Visual Basic (Declaration)

<KnownTypeAttribute(GetType(MatchAllMessageFilter))> _
<DataContractAttribute> _
<KnownTypeAttribute(GetType(XPathMessageFilter))> _
<KnownTypeAttribute(GetType(ActionMessageFilter))> _
<KnownTypeAttribute(GetType(MatchNoneMessageFilter))> _
Public MustInherit Class MessageFilter

Visual Basic (Usage)

Dim instance As MessageFilter

C#

[KnownTypeAttribute(typeof(MatchAllMessageFilter))]
[DataContractAttribute]
[KnownTypeAttribute(typeof(XPathMessageFilter))]
[KnownTypeAttribute(typeof(ActionMessageFilter))]
[KnownTypeAttribute(typeof(MatchNoneMessageFilter))]
public abstract class MessageFilter

Visual C++

[KnownTypeAttribute(typeof(MatchAllMessageFilter))]
[DataContractAttribute]
[KnownTypeAttribute(typeof(XPathMessageFilter))]
[KnownTypeAttribute(typeof(ActionMessageFilter))]
[KnownTypeAttribute(typeof(MatchNoneMessageFilter))]
public ref class MessageFilter abstract

JScript

public abstract class MessageFilter

MessageFilter is an abstract class that developers implement in order to specify the criteria to use for inspecting messages. Typically, filters are used by an endpoint application to determine what to do with a message based on an examination of some part of the message. A queuing process, for example, can use an XPath 1.0 query to check the priority element of a known header to determine whether to move a message to the front of the queue.

Filters are stored in a filter table that implements IMessageFilterTable<(Of <(TFilterData>)>). Each filter in the table is associated with specified filter data that can be used to indicate what actions to take if a message matches the filter. The Match methods are used to determine if a message satisfies a filter.

The criteria used by a filter cannot be changed once the filter is constructed because the filter tables have no way to detect a change. The only way to modify the criteria of a filter is to construct a new one and delete the existing filter.

The following classes implement the abstractMessageFilter class:

• XPathMessageFilter uses an XPath 1.0 expression to specify the criteria for a match.

• MatchAllMessageFilter matches all messages.

• MatchNoneMessageFilter matches none of the messages.

• ActionMessageFilter tests whether the action of a message is one of a specified set of actions.

• EndpointAddressMessageFilter tests whether a message satisfies a specified endpoint address.

ChannelListenerBase<(Of <(TChannel>)>) is an abstract base class that you can use for writing non-queuing listeners.

System..::.Object
  System.ServiceModel.Dispatcher..::.MessageFilter
    System.ServiceModel.Dispatcher..::.ActionMessageFilter
    System.ServiceModel.Dispatcher..::.EndpointAddressMessageFilter
    System.ServiceModel.Dispatcher..::.MatchAllMessageFilter
    System.ServiceModel.Dispatcher..::.MatchNoneMessageFilter
    System.ServiceModel.Dispatcher..::.PrefixEndpointAddressMessageFilter
    System.ServiceModel.Dispatcher..::.XPathMessageFilter

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

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

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

.NET Framework

Supported in: 3.5, 3.0

Reference