SoapExtension.ChainStream Method (Stream)

 

When overridden in a derived class, allows a SOAP extension access to the memory buffer containing the SOAP request or response.

Namespace:   System.Web.Services.Protocols
Assembly:  System.Web.Services (in System.Web.Services.dll)

public virtual Stream ChainStream(
	Stream stream
)

Parameters

stream
Type: System.IO.Stream

A memory buffer containing the SOAP request or response.

Return Value

Type: System.IO.Stream

A Stream representing a new memory buffer that this SOAP extension can modify.

ChainStream ensures that SOAP extensions with the highest priority can modify the actual data closest to the SOAP message sent or returned over the wire.

SOAP extensions should save references of the Stream passed into ChainStream and the Stream returned from ChainStream. If the SOAP extension is configured to run with a XML Web service method, the Stream passed into ChainStream contains the serialized SOAP request at the BeforeDeserializeSoapMessageStage. Similarily, the Stream reference returned from ChainStream is written into when the serialization occurs and thus contains the serialized SOAP response in the AfterSerializeSoapMessageStage.

The following example saves both the Stream passed into ChainStream and the Stream returned from ChainStream in the member variables oldStream and newStream, respectively.

public override Stream ChainStream( Stream stream ){
    oldStream = stream;
    newStream = new MemoryStream();
    return newStream;
}

.NET Framework
Available since 1.1
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