File stream windows

Because such an unsuccessful call to FltQueryInformationFile or ZwQueryInformationFile does not return the required buffer size, filter drivers must make one or more additional calls to FltQueryInformationFile or ZwQueryInformationFile , passing a larger buffer in each call, until the buffer is large enough. Support for named data streams is file-system-specific. File system filter drivers can determine whether a file system supports named streams in either of the following ways:.

Skip to main content. This browser is no longer supported. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Is this page helpful? Please rate your experience Yes No. For more information, see Naming a File. The stream type also called an attribute type code is internal to the NTFS file system.

Users therefore can't create new stream types, but they can open existing NTFS file system types. See below for a list of stream types. By default, the default data stream is unnamed. This is the equivalent of " filename ". You can create a named stream in the file using the file naming conventions. When creating and working with files that have one-character names, prefix the file name with period followed by a backslash. The reason to do this is that Windows treats one-character file names as drive letters.

When a drive letter is specified with a relative path, a colon separates the drive letter from the path. When there is an ambiguity about whether a one-character name is a drive letter or a file name, Windows assumes it is a a drive letter if the string following the colon is a valid path, even if the drive letter is invalid. Following is the list of NTFS stream types, also called attribute type codes. Retrieves the current lifetime service object that controls the lifetime policy for this instance.

Gets the Type of the current instance. Prevents other processes from reading from or writing to the FileStream. Creates a shallow copy of the current Object. Creates a shallow copy of the current MarshalByRefObject object. Provides support for a Contract. Reads a sequence of bytes from the current file stream and advances the position within the file stream by the number of bytes read.

When overridden in a derived class, reads a sequence of bytes from the current stream and advances the position within the stream by the number of bytes read. Asynchronously reads a sequence of bytes from the current stream and advances the position within the stream by the number of bytes read.

Asynchronously reads a sequence of bytes from the current file stream and writes them to a byte array beginning at a specified offset, advances the position within the file stream by the number of bytes read, and monitors cancellation requests.

Asynchronously reads a sequence of bytes from the current stream, advances the position within the stream by the number of bytes read, and monitors cancellation requests. Asynchronously reads a sequence of bytes from the current file stream and writes them to a memory region, advances the position within the file stream by the number of bytes read, and monitors cancellation requests.

Writes a sequence of bytes from a read-only span to the current file stream and advances the current position within this file stream by the number of bytes written. When overridden in a derived class, writes a sequence of bytes to the current stream and advances the current position within this stream by the number of bytes written. Asynchronously writes a sequence of bytes to the current stream and advances the current position within this stream by the number of bytes written.

Asynchronously writes a sequence of bytes to the current stream, advances the current position within this stream by the number of bytes written, and monitors cancellation requests.

Asynchronously writes a sequence of bytes from a memory region to the current file stream, advances the current position within this file stream by the number of bytes written, and monitors cancellation requests.

Converts a managed stream in the. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. File Stream Class Reference Is this page helpful? Please rate your experience Yes No. Any additional feedback? Namespace: System. IO Assemblies: mscorlib. Important This type implements the IDisposable interface. Note Disk files always support random access. In this article. FileStream String, FileMode. Gets a value that indicates whether the current stream supports reading.

Gets a value that indicates whether the current stream supports seeking. Gets a value that determines whether the current stream can time out. Inherited from Stream.