XPathMessageQuery Class
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XPathMessageQuery Class

.NET Framework (current version)
 

A message query that evaluates XPath expressions to retrieve data from a message.

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

System.Object
  System.ServiceModel.Dispatcher.MessageQuery
    System.ServiceModel.XPathMessageQuery

[ContentPropertyAttribute("Expression")]
public class XPathMessageQuery : MessageQuery

NameDescription
System_CAPS_pubmethodXPathMessageQuery()

Initializes a new instance of the XPathMessageQuery class.

System_CAPS_pubmethodXPathMessageQuery(String)

Initializes a new instance of the XPathMessageQuery class with the specified XPath expression.

System_CAPS_pubmethodXPathMessageQuery(String, XmlNamespaceManager)

Initializes a new instance of the XPathMessageQuery class with the specified XPath expression and XmlNamespaceManager.

System_CAPS_pubmethodXPathMessageQuery(String, XsltContext)

Initializes a new instance of the XPathMessageQuery class with the specified XPath expression and XsltContext.

NameDescription
System_CAPS_pubpropertyExpression

Gets or sets the XPath expression for the XPathMessageQuery instance.

System_CAPS_pubpropertyNamespaces

Gets the XmlNamespaceManager associated with this XPathMessageQuery instance.

NameDescription
System_CAPS_pubmethodCreateMessageQueryCollection()

Creates a message query collection that enables optimizations when executing multiple queries against a message.(Overrides MessageQuery.CreateMessageQueryCollection().)

System_CAPS_pubmethodEquals(Object)

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

System_CAPS_pubmethodEvaluate<TResult>(Message)

Evaluates the XPath query against the specified Message.(Overrides MessageQuery.Evaluate<TResult>(Message).)

System_CAPS_pubmethodEvaluate<TResult>(MessageBuffer)

Evaluates the XPath query against the specified MessageBuffer.(Overrides MessageQuery.Evaluate<TResult>(MessageBuffer).)

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

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_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

The following example shows how to create a QueryCorrelationInitializer and specify a MessageQuerySet using a XPathMessageQuery.

new SendReply
{
    Request = submitPO,
    Content = SendContent.Create(new InArgument<int>( (e) => po.Get(e).Id)), // creates a SendMessageContent
    CorrelationInitializers =
    {
        new QueryCorrelationInitializer
        {
            // initializes a correlation based on the PurchaseOrder Id sent in the reply message and stores it in the handle
            CorrelationHandle = poidHandle,
            MessageQuerySet = new MessageQuerySet
            {
                // int is the name of the parameter being sent in the outgoing response
                { "PoId", new XPathMessageQuery("sm:body()/ser:int", Constants.XPathMessageContext) }
            }
        }
    }                        
}, 

.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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