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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 type exposes the following members.

Public methodOperationInitializes a new instance of the Operation class.

Public propertyDocumentationGets or sets the text documentation for the instance of the DocumentableItem. (Inherited from DocumentableItem.)
Public propertyDocumentationElementGets or sets the documentation element for the DocumentableItem. (Inherited from DocumentableItem.)
Public propertyExtensibleAttributesGets or sets an array of type XmlAttribute that represents attribute extensions of WSDL to comply with Web Services Interoperability (WS-I) Basic Profile 1.1. (Inherited from DocumentableItem.)
Public propertyExtensionsGets the ServiceDescriptionFormatExtensionCollection associated with this Operation. (Overrides DocumentableItem.Extensions.)
Public propertyFaultsGets the collection of faults, or error messages, defined by the current Operation.
Public propertyMessagesGets the collection of instances of the Message class defined by the current Operation.
Public propertyNameGets or sets the name of the item. (Inherited from NamedItem.)
Public propertyNamespacesGets or sets the dictionary of namespace prefixes and namespaces used to preserve namespace prefixes and namespaces when a ServiceDescription object is constructed. (Inherited from DocumentableItem.)
Public propertyParameterOrderGets or sets an array of the elements contained in the ParameterOrderString.
Public propertyParameterOrderStringGets or sets an optional Remote Procedure Call (RPC) signature that orders specification for request-response or solicit-response operations.
Public propertyPortTypeGets the PortType of which the Operation is a member.

Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIsBoundByReturns a value that indicates whether the specified OperationBinding matches with the Operation.
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)

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;

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

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