Jak na to: Určení vazby klienta v kódu

V tomto příkladu se vytvoří klient, který využívá službu kalkulačky, a vazba pro tohoto klienta je explicitně určena v kódu. Klient přistupuje k tomuto CalculatorService, který implementuje rozhraní ICalculator, a jak služba, tak i klient používají třídu BasicHttpBinding.

Tento postup předpokládá, že je spuštěná služba kalkulačky. Informace o sestavení služby naleznete v tématu Postupy: Určení vazby služby v konfiguraci. Také používá nástroj ServiceModel Metadata Utility (Svcutil.exe), který Windows Communication Foundation (WCF) poskytuje k automatickému generování klientských komponent. Nástroj vygeneruje kód klienta pro přístup ke službě.

Klient je sestavený ve dvou částech. Svcutil.exe vygeneruje ClientCalculator, která implementuje rozhraní ICalculator. Tato klientská aplikace se pak vytvoří vytvořením instance ClientCalculator a určením vazby a adresy služby v kódu.

Zdrojovou kopii tohoto příkladu najdete v ukázce BasicBinding.

Určení vlastní vazby v kódu

K vygenerování kódu z metadat služby použijte Svcutil.exe z příkazového řádku.
```
Svcutil.exe <service's Metadata Exchange (MEX) address or HTTP GET address>
```

Vygenerovaný klient obsahuje rozhraní #D0, které definuje kontrakt služby, který musí implementace klienta splňovat.

[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

Vygenerovaný klient také obsahuje implementaci 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

Vytvořte instanci třídy ClientCalculator , která používá BasicHttpBinding třídu v klientské aplikaci, a pak volejte operace služby na zadané adrese.


    //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({value1},{value2}) = {result}");

            // Call the Subtract service operation.
            value1 = 145.00D;
            value2 = 76.54D;
            result = client.Subtract(value1, value2);
            Console.WriteLine($"Subtract({value1},{value2}) = {result}");

            // Call the Multiply service operation.
            value1 = 9.00D;
            value2 = 81.25D;
            result = client.Multiply(value1, value2);
            Console.WriteLine($"Multiply({value1},{value2}) = {result}");

            // Call the Divide service operation.
            value1 = 22.00D;
            value2 = 7.00D;
            result = client.Divide(value1, value2);
            Console.WriteLine($"Divide({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

Zkompilujte a spusťte klienta.

Viz také

#B0 použití vazeb ke konfiguraci služeb a klientů #C1

Last updated on 2025-04-04

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Jak na to: Určení vazby klienta v kódu

Určení vlastní vazby v kódu

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