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FileStream.EndWrite Method

Ends an asynchronous write, blocking until the I/O operation has completed.

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

public override void EndWrite (
	IAsyncResult asyncResult
)
public void EndWrite (
	IAsyncResult asyncResult
)
public override function EndWrite (
	asyncResult : IAsyncResult
)
Not applicable.

Parameters

asyncResult

The pending asynchronous I/O request.

Exception typeCondition

ArgumentNullException

asyncResult is a null reference (Nothing in Visual Basic).

ArgumentException

This IAsyncResult object was not created by calling BeginWrite on this class.

InvalidOperationException

EndWrite is called multiple times.

IOException

The stream is closed or an internal error has occurred.

This method overrides EndWrite.

EndWrite must be called exactly once on every IAsyncResult from BeginWrite. EndWrite will block until the I/O operation has completed.

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

Windows Mobile 2003 for Pocket PC, Windows Mobile 2003 for Smartphone, Windows CE Platform Note: In .NET Compact Framework applications, this method is supported, but it is reserved for future use. Using this method will raise a NotSupportedException until it becomes available in a future release.

This code example is part of a larger example provided for the FileStream(String,FileMode,FileAccess,FileShare,Int32,Boolean) constructor.

static void EndWriteCallback(IAsyncResult asyncResult)
{
    State tempState = (State)asyncResult.AsyncState;
    FileStream fStream = tempState.FStream;
    fStream.EndWrite(asyncResult);

    // Asynchronously read back the written data.
    fStream.Position = 0;
    asyncResult = fStream.BeginRead(
        tempState.ReadArray, 0 , tempState.ReadArray.Length, 
        new AsyncCallback(EndReadCallback), tempState);

    // Concurrently do other work, such as 
    // logging the write operation.
}

static void EndWriteCallback(IAsyncResult asyncResult)
{
    State tempState = ((State)(asyncResult.get_AsyncState()));
    FileStream fStream = tempState.get_FStream();
    fStream.EndWrite(asyncResult);

    // Asynchronously read back the written data.
    fStream.set_Position(0);
    asyncResult = fStream.BeginRead(tempState.get_ReadArray(), 0,
        tempState.get_ReadArray().length , 
        new AsyncCallback(EndReadCallback), tempState);

    // Concurrently do other work, such as 
    // logging the write operation.
} //EndWriteCallback

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

.NET Compact Framework

Supported in: 2.0, 1.0

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