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.
[Visual Basic] Public MustOverride Sub Write( _ ByVal buffer() As Byte, _ ByVal offset As Integer, _ ByVal count As Integer _ ) [C#] public abstract void Write( byte buffer, int offset, int count ); [C++] public: virtual void Write( unsigned char buffer __gc, int offset, int count ) = 0; [JScript] public abstract function Write( buffer : Byte, offset : int, count : int );
- An array of bytes. This method copies count bytes from buffer to the current stream.
- The zero-based byte offset in buffer at which to begin copying bytes to the current stream.
- The number of bytes to be written to the current stream.
|ArgumentException||The sum of offset and count is greater than the buffer length.|
|ArgumentNullException||buffer is a null reference (Nothing in Visual Basic).|
|ArgumentOutOfRangeException||offset or count is negative.|
|IOException||An I/O error occurs.|
|NotSupportedException||The stream does not support writing.|
|ObjectDisposedException||Methods were called after the stream was closed.|
For an example of creating a file and writing text to a file, see Writing Text to a File. For an example of reading text from a file, see Reading Text from a File. For an example of reading from and writing to a binary file, see Reading and Writing to a Newly Created Data File.
Use the CanWrite property to determine whether the current instance supports writing.
If the write operation is successful, the position within the stream advances by the number of bytes written. If an exception occurs, the position within the stream remains unchanged.
The default implementation calls the asynchronous BeginWrite method.
[Visual Basic, C#, C++] The following example demonstrates how to use the Write method to copy an input stream to an output stream.
[Visual Basic] Const size As Integer = 4096 Dim bytes(4096) As Byte Dim numBytes As Integer numBytes = input.Read(bytes, 0, size) While numBytes > 0 output.Write(bytes, 0, numBytes) numBytes = input.Read(bytes, 0, size) End While [C#] const int size = 4096; byte bytes = new byte; int numBytes; while((numBytes = input.Read(bytes, 0, size)) > 0) output.Write(bytes, 0, numBytes); [C++] const int size = 4096; Byte bytes = new Byte; int numBytes; while((numBytes = input->Read(bytes, 0, size)) > 0) output->Write(bytes, 0, numBytes);
[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button in the upper-left corner of the page.
Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework, Common Language Infrastructure (CLI) Standard