HOW TO：實作使用探索 Proxy 搜尋服務的用戶端應用程式來尋找服務

發行項
02/28/2011

本主題是三個主題中的第三個，討論如何實作探索 Proxy。在先前的主題 HOW TO：實作以探索 Proxy 註冊的可探索服務中，您已實作透過探索 Proxy 註冊的 WCF。在本主題中，您會建立使用探索 Proxy 來尋找 WCF 服務的 WCF 用戶端，。

實作用戶端

將新的主控台應用程式專案加入至名為 Client 的 DiscoveryProxyExample 方案。
加入下列組件的參考：
1. System.ServiceModel
2. System.ServiceModel.Discovery
將在此主題底部找到的 GeneratedClient.cs 加入至專案。

注意：

這個檔案通常會使用 Svcutil.exe 之類的工具產生。本主題會提供該檔案以簡化這項工作。

注意：
這個檔案通常會使用 Svcutil.exe 之類的工具產生。本主題會提供該檔案以簡化這項工作。

開啟 Program.cs 檔案並加入下列方法。此方法會採用端點位址，並將其用於初始化服務用戶端 (Proxy)。

static void InvokeCalculatorService(EndpointAddress endpointAddress)
        {
            // Create a client
            CalculatorServiceClient client = new CalculatorServiceClient(new NetTcpBinding(), endpointAddress);
            Console.WriteLine("Invoking CalculatorService at {0}", endpointAddress.Uri);
            Console.WriteLine();

            double value1 = 100.00D;
            double value2 = 15.99D;

            // Call the Add service operation.
            double result = client.Add(value1, value2);
            Console.WriteLine("Add({0},{1}) = {2}", value1, value2, result);

            // Call the Subtract service operation.
            result = client.Subtract(value1, value2);
            Console.WriteLine("Subtract({0},{1}) = {2}", value1, value2, result);

            // Call the Multiply service operation.
            result = client.Multiply(value1, value2);
            Console.WriteLine("Multiply({0},{1}) = {2}", value1, value2, result);

            // Call the Divide service operation.
            result = client.Divide(value1, value2);
            Console.WriteLine("Divide({0},{1}) = {2}", value1, value2, result);
            Console.WriteLine();

            // Closing the client gracefully closes the connection and cleans up resources
            client.Close();
        }

將以下程式碼加入 Main 方法中。

public static void Main()
        {
            // Create a DiscoveryEndpoint that points to the DiscoveryProxy
            Uri probeEndpointAddress = new Uri("net.tcp://localhost:8001/Probe");
            DiscoveryEndpoint discoveryEndpoint = new DiscoveryEndpoint(new NetTcpBinding(), new EndpointAddress(probeEndpointAddress));

            // Create a DiscoveryClient passing in the discovery endpoint
            DiscoveryClient discoveryClient = new DiscoveryClient(discoveryEndpoint);

            Console.WriteLine("Finding ICalculatorService endpoints using the proxy at {0}", probeEndpointAddress);
            Console.WriteLine();

            try
            {
                // Search for services that implement ICalculatorService            
                FindResponse findResponse = discoveryClient.Find(new FindCriteria(typeof(ICalculatorService)));

                Console.WriteLine("Found {0} ICalculatorService endpoint(s).", findResponse.Endpoints.Count);
                Console.WriteLine();

                // Check to see if endpoints were found, if so then invoke the service.
                if (findResponse.Endpoints.Count > 0)
                {
                    InvokeCalculatorService(findResponse.Endpoints[0].Address);
                }
            }
            catch (TargetInvocationException)
            {
                Console.WriteLine("This client was unable to connect to and query the proxy. Ensure that the proxy is up and running.");
            }

            Console.WriteLine("Press <ENTER> to exit.");
            Console.ReadLine();
        }

您已經完成實作用戶端應用程式。請繼續參閱 HOW TO：測試探索 Proxy。

範例

以下是這個主題的完整程式碼清單。

    // GeneratedClient.cs
    //----------------------------------------------------------------
    // Copyright (c) Microsoft Corporation.  All rights reserved.
    //----------------------------------------------------------------
    //------------------------------------------------------------------------------
    // <auto-generated>
    //     This code was generated by a tool.
    //     Runtime Version:2.0.50727.1434
    //
    //     Changes to this file may cause incorrect behavior and will be lost if
    //     the code is regenerated.
    // </auto-generated>
    //------------------------------------------------------------------------------
    
    namespace Microsoft.Samples.Discovery
    {
        [System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "4.0.0.0")]
        [System.ServiceModel.ServiceContractAttribute(Namespace = "http://Microsoft.Samples.Discovery", ConfigurationName = "ICalculatorService")]
        public interface ICalculatorService
        {
    
            [System.ServiceModel.OperationContractAttribute(ProtectionLevel = System.Net.Security.ProtectionLevel.EncryptAndSign, Action = "http://Microsoft.Samples.Discovery/ICalculatorService/Add", ReplyAction = "http://Microsoft.Samples.Discovery/ICalculatorService/AddResponse")]
            double Add(double n1, double n2);
    
            [System.ServiceModel.OperationContractAttribute(ProtectionLevel = System.Net.Security.ProtectionLevel.EncryptAndSign, Action = "http://Microsoft.Samples.Discovery/ICalculatorService/Subtract", ReplyAction = "http://Microsoft.Samples.Discovery/ICalculatorService/SubtractResponse")]
            double Subtract(double n1, double n2);
    
            [System.ServiceModel.OperationContractAttribute(ProtectionLevel = System.Net.Security.ProtectionLevel.EncryptAndSign, Action = "http://Microsoft.Samples.Discovery/ICalculatorService/Multiply", ReplyAction = "http://Microsoft.Samples.Discovery/ICalculatorService/MultiplyResponse")]
            double Multiply(double n1, double n2);
    
            [System.ServiceModel.OperationContractAttribute(ProtectionLevel = System.Net.Security.ProtectionLevel.EncryptAndSign, Action = "http://Microsoft.Samples.Discovery/ICalculatorService/Divide", ReplyAction = "http://Microsoft.Samples.Discovery/ICalculatorService/DivideResponse")]
            double Divide(double n1, double n2);
        }
    
        [System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "4.0.0.0")]
        public interface ICalculatorServiceChannel : ICalculatorService, System.ServiceModel.IClientChannel
        {
        }
    
        [System.Diagnostics.DebuggerStepThroughAttribute()]
        [System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "4.0.0.0")]
        public partial class CalculatorServiceClient : System.ServiceModel.ClientBase<ICalculatorService>, ICalculatorService
        {
    
            public CalculatorServiceClient()
            {
            }
    
            public CalculatorServiceClient(string endpointConfigurationName) :
                base(endpointConfigurationName)
            {
            }
    
            public CalculatorServiceClient(string endpointConfigurationName, string remoteAddress) :
                base(endpointConfigurationName, remoteAddress)
            {
            }
    
            public CalculatorServiceClient(string endpointConfigurationName, System.ServiceModel.EndpointAddress remoteAddress) :
                base(endpointConfigurationName, remoteAddress)
            {
            }
    
            public CalculatorServiceClient(System.ServiceModel.Channels.Binding binding, System.ServiceModel.EndpointAddress remoteAddress) :
                base(binding, remoteAddress)
            {
            }
    
            public double Add(double n1, double n2)
            {
                return base.Channel.Add(n1, n2);
            }
    
            public double Subtract(double n1, double n2)
            {
                return base.Channel.Subtract(n1, n2);
            }
    
            public double Multiply(double n1, double n2)
            {
                return base.Channel.Multiply(n1, n2);
            }
    
            public double Divide(double n1, double n2)
            {
                return base.Channel.Divide(n1, n2);
            }
        }
    }

    // Program.cs
    //----------------------------------------------------------------
    // Copyright (c) Microsoft Corporation.  All rights reserved.
    //----------------------------------------------------------------
    
    using System;
    using System.Reflection;
    using System.ServiceModel;
    using System.ServiceModel.Discovery;
    
    namespace Microsoft.Samples.Discovery
    {
        class Client
        {
            public static void Main()
            {
                // Create a DiscoveryEndpoint that points to the DiscoveryProxy
                Uri probeEndpointAddress = new Uri("net.tcp://localhost:8001/Probe");
                DiscoveryEndpoint discoveryEndpoint = new DiscoveryEndpoint(new NetTcpBinding(), new EndpointAddress(probeEndpointAddress));
                
                DiscoveryClient discoveryClient = new DiscoveryClient(discoveryEndpoint);
    
                Console.WriteLine("Finding ICalculatorService endpoints using the proxy at {0}", probeEndpointAddress);
                Console.WriteLine();
    
                try
                {
                    // Find ICalculatorService endpoints            
                    FindResponse findResponse = discoveryClient.Find(new FindCriteria(typeof(ICalculatorService)));
    
                    Console.WriteLine("Found {0} ICalculatorService endpoint(s).", findResponse.Endpoints.Count);
                    Console.WriteLine();
    
                    // Check to see if endpoints were found, if so then invoke the service.
                    if (findResponse.Endpoints.Count > 0)
                    {
                        InvokeCalculatorService(findResponse.Endpoints[0].Address);
                    }
                }
                catch (TargetInvocationException)
                {
                    Console.WriteLine("This client was unable to connect to and query the proxy. Ensure that the proxy is up and running.");
                }
    
                Console.WriteLine("Press <ENTER> to exit.");
                Console.ReadLine();
            }
    
            static void InvokeCalculatorService(EndpointAddress endpointAddress)
            {
                // Create a client
                CalculatorServiceClient client = new CalculatorServiceClient(new NetTcpBinding(), endpointAddress);
                Console.WriteLine("Invoking CalculatorService at {0}", endpointAddress.Uri);
                Console.WriteLine();
    
                double value1 = 100.00D;
                double value2 = 15.99D;
    
                // Call the Add service operation.
                double result = client.Add(value1, value2);
                Console.WriteLine("Add({0},{1}) = {2}", value1, value2, result);
    
                // Call the Subtract service operation.
                result = client.Subtract(value1, value2);
                Console.WriteLine("Subtract({0},{1}) = {2}", value1, value2, result);
    
                // Call the Multiply service operation.
                result = client.Multiply(value1, value2);
                Console.WriteLine("Multiply({0},{1}) = {2}", value1, value2, result);
    
                // Call the Divide service operation.
                result = client.Divide(value1, value2);
                Console.WriteLine("Divide({0},{1}) = {2}", value1, value2, result);
                Console.WriteLine();
    
                // Closing the client gracefully closes the connection and cleans up resources
                client.Close();
            }
        }
    }

另請參閱

工作

HOW TO：實作探索 Proxy
HOW TO：實作以探索 Proxy 註冊的可探索服務

概念

WCF 探索概觀

共用方式為

HOW TO：實作使用探索 Proxy 搜尋服務的用戶端應用程式來尋找服務

實作用戶端

範例

另請參閱

工作

概念

其他資源