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MessageFilter Class

abstract base class for different classes of filters used to query messages.

Namespace: System.ServiceModel.Dispatcher
Assembly: System.ServiceModel (in system.servicemodel.dll)

public abstract class MessageFilter
public abstract class MessageFilter
public abstract class MessageFilter
Not applicable.

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. 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:

ChannelListenerBase is an abstract base class that you can use for writing non-queuing listeners.

System.Object
  System.ServiceModel.Dispatcher.MessageFilter
     Derived Classes
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 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0
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