XPathMessageQuery Class
.NET Framework 4.5
A message query that evaluates XPath expressions to retrieve data from a message.
Namespace: System.ServiceModel
Assembly: System.ServiceModel (in System.ServiceModel.dll)
The XPathMessageQuery type exposes the following members.
| Name | Description | |
|---|---|---|
 | XPathMessageQuery() | Initializes a new instance of the XPathMessageQuery class. |
| XPathMessageQuery(String) | Initializes a new instance of the XPathMessageQuery class with the specified XPath expression. |
| XPathMessageQuery(String, XmlNamespaceManager) | Initializes a new instance of the XPathMessageQuery class with the specified XPath expression and XmlNamespaceManager. |
| XPathMessageQuery(String, XsltContext) | Initializes a new instance of the XPathMessageQuery class with the specified XPath expression and XsltContext. |
| Name | Description | |
|---|---|---|
| Expression | Gets or sets the XPath expression for the XPathMessageQuery instance. |
| Namespaces | Gets the XmlNamespaceManager associated with this XPathMessageQuery instance. |
| Name | Description | |
|---|---|---|
| CreateMessageQueryCollection | Creates a message query collection that enables optimizations when executing multiple queries against a message. (Overrides MessageQuery.CreateMessageQueryCollection().) |
| Equals(Object) | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
| Evaluate<TResult>(Message) | Evaluates the XPath query against the specified Message. (Overrides MessageQuery.Evaluate<TResult>(Message).) |
| Evaluate<TResult>(MessageBuffer) | Evaluates the XPath query against the specified MessageBuffer. (Overrides MessageQuery.Evaluate<TResult>(MessageBuffer).) |
| Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
| GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
| ToString | 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) } } } } },
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
