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MessageEncoder Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

The encoder is the component that is used to write messages to a stream and to read messages from a stream.

Inheritance Hierarchy

System.Object
  System.ServiceModel.Channels.MessageEncoder

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

Syntax

'Declaration
Public MustInherit Class MessageEncoder

public abstract class MessageEncoder

The MessageEncoder type exposes the following members.

Constructors

  Name Description
Protected methodSupported by Silverlight for Windows Phone MessageEncoder Initializes a new instance of the MessageEncoder class.

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Properties

  Name Description
Public propertySupported by Silverlight for Windows Phone ContentType When overridden in a derived class, gets the MIME content type used by the encoder.
Public propertySupported by Silverlight for Windows Phone MediaType When overridden in a derived class, gets the media type value that is used by the encoder.
Public propertySupported by Silverlight for Windows Phone MessageVersion When overridden in a derived class, gets the message version value that is used by the encoder.

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Methods

  Name Description
Public methodSupported by Silverlight for Windows Phone Equals(Object) Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodSupported by Silverlight for Windows Phone Finalize Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by Silverlight for Windows Phone GetHashCode Serves as a hash function for a particular type. (Inherited from Object.)
Public methodSupported by Silverlight for Windows Phone GetProperty<T> Returns a typed object requested, if present, from the appropriate layer in the channel stack.
Public methodSupported by Silverlight for Windows Phone GetType Gets the Type of the current instance. (Inherited from Object.)
Public methodSupported by Silverlight for Windows Phone IsContentTypeSupported Returns a value that indicates whether a specified message-level content-type value is supported by the message encoder.
Protected methodSupported by Silverlight for Windows Phone MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Public methodSupported by Silverlight for Windows Phone ReadMessage(ArraySegment<Byte>, BufferManager) When overridden in a derived class, reads a message from a specified buffer.
Public methodSupported by Silverlight for Windows Phone ReadMessage(Stream, Int32) When overridden in a derived class, reads a message from a specified stream.
Public methodSupported by Silverlight for Windows Phone ReadMessage(ArraySegment<Byte>, BufferManager, String) When overridden in a derived class, reads a message from a specified stream.
Public methodSupported by Silverlight for Windows Phone ReadMessage(Stream, Int32, String) When overridden in a derived class, reads a message from a specified stream.
Public methodSupported by Silverlight for Windows Phone ToString Returns the content type that is used by the message encoder. (Overrides Object.ToString().)
Public methodSupported by Silverlight for Windows Phone WriteMessage(Message, Stream) When overridden in a derived class, writes a message to a specified stream.
Public methodSupported by Silverlight for Windows Phone WriteMessage(Message, Int32, BufferManager) Writes a message less than a specified size to a byte array buffer.
Public methodSupported by Silverlight for Windows Phone WriteMessage(Message, Int32, BufferManager, Int32) When overridden in a derived class, writes a message of less than a specified size to a byte array buffer at the specified offset.

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Remarks

MessageEncoder is a base class that provides implementations that support a Multipurpose Internet Mail Extensions (MIME) content type and message version, and defines the interface for the serialization and deserialization of messages according to that content type. Use it as a base class for writing your own custom encoder.

Use this class if you want to implement a custom message encoder. To implement your own custom message encoder, you must provide custom implementations of the following abstract base classes:

Override the Encoder to return an instance of your custom MessageEncoder. Then wire up your custom MessageEncoderFactory to the binding element stack used to configure the service or client by overriding the CreateMessageEncoderFactory method to return an instance of this factory.

The task of converting between the in-memory representation of a message and an XML Information Set (Infoset) representation that can be written to a stream is encapsulated within the MessageEncoder class, which most commonly serves as a factory for XML readers and XML writers that support specific types of XML encodings.

The key methods on MessageEncoder are WriteMessage() and ReadMessage(). WriteMessage() takes a Message object and writes it into a Stream object. ReadMessage() takes a Stream object and a maximum header size and returns a Message object.

Examples

The following code shows an example of a class that is derived from MessageEncoder.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

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