WebServiceBindingAttribute Class

A binding, as defined by Web Services Description Language (WSDL), is similar to an interface, in that it defines a concrete set of operations. Each XML Web service method is an operation within a particular binding. XML Web service methods are members of either the default binding for an XML Web service or a binding specified within a WebServiceBindingAttribute applied to a class implementing an XML Web service. An XML Web service can implement multiple bindings, by applying multiple WebServiceBindingAttribute attributes to an XML Web service.

Once one or more WebServiceAttribute attributes are applied to an XML Web service, a SoapDocumentMethodAttribute or SoapRpcMethodAttribute can be applied to individual XML Web service methods to indicate the binding operation implemented by a particular XML Web service method. Set the Binding property of SoapDocumentMethodAttribute or SoapRpcMethodAttribute to specify the binding an XML Web service method is implementing an operation for.

The following XML Web service implements operations from four bindings. Specifically, the XML Web service declares three bindings it implements operations for, by applying three WebServiceBindingAttribute attributes to the XML Web service.

To specify which binding an XML Web service method is implementing an operation for, a SoapDocumentMethodAttribute is applied to each of the XML Web service methods, except DefaultBindingMethod. By not specifying a binding for DefaultBindingMethod, it is implementing an operation on the default binding for the XML Web service.

<%@ WebService Language="C#" class="BindingSample" %>
 using System;
 using System.Web.Services;
 using System.Web.Services.Protocols;

 // Binding is defined in this XML Web service and uses the default namespace.
 [ WebServiceBinding(Name="LocalBinding")]

 // Binding is defined in this XML Web service, but it is not a part of the default namespace.
 [ WebServiceBinding(Name="LocalBindingNonDefaultNamespace", 
		     Namespace="http://www.contoso.com/MyBinding" )]

 // Binding is defined on a remote server, but this XML Web service implements at least one operation in that binding.
 [ WebServiceBinding(Name="RemoteBinding", 
		  Namespace="http://www.contoso.com/MyBinding",
		  Location="http://www.contoso.com/MySevice.asmx?wsdl")]
 public class BindingSample  {

      [ SoapDocumentMethod(Binding="LocalBinding")]
      [ WebMethod() ]
      public string LocalBindingMethod() {
               return "Member of binding defined in this XML Web service and member of the default namespace";
      }
      [ SoapDocumentMethod(Binding="LocalBindingNonDefaultNamespace")] 
      [ WebMethod() ]
      public string LocalBindingNonDefaultNamespaceMethod() {
              return "Member of binding defined in this XML Web service, but a part of a different namespace";
      }

     [ SoapDocumentMethod(Binding="RemoteBinding")] 
     [ WebMethod() ]
      public string RemoteBindingMethod() {
              return "Member of a binding defined on another server";
      }

      [ WebMethod() ]
      public string DefaultBindingMethod() {
              return "Member of the default binding";
      }

 }

.NET Framework

.NET Framework Client Profile

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference