第四章：WCF绑定(3)

原文：http://www.wcftutorial.net/Introduction-to-WCF.aspx

绑定的配置

配置绑定可以通过配置文件或者程序编码的方式进行，让我们看看两种不同的方式是如何进行的吧。

Administrative (配置方式):

在托管程序的配置文件中，你可以在<system.serviceModel>中添加节点<bindings>，并且添加特定的绑定类型到该节点的属性中。特定绑定类型的属性如下所示。绑定的名称属性将会在终结点信息中使用。

<system.serviceModel>
    <services>
        <service name="MyService">
            <endpoint address="http://localhost/IISHostedService/MyService.svc" 
                binding="wsHttpBinding" bindingName="wshttpbind" contract="IMyService">
                <identity>
                    <dns value="localhost"/>
                </identity>
            </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
        </service>
    </services>
    <bindings>
        <wsHttpBinding>
            <binding name="wshttpbind" allowCookies="true" closeTimeout="00:01:00" 
            receiveTimeout="00:01:00" />
        </wsHttpBinding>
    </bindings>
</system.serviceModel>

Programming Model:

在下面的代码中，我创建了一个WSHttpBinding的对象，并且赋值了需要配置的属性。这个绑定对象将会添加到Service的终结点中，用来与客户端进行通信。相类似的，你可以创建任何种类的绑定，并且添加到终结点中。

//Create a URI to serve as the base address
Uri httpUrl = new Uri("http://localhost:8090/MyService/SimpleCalculator");
//Create ServiceHost
ServiceHost host =
 new ServiceHost(typeof(MyCalculatorService.SimpleCalculator), httpUrl);

//Create Binding to add to end point
WSHttpBinding wshttpbind = new WSHttpBinding();
wshttpbind.AllowCookies = true;
wshttpbind.CloseTimeout = new TimeSpan(0, 1, 0);
wshttpbind.ReceiveTimeout  = new TimeSpan(0, 1, 0);

//Add a service endpoint
host.AddServiceEndpoint
(typeof(MyCalculatorService.ISimpleCalculator), wshttpbind, "");
//Enable metadata exchange
ServiceMetadataBehavior smb = new ServiceMetadataBehavior();
smb.HttpGetEnabled = true;
host.Description.Behaviors.Add(smb);
//Start the Service
host.Open();

Console.WriteLine("Service is host at " + DateTime.Now.ToString());
Console.WriteLine("Host is running... Press  key to stop");
Console.ReadLine();

注意：将绑定的属性配置在配置文件中是个最好的选择，因为当你将服务部署到生产环境中的时候，不需要更改代码了并且重新编译。所以使用配置文件是好的编程实践。