1 out of 10 rated this helpful - Rate this topic

FileStream.Write Method

.NET Framework 3.5

Other Versions

Writes a block of bytes to this stream using data from a buffer.

Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll)

Syntax

C++

JScript

Copy

public override void Write(
	byte[] array,
	int offset,
	int count
)

Parameters

array: Type: System.Byte[]
The buffer containing data to write to the stream.

offset: Type: System.Int32
The zero-based byte offset in array at which to begin copying bytes to the current stream.

count: Type: System.Int32
The number of bytes to be written to the current stream.

Exceptions

Exception	Condition
ArgumentNullException	array is null.
ArgumentException	offset and count describe an invalid range in array.
ArgumentOutOfRangeException	offset or count is negative.
IOException	An I/O error occurs. - or - Another thread may have caused an unexpected change in the position of the operating system's file handle.
ObjectDisposedException	The stream is closed.
NotSupportedException	The current stream instance does not support writing.

Remarks

This method overrides Write.

The offset parameter gives the offset of the byte in array (the buffer index) at which to begin copying, and the count parameter gives the number of bytes that will be written to the stream. If the write operation is successful, the current position of the stream is advanced by the number of bytes written. If an exception occurs, the current position of the stream is unchanged.

Note:
Use the CanWrite property to determine whether the current instance supports writing. For additional information, see CanWrite.

Do not interrupt a thread that is performing a write operation. Although the operation may appear to be successful after the thread is unblocked, the interruption can affect your application's performance and reliability.

For a list of common I/O tasks, see Common I/O Tasks.

Examples

This code example is part of a larger example provided for the Lock method.

C++

Copy

// Write the original file data.
if(fileStream.Length == 0)
{
    tempString = 
        lastRecordText + recordNumber.ToString();
    fileStream.Write(uniEncoding.GetBytes(tempString), 
        0, uniEncoding.GetByteCount(tempString));
}

Platforms

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, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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.

Version Information