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FileSystem Class

.NET Framework 4

Other Versions

Provides properties and methods for working with drives, files, and directories.

Inheritance Hierarchy

System.Object
Microsoft.VisualBasic.FileIO.FileSystem

Namespace: Microsoft.VisualBasic.FileIO
Assembly: Microsoft.VisualBasic (in Microsoft.VisualBasic.dll)

Syntax

C++

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[HostProtectionAttribute(SecurityAction.LinkDemand, Resources = HostProtectionResource.ExternalProcessMgmt)]
public class FileSystem

The FileSystem type exposes the following members.

Constructors

	Name	Description
	FileSystem	Initializes a new instance of the FileSystem class.

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Properties

	Name	Description
	CurrentDirectory	Gets or sets the current directory.
	Drives	Returns a read-only collection of all available drive names.

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Methods

	Name	Description
	CombinePath	Combines two paths and returns a properly formatted path.
	CopyDirectory(String, String)	Copies the contents of a directory to another directory.
	CopyDirectory(String, String, UIOption)	Copies the contents of a directory to another directory.
	CopyDirectory(String, String, Boolean)	Copies the contents of a directory to another directory.
	CopyDirectory(String, String, UIOption, UICancelOption)	Copies the contents of a directory to another directory.
	CopyFile(String, String)	Copies a file to a new location.
	CopyFile(String, String, UIOption)	Copies a file to a new location.
	CopyFile(String, String, Boolean)	Copies a file to a new location.
	CopyFile(String, String, UIOption, UICancelOption)	Copies a file to a new location.
	CreateDirectory	Creates a directory.
	DeleteDirectory(String, DeleteDirectoryOption)	Deletes a directory.
	DeleteDirectory(String, UIOption, RecycleOption)	Deletes a directory.
	DeleteDirectory(String, UIOption, RecycleOption, UICancelOption)	Deletes a directory.
	DeleteFile(String)	Deletes a file.
	DeleteFile(String, UIOption, RecycleOption)	Deletes a file.
	DeleteFile(String, UIOption, RecycleOption, UICancelOption)	Deletes a file.
	DirectoryExists	Returns True if the specified directory exists.
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	FileExists	Returns True if the specified file exists.
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	FindInFiles(String, String, Boolean, SearchOption)	Returns a read-only collection of strings representing the names of files containing the specified text.
	FindInFiles(String, String, Boolean, SearchOption, String[])	Returns a read-only collection of strings representing the names of files containing the specified text.
	GetDirectories(String)	Returns a collection of strings representing the path names of subdirectories within a directory.
	GetDirectories(String, SearchOption, String[])	Returns a collection of strings representing the path names of subdirectories within a directory.
	GetDirectoryInfo	Returns a DirectoryInfo object for the specified path.
	GetDriveInfo	Returns a DriveInfo object for the specified drive.
	GetFileInfo	Returns a FileInfo object for the specified file.
	GetFiles(String)	Returns a read-only collection of strings representing the names of files within a directory.
	GetFiles(String, SearchOption, String[])	Returns a read-only collection of strings representing the names of files within a directory.
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetName	Parses the file name out of the path provided.
	GetParentPath	Returns the parent path of the provided path.
	GetTempFileName	Creates a uniquely named zero-byte temporary file on disk and returns the full path of that file.
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	MoveDirectory(String, String)	Moves a directory from one location to another.
	MoveDirectory(String, String, UIOption)	Moves a directory from one location to another.
	MoveDirectory(String, String, Boolean)	Moves a directory from one location to another.
	MoveDirectory(String, String, UIOption, UICancelOption)	Moves a directory from one location to another.
	MoveFile(String, String)	Moves a file to a new location.
	MoveFile(String, String, UIOption)	Moves a file to a new location.
	MoveFile(String, String, Boolean)	Moves a file to a new location.
	MoveFile(String, String, UIOption, UICancelOption)	Moves a file to a new location.
	OpenTextFieldParser(String)	The OpenTextFieldParser method allows you to create a TextFieldParser object, which provides a way to easily and efficiently parse structured text files, such as logs. The TextFieldParser object can be used to read both delimited and fixed-width files.
	OpenTextFieldParser(String, Int32[])	The OpenTextFieldParser method allows you to create a TextFieldParser object, which provides a way to easily and efficiently parse structured text files, such as logs. The TextFieldParser object can be used to read both delimited and fixed-width files.
	OpenTextFieldParser(String, String[])	The OpenTextFieldParser method allows you to create a TextFieldParser object, which provides a way to easily and efficiently parse structured text files, such as logs. The TextFieldParser object can be used to read both delimited and fixed-width files.
	OpenTextFileReader(String)	Opens a StreamReader object to read from a file.
	OpenTextFileReader(String, Encoding)	Opens a StreamReader object to read from a file.
	OpenTextFileWriter(String, Boolean)	Opens a StreamWriter object to write to the specified file.
	OpenTextFileWriter(String, Boolean, Encoding)	Opens a StreamWriter to write to the specified file.
	ReadAllBytes	Returns the contents of a file as a byte array.
	ReadAllText(String)	Returns the contents of a text file as a String.
	ReadAllText(String, Encoding)	Returns the contents of a text file as a String.
	RenameDirectory	Renames a directory.
	RenameFile	Renames a file.
	ToString	Returns a string that represents the current object. (Inherited from Object.)
	WriteAllBytes	Writes data to a binary file.
	WriteAllText(String, String, Boolean)	Writes text to a file.
	WriteAllText(String, String, Boolean, Encoding)	Writes text to a file.

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Remarks

The following table lists examples of tasks involving the My.Computer.FileSystem object.

To	See
Read from a text file	How to: Read From Text Files in Visual Basic
Read from a delimited text file	How to: Read From Comma-Delimited Text Files in Visual Basic
Read from a fixed-width text file	How to: Read From Fixed-width Text Files in Visual Basic
Read from a text file with multiple formats	How to: Read From Text Files with Multiple Formats in Visual Basic
Read from a binary file	How to: Read From Binary Files in Visual Basic
Read from text files in the MyDocuments directory	How to: Read From Existing Text Files in My Documents (Visual Basic)
Read from a text file with a StreamReader	How to: Read Text from Files with a StreamReader (Visual Basic)
Write to a text file	How to: Write Text to Files in Visual Basic
Append to a text file	How to: Append to Text Files in Visual Basic
Write to a binary file	How to: Write to Binary Files in Visual Basic
Write to text files in the MyDocuments directory	How to: Write Text to Files in the My Documents Directory in Visual Basic
Write to a text file with a StreamWriter	How to: Write Text to Files with a StreamWriter in Visual Basic
Copy files with a specific pattern	How to: Copy Files with a Specific Pattern to a Directory in Visual Basic
Copy a file to the same directory	How to: Create a Copy of a File in the Same Directory in Visual Basic
Copy a file to a different directory	How to: Create a Copy of a File in a Different Directory in Visual Basic
Create a file	How to: Create a File in Visual Basic
Delete a file	How to: Delete a File in Visual Basic
Delete all the files in a directory	How to: Delete All Files in a Directory in Visual Basic
Find files with a specific pattern	How to: Find Files with a Specific Pattern in Visual Basic
Move a file	How to: Move a File in Visual Basic
Move a collection of files	How to: Move a Collection of Files in Visual Basic
Rename a file	How to: Rename a File in Visual Basic
Rename a directory	How to: Rename a Directory in Visual Basic
Copy a directory to another directory	How to: Copy a Directory to Another Directory in Visual Basic
Create a directory	How to: Create a Directory in Visual Basic
Delete a directory	How to: Delete a Directory in Visual Basic
Find subdirectories with a specific pattern	How to: Find Subdirectories with a Specific Pattern in Visual Basic
Get the collection of files in a directory	How to: Get the Collection of Files in a Directory in Visual Basic
Determine how many files are in a directory	How to: Determine How Many Files Are in a Directory in Visual Basic
Move a directory	How to: Move a Directory in Visual Basic
Move the contents of a directory	How to: Move the Contents of a Directory in Visual Basic
Read from the MyDocuments directory	How to: Retrieve the Contents of the My Documents Directory in Visual Basic
Parse a file path	How to: Parse File Paths in Visual Basic

Note
The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: Resources. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

Note

The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: Resources. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

Examples

This example checks to determine whether the folder C:\backup\logs exists and checks its properties.

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Dim logInfo As System.IO.DirectoryInfo
If My.Computer.FileSystem.DirectoryExists("C:\backup\logs") Then
    logInfo = My.Computer.FileSystem.GetDirectoryInfo(
      "C:\backup\logs")
End If

Version Information

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Reference

Microsoft.VisualBasic.FileIO Namespace

SpecialDirectories

Other Resources

Objects (Visual Basic)

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