Procedure: een clienttoepassing implementeren die gebruikmaakt van de detectieproxy om een service te vinden
Dit onderwerp is het derde van drie onderwerpen waarin wordt besproken hoe u een detectieproxy implementeert. In het vorige onderwerp: Een detecteerbare service implementeren die bij de detectieproxy wordt geregistreerd, hebt u een WCF-service geïmplementeerd die zich bij de detectieproxy registreert. In dit onderwerp maakt u een WCF-client die gebruikmaakt van de detectieproxy om de WCF-service te vinden.
De client implementeren
Voeg een nieuw consoletoepassingsproject toe aan de oplossing met de
DiscoveryProxyExamplenaamClient.Voeg verwijzingen toe aan de volgende assembly's:
System.ServiceModel
System.ServiceModel.Discovery
Voeg de GeneratedClient.cs onderaan dit onderwerp aan het project toe.
Notitie
Dit bestand wordt meestal gegenereerd met behulp van een hulpprogramma zoals Svcutil.exe. Deze wordt in dit onderwerp gegeven om de taak te vereenvoudigen.
Open het Program.cs-bestand en voeg de volgende methode toe. Deze methode gebruikt een eindpuntadres en gebruikt dit om de serviceclient (proxy) te initialiseren.
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(); }Voeg de volgende code toe aan de methode
Main.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(); }
U hebt de implementatie van de clienttoepassing voltooid. Ga door naar Instructies: De detectieproxy testen.
Opmerking
Dit is de volledige codevermelding voor dit onderwerp.
// 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();
}
}
}