Практическое руководство. Задание привязки клиента в коде

В этом примере создается клиент, предназначенный для использования службы калькулятора, и привязка этого клиента задается императивно в коде. Клиент обращается к службе CalculatorService, которая реализует интерфейс ICalculator; как служба, так и клиент используют класс BasicHttpBinding.

В приведенной процедуре предполагается, что служба калькулятора выполняется. Сведения о создании службы см. в разделе "Практическое руководство. Указание привязки службы в конфигурации". Он также использует средство служебной программы метаданных ServiceModel (Svcutil.exe)Windows Communication Foundation (WCF) для автоматического создания клиентских компонентов. Этот инструмент создает код клиента для доступа к службе.

Клиент создается в два этапа. Программа Svcutil.exe генерирует класс ClientCalculator, реализующий интерфейс ICalculator. Затем данное клиентское приложение создается путем создания экземпляра класса ClientCalculator и задания привязки и адреса для службы в коде.

Исходная копия этого примера см. в примере BasicBinding .

Задание пользовательской привязки в коде

  1. Из командной строки запустите программу Svcutil.exe, чтобы создать код из метаданных службы.

    Svcutil.exe <service's Metadata Exchange (MEX) address or HTTP GET address>
    
  2. Создаваемый клиент содержит интерфейс ICalculator, определяющий контракт службы, которому должна удовлетворять реализация клиента.

    [ServiceContract]
    public interface ICalculator
    {
       [OperationContract]
       double Add(double n1, double n2);
       [OperationContract]
       double Subtract(double n1, double n2);
       [OperationContract]
       double Multiply(double n1, double n2);
       [OperationContract]
       double Divide(double n1, double n2);
    }
    
    
    <ServiceContract()> _
    Public Interface ICalculator
    
        <OperationContract()> _
        Function Add(ByVal n1 As Double, ByVal n2 As Double) As Double
    
        <OperationContract()> _
        Function Subtract(ByVal n1 As Double, ByVal n2 As Double) As Double
    
        <OperationContract()> _
        Function Multiply(ByVal n1 As Double, ByVal n2 As Double) As Double
    
        <OperationContract()> _
        Function Divide(ByVal n1 As Double, ByVal n2 As Double) As Double
    
    End Interface
    
    
  3. Создаваемый клиент также содержит реализацию класса ClientCalculator.

    
    public class CalculatorClient : System.ServiceModel.ClientBase<Microsoft.ServiceModel.Samples.ICalculator>, Microsoft.ServiceModel.Samples.ICalculator
    {
    
        public CalculatorClient()
        {
        }
    
        public CalculatorClient(string endpointConfigurationName) :
                base(endpointConfigurationName)
        {
        }
    
        public CalculatorClient(string endpointConfigurationName, string remoteAddress) :
                base(endpointConfigurationName, remoteAddress)
        {
        }
    
        public CalculatorClient(string endpointConfigurationName, EndpointAddress remoteAddress) :
                base(endpointConfigurationName, remoteAddress)
        {
        }
    
        public CalculatorClient(Binding binding, 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);
        }
    }
    
    
    Public Class CalculatorClient
        Inherits System.ServiceModel.ClientBase(Of Microsoft.ServiceModel.Samples.ICalculator)
        Implements Microsoft.ServiceModel.Samples.ICalculator
    
        Public Sub New()
        End Sub
    
        Public Sub New(ByVal endpointConfigurationName As String)
            MyBase.New(endpointConfigurationName)
        End Sub
    
        Public Sub New(ByVal endpointConfigurationName As String, _
                       ByVal remoteAddress As String)
            MyBase.New(endpointConfigurationName, remoteAddress)
        End Sub
    
        Public Sub New(ByVal endpointConfigurationName As String, _
                       ByVal remoteAddress As EndpointAddress)
            MyBase.New(endpointConfigurationName, remoteAddress)
        End Sub
    
        Public Sub New(ByVal binding As Binding, _
                       ByVal remoteAddress As EndpointAddress)
            MyBase.New(binding, remoteAddress)
        End Sub
    
        Public Function Add(ByVal n1 As Double, _
                            ByVal n2 As Double) As Double Implements Microsoft.ServiceModel.Samples.ICalculator.Add
            Return MyBase.Channel.Add(n1, n2)
        End Function
    
        Public Function Subtract(ByVal n1 As Double, _
                                 ByVal n2 As Double) As Double Implements Microsoft.ServiceModel.Samples.ICalculator.Subtract
            Return MyBase.Channel.Subtract(n1, n2)
        End Function
    
        Public Function Multiply(ByVal n1 As Double, _
                                 ByVal n2 As Double) As Double Implements Microsoft.ServiceModel.Samples.ICalculator.Multiply
            Return MyBase.Channel.Multiply(n1, n2)
        End Function
    
        Public Function Divide(ByVal n1 As Double, _
                               ByVal n2 As Double) As Double Implements Microsoft.ServiceModel.Samples.ICalculator.Divide
            Return MyBase.Channel.Divide(n1, n2)
        End Function
    
    End Class
    
    
  4. Создайте экземпляр класса ClientCalculator, использующего класс BasicHttpBinding в клиентском приложении, и вызовите операции службы по указанному адресу.

    
        //Client implementation code.
        class Client
        {
            static void Main()
            {
    
                //Specify the binding to be used for the client.
                BasicHttpBinding binding = new BasicHttpBinding();
    
                //Specify the address to be used for the client.
                EndpointAddress address =
                   new EndpointAddress("http://localhost/servicemodelsamples/service.svc");
    
                // Create a client that is configured with this address and binding.
                CalculatorClient client = new CalculatorClient(binding, address);
    
                // Call the Add service operation.
                double value1 = 100.00D;
                double value2 = 15.99D;
                double result = client.Add(value1, value2);
                Console.WriteLine("Add({0},{1}) = {2}", value1, value2, result);
    
                // Call the Subtract service operation.
                value1 = 145.00D;
                value2 = 76.54D;
                result = client.Subtract(value1, value2);
                Console.WriteLine("Subtract({0},{1}) = {2}", value1, value2, result);
    
                // Call the Multiply service operation.
                value1 = 9.00D;
                value2 = 81.25D;
                result = client.Multiply(value1, value2);
                Console.WriteLine("Multiply({0},{1}) = {2}", value1, value2, result);
    
                // Call the Divide service operation.
                value1 = 22.00D;
                value2 = 7.00D;
                result = client.Divide(value1, value2);
                Console.WriteLine("Divide({0},{1}) = {2}", value1, value2, result);
    
                //Closing the client gracefully closes the connection and cleans up resources
                client.Close();
    
                Console.WriteLine();
                Console.WriteLine("Press <ENTER> to terminate client.");
                Console.ReadLine();
            }
        }
    }
    
    
    
        'Client implementation code.
        Friend Class Client
            Shared Sub Main()
    
                'Specify the binding to be used for the client.
                Dim binding As New BasicHttpBinding()
    
                'Specify the address to be used for the client.
                Dim address As New EndpointAddress("http://localhost/servicemodelsamples/service.svc")
    
    
                ' Create a client that is configured with this address and binding.
                Dim client As New CalculatorClient(binding, address)
    
                ' Call the Add service operation.
                Dim value1 = 100.0R
                Dim value2 = 15.99R
                Dim result = client.Add(value1, value2)
                Console.WriteLine("Add({0},{1}) = {2}", value1, value2, result)
    
                ' Call the Subtract service operation.
                value1 = 145.0R
                value2 = 76.54R
                result = client.Subtract(value1, value2)
                Console.WriteLine("Subtract({0},{1}) = {2}", value1, value2, result)
    
                ' Call the Multiply service operation.
                value1 = 9.0R
                value2 = 81.25R
                result = client.Multiply(value1, value2)
                Console.WriteLine("Multiply({0},{1}) = {2}", value1, value2, result)
    
                ' Call the Divide service operation.
                value1 = 22.0R
                value2 = 7.0R
                result = client.Divide(value1, value2)
                Console.WriteLine("Divide({0},{1}) = {2}", value1, value2, result)
    
                'Closing the client gracefully closes the connection and cleans up resources
                client.Close()
    
                Console.WriteLine()
                Console.WriteLine("Press <ENTER> to terminate client.")
                Console.ReadLine()
            End Sub
        End Class
    End Namespace
    
    
  5. Скомпилируйте и запустите клиент.

См. также