FileInfo클래스와 DirectoryInfo클래스

FileInfo 클래스와 DirectoryInfo 클래스

1. FileInfo클래스

파일 정보를 담을 수 있는 멤버들을 제공한다.

예를들어

Name이란 변수엔 파일이름이

FullName이라는 변수엔 디렉토리 Path를 포함한 파일 이름이,

Extension에는 확장자가,

CreationTime에는 파일이 생성된 날짜 등 각종 파일에 관련된 정보들이 들어간다.

 

생성자에는 파일의 FullPath가 들어간다 (당연히 디렉토리까지 포함)

FileInfo fInfo = new FileInfo("c:\\test.txt");

간단하다.

fInfo.Name에는 “test.txt”가,

fInfo.FullName에는 “c:\\test.txt” 가 들어가있겠지…

 

FileInfo의 모든 멤버는 다음과 같다.

Name	Description
Attributes	Gets or sets the FileAttributes of the current FileSystemInfo. (Inherited from FileSystemInfo.)
CreationTime	Gets or sets the creation time of the current FileSystemInfo object. (Inherited from FileSystemInfo.)
CreationTimeUtc	Gets or sets the creation time, in coordinated universal time (UTC), of the current FileSystemInfo object. (Inherited from FileSystemInfo.)
Directory	Gets an instance of the parent directory.
DirectoryName	Gets a string representing the directory's full path.
Exists	Gets a value indicating whether a file exists. (Overrides FileSystemInfo..::.Exists.)
Extension	Gets the string representing the extension part of the file. (Inherited from FileSystemInfo.)
FullName	Gets the full path of the directory or file. (Inherited from FileSystemInfo.)
IsReadOnly	Gets or sets a value that determines if the current file is read only.
LastAccessTime	Gets or sets the time the current file or directory was last accessed. (Inherited from FileSystemInfo.)
LastAccessTimeUtc	Gets or sets the time, in coordinated universal time (UTC), that the current file or directory was last accessed. (Inherited from FileSystemInfo.)
LastWriteTime	Gets or sets the time when the current file or directory was last written to. (Inherited from FileSystemInfo.)
LastWriteTimeUtc	Gets or sets the time, in coordinated universal time (UTC), when the current file or directory was last written to. (Inherited from FileSystemInfo.)
Length	Gets the size, in bytes, of the current file.
Name	Gets the name of the file. (Overrides FileSystemInfo..::.Name.)

 

아 물론 멤버변수 말고도 파일 생성/ 삭제 등을 할 수 있도록 메서드도 제공한다.

Name	Description
AppendText	Creates a StreamWriter that appends text to the file represented by this instance of the FileInfo.
CopyTo	Overloaded. Copies an existing file to a new file.
Create	Creates a file.
CreateObjRef	Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. (Inherited from MarshalByRefObject.)
CreateText	Creates a StreamWriter that writes a new text file.
Decrypt	Decrypts a file that was encrypted by the current account using the Encrypt method.
Delete	Permanently deletes a file. (Overrides FileSystemInfo..::.Delete()()().)
Encrypt	Encrypts a file so that only the account used to encrypt the file can decrypt it.
Equals	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Finalize	Allows an Object to attempt to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
GetAccessControl	Overloaded. Gets a FileSecurity object that encapsulates the access control list (ACL) entries for the file described by the current FileInfo object.
GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
GetLifetimeService	Retrieves the current lifetime service object that controls the lifetime policy for this instance. (Inherited from MarshalByRefObject.)
GetObjectData	Sets the SerializationInfo object with the file name and additional exception information. (Inherited from FileSystemInfo.)
GetType	Gets the Type of the current instance. (Inherited from Object.)
InitializeLifetimeService	Obtains a lifetime service object to control the lifetime policy for this instance. (Inherited from MarshalByRefObject.)
MemberwiseClone	Overloaded.
MoveTo	Moves a specified file to a new location, providing the option to specify a new file name.
Open	Overloaded. Opens a file with various read/write and sharing privileges.
OpenRead	Creates a read-only FileStream.
OpenText	Creates a StreamReader with UTF8 encoding that reads from an existing text file.
OpenWrite	Creates a write-only FileStream.
Refresh	Refreshes the state of the object. (Inherited from FileSystemInfo.)
Replace	Overloaded. Replaces the contents of a specified file with the file described by the current FileInfo object, deleting the original file, and creating a backup of the replaced file.
SetAccessControl	Applies access control list (ACL) entries described by a FileSecurity object to the file described by the current FileInfo object.
ToString	Returns the path as a string. (Overrides Object..::.ToString()()().)

 

 

2. DirectoryInfo클래스

FileInfo에 파일과 관련된 정보가 담겨있다면 DirectoryInfo클래스에는 Directory에 관한 정보가 들어있을 것이다. FileInfo클래스와 마찬가지로 디렉토리 생성/삭제등을 할 수 있는 메소드를 제공한다.

파일과 다른점은 디렉토리인만큼 하위 파일목록과 하위 디렉토리 목록을 불러오는 메소드를 제공한다는 점이다.

리턴타입은 각각 FileInfo배열과 DirectoryInfo배열이다.

즉 다음과 같이 사용할 수 있다.

 

// C: 루트 디렉토리 정보를 가져옴

DirectoryInfo dInfo = new DirectoryInfo("c:\\");

 

// 하위 FileInfo(파일정보) 배열을 받아옴

FileInfo[] fInfoSub = dInfo.GetFiles();

 

// 하위 DirectoryInfo(디렉토리정보) 배열을 받아옴

DirectoryInfo[] dInfoSub = dInfo.GetDirectories();

 

DirectoryInfo에서 제공하는 멤버는 다음과 같다.

Name	Description
Attributes	Gets or sets the FileAttributes of the current FileSystemInfo. (Inherited from FileSystemInfo.)
CreationTime	Gets or sets the creation time of the current FileSystemInfo object. (Inherited from FileSystemInfo.)
CreationTimeUtc	Gets or sets the creation time, in coordinated universal time (UTC), of the current FileSystemInfo object. (Inherited from FileSystemInfo.)
Exists	Gets a value indicating whether the directory exists. (Overrides FileSystemInfo..::.Exists.)
Extension	Gets the string representing the extension part of the file. (Inherited from FileSystemInfo.)
FullName	Gets the full path of the directory or file. (Inherited from FileSystemInfo.)
LastAccessTime	Gets or sets the time the current file or directory was last accessed. (Inherited from FileSystemInfo.)
LastAccessTimeUtc	Gets or sets the time, in coordinated universal time (UTC), that the current file or directory was last accessed. (Inherited from FileSystemInfo.)
LastWriteTime	Gets or sets the time when the current file or directory was last written to. (Inherited from FileSystemInfo.)
LastWriteTimeUtc	Gets or sets the time, in coordinated universal time (UTC), when the current file or directory was last written to. (Inherited from FileSystemInfo.)
Name	Gets the name of this DirectoryInfo instance. (Overrides FileSystemInfo..::.Name.)
Parent	Gets the parent directory of a specified subdirectory.
Root	Gets the root portion of a path.

 

그리고 메소드는 다음과 같다.

Name	Description
Create	Overloaded. Creates a directory.
CreateObjRef	Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. (Inherited from MarshalByRefObject.)
CreateSubdirectory	Overloaded. Creates a subdirectory or subdirectories on the specified path. The specified path can be relative to this instance of the DirectoryInfo class.
Delete	Overloaded. Deletes a DirectoryInfo and its contents from a path.
Equals	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Finalize	Allows an Object to attempt to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
GetAccessControl	Overloaded. Gets the access control list (ACL) entries for the current directory.
GetDirectories	Overloaded. Returns the subdirectories of the current directory.
GetFiles	Overloaded. Returns a file list from the current directory.
GetFileSystemInfos	Overloaded. Retrieves an array of strongly typed FileSystemInfo objects representing files and subdirectories of the current directory.
GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
GetLifetimeService	Retrieves the current lifetime service object that controls the lifetime policy for this instance. (Inherited from MarshalByRefObject.)
GetObjectData	Sets the SerializationInfo object with the file name and additional exception information. (Inherited from FileSystemInfo.)
GetType	Gets the Type of the current instance. (Inherited from Object.)
InitializeLifetimeService	Obtains a lifetime service object to control the lifetime policy for this instance. (Inherited from MarshalByRefObject.)
MemberwiseClone	Overloaded.
MoveTo	Moves a DirectoryInfo instance and its contents to a new path.
Refresh	Refreshes the state of the object. (Inherited from FileSystemInfo.)
SetAccessControl	Applies access control list (ACL) entries described by a DirectorySecurity object to the directory described by the current DirectoryInfo object.
ToString	Returns the original path that was passed by the user. (Overrides Object..::.ToString()()().)

 

각각의 사용법과 내용은 참고하면 되겠다.