AsyncResult Sınıf

Tanım

Bir temsilci üzerinde zaman uyumsuz bir işlemin sonuçlarını kapsüller.Encapsulates the results of an asynchronous operation on a delegate.

public ref class AsyncResult : IAsyncResult, System::Runtime::Remoting::Messaging::IMessageSink
public class AsyncResult : IAsyncResult, System.Runtime.Remoting.Messaging.IMessageSink
[System.Runtime.InteropServices.ComVisible(true)]
public class AsyncResult : IAsyncResult, System.Runtime.Remoting.Messaging.IMessageSink
type AsyncResult = class
    interface IAsyncResult
    interface IMessageSink
[<System.Runtime.InteropServices.ComVisible(true)>]
type AsyncResult = class
    interface IAsyncResult
    interface IMessageSink
Public Class AsyncResult
Implements IAsyncResult, IMessageSink
Devralma
AsyncResult
Öznitelikler
Uygulamalar

Örnekler

Aşağıdaki örnek AsyncWaitHandle WaitHandle , bir temsilci üzerinde bir zaman uyumsuz çağrının nasıl bekleneceğini ve nasıl alınacağını gösterir.The following example demonstrates how to use the AsyncWaitHandle property to get a WaitHandle, and how to wait for an asynchronous call on a delegate. , WaitHandle Zaman uyumsuz çağrı tamamlandığında sinyal alırsınız ve yöntemini çağırarak bunu bekleyebilirsiniz WaitOne .The WaitHandle is signaled when the asynchronous call completes, and you can wait for it by calling the WaitOne method.

Örnek iki sınıftan oluşur, zaman uyumsuz olarak çağrılan yöntemi içeren sınıf ve Main çağrıyı yapan yöntemi içeren sınıf.The example consists of two classes, the class that contains the method which is called asynchronously, and the class that contains the Main method that makes the call.

Temsilciler kullanarak yöntemleri zaman uyumsuz olarak çağırma hakkında daha fazla bilgi ve örnek için bkz. zaman uyumsuz yöntemleri zaman uyumsuz olarak çağırma.For more information and more examples of calling methods asynchronously by using delegates, see Calling Synchronous Methods Asynchronously.

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.".

Açıklamalar

AsyncResultSınıfı, temsilciler kullanılarak yapılan zaman uyumsuz yöntem çağrıları ile birlikte kullanılır.The AsyncResult class is used in conjunction with asynchronous method calls made using delegates. IAsyncResultTemsilcinin BeginInvoke yönteminden döndürülen bir öğesine dönüşebilir AsyncResult .The IAsyncResult returned from the delegate's BeginInvoke method can be cast to an AsyncResult. , AsyncResult AsyncDelegate Zaman uyumsuz çağrının çağrıldığı temsilci nesnesini tutan özelliğine sahiptir.The AsyncResult has the AsyncDelegate property that holds the delegate object on which the asynchronous call was invoked.

BeginInvokeTemsilcileri kullanarak ve zaman uyumsuz çağrılar hakkında daha fazla bilgi için bkz. temsilcileri kullanarak zaman uyumsuz programlama.For more information about BeginInvoke and asynchronous calls using delegates, see Asynchronous Programming Using Delegates.

Özellikler

AsyncDelegate

Zaman uyumsuz çağrının çağrıldığı temsilci nesnesini alır.Gets the delegate object on which the asynchronous call was invoked.

AsyncState

Yöntem çağrısının son parametresi olarak belirtilen nesneyi alır BeginInvoke .Gets the object provided as the last parameter of a BeginInvoke method call.

AsyncWaitHandle

WaitHandleWin32 eşitleme tutamaçlarını kapsülleyen bir alır ve çeşitli eşitleme düzenlerinin uygulanmasına izin verir.Gets a WaitHandle that encapsulates Win32 synchronization handles, and allows the implementation of various synchronization schemes.

CompletedSynchronously

Çağrının eşzamanlı olarak tamamlanıp tamamlanmadığını gösteren bir değer alır BeginInvoke .Gets a value indicating whether the BeginInvoke call completed synchronously.

EndInvokeCalled

Geçerli değerde döndürülüp döndürülmeyeceğini gösteren bir değer alır veya ayarlar EndInvoke AsyncResult .Gets or sets a value indicating whether EndInvoke has been called on the current AsyncResult.

IsCompleted

Sunucunun çağrıyı tamamlayıp tamamlamadığını gösteren bir değer alır.Gets a value indicating whether the server has completed the call.

NextSink

Havuz zincirindeki bir sonraki ileti havuzunu alır.Gets the next message sink in the sink chain.

Yöntemler

AsyncProcessMessage(IMessage, IMessageSink)

Arabirimini uygular IMessageSink .Implements the IMessageSink interface.

Equals(Object)

Belirtilen nesnenin geçerli nesneye eşit olup olmadığını belirler.Determines whether the specified object is equal to the current object.

(Devralındığı yer: Object)
GetHashCode()

Varsayılan karma işlevi olarak işlev görür.Serves as the default hash function.

(Devralındığı yer: Object)
GetReplyMessage()

Zaman uyumsuz çağrının yanıt iletisini alır.Gets the response message for the asynchronous call.

GetType()

TypeGeçerli örneği alır.Gets the Type of the current instance.

(Devralındığı yer: Object)
MemberwiseClone()

Geçerli bir basit kopyasını oluşturur Object .Creates a shallow copy of the current Object.

(Devralındığı yer: Object)
SetMessageCtrl(IMessageCtrl)

IMessageCtrl, Zaman uyumsuz iletileri gönderildikten sonra denetlemek için bir yol sağlayan geçerli uzak yöntem çağrısı için bir tanımlar.Sets an IMessageCtrl for the current remote method call, which provides a way to control asynchronous messages after they have been dispatched.

SyncProcessMessage(IMessage)

Zaman uyumlu olarak uzak bir nesne üzerindeki bir yöntem çağrısıyla döndürülen yanıt iletisini işler.Synchronously processes a response message returned by a method call on a remote object.

ToString()

Geçerli nesneyi temsil eden dizeyi döndürür.Returns a string that represents the current object.

(Devralındığı yer: Object)

Şunlara uygulanır