FileAccess Enum

Reference

Definition

Namespace:: System.IO

Assemblies:: mscorlib.dll, System.IO.FileSystem.Primitives.dll

Assemblies:: netstandard.dll, System.Runtime.dll

Assembly:: System.IO.FileSystem.Primitives.dll

Assembly:: System.Runtime.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Important

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Defines constants for read, write, or read/write access to a file.

This enumeration supports a bitwise combination of its member values.

public enum class FileAccess

[System.Flags]
public enum FileAccess

[System.Flags]
[System.Serializable]
public enum FileAccess

[System.Flags]
[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public enum FileAccess

[<System.Flags>]
type FileAccess =

[<System.Flags>]
[<System.Serializable>]
type FileAccess =

[<System.Flags>]
[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type FileAccess =

Public Enum FileAccess

Inheritance: Object

ValueType

Enum
FileAccess

Attributes: FlagsAttribute SerializableAttribute ComVisibleAttribute

Fields

Name	Value	Description
Read	1	Read access to the file. Data can be read from the file. Combine with `Write` for read/write access.
Write	2	Write access to the file. Data can be written to the file. Combine with `Read` for read/write access.
ReadWrite	3	Read and write access to the file. Data can be written to and read from the file.

Examples

The following FileStream constructor grants read-only access to an existing file (FileAccess.Read).

FileStream^ s2 = gcnew FileStream( name, FileMode::Open, FileAccess::Read, FileShare::Read );

FileStream s2 = new FileStream(name, FileMode.Open, FileAccess.Read, FileShare.Read);

let s2 = new FileStream(name, FileMode.Open, FileAccess.Read, FileShare.Read)

Dim s2 As New FileStream(name, FileMode.Open, FileAccess.Read, FileShare.Read)

Remarks

For an example of creating a file and writing text to a file, see How to: Write Text to a File. For an example of reading text from a file, see How to: Read Text from a File. For an example of reading from and writing to a binary file, see How to: Read and Write to a Newly Created Data File.

A FileAccess parameter is specified in many of the constructors for File, FileInfo, FileStream, and other constructors where it is important to control the kind of access users have to a file.

Applies to

Продукт	Версии
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.3, 1.4, 1.6, 2.0, 2.1
UWP	10.0

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