Message.Close 方法

定义

命名空间:

System.ServiceModel.Channels

程序集:

System.ServiceModel.Primitives.dll

包:

System.ServiceModel.Primitives v8.0.0

Source:

Message.cs

关闭 Message 并释放任何资源。

public:
 void Close();

public void Close ();

member this.Close : unit -> unit

Public Sub Close ()

示例

下面的代码示例演示如何创建消息，将它发送给服务，并接收响应消息。 将显示响应消息的内容，然后关闭消息。

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

注解

Message 确实具有一个终结器，当消息作为垃圾回收时，它会为您调用 Close。 这不是最佳的做法，因为当系统资源不足而不是内存不足时，并不需要运行 .NET Framework 的垃圾回收 (GC) 机制。 因此，不再使用消息内容时都应该调用此方法。 Close 方法是 Dispose（也可由 Message）的同义词。 释放消息时，消息也会释放用于构造正文的对象。

关闭消息后，如果调用任何方法或访问消息的任何属性，都会引发 ObjectDisposedException。 关闭消息后，调用任何方法或访问与消息相关的其他对象（例如，消息头集合、消息属性值或为正文和标头返回的 XmlReader 实例）的任何属性都会出现不可确定的行为。