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Operation Class

Provides an abstract definition of an action supported by the XML Web service. This class cannot be inherited.

Namespace:  System.Web.Services.Description
Assembly:  System.Web.Services (in System.Web.Services.dll)

public sealed class Operation : NamedItem

The Operation class corresponds to the Web Services Description Language (WSDL) operation element enclosed by the portType element. For more information about WSDL, see the specification at

The following example demonstrates a typical use of the Operation class. The example takes a ServiceDescription that does not have a PortType that supports the HTTP POST protocol. It adds a PortType instance that supports POST, and writes out a new WSDL contract.

using System;
using System.Web.Services.Description;
using System.Collections;
using System.Xml;

class MyOperationClass
   public static void Main()
      ServiceDescription myDescription = ServiceDescription.Read("Operation_5_Input_CS.wsdl");
      // Create a 'PortType' object.
      PortType myPortType = new PortType();
      myPortType.Name = "OperationServiceHttpPost";
      Operation myOperation = CreateOperation
      // Get the PortType of the Operation. 
      PortType myPort = myOperation.PortType;
         "The port type of the operation is: " + myPort.Name);
      // Add the 'PortType's to 'PortTypeCollection' of 'ServiceDescription'.

      // Write the 'ServiceDescription' as a WSDL file.
      Console.WriteLine("WSDL file with name 'Operation_5_Output_CS.wsdl' file created Successfully");
   public static Operation CreateOperation(string myOperationName,string myInputMesg,string myOutputMesg)
      // Create an Operation.
      Operation myOperation = new Operation();
      myOperation.Name = myOperationName;
      OperationMessage myInput = (OperationMessage)new OperationInput();
      myInput.Message =  new XmlQualifiedName(myInputMesg);
      OperationMessage myOutput = (OperationMessage)new OperationOutput();
      myOutput.Message = new XmlQualifiedName(myOutputMesg);

      // Add messages to the OperationMessageCollection.
      Console.WriteLine("Operation name is: " + myOperation.Name);     
      return myOperation;
#using <mscorlib.dll>
#using <System.Xml.dll>
#using <System.Web.Services.dll>
#using <System.dll>
using namespace System;
using namespace System::Web::Services::Description;
using namespace System::Collections;
using namespace System::Xml;

Operation* CreateOperation(String* myOperationName,String* myInputMesg,String* myOutputMesg)
   // Create an Operation.
   Operation* myOperation = new Operation();
   myOperation->Name = myOperationName;
   OperationMessage* myInput = dynamic_cast<OperationMessage*>(new OperationInput());
   myInput->Message =  new XmlQualifiedName(myInputMesg);
   OperationMessage* myOutput = dynamic_cast<OperationMessage*>(new OperationOutput());
   myOutput->Message = new XmlQualifiedName(myOutputMesg);

   // Add messages to the OperationMessageCollection.
   Console::WriteLine(S"Operation name is: {0}", myOperation->Name);     
   return myOperation;

int main()
   ServiceDescription* myDescription = ServiceDescription::Read(S"Operation_5_Input_CS.wsdl");
   // Create a 'PortType' object.
   PortType* myPortType = new PortType();
   myPortType->Name = S"OperationServiceHttpPost";
   Operation* myOperation = CreateOperation
   // Get the PortType of the Operation. 
   PortType* myPort = myOperation->PortType;
      S"The port type of the operation is: {0}", myPort->Name);
   // Add the 'PortType's to 'PortTypeCollection' of 'ServiceDescription'.

   // Write the 'ServiceDescription' as a WSDL file.
   Console::WriteLine(S"WSDL file with name 'Operation_5_Output_CS.wsdl' file created Successfully");

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0