IAsyncResult 인터페이스

정의

네임스페이스:

System

어셈블리:

System.Runtime.dll

어셈블리:

mscorlib.dll

어셈블리:

netstandard.dll

비동기 작업의 상태를 나타냅니다.

public interface class IAsyncResult

public interface IAsyncResult

[System.Runtime.InteropServices.ComVisible(true)]
public interface IAsyncResult

type IAsyncResult = interface

[<System.Runtime.InteropServices.ComVisible(true)>]
type IAsyncResult = interface

Public Interface IAsyncResult

파생

System.IdentityModel.AsyncResult

System.IdentityModel.Selectors.SecurityTokenProvider.SecurityTokenAsyncResult

System.Runtime.Remoting.Messaging.AsyncResult

System.Threading.Tasks.Task

System.Transactions.CommittableTransaction

System.Web.Services.Protocols.WebClientAsyncResult

특성

ComVisibleAttribute

예제

다음 예제에서는 사용 하는 방법에 설명 합니다 AsyncWaitHandle 가져올 속성은 WaitHandle, 및 대리자에 대 한 비동기 호출 대기 하는 방법. 비동기 호출이 완료되면 WaitHandle 은 신호를 받으며 WaitOne 메서드를 호출하여 대기할 수 있습니다.

이 예제는 비동기적으로 호출되는 메서드를 포함하는 클래스와 호출을 만드는 메서드가 포함된 클래스의 두 클래스로 구성됩니다 Main .

자세한 내용 및 대리자를 사용 하 여 메서드를 비동기적으로 호출 하는 더 많은 예제를 참조 하세요 Calling Synchronous Methods Asynchronously합니다.

using namespace System;
using namespace System::Threading;
using namespace System::Runtime::InteropServices; 

namespace Examples {
namespace AdvancedProgramming {
namespace AsynchronousOperations
{
    public ref class AsyncDemo 
    {
    public:
        // The method to be executed asynchronously.
        String^ TestMethod(int callDuration, [OutAttribute] int% threadId) 
        {
            Console::WriteLine("Test method begins.");
            Thread::Sleep(callDuration);
            threadId = Thread::CurrentThread->ManagedThreadId;
            return String::Format("My call time was {0}.", callDuration);
        }
    };

    // The delegate must have the same signature as the method
    // it will call asynchronously.
    public delegate String^ AsyncMethodCaller(int callDuration, [OutAttribute] int% threadId);
}}}

using System;
using System.Threading;

namespace Examples.AdvancedProgramming.AsynchronousOperations
{
    public class AsyncDemo
    {
        // The method to be executed asynchronously.
        public string TestMethod(int callDuration, out int threadId)
        {
            Console.WriteLine("Test method begins.");
            Thread.Sleep(callDuration);
            threadId = Thread.CurrentThread.ManagedThreadId;
            return String.Format("My call time was {0}.", callDuration.ToString());
        }
    }
    // The delegate must have the same signature as the method
    // it will call asynchronously.
    public delegate string AsyncMethodCaller(int callDuration, out int threadId);
}

Imports System.Threading
Imports System.Runtime.InteropServices 

Namespace Examples.AdvancedProgramming.AsynchronousOperations
    Public Class AsyncDemo 
        ' The method to be executed asynchronously.
        Public Function TestMethod(ByVal callDuration As Integer, _
                <Out> ByRef threadId As Integer) As String
            Console.WriteLine("Test method begins.")
            Thread.Sleep(callDuration)
            threadId = Thread.CurrentThread.ManagedThreadId()
            return String.Format("My call time was {0}.", callDuration.ToString())
        End Function
    End Class

    ' The delegate must have the same signature as the method
    ' it will call asynchronously.
    Public Delegate Function AsyncMethodCaller(ByVal callDuration As Integer, _
        <Out> ByRef threadId As Integer) As String
End Namespace

#using <TestMethod.dll>

using namespace System;
using namespace System::Threading;
using namespace Examples::AdvancedProgramming::AsynchronousOperations;

void main() 
{
    // The asynchronous method puts the thread id here.
    int threadId;

    // Create an instance of the test class.
    AsyncDemo^ ad = gcnew AsyncDemo();

    // Create the delegate.
    AsyncMethodCaller^ caller = gcnew AsyncMethodCaller(ad, &AsyncDemo::TestMethod);
       
    // Initiate the asychronous call.
    IAsyncResult^ result = caller->BeginInvoke(3000, 
        threadId, nullptr, nullptr);

    Thread::Sleep(0);
    Console::WriteLine("Main thread {0} does some work.",
        Thread::CurrentThread->ManagedThreadId);

    // Wait for the WaitHandle to become signaled.
    result->AsyncWaitHandle->WaitOne();

    // Perform additional processing here.
    // Call EndInvoke to retrieve the results.
    String^ returnValue = caller->EndInvoke(threadId, result);

    // Close the wait handle.
    result->AsyncWaitHandle->Close();

    Console::WriteLine("The call executed on thread {0}, with return value \"{1}\".",
        threadId, returnValue);
}

/* This example produces output similar to the following:

Main thread 1 does some work.
Test method begins.
The call executed on thread 3, with return value "My call time was 3000.".
 */

using System;
using System.Threading;

namespace Examples.AdvancedProgramming.AsynchronousOperations
{
    public class AsyncMain
    {
        static void Main()
        {
            // The asynchronous method puts the thread id here.
            int threadId;

            // Create an instance of the test class.
            AsyncDemo ad = new AsyncDemo();

            // Create the delegate.
            AsyncMethodCaller caller = new AsyncMethodCaller(ad.TestMethod);

            // Initiate the asychronous call.
            IAsyncResult result = caller.BeginInvoke(3000,
                out threadId, null, null);

            Thread.Sleep(0);
            Console.WriteLine("Main thread {0} does some work.",
                Thread.CurrentThread.ManagedThreadId);

            // Wait for the WaitHandle to become signaled.
            result.AsyncWaitHandle.WaitOne();

            // Perform additional processing here.
            // Call EndInvoke to retrieve the results.
            string returnValue = caller.EndInvoke(out threadId, result);

            // Close the wait handle.
            result.AsyncWaitHandle.Close();

            Console.WriteLine("The call executed on thread {0}, with return value \"{1}\".",
                threadId, returnValue);
        }
    }
}

/* This example produces output similar to the following:

Main thread 1 does some work.
Test method begins.
The call executed on thread 3, with return value "My call time was 3000.".
 */

Imports System.Threading
Imports System.Runtime.InteropServices 

Namespace Examples.AdvancedProgramming.AsynchronousOperations

    Public Class AsyncMain 
        Shared Sub Main() 
            ' The asynchronous method puts the thread id here.
            Dim threadId As Integer

            ' Create an instance of the test class.
            Dim ad As New AsyncDemo()

            ' Create the delegate.
            Dim caller As New AsyncMethodCaller(AddressOf ad.TestMethod)
       
            ' Initiate the asynchronous call.
            Dim result As IAsyncResult = caller.BeginInvoke(3000, _
                threadId, Nothing, Nothing)

            Thread.Sleep(0)
            Console.WriteLine("Main thread {0} does some work.", _
                Thread.CurrentThread.ManagedThreadId)
            ' Perform additional processing here and then
            ' wait for the WaitHandle to be signaled.
            result.AsyncWaitHandle.WaitOne()

            ' Call EndInvoke to retrieve the results.
            Dim returnValue As String = caller.EndInvoke(threadId, result)

            ' Close the wait handle.
            result.AsyncWaitHandle.Close()

            Console.WriteLine("The call executed on thread {0}, with return value ""{1}"".", _
                threadId, returnValue)
        End Sub
    End Class
End Namespace

'This example produces output similar to the following:
'
'Main thread 1 does some work.
'Test method begins.
'The call executed on thread 3, with return value "My call time was 3000.".

설명

인터페이스는 IAsyncResult 비동기적으로 작동할 수 있는 메서드를 포함하는 클래스에 의해 구현됩니다. 비동기 작업을 시작하는 메서드의 반환 형식이며, 비동기 작업을 FileStream.BeginRead마치는 메서드(예: .)에 FileStream.EndRead전달됩니다. IAsyncResult 또한 비동기 작업이 완료되면 대리자가 호출 AsyncCallback 하는 메서드에도 개체가 전달됩니다.

인터페이스를 IAsyncResult 지원하는 개체는 비동기 작업에 대한 상태 정보를 저장하고 작업이 완료될 때 스레드가 신호를 받을 수 있도록 동기화 개체를 제공합니다.

참고

클래스는 AsyncResult 대리자를 사용하여 메서드를 BeginInvoke 비동기적으로 호출할 때 메서드에서 반환되는 구현 IAsyncResult 입니다.

인터페이스가 사용되는 방법에 IAsyncResult 대한 자세한 설명은 비동기적으로 호출 동기 메서드 항목을 참조하세요.

속성

AsyncState	비동기 작업을 한정하거나 정보를 포함하는 사용자 정의 개체를 가져옵니다.
AsyncWaitHandle	비동기 작업이 완료될 때까지 기다리는 데 사용하는 WaitHandle을 가져옵니다.
CompletedSynchronously	비동기 작업이 동기적으로 완료되었는지 여부를 나타내는 값을 가져옵니다.
IsCompleted	비동기 작업이 완료되었는지 여부를 나타내는 값을 가져옵니다.