FileStream Constructor (String, FileMode, FileSystemRights, FileShare, Int32, FileOptions, FileSecurity)
Initializes a new instance of the FileStream class with the specified path, creation mode, access rights and sharing permission, the buffer size, additional file options, access control and audit security.
Assembly: mscorlib (in mscorlib.dll)
public function FileStream( path : String, mode : FileMode, rights : FileSystemRights, share : FileShare, bufferSize : int, options : FileOptions, fileSecurity : FileSecurity )
- Type: System.String
A relative or absolute path for the file that the current FileStream object will encapsulate.
- Type: System.IO.FileMode
A constant that determines how to open or create the file.
- Type: System.Security.AccessControl.FileSystemRights
A constant that determines the access rights to use when creating access and audit rules for the file.
- Type: System.IO.FileShare
A constant that determines how the file will be shared by processes.
- Type: System.Int32
A positive Int32 value greater than 0 indicating the buffer size. For bufferSize values between one and eight, the actual buffer size is set to eight bytes.
- Type: System.IO.FileOptions
A constant that specifies additional file options.
- Type: System.Security.AccessControl.FileSecurity
A constant that determines the access control and audit security for the file.
path is a null reference (Nothing in Visual Basic).
path is an empty string (""), contains only white space, or contains one or more invalid characters.
path refers to a non-file device, such as "con:", "com1:", "lpt1:", etc. in an NTFS environment.
path refers to a non-file device, such as "con:", "com1:", "lpt1:", etc. in a non-NTFS environment.
bufferSize is negative or zero.
mode, access, or share contain an invalid value.
The file cannot be found, such as when mode is FileMode.Truncate or FileMode.Open, and the file specified by path does not exist. The file must already exist in these modes.
An I/O error occurs, such as specifying FileMode.CreateNew and the file specified by path already exists.
The stream has been closed.
The caller does not have the required permission.
The specified path is invalid, such as being on an unmapped drive.
The access requested is not permitted by the operating system for the specified path, such as when access is Write or ReadWrite and the file or directory is set for read-only access.
Encrypted is specified for options, but file encryption is not supported on the current platform.
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.
The current operating system is not Windows NT or later.
The .NET Framework does not support direct access to physical disks through paths that are device names, such as "\\.\PHYSICALDRIVE0 ".
Use this FileStream constructor to apply access rights at the point of creation of a file. To access or modify rights on an existing file, consider using the GetAccessControl and SetAccessControl methods.
The fileOptions parameter is used to provide access to more advanced operations that can be leveraged when creating a FileStream object.
The path parameter can be a file name, including a file on a Universal Naming Convention (UNC) share.
path is not required to be a file stored on disk; it can be any part of a system that supports access through streams. For example, depending on the system, this class can access a physical device.
CanSeek is true for all FileStream objects that encapsulate files. If path indicates a device that does not support seeking, the CanSeek property on the resulting FileStream is false. For additional information, see CanSeek.
When you compile a set of characters with a particular cultural setting and retrieve those same characters with a different cultural setting, the characters might not be interpretable, and could cause an exception to be thrown.
For a list of common I/O tasks, see Common I/O Tasks.
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.