Receive Class

Receive Class

.NET Framework (current version)
 

An activity that receives a message.

Namespace:   System.ServiceModel.Activities
Assembly:  System.ServiceModel.Activities (in System.ServiceModel.Activities.dll)

System.Object
  System.Activities.Activity
    System.ServiceModel.Activities.Receive

[ContentPropertyAttribute("Content")]
public sealed class Receive : Activity

NameDescription
System_CAPS_pubmethodReceive()

Initializes a new instance of the Receive class.

NameDescription
System_CAPS_pubpropertyAction

Gets or sets the value of the action header of the message.

System_CAPS_protpropertyCacheId

Gets the identifier of the cache that is unique within the scope of the workflow definition.(Inherited from Activity.)

System_CAPS_pubpropertyCanCreateInstance

Gets or sets a value that indicates whether a new workflow instance is created to process the message if the message does not correlate to an existing workflow instance..

System_CAPS_pubpropertyContent

Gets or sets the data to receive. The content can be either a ReceiveMessageContent or a ReceiveParametersContent.

System_CAPS_pubpropertyCorrelatesOn

Gets or sets the MessageQuerySet used to query the message to extract correlation data.

System_CAPS_pubpropertyCorrelatesWith

Gets or sets a correlation handle that is used to route the message to the appropriate workflow instance.

System_CAPS_pubpropertyCorrelationInitializers

Gets a collection of correlation initializers that initialize query-based, context, callback context, or request-reply correlations with a Send activity runs.

System_CAPS_pubpropertyDisplayName

Gets or sets an optional friendly name that is used for debugging, validation, exception handling, and tracking.(Inherited from Activity.)

System_CAPS_pubpropertyId

Gets an identifier that is unique in the scope of the workflow definition.(Inherited from Activity.)

System_CAPS_protpropertyImplementationVersion

Gets or sets the version of the implementation used.(Inherited from Activity.)

System_CAPS_pubpropertyKnownTypes

Gets a collection of known types for the operation.

System_CAPS_pubpropertyOperationName

Gets or sets the name of the operation implemented by the Receive.

System_CAPS_pubpropertyProtectionLevel

Gets or sets a value that indicates the protection level for the operation.

System_CAPS_pubpropertySerializerOption

Gets or sets a value that specifies the serializer to use for this operation.

System_CAPS_pubpropertyServiceContractName

Gets or sets the name of the service contract.

NameDescription
System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_pubmethodSystem_CAPS_staticFromOperationDescription(OperationDescription)

Returns the receive activity from the given contract operation description.

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethodShouldSerializeCorrelatesOn()

Returns a value that indicates whether the CorrelatesOn property has changed from its default value and should be serialized.

System_CAPS_pubmethodShouldSerializeDisplayName()

Indicates whether the DisplayName property should be serialized.(Inherited from Activity.)

System_CAPS_pubmethodToString()

Returns a String that contains the Id and DisplayName of the Activity.(Inherited from Activity.)

The Receive activity can receive a single item or multiple items depending on the type of receive content used.

System_CAPS_warningWarning

When a workflow contains multiple Receive activities with the same operation name, the CorrelatesOn property must be set to the same set of correlation queries.

The following example shows how to create a Receive activity and add it to a workflow in code.

Variable<string> message = new Variable<string> { Name = "message" };
Variable<string> echo = new Variable<string> { Name = "echo" };
Receive receiveString = new Receive
{
    OperationName = "Echo",
    ServiceContractName = "Echo",
    CanCreateInstance = true,
    //parameters for receive
    Content = new ReceiveParametersContent
    {
        Parameters = 
        {
            {"message", new OutArgument<string>(message)}
        }
    }
};

Sequence workflow = new Sequence()
{
    Variables = { message, echo },
    Activities =
        {
            receiveString,
            new WriteLine
            {
                Text = new InArgument<string>(env =>("Message received: " + message.Get(env)))
            },
            new Assign<string>
            {
                Value = new InArgument<string>(env =>("<echo> " + message.Get(env))),
                To = new OutArgument<string>(echo)
            },                        
            //parameters for reply
            new SendReply
            {                           
                Request = receiveString,                            
                Content = new SendParametersContent
                {
                    Parameters =
                    {
                        { "echo", new InArgument<string>(echo) }
                    },
                }
            },
            new WriteLine
            {
                Text = new InArgument<string>(env =>("Message sent: " + echo.Get(env)))
            },
        },
};

service = new WorkflowService
{
    Name = "Echo",
    Body = workflow
};

The following example shows how to create a Receive activity and add it to a workflow service in XAML.

<WorkflowService mc:Ignorable="sap" ConfigurationName="Service1" Name="Service1" mva:VisualBasic.Settings="Assembly references and imported namespaces serialized as XML namespaces" xmlns="http://schemas.microsoft.com/netfx/2009/xaml/servicemodel" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:mv="clr-namespace:Microsoft.VisualBasic;assembly=System" xmlns:mva="clr-namespace:Microsoft.VisualBasic.Activities;assembly=System.Activities" xmlns:p="http://schemas.microsoft.com/netfx/2009/xaml/activities" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:s1="clr-namespace:System;assembly=System" xmlns:s2="clr-namespace:System;assembly=System.Xml" xmlns:s3="clr-namespace:System;assembly=System.Core" xmlns:sad="clr-namespace:System.Activities.Debugger;assembly=System.Activities" xmlns:sap="http://schemas.microsoft.com/netfx/2009/xaml/activities/presentation" xmlns:scg="clr-namespace:System.Collections.Generic;assembly=System" xmlns:scg1="clr-namespace:System.Collections.Generic;assembly=System.ServiceModel" xmlns:scg2="clr-namespace:System.Collections.Generic;assembly=System.Core" xmlns:scg3="clr-namespace:System.Collections.Generic;assembly=mscorlib" xmlns:sd="clr-namespace:System.Data;assembly=System.Data" xmlns:sl="clr-namespace:System.Linq;assembly=System.Core" xmlns:ssa="clr-namespace:System.ServiceModel.Activities;assembly=System.ServiceModel.Activities" xmlns:st="clr-namespace:System.Text;assembly=mscorlib" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
  <p:Sequence sad:XamlDebuggerXmlReader.FileName="c:\Projects\WFServiceSnippets\WFServiceSnippets\Service1.xamlx" sap:VirtualizedContainerService.HintSize="277,644" mva:VisualBasic.Settings="Assembly references and imported namespaces serialized as XML namespaces">
    <p:Sequence.Variables>
      <p:Variable x:TypeArguments="CorrelationHandle" Name="__handle1" />
      <p:Variable x:TypeArguments="x:String" Name="Message" />
      <p:Variable x:TypeArguments="x:String" Name="Echo" />
    </p:Sequence.Variables>
    <sap:WorkflowViewStateService.ViewState>
      <scg3:Dictionary x:TypeArguments="x:String, x:Object">
        <x:Boolean x:Key="IsExpanded">True</x:Boolean>
      </scg3:Dictionary>
    </sap:WorkflowViewStateService.ViewState>
    <Receive x:Name="__ReferenceID0" CanCreateInstance="True" DisplayName="ReceiveString" sap:VirtualizedContainerService.HintSize="255,90" OperationName="Echo" ServiceContractName="Echo">
      <Receive.CorrelationInitializers>
        <RequestReplyCorrelationInitializer CorrelationHandle="[__handle1]" />
      </Receive.CorrelationInitializers>
      <ReceiveParametersContent>
        <p:OutArgument x:TypeArguments="x:String" x:Key="message">[Message]</p:OutArgument>
      </ReceiveParametersContent>
    </Receive>
    <p:WriteLine sap:VirtualizedContainerService.HintSize="255,61" Text="[&quot;Message received: &quot; + Message]" />
    <p:Assign sap:VirtualizedContainerService.HintSize="255,58">
      <p:Assign.To>
        <p:OutArgument x:TypeArguments="x:String">[Echo]</p:OutArgument>
      </p:Assign.To>
      <p:Assign.Value>
        <p:InArgument x:TypeArguments="x:String">["&lt;echo&gt; " + Message]</p:InArgument>
      </p:Assign.Value>
    </p:Assign>
    <SendReply Request="{x:Reference __ReferenceID0}" DisplayName="SendReply" sap:VirtualizedContainerService.HintSize="255,90">
      <SendParametersContent>
        <p:InArgument x:TypeArguments="x:String" x:Key="echo">[Echo]</p:InArgument>
      </SendParametersContent>
    </SendReply>
    <p:WriteLine sap:VirtualizedContainerService.HintSize="255,61" Text="[&quot;Message sent: &quot; + Echo]" />
  </p:Sequence>
</WorkflowService>

.NET Framework
Available since 4.0

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

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