OperationFlow Enumeration

 

Specifies the type of transmission an endpoint of the XML Web service can support.

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

Public Enumeration OperationFlow

Member nameDescription
None

Indicates that the endpoint of the XML Web service receives no transmissions.

Notification

Indicates that the endpoint of the XML Web service sends a message.

OneWay

Indicates that the endpoint of the XML Web service receives a message.

RequestResponse

Indicates that the endpoint of the XML Web service receives a message, then sends a correlated message.

SolicitResponse

Indicates that the endpoint of the XML Web service sends a message, then receives a correlated message.

Although request-response or solicit-response operations are logically correlated in the Web Services Description Language (WSDL) document, the concrete correlation information will be specified by a binding. For example, the request and response messages can be exchanged as part of one or two actual HTTP transmissions.

The following sample demonstrates the use of the OperationFlow enumeration.

Imports System
Imports System.Xml
Imports System.Web.Services
Imports System.Web.Services.Description


Class MyOperationFlowSample

   Public Shared Sub Main()
      Try
         Dim myDescription As ServiceDescription = _
            ServiceDescription.Read("MathService_Input_vb.wsdl")
         Dim myPortTypeCollection As PortTypeCollection = _
            myDescription.PortTypes

         ' Get the OperationCollection for SOAP protocol.
         Dim myOperationCollection As OperationCollection = _
            myPortTypeCollection(0).Operations
         ' Get the OperationMessageCollection for the Add operation.
         Dim myOperationMessageCollection As OperationMessageCollection = _
            myOperationCollection(0).Messages

         ' Indicate that the endpoint or service receives no 
         ' transmissions (None).
         Console.WriteLine("myOperationMessageCollection does not " & _
            "contain any operation messages.")
         DisplayOperationFlowDescription(myOperationMessageCollection.Flow)
         Console.WriteLine()

         ' Indicate that the endpoint or service receives a message (OneWay).
         Dim myInputOperationMessage As OperationMessage = _
            CType(New OperationInput(), OperationMessage)
         Dim myXmlQualifiedName As New XmlQualifiedName("AddSoapIn", _
            myDescription.TargetNamespace)
         myInputOperationMessage.Message = myXmlQualifiedName
         myOperationMessageCollection.Add(myInputOperationMessage)
         Console.WriteLine("myOperationMessageCollection contains " & _
            "only input operation messages.")
         DisplayOperationFlowDescription(myOperationMessageCollection.Flow)
         Console.WriteLine()

         myOperationMessageCollection.Remove(myInputOperationMessage)

         ' Indicate that an endpoint or service sends a message (Notification).
         Dim myOutputOperationMessage As OperationMessage = _
            CType(New OperationOutput(), OperationMessage)
         Dim myXmlQualifiedName1 As New XmlQualifiedName("AddSoapOut", _
            myDescription.TargetNamespace)
         myOutputOperationMessage.Message = myXmlQualifiedName1
         myOperationMessageCollection.Add(myOutputOperationMessage)
         Console.WriteLine("myOperationMessageCollection contains only " & _
            "output operation messages.")
         DisplayOperationFlowDescription(myOperationMessageCollection.Flow)
         Console.WriteLine()

         ' Indicate that an endpoint or service sends a message, then
         ' receives a correlated message (SolicitResponse).
         myOperationMessageCollection.Add(myInputOperationMessage)
         Console.WriteLine("myOperationMessageCollection contains " & _
            "an output operation message first, then " & _
            "an input operation message.")
         DisplayOperationFlowDescription(myOperationMessageCollection.Flow)
         Console.WriteLine()

         ' Indicate that an endpoint or service receives a message,
         ' then sends a correlated message (RequestResponse).
         myOperationMessageCollection.Remove(myInputOperationMessage)
         myOperationMessageCollection.Insert(0, myInputOperationMessage)
         Console.WriteLine("myOperationMessageCollection contains " & _
            "an input operation message first, then " & _
            "an output operation message.")
         DisplayOperationFlowDescription(myOperationMessageCollection.Flow)
         Console.WriteLine()

         myDescription.Write("MathService_new_vb.wsdl")
         Console.WriteLine( _
            "The file MathService_new_vb.wsdl was successfully written.")
      Catch e As Exception
         Console.WriteLine("Exception caught!!!")
         Console.WriteLine("Source : " & e.Source.ToString())
         Console.WriteLine("Message : " & e.Message.ToString())
      End Try
   End Sub 'Main
   Public Shared Sub DisplayOperationFlowDescription(myOperationFlow As OperationFlow)
      Select Case myOperationFlow
         Case OperationFlow.None
            Console.WriteLine("Indicates that the endpoint or service " & _
               "receives no transmissions (None).")
         Case OperationFlow.OneWay
            Console.WriteLine("Indicates that the endpoint or service " & _
               "receives a message (OneWay).")
         Case OperationFlow.Notification
            Console.WriteLine("Indicates that the endpoint or service " & _
               "sends a message (Notification).")
         Case OperationFlow.SolicitResponse
            Console.WriteLine("Indicates that the endpoint or service " & _
               "sends a message, then receives a correlated message " & _
               "(SolicitResponse).")
          Case OperationFlow.RequestResponse
            Console.WriteLine("Indicates that the endpoint or service " & _
               "receives a message, then sends a correlated message " & _
               "(RequestResponse).")
      End Select
   End Sub 'DisplayOperationFlowDescription
End Class 'MyOperationFlowSample

.NET Framework
Available since 1.1
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