项目
11/18/2011

MemoryStream.Write Method

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Writes a block of bytes to the current stream using data read from a buffer.

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

Syntax

'Declaration
Public Overrides Sub Write ( _
    buffer As Byte(), _
    offset As Integer, _
    count As Integer _
)

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

Parameters

buffer
Type: array<System.Byte[]
The buffer to write data from.

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

count
Type: System.Int32
The maximum number of bytes to write.

Exceptions

Exception	Condition
ArgumentNullException	buffer is nulla null reference (Nothing in Visual Basic).
NotSupportedException	The stream does not support writing. For additional information see CanWrite. -or- The current position is closer than count bytes to the end of the stream, and the capacity cannot be modified.
ArgumentException	offset subtracted from the buffer length is less than count.
ArgumentOutOfRangeException	offset or count are negative.
IOException	An I/O error occurs.
ObjectDisposedException	The current stream instance is closed.

Remarks

This method overrides Write.

The offset parameter gives the offset of the first byte in buffer to write from, and the count parameter gives the number of bytes to write. If the write operation is successful, the current position within the stream is advanced by the number of bytes written. If an exception occurs, the current position within the stream is unchanged.

Except for a MemoryStream constructed with a byte[] parameter, write operations at the end of a MemoryStream expand the MemoryStream.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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