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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
)

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.

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.

The following table lists examples of other typical or related I/O tasks.

To do this...

See the example in this topic...

Create a text file.

How to: Write Text to a File

Write to a text file.

How to: Write Text to a File

Read from a text file.

How to: Read Text from a File

Append text to a file.

How to: Open and Append to a Log File

File.AppendText

FileInfo.AppendText

Rename or move a file.

File.Move

FileInfo.MoveTo

Copy a file.

File.Copy

FileInfo.CopyTo

Get the size of a file.

FileInfo.Length

Get the attributes of a file.

File.GetAttributes

Set the attributes of a file.

File.SetAttributes

Determine if a file exists.

File.Exists

Read from a binary file.

How to: Read and Write to a Newly Created Data File

Write to a binary file.

How to: Read and Write to a Newly Created Data File

Create a directory.

Directory.CreateDirectory

Directory.CreateDirectory

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 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 .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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