Message.Close Metode

Definisi

Ruang nama:

System.ServiceModel.Channels

Rakitan:

System.ServiceModel.Primitives.dll

Paket:

System.ServiceModel.Primitives v8.0.0

Sumber:

Message.cs

Message Menutup dan merilis sumber daya apa pun.

public:
 void Close();

public void Close ();

member this.Close : unit -> unit

Public Sub Close ()

Contoh

Contoh kode berikut menunjukkan cara membuat pesan, mengirimkannya ke layanan, dan menerima pesan respons. Konten pesan respons ditampilkan dan kemudian pesan ditutup.

using System;
using System.Collections.Generic;
using System.Text;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.Runtime.Serialization;

namespace ConsoleApplication1
{
    class client
    {

        static void RunClient()
        {
            //Step1: create a binding with just HTTP
            CustomBinding binding = new CustomBinding();
            binding.Elements.Add(new HttpTransportBindingElement());
            //Step2: use the binding to build the channel factory
            IChannelFactory<IRequestChannel> factory =
            binding.BuildChannelFactory<IRequestChannel>(
                             new BindingParameterCollection());
            //open the channel factory
            factory.Open();
            //Step3: use the channel factory to create a channel
            IRequestChannel channel = factory.CreateChannel(
               new EndpointAddress("http://localhost:8080/channelapp"));
            channel.Open();
            //Step4: create a message
            Message requestmessage = Message.CreateMessage(
                MessageVersion.Soap12WSAddressing10,
                "http://contoso.com/someaction",
                 "This is the body data");
            //send message
            Message replymessage = channel.Request(requestmessage);
            Console.WriteLine("Reply message received");
            Console.WriteLine("Reply action: {0}",
                                  replymessage.Headers.Action);
            string data = replymessage.GetBody<string>();
            Console.WriteLine("Reply content: {0}", data);
            //Step5: don't forget to close the message
            requestmessage.Close();
            replymessage.Close();
            //don't forget to close the channel
            channel.Close();
            //don't forget to close the factory
            factory.Close();
        }
        public static void Main()
        {
            Console.WriteLine("Press [ENTER] when service is ready");
            Console.ReadLine();
            RunClient();
            Console.WriteLine("Press [ENTER] to exit");
            Console.ReadLine();
        }
    }
}

Imports System.Collections.Generic
Imports System.Text
Imports System.ServiceModel
Imports System.ServiceModel.Channels
Imports System.Runtime.Serialization

Namespace ConsoleApplication1
    Friend Class client


        Private Shared Sub RunClient()
            'Step1: create a binding with just HTTP
            Dim binding As New CustomBinding()
            binding.Elements.Add(New HttpTransportBindingElement())
            'Step2: use the binding to build the channel factory
            Dim factory As IChannelFactory(Of IRequestChannel) = binding.BuildChannelFactory(Of IRequestChannel)(New BindingParameterCollection())
            'open the channel factory
            factory.Open()
            'Step3: use the channel factory to create a channel
            Dim channel As IRequestChannel = factory.CreateChannel(New EndpointAddress("http://localhost:8080/channelapp"))
            channel.Open()
            'Step4: create a message
            Dim requestmessage As Message = Message.CreateMessage(MessageVersion.Soap12WSAddressing10, "http://contoso.com/someaction", "This is the body data")
            'send message
            Dim replymessage As Message = channel.Request(requestmessage)
            Console.WriteLine("Reply message received")
            Console.WriteLine("Reply action: {0}", replymessage.Headers.Action)
            Dim data = replymessage.GetBody(Of String)()
            Console.WriteLine("Reply content: {0}", data)
            'Step5: don't forget to close the message
            requestmessage.Close()
            replymessage.Close()
            'don't forget to close the channel
            channel.Close()
            'don't forget to close the factory
            factory.Close()
        End Sub
        Public Shared Sub Main()
            Console.WriteLine("Press [ENTER] when service is ready")
            Console.ReadLine()
            RunClient()
            Console.WriteLine("Press [ENTER] to exit")
            Console.ReadLine()
        End Sub
    End Class
End Namespace

Keterangan

memang Message memiliki finalizer, yang menyebabkan Close dipanggil untuk Anda ketika pesan dikumpulkan sampah. Ini tidak optimal, karena mekanisme Pengumpulan Sampah (GC) .NET Framework tidak selalu berjalan ketika Anda kehabisan sumber daya sistem selain memori. Untuk alasan ini, Anda harus selalu memanggil metode ini ketika selesai dengan konten pesan. Metode Close ini adalah sinonim untuk Dispose (yang Message juga mengimplementasikan). Pesan juga membuang objek yang digunakan untuk membangun tubuh ketika dibuang.

ObjectDisposedException dilemparkan jika Anda memanggil metode apa pun atau mengakses properti pesan apa pun setelah ditutup. Memanggil metode apa pun atau mengakses properti objek lain yang terkait dengan pesan setelah ditutup, (seperti koleksi header pesan, nilai properti pesan, atau XmlReader instans yang dikembalikan untuk isi atau untuk header) memiliki perilaku yang tidak terdefinisi.