Opens a binary file, reads the contents of the file into a byte array, and then closes the file.
(in mscorlib.dll)
Visual Basic (Declaration)
Public Shared Function ReadAllBytes ( _
path As String _
) As Byte()
Dim path As String
Dim returnValue As Byte()
returnValue = File.ReadAllBytes(path)
public static byte[] ReadAllBytes(
string path
)
public:
static array<unsigned char>^ ReadAllBytes(
String^ path
)
public static function ReadAllBytes(
path : String
) : byte[]
Return Value
Type:
array<System..::.Byte>[]()[]A byte array containing the contents of the file.
| Exception | Condition |
|---|
| ArgumentException |
path is a zero-length string, contains only white space, or contains one or more invalid characters as defined by InvalidPathChars. |
| ArgumentNullException |
path is nullNothingnullptra null reference (Nothing in Visual Basic). |
| PathTooLongException | The specified path, file name, or both exceed the system-defined maximum length. For example, on Windows-based platforms, paths must be less than 248 characters, and file names must be less than 260 characters. |
| DirectoryNotFoundException | The specified path is invalid (for example, it is on an unmapped drive). |
| IOException | An I/O error occurred while opening the file. |
| UnauthorizedAccessException | This operation is not supported on the current platform. -or-
path specified a directory. -or- The caller does not have the required permission. |
| FileNotFoundException | The file specified in path was not found. |
| NotSupportedException |
path is in an invalid format. |
| SecurityException | The caller does not have the required permission. |
Given a file path, this method opens the file, reads the contents of the file into a byte array, and then closes the file.
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 3.5, 3.0, 2.0
Reference
Other Resources