Article
11/18/2011

MessageHeader Class

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

Represents the content of a SOAP header.

Inheritance Hierarchy

System.Object
System.ServiceModel.Channels.MessageHeaderInfo
System.ServiceModel.Channels.MessageHeader

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

Syntax

'Declaration
Public MustInherit Class MessageHeader _
    Inherits MessageHeaderInfo

public abstract class MessageHeader : MessageHeaderInfo

The MessageHeader type exposes the following members.

Constructors

	Name	Description
	MessageHeader	Initializes a new instance of the MessageHeader class.

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Properties

	Name	Description
	Actor	Gets or sets the targeted recipient of the message header. (Overrides MessageHeaderInfo.Actor.)
	IsReferenceParameter	Gets a value that specifies whether this message header contains reference parameters of an endpoint reference. (Overrides MessageHeaderInfo.IsReferenceParameter.)
	MustUnderstand	Gets or sets a value that indicates whether the header must be understood, according to SOAP 1.1 or 1.2 specification. (Overrides MessageHeaderInfo.MustUnderstand.)
	Name	Gets the name of the message header. (Inherited from MessageHeaderInfo.)
	Namespace	Gets the namespace of the message header. (Inherited from MessageHeaderInfo.)
	Relay	Gets a value that indicates whether the header should be relayed. (Overrides MessageHeaderInfo.Relay.)

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Methods

	Name	Description
	CreateHeader(String, String, Object)	Creates a new message header with the specified data.
	CreateHeader(String, String, Object, Boolean)	Creates a new message header with the specified data.
	CreateHeader(String, String, Object, XmlObjectSerializer)	Creates a header from an object to be serialized using the XmlFormatter.
	CreateHeader(String, String, Object, Boolean, String)	Creates a new message header with the specified data.
	CreateHeader(String, String, Object, XmlObjectSerializer, Boolean)	Creates a new message header with the specified data.
	CreateHeader(String, String, Object, Boolean, String, Boolean)	Creates a new message header with the specified data.
	CreateHeader(String, String, Object, XmlObjectSerializer, Boolean, String)	Creates a new message header with the specified data.
	CreateHeader(String, String, Object, XmlObjectSerializer, Boolean, String, Boolean)	Creates a new message header with the specified data.
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	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.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	IsMessageVersionSupported	Verifies whether the specified message version is supported.
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	OnWriteHeaderContents	Called when the header content is serialized using the specified XML writer.
	OnWriteStartHeader	Called when the start header is serialized using the specified XML writer.
	ToString	Converts this message header to a string. (Overrides Object.ToString().)
	WriteHeader(XmlDictionaryWriter, MessageVersion)	Serializes the header using the specified XML writer.
	WriteHeader(XmlWriter, MessageVersion)	Serializes the header using the specified XML writer.
	WriteHeaderAttributes	Serializes the header contents using the specified XML writer.
	WriteHeaderContents	Serializes the header contents using the specified XML writer.
	WriteStartHeader	Serializes the start header using the specified XML writer.

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Remarks

A message header contains optional metadata that describe a message encapsulated by the Message class.

A Message can have zero or more headers that are used as an extension mechanism to pass information in messages that are application specific. You can use Headers to add message headers to a message by calling the Add method.

Silverlight 5 provides a number of predefined message headers, as shown in the following table.

Header Name	Description
To	Contains the role that the message is targeting.
Action	Provides a description of how the message should be processed.
FaultTo	Contains the address of the node to which faults should be sent.
From	Contains the address of the node that sent the message.
Request	Indicates whether the message is a request.
MessageID	Contains the unique ID of the message.
RelatesTo	Contains the IDs of messages that are related to this message.
ReplyTo	Contains the address of the node to which a reply should be sent for a request.

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.