToDirectory + d.Substring(d.LastIndexOf("\\")));
}
}
string[] files = Directory.GetFiles(varFromDirectory);
if (files.Length > 0)
{
foreach (string s in files)
{
File.Copy(s, varToDirectory + s.Substring(s.LastIndexOf("\\")), true);
}
}
}16. Inspection of documents
/// <summary>
/// Check the file and create it if it does not exist
/// Create if the file does not exist!
/// </summary>
/// <param name="FilePath"> path, including file name </param>
public static void ExistsFile(string FilePath)
{
if (!File.Exists(FilePath))
{
FileStream fs = File.Create(FilePath);
fs.Close();
}
}17. Delete files in specified folders corresponding to other folders
/// <summary>
/// Delete files in specified folders corresponding to other folders
/// </summary>
/// <param name="varFromDirectory">Specified folder path </param>
/// <param name="varToDirectory">corresponding to other folder paths </param>
public static void DeleteFolderFiles(string varFromDirectory, string varToDirectory)
{
Directory.CreateDirectory(varToDirectory);
if (!Directory.Exists(varFromDirectory)) return;
string[] directories = Directory.GetDirectories(varFromDirectory);
if (directories.Length > 0)
{
foreach (string d in directories)
{
DeleteFolderFiles(d, varToDirectory + d.Substring(d.LastIndexOf("\\")));
}
}
string[] files = Directory.GetFiles(varFromDirectory);
if (files.Length > 0)
{
foreach (string s in files)
{
File.Delete(varToDirectory + s.Substring(s.LastIndexOf("\\")));
}
}
}18. Get the file name from the absolute path of the file
/// <summary>
/// Get the file name (including extension) from the absolute path of the file
/// </summary>
/// <param name="filePath">Absolute path of file </param>
public static string GetFileName(string filePath)
{
//Get the name of the file
FileInfo fi = new FileInfo(filePath);
return fi.Name;
}19. Create a directory
/// <summary>
/// Create a directory
/// </summary>
/// <param name="directoryPath">absolute path of directory </param>
public static void CreateDirectory(string directoryPath)
{
//Create a directory if it does not exist
if (!IsExistDirectory(directoryPath))
{
Directory.CreateDirectory(directoryPath);
}
}20. Create a file
/// <summary>
/// Create a file
/// </summary>
/// <param name="filePath">Absolute path of file </param>
public static void CreateFile(string filePath)
{
try
{
//Create a file if it does not exist
if (!IsExistFile(filePath))
{
//Create a FileInfo object
FileInfo file = new FileInfo(filePath);
//create a file
FileStream fs = file.Create();
//Close the file stream
fs.Close();
}
}
catch (Exception ex)
{
throw ex;
}
}21. Number of rows to obtain text files
/// <summary>
/// Get the number of lines of a text file
/// </summary>
/// <param name="filePath">Absolute path of file </param>
public static int GetLineCount(string filePath)
{
//Read the lines of a text file into an array of strings
string[] rows = File.ReadAllLines(filePath);
//Number of rows returned
return rows.Length;
}22. Get the length of a file
/// <summary>
/// Get the length of a file in Byte
/// </summary>
/// <param name="filePath">Absolute path of file </param>
public static int GetFileSize(string filePath)
{
//Create a file object
FileInfo fi = new FileInfo(filePath);
//Get the size of the file
return (int)fi.Length;
}23. Gets a list of subdirectories in a specified directory
/// <summary>
/// Gets a list of all subdirectories in the specified directory and subdirectory
/// </summary>
/// <param name="directoryPath">Absolute path of specified directory </param>
public static string[] GetDirectories(string directoryPath, string searchPattern, bool isSearchChild)
{
try
{
if (isSearchChild)
{
return Directory.GetDirectories(directoryPath, searchPattern, SearchOption.AllDirectories);
}
else
{
return Directory.GetDirectories(directoryPath, searchPattern, SearchOption.TopDirectoryOnly);
}
}
catch (IOException ex)
{
throw ex;
}
}24. Write content to a text file
/// <summary>
/// Write content to a text file
/// </summary>
/// <param name="filePath">Absolute path of file </param>
/// <param name="text">Written content </param>
public static void WriteText(string filePath, string text, Encoding encoding)
{
//Write content to a file
File.WriteAllText(filePath, text, encoding);
}25. Adding content to the end of a text file
/// <summary>
/// Adding content to the end of a text file
/// </summary>
/// <param name="filePath">Absolute path of file </param>
/// <param name="content">Written content</param>
public static void AppendText(string filePath, string content)
{
File.AppendAllText(filePath, content);
}26. Copy the contents of existing files to new files
/// <summary>
/// Copy the contents of the source file to the target file
/// </summary>
/// <param name="sourceFilePath">absolute path of source file </param>
/// <param name="destFilePath">Absolute path of target file </param>
public static void Copy(string sourceFilePath, string destFilePath)
{
File.Copy(sourceFilePath, destFilePath, true);
}27. Move files to a specified directory
/// <summary>
/// Move the file to the specified directory
/// </summary>
/// <param name="sourceFilePath">Absolute path of source file to be moved </param>
/// <param name="descDirectoryPath">The absolute path to the directory moved to </param>
public static void Move(string sourceFilePath, string descDirectoryPath)
{
//Get the name of the source file
string sourceFileName = GetFileName(sourceFilePath);
if (IsExistDirectory(descDirectoryPath))
{
//If there is a file with the same name in the target, delete it
if (IsExistFile(descDirectoryPath + "\\" + sourceFileName))
{
DeleteFile(descDirectoryPath + "\\" + sourceFileName);
}
//Move the file to the specified directory
File.Move(sourceFilePath, descDirectoryPath + "\\" + sourceFileName);
}
}28. Get the file name from the absolute path of the file (no extension included)
/// <summary>
/// Get the file name from the absolute path of the file (no extension included)
/// </summary>
/// <param name="filePath">Absolute path of file </param>
public static string GetFileNameNoExtension(string filePath)
{
//Get the name of the file
FileInfo fi = new FileInfo(filePath);
return fi.Name.Split('.')[0];
}29. Get the extension from the absolute path of the file
/// <summary>
/// Get the extension from the absolute path of the file
/// </summary>
/// <param name="filePath">Absolute path of file </param>
public static string GetExtension(string filePath)
{
//Get the name of the file
FileInfo fi = new FileInfo(filePath);
return fi.Extension;
}30. Clear the designated directory
/// <summary>
/// Clear all files and subdirectories in the specified directory, but the directory is still saved
/// </summary>
/// <param name="directoryPath">Absolute path of specified directory </param>
public static void ClearDirectory(string directoryPath)
{
if (IsExistDirectory(directoryPath))
{
//Delete all files in the directory
string[] fileNames = GetFileNames(directoryPath);
for (int i = 0; i < fileNames.Length; i++)
{
DeleteFile(fileNames);
}
//Delete all subdirectories in a directory
string[] directoryNames = GetDirectories(directoryPath);
for (int i = 0; i < directoryNames.Length; i++)
{
DeleteDirectory(directoryNames);
}
}
}31. Clearing up the contents of documents
/// <summary>
/// Clean up the contents of documents
/// </summary>
/// <param name="filePath">Absolute path of file </param>
public static void ClearFile(string filePath)
{
//Delete files
File.Delete(filePath);
//Recreate the file
CreateFile(filePath);
}32. Delete the specified directory
/// <summary>
/// Delete the specified directory and all its subdirectories
/// </summary>
/// <param name="directoryPath">Absolute path of specified directory </param>
public static void DeleteDirectory(string directoryPath)
{
if (IsExistDirectory(directoryPath))
{
Directory.Delete(directoryPath, true);
}
}
In fact, I am afraid of what I will encounter in the future, but it is difficult to solve, so this blog appeared.
Welcome guidance on what went wrong.