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IsolatedStorageFileStream.BeginWrite Method

Begins an asynchronous write.

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

public override IAsyncResult BeginWrite (
	byte[] buffer,
	int offset,
	int numBytes,
	AsyncCallback userCallback,
	Object stateObject
)
public IAsyncResult BeginWrite (
	byte[] buffer, 
	int offset, 
	int numBytes, 
	AsyncCallback userCallback, 
	Object stateObject
)
public override function BeginWrite (
	buffer : byte[], 
	offset : int, 
	numBytes : int, 
	userCallback : AsyncCallback, 
	stateObject : Object
) : IAsyncResult
Not applicable.

Parameters

buffer

The buffer to write data to.

offset

The byte offset in buffer at which to begin writing.

numBytes

The maximum number of bytes to write.

userCallback

The method to call when the asynchronous write operation is completed. This parameter is optional.

stateObject

The status of the asynchronous write.

Return Value

An IAsyncResult that represents the asynchronous write, which is possibly still pending. This IAsyncResult must be passed to this stream's EndWrite method to ensure that the write is complete, then frees resources appropriately. This can be done either by the same code that called BeginWrite or in a callback passed to BeginWrite.

Exception typeCondition

IOException

An asynchronous write was attempted past the end of the file.

If a IsolatedStorageFileStream object is writable, writing at the end of the stream expands the stream.

The current position in the stream is updated when you issue the asynchronous read or write, not when the I/O operation completes.

You must call EndWrite with the IAsyncResult object that this method returns to find out how many bytes were written.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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