Pagina della Guida del servizio HTTP Web WCF

.NET Framework 4.6.1 include una pagina automatica della Guida per i servizi HTTP WEB WCF. Questa pagina della Guida contiene una descrizione di ogni operazione, formato di richiesta e risposta e schema. Per impostazione predefinita, questa funzionalità è disabilitata. Se un utente passa a un servizio HTTP WEB WCF e aggiunge "/Help" alla fine dell'URL, ad esempio http://localhost:8000/Customers/Help, viene visualizzata una pagina della Guida come quella indicata di seguito.

L'utente può quindi fare clic su qualsiasi metodo elencato nella pagina della Guida e viene visualizzata la pagina dettagliata per l'operazione specificata, contenente ulteriori informazioni sul metodo, quali i formati del messaggio e le risposte di esempio. L'immagine seguente rappresenta un esempio di una pagina della Guida per un metodo.

Utilizzo della pagina della Guida relativa a HTTP Web WCF

La pagina della Guida relativa a HTTP WEB WCF contiene una breve descrizione per ogni operazione, a condizione che ne venga specificata una mediante DescriptionAttribute. Questo attributo utilizza una stringa che contiene una breve descrizione dell'operazione a cui è applicato. Il codice seguente indica ad esempio come utilizzare l'elemento DescriptionAttribute per fornire una breve descrizione.

[OperationContract]  
[WebGet(UriTemplate="/template1", BodyStyle = WebMessageBodyStyle.Bare)]  
[Description("Description for GET /template1")]  
SyndicationFeedFormatter GetTemplate1();  

Per abilitare la pagina della Guida relativa a HTTP WEB WCF, è necessario aggiungere un comportamento dell'endpoint agli endpoint del servizio. Questa operazione può essere eseguita nella configurazione o nel codice. Per abilitare la pagina della Guida relativa a HTTP WEB WCF nella configurazione, aggiungere un comportamento dell'endpoint con un elemento <webHttp>, impostare helpEnabled su true, aggiungere un endpoint e configurarlo per fare in modo che utilizzi il comportamento dell'endpoint. A tal fine, osservare il codice di configurazione indicato di seguito.

<endpointBehaviors>  
   <behavior name="RESTEndpointBehavior">  
      <webHttp helpEnabled="true"/>  
   </behavior>  
</endpointBehaviors>  
<!-- ... -->  
<services>  
   <service behaviorConfiguration="RESTWebServiceBehavior" name="RESTWebService">      <endpoint address="" kind="webHttpEndpoint" behaviorConfiguration="RESTEndpointBehavior" contract="IHello" />  
  
      <!-- ... -->  
   </service>  
</services>  

Per abilitare la pagina della Guida relativa a HTTP WEB WCF nel codice, aggiungere un endpoint servizio e un elemento WebHttpBehavior all'endpoint impostando HelpEnabled su true. A tal fine, osservare il codice indicato di seguito.

using (WebServiceHost host = new WebServiceHost(typeof(Service), new Uri("http://localhost:8000/Customers")))  
{  
   host.AddServiceEndpoint(typeof(ICustomerCollection), new WebHttpBinding(), "");
   host.Description.Endpoints[0].Behaviors.Add(new WebHttpBehavior { EnableHelp = true });  
   // ...  
}  

La pagina della Guida è basata su XHTML con markup che identifica le varie sezioni della pagina. In questo modo il client può accedere a livello di codice alla pagina utilizzando XElement o altre interfacce API XLinq.

Schemi utilizzati nella pagina della Guida relativa al servizio HTTP Web WCF

Gli schemi seguenti vengono utilizzati nella pagina della Guida relativa al servizio HTTP Web WCF.

<?xml version="1.0" encoding="utf-16"?>  
<xs:schema xmlns:tns="http://schemas.microsoft.com/2003/10/Serialization/" attributeFormDefault="qualified" elementFormDefault="qualified" targetNamespace="http://schemas.microsoft.com/2003/10/Serialization/" xmlns:xs="http://www.w3.org/2001/XMLSchema">  
  <xs:element name="anyType" nillable="true" type="xs:anyType" />  
  <xs:element name="anyURI" nillable="true" type="xs:anyURI" />  
  <xs:element name="base64Binary" nillable="true" type="xs:base64Binary" />  
  <xs:element name="boolean" nillable="true" type="xs:boolean" />  
  <xs:element name="byte" nillable="true" type="xs:byte" />  
  <xs:element name="dateTime" nillable="true" type="xs:dateTime" />  
  <xs:element name="decimal" nillable="true" type="xs:decimal" />  
  <xs:element name="double" nillable="true" type="xs:double" />  
  <xs:element name="float" nillable="true" type="xs:float" />  
  <xs:element name="int" nillable="true" type="xs:int" />  
  <xs:element name="long" nillable="true" type="xs:long" />  
  <xs:element name="QName" nillable="true" type="xs:QName" />  
  <xs:element name="short" nillable="true" type="xs:short" />  
  <xs:element name="string" nillable="true" type="xs:string" />  
  <xs:element name="unsignedByte" nillable="true" type="xs:unsignedByte" />  
  <xs:element name="unsignedInt" nillable="true" type="xs:unsignedInt" />  
  <xs:element name="unsignedLong" nillable="true" type="xs:unsignedLong" />  
  <xs:element name="unsignedShort" nillable="true" type="xs:unsignedShort" />  
  <xs:element name="char" nillable="true" type="tns:char" />  
  <xs:simpleType name="char">  
    <xs:restriction base="xs:int" />  
  </xs:simpleType>  
  <xs:element name="duration" nillable="true" type="tns:duration" />  
  <xs:simpleType name="duration">  
    <xs:restriction base="xs:duration">  
      <xs:pattern value="\-?P(\d*D)?(T(\d*H)?(\d*M)?(\d*(\.\d*)?S)?)?" />  
      <xs:minInclusive value="-P10675199DT2H48M5.4775808S" />  
      <xs:maxInclusive value="P10675199DT2H48M5.4775807S" />  
    </xs:restriction>  
  </xs:simpleType>  
  <xs:element name="guid" nillable="true" type="tns:guid" />  
  <xs:simpleType name="guid">  
    <xs:restriction base="xs:string">  
      <xs:pattern value="[\da-fA-F]{8}-[\da-fA-F]{4}-[\da-fA-F]{4}-[\da-fA-F]{4}-[\da-fA-F]{12}" />  
    </xs:restriction>  
  </xs:simpleType>  
  <xs:attribute name="FactoryType" type="xs:QName" />  
  <xs:attribute name="Id" type="xs:ID" />  
  <xs:attribute name="Ref" type="xs:IDREF" />  
</xs:schema>  
  
<?xml version="1.0" encoding="utf-16"?>  
<xs:schema xmlns:tns="http://microsoft.com/wsdl/types/" elementFormDefault="qualified" targetNamespace="http://microsoft.com/wsdl/types/" xmlns:xs="http://www.w3.org/2001/XMLSchema">  
  <xs:simpleType name="guid">  
    <xs:restriction base="xs:string">  
      <xs:pattern value="[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}" />  
    </xs:restriction>  
  </xs:simpleType>  
  <xs:simpleType name="char">  
    <xs:restriction base="xs:unsignedShort" />  
  </xs:simpleType>  
</xs:schema>  
  
<?xml version="1.0" encoding="utf-16"?>  
<xs:schema xmlns:tns="http://schemas.datacontract.org/2004/07/System" elementFormDefault="qualified" targetNamespace="http://schemas.datacontract.org/2004/07/System" xmlns:xs="http://www.w3.org/2001/XMLSchema">  
  <xs:import namespace="http://schemas.microsoft.com/2003/10/Serialization/" />  
  <xs:complexType name="DateTimeOffset">  
    <xs:annotation>  
      <xs:appinfo>  
        <IsValueType xmlns="http://schemas.microsoft.com/2003/10/Serialization/">true</IsValueType>  
      </xs:appinfo>  
    </xs:annotation>  
    <xs:sequence>  
      <xs:element name="DateTime" type="xs:dateTime" />  
      <xs:element name="OffsetMinutes" type="xs:short" />  
    </xs:sequence>  
  </xs:complexType>  
  <xs:element name="DateTimeOffset" nillable="true" type="tns:DateTimeOffset" />  
  <xs:complexType name="DBNull">  
    <xs:sequence />  
  </xs:complexType>  
  <xs:element name="DBNull" nillable="true" type="tns:DBNull" />  
</xs:schema>  
  
<?xml version="1.0" encoding="utf-16"?>  
<xs:schema xmlns:tns="http://schemas.microsoft.com/2003/10/Serialization/Arrays" xmlns:ser="http://schemas.microsoft.com/2003/10/Serialization/" elementFormDefault="qualified" targetNamespace="http://schemas.microsoft.com/2003/10/Serialization/Arrays" xmlns:xs="http://www.w3.org/2001/XMLSchema">  
  <xs:import namespace="http://schemas.microsoft.com/2003/10/Serialization/" />  
  <xs:complexType name="ArrayOfboolean">  
    <xs:sequence>  
      <xs:element minOccurs="0" maxOccurs="unbounded" name="boolean" type="xs:boolean" />  
    </xs:sequence>  
  </xs:complexType>  
  <xs:element name="ArrayOfboolean" nillable="true" type="tns:ArrayOfboolean" />  
  <xs:complexType name="ArrayOfchar">  
    <xs:sequence>  
      <xs:element minOccurs="0" maxOccurs="unbounded" name="char" type="ser:char" />  
    </xs:sequence>  
  </xs:complexType>  
  <xs:element name="ArrayOfchar" nillable="true" type="tns:ArrayOfchar" />  
  <xs:complexType name="ArrayOfdateTime">  
    <xs:sequence>  
      <xs:element minOccurs="0" maxOccurs="unbounded" name="dateTime" type="xs:dateTime" />  
    </xs:sequence>  
  </xs:complexType>  
  <xs:element name="ArrayOfdateTime" nillable="true" type="tns:ArrayOfdateTime" />  
  <xs:complexType name="ArrayOfdecimal">  
    <xs:sequence>  
      <xs:element minOccurs="0" maxOccurs="unbounded" name="decimal" type="xs:decimal" />  
    </xs:sequence>  
  </xs:complexType>  
  <xs:element name="ArrayOfdecimal" nillable="true" type="tns:ArrayOfdecimal" />  
  <xs:complexType name="ArrayOfdouble">  
    <xs:sequence>  
      <xs:element minOccurs="0" maxOccurs="unbounded" name="double" type="xs:double" />  
    </xs:sequence>  
  </xs:complexType>  
  <xs:element name="ArrayOfdouble" nillable="true" type="tns:ArrayOfdouble" />  
  <xs:complexType name="ArrayOffloat">  
    <xs:sequence>  
      <xs:element minOccurs="0" maxOccurs="unbounded" name="float" type="xs:float" />  
    </xs:sequence>  
  </xs:complexType>  
  <xs:element name="ArrayOffloat" nillable="true" type="tns:ArrayOffloat" />  
  <xs:complexType name="ArrayOfguid">  
    <xs:sequence>  
      <xs:element minOccurs="0" maxOccurs="unbounded" name="guid" type="ser:guid" />  
    </xs:sequence>  
  </xs:complexType>  
  <xs:element name="ArrayOfguid" nillable="true" type="tns:ArrayOfguid" />  
  <xs:complexType name="ArrayOfint">  
    <xs:sequence>  
      <xs:element minOccurs="0" maxOccurs="unbounded" name="int" type="xs:int" />  
    </xs:sequence>  
  </xs:complexType>  
  <xs:element name="ArrayOfint" nillable="true" type="tns:ArrayOfint" />  
  <xs:complexType name="ArrayOflong">  
    <xs:sequence>  
      <xs:element minOccurs="0" maxOccurs="unbounded" name="long" type="xs:long" />  
    </xs:sequence>  
  </xs:complexType>  
  <xs:element name="ArrayOflong" nillable="true" type="tns:ArrayOflong" />  
  <xs:complexType name="ArrayOfshort">  
    <xs:sequence>  
      <xs:element minOccurs="0" maxOccurs="unbounded" name="short" type="xs:short" />  
    </xs:sequence>  
  </xs:complexType>  
  <xs:element name="ArrayOfshort" nillable="true" type="tns:ArrayOfshort" />  
  <xs:complexType name="ArrayOfstring">  
    <xs:sequence>  
      <xs:element minOccurs="0" maxOccurs="unbounded" name="string" nillable="true" type="xs:string" />  
    </xs:sequence>  
  </xs:complexType>  
  <xs:element name="ArrayOfstring" nillable="true" type="tns:ArrayOfstring" />  
  <xs:complexType name="ArrayOfduration">  
    <xs:sequence>  
      <xs:element minOccurs="0" maxOccurs="unbounded" name="duration" type="ser:duration" />  
    </xs:sequence>  
  </xs:complexType>  
  <xs:element name="ArrayOfduration" nillable="true" type="tns:ArrayOfduration" />  
  <xs:complexType name="ArrayOfunsignedInt">  
    <xs:sequence>  
      <xs:element minOccurs="0" maxOccurs="unbounded" name="unsignedInt" type="xs:unsignedInt" />  
    </xs:sequence>  
  </xs:complexType>  
  <xs:element name="ArrayOfunsignedInt" nillable="true" type="tns:ArrayOfunsignedInt" />  
  <xs:complexType name="ArrayOfunsignedLong">  
    <xs:sequence>  
      <xs:element minOccurs="0" maxOccurs="unbounded" name="unsignedLong" type="xs:unsignedLong" />  
    </xs:sequence>  
  </xs:complexType>  
  <xs:element name="ArrayOfunsignedLong" nillable="true" type="tns:ArrayOfunsignedLong" />  
  <xs:complexType name="ArrayOfunsignedShort">  
    <xs:sequence>  
      <xs:element minOccurs="0" maxOccurs="unbounded" name="unsignedShort" type="xs:unsignedShort" />  
    </xs:sequence>  
  </xs:complexType>  
  <xs:element name="ArrayOfunsignedShort" nillable="true" type="tns:ArrayOfunsignedShort" />  
  <xs:complexType name="ArrayOfQName">  
    <xs:sequence>  
      <xs:element minOccurs="0" maxOccurs="unbounded" name="QName" nillable="true" type="xs:QName" />  
    </xs:sequence>  
  </xs:complexType>  
  <xs:element name="ArrayOfQName" nillable="true" type="tns:ArrayOfQName" />  
</xs:schema>  

Per altre informazioni sullo schema di serializzazione del contratto dati, vedere Riferimento allo schema del contratto dati.