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我正在编写一个测试 WCF 服务器，其方法是添加 2 个数字并等待可配置的毫秒数。

我写了一个 wcf 客户端。当我打开此客户端的两个实例时 - 在客户端 A 上，等待值为 50 秒，在另一个客户端 B 上，等待值为 0 秒。我希望当客户端 A 正在运行（长进程）时，客户端 B 会立即得到响应。

但是它不起作用。我一直在关注本教程WCF Concurrency

为什么它不适合我？

WCF 服务

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


namespace WCFService
{
    //[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall,ConcurrencyMode = ConcurrencyMode.Multiple,UseSynchronizationContext = true)]
    //[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall,ConcurrencyMode = ConcurrencyMode.Single)] 
    //[ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple)]
    //[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession,ConcurrencyMode = ConcurrencyMode.Multiple)]
    //[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall, ConcurrencyMode = ConcurrencyMode.Multiple)]
    [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession,ConcurrencyMode = ConcurrencyMode.Multiple)]
    public class WCFJobsLibrary : IWCFJobsLibrary
    {

        public ReturnClass AddNumbers(int FirstNumber, int SecondNumber, int Delay) //Add two numbers and wait a predefined interval
        {
            ReturnClass myReturnClass = new ReturnClass(-1, null, null, 0);
            try
            {             

                myReturnClass.ErrorCode = 1;
                myReturnClass.Result = FirstNumber + SecondNumber;
                System.Threading.Thread.Sleep(Delay); // Wait
                return myReturnClass;

            }
            catch (Exception ex)
            {              
                myReturnClass.ErrorCode = -1;
                myReturnClass.ErrorMessage = ex.ToString();
                return myReturnClass;
            }

        }

    }
}

WCF 客户端

try
            {

                radTextBoxResult.Text = ""; // Reset Result
                ServiceReference1.WCFJobsLibraryClient Client = new ServiceReference1.WCFJobsLibraryClient();
                Client.Endpoint.Address = new System.ServiceModel.EndpointAddress(radTextBoxbaseAddress.Text);
                WCFClient.ServiceReference1.ReturnClass AddNumbers_Result;
                AddNumbers_Result = Client.AddNumbers(int.Parse(radTextBoxFirstNumber.Text), int.Parse(radTextBoxSecondNumber.Text), int.Parse(radTextBoxDelay.Text));


                if (AddNumbers_Result.ErrorCode < 0)
                {
                    // If exception happens, it will be returned here
                    MessageBox.Show(AddNumbers_Result.ErrorCode.ToString() + " " + AddNumbers_Result.ErrorMessage + " " + AddNumbers_Result.ExMessage);
                }

                else
                {

                    radTextBoxResult.Text = AddNumbers_Result.Result.ToString();

                }

            }

            catch (Exception ex)
            {

                MessageBox.Show(ex.Message.ToString());

            }

应用程序配置

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <system.serviceModel>
        <behaviors>
            <serviceBehaviors>
                <behavior name="">
                    <serviceMetadata httpGetEnabled="true" />
                    <serviceDebug includeExceptionDetailInFaults="false" />
                  <serviceThrottling maxConcurrentCalls="16" maxConcurrentInstances="2147483647" maxConcurrentSessions="10" />
                </behavior>
            </serviceBehaviors>
        </behaviors>
        <services>
            <service name="WCFService.WCFJobsLibrary">
                <endpoint address="" binding="wsHttpBinding" contract="WCFService.IWCFJobsLibrary">
                    <identity>
                        <dns value="localhost" />
                    </identity>
                </endpoint>
                <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
                <host>
                    <baseAddresses>
                        <add baseAddress="http://localhost:8732/Design_Time_Addresses/WCFService/WCFJobsLibrary/" />
                    </baseAddresses>
                </host>
            </service>
        </services>
    </system.serviceModel>
</configuration>
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2 回答 2

1

问题可能是 InstanceContextMode = InstanceContextMode.PerSession 设置，因为您的 2 个调用共享同一个会话。尝试 InstanceContextMode = InstanceContextMode.PerCall。

这两个调用都使用您的服务的一个实例，但如果第一个调用将其停止 50 秒，那么第二个调用处理将等到线程重新开始工作并为第一个调用提供服务。

于 2013-02-09T16:49:24.887 回答
0

问题是我在主线程上的 winform 应用程序中启动服务。您需要在单独的线程上启动 WCF，如下所示。

C# 代码

private void radButtonStartWCFService_Click(object sender, EventArgs e)
{
    try
    {
        Thread Trd = new Thread(() => StartWCFServer());
        Trd.IsBackground = true;
        Trd.Start();

        radButtonStartWCFService.Enabled = false;
        radButtonStartWCFService.Text = "WCF Server Started";

    }

    catch(Exception ex)
    {
        MessageBox.Show(ex.Message.ToString());
    }
}


private void StartWCFServer()
{

    try
    {
        sHost = new ServiceHost(typeof(WCFService.WCFJobsLibrary));
        sHost.Open();

    }

    catch (Exception ex)
    {

        MessageBox.Show(ex.Message.ToString());

    }
}
于 2013-02-09T17:04:19.510 回答