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Specifying the Message Body for the WCF Adapters

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You can use the Messages tab in the WCF adapters to specify how the BizTalk message body is extracted from an incoming SOAP message, and how the BizTalk message body is placed in an outgoing SOAP message.

Specifying How the BizTalk Message Body Is Extracted from an Incoming SOAP Message

You can control how to create the inbound BizTalk message body from the SOAP messages incoming through the WCF adapters. The following figures show the Messages tabs of the WCF-NetNamedPipe receive adapter and send adapter as examples.

The Messages tab in the WCF receive adapters

The Messages tab in the WCF send adapters

To specify how to create the BizTalk message body, select one of the following options in the Inbound BizTalk message body section in the preceding figures:

  • Envelope -- entire <soap:Envelope>. Uses the SOAP Envelope element of an incoming message to create the BizTalk message body part. The entire incoming message becomes the BizTalk message body. Use this option to create the BizTalk message body incorporating all the headers.

    Note

    The SOAP headers are placed in the message context, but they are not promoted automatically. Promotion can be done in a custom pipeline component.

  • Body -- contents of <soap:Body> element. Uses the content of the SOAP Body element of an incoming message to create the BizTalk message body part. If the Body element has more than one child element, only the first element becomes the BizTalk message body part.

  • Path -- content located by body path. Uses the body path expression in the Body path expression text box to create the BizTalk message body part. The body path expression is evaluated against the immediate child element of the SOAP Body element of an incoming message. When incoming messages have binary data, you can use this option for the BizTalk message body to include only the binary data without any tags.

    When the Path -- content located by body path option is selected, the Node encoding property can be configured to specify the expected encoding type for the node specified by the body path expression in the Body path expression text box. If the body path expression matches more than one element, only the first matched element is used.

Note

For the body path expression property, only the XPath expressions suitable for forward-only processing of XML are supported. For more information about the XPath expressions available for this property, see "The Best of Both Worlds: Combining XPath with the XmlReader" at https://go.microsoft.com/fwlink/?LinkID=75701.

If the Path -- content located by body path option is selected and the Node encoding property is set to String, the WCF adapters expect that the matched node has UTF-8 encoded character data. If the incoming messages include escaped character data for the XML special characters such as < and >, the WCF adapters restore the escaped character data when creating the BizTalk message body part. For example, if the matched node has escaped character data such as <FirstName>CONTOSO</FirstName> the WCF adapters create <FirstName>CONTOSO</FirstName> in the inbound BizTalk message body.

If the Path -- content located by body path option is selected and the Node encoding property is set to Hex or Base64, the matched node can have a valid BinHex or Base64 sequence. If the matched node has an invalid sequence, the WCF client receives FaultException, an error message is logged in the event log on your BizTalk Server computer, and no message is suspended.

If the Path -- content located by body path option is selected and the Node encoding property is set to XML, the WCF adapters create the BizTalk message body with the outer XML of the node selected by the body path expression in the Body path expression text box.

If the matched node does not have data encoded as specified in the Node encoding property, an empty inbound BizTalk message body is created.

For example, suppose the WCF send adapters receive the following SOAP message from WCF clients:

<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://www.w3.org/2005/08/addressing">
  <s:Header>
    <a:Action s:mustUnderstand="1">http://Microsoft.Samples.BizTalk.NetNamedPipe/OrderProcess/IOrderProcess/OrderRefresh</a:Action>
    <a:MessageID>urn:uuid:59e74507-66d0-4d50-be70-c3ec248b6f78</a:MessageID>
    <a:ReplyTo>
       <a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>
    </a:ReplyTo>
    <a:To s:mustUnderstand="1">net.pipe://mycomputer/NetNamedPipeOrderProcessServiceBizTalk</a:To>
  </s:Header>
  <s:Body>
    <Order xmlns="http://Microsoft.Samples.BizTalk.NetNamedPipe/OrderProcess">
     <OrderDetail>
       <CustomerID>CONTOSO</CustomerID>
       <OrderID>00000000</OrderID>
     </OrderDetail>
    </Order>
  </s:Body>
</s:Envelope>

If you configure the Inbound BizTalk message body section as shown in the following table, the previous incoming SOAP message becomes the inbound BizTalk message body part.

Inbound BizTalk message body Body path expression Node encoding
Envelope -- entire <soap:Envelope> N/A N/A

If you configure the BizTalk message body section as shown in the following table, the WCF adapters create the inbound BizTalk message body part to contain only the Order element in the previous incoming SOAP message.

Inbound BizTalk message body Body path expression Node encoding
Body -- contents of <soap:Body> element N/A N/A

If you configure the BizTalk message body section as shown in the following table, the WCF adapters expect that the incoming node that the body path expression matches will have UTF-8 encoded character data.

Inbound BizTalk message body Body path expression Node encoding
Path -- content located by body path /*[local-name()='Order']/*[local-name()='OrderDetail']/*[local-name()='CustomerID'] String

For the previous incoming SOAP message, the WCF adapters use the character data, CONTOSO, of the CustomerID element to create the inbound BizTalk message body part.

Note

You cannot use the abbreviated syntax of XPath, /Order/OrderDetail/CustomerID, for the previous incoming SOAP message. This is because the abbreviated syntax of XPath returns the node not declared in a namespace, and the CustomerID element in the previous SOAP message is declared in the http://Microsoft.Samples.BizTalk.NetNamedPipe/OrderProcess namespace by default namespaces.

If you configure the BizTalk message body section as shown in the following table, the CustomID element in the previous incoming SOAP message should have a valid BinHex or Base64 sequence.

Inbound BizTalk message body Body path expression Node encoding
Path -- content located by body path /*[local-name()='Order']/*[local-name()='OrderDetail']/*[local-name()='CustomerID'] Hex or Base64

If you configure the BizTalk message body section as shown in the following table, the WCF adapters create the inbound BizTalk message body for the previous incoming SOAP message as shown in the code after the table.

Inbound BizTalk message body Body path expression Node encoding
Path -- content located by body path /*[local-name()='Order']/*[local-name()='OrderDetail']/*[local-name()='CustomerID'] XML 
<CustomerID xmlns="http://Microsoft.Samples.BizTalk.NetNamedPipe/OrderProcess">CONTOSO</CustomerID>

Specifying the Source of the Outbound WCF Message Body

You can control how to create the outbound WCF message body from a BizTalk message body to send through the WCF adapters. To specify how the BizTalk message body is placed in the outbound WCF message body, you can use one of the following options in the Outbound WCF message body section on the Messages tab as shown in the figures in the previous section:

  • Body -- BizTalk response message body. Uses the BizTalk message body part to create the content of the SOAP Body element for an outgoing message. The outgoing BizTalk message body becomes the body of the outbound SOAP message.

  • Template -- content specified by template. Uses the template supplied in the XML text box to create the content of the SOAP Body element for an outgoing message. The WCF adapters with Body -- BizTalk response message body (the default value) option do not allow sending non-XML message such as character data and bitmap images. You can use the Template -- content specified by template option for the WCF adapters to send non-XML messages encoded in base64, hex, or string.

    When the Template -- content specified by template option is selected, you must provide an arbitrary template XML element in the Outbound WCF message body - XML text box. The template XML element must contain the following bts-msg-body element once and only once unless the template XML element is left empty:

<bts-msg-body xmlns="http://www.microsoft.com/schemas/bts2010" encoding="[base64|hex|string|xml]"/>

The WCF adapters encode the BizTalk message body according to the encoding attribute in the XML template, and then replace the bts-msg-body element with the encoded BizTalk message body when creating outbound WCF messages. If the Outbound WCF message body - XML text box is left empty, the WCF adapters encode the BizTalk message body in Base64, and then place the Base64 sequence in the outbound SOAP message body.

If the encoding attribute in the XML template is set to string, the WCF adapters encode the BizTalk message body part as UTF-8 encoded character data, in which the XML special characters such as < and > are escaped.

If the encoding attribute in the XML template is set to base64 or hex, the WCF adapters encode the BizTalk message body part as a BinHex or Base64 sequence.

If the encoding attribute in the XML template is set to xml, the WCF adapters replace the bts-msg-body element with the outbound BizTalk message body to create the outgoing WCF message.

For example, suppose the WCF adapters need to send the following BizTalk message body part to WCF clients:

<ns0:Order xmlns:ns0="http://Microsoft.Samples.BizTalk.NetNamedPipe/OrderProcess">
  <ns0:OrderDetail>
    <ns0:CustomerID>CONTOSO</ns0:CustomerID>
    <ns0:OrderID>01A2c</ns0:OrderID>
  </ns0:OrderDetail>
</ns0:Order>

If you configure the Outbound WCF message body section as shown in the following table, the WCF adapters create the outbound WCF messages as shown in the code after the table.

Outbound WCF message body XML
Body -- BizTalk response message body N/A 
<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://www.w3.org/2005/08/addressing">
  <s:Header>
    <a:Action s:mustUnderstand="1">http://Microsoft.Samples.BizTalk.NetNamedPipe/OrderProcess/IOrderProcess/Request</a:Action>
    <a:MessageID>urn:uuid:6a706a54-c4f5-4767-909d-a992c7c26dba</a:MessageID>
    <a:ReplyTo>
<a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>
    </a:ReplyTo>
    <a:To s:mustUnderstand="1">net.pipe://mycomputer/NetNamedPipeOrderProcessService</a:To>
  </s:Header>
  <s:Body>
    <ns0:Order xmlns:ns0="http://Microsoft.Samples.BizTalk.NetNamedPipe/OrderProcess">
  <ns0:OrderDetail>
    <ns0:CustomerID>CONTOSO</ns0:CustomerID>
    <ns0:OrderID>01A2c</ns0:OrderID>
  </ns0:OrderDetail>
</ns0:Order>
  </s:Body>
</s:Envelope>

If you configure the Outbound WCF message body section as shown in the following table, the WCF adapters create the outbound WCF messages as shown in the code after the table.

Outbound WCF message body XML
Body -- BizTalk response message body <Book><bts-msg-body xmlns="http://www.microsoft.com/schemas/bts2010" encoding="string"/></Book> 
<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://www.w3.org/2005/08/addressing">
  <s:Header>
    <a:Action s:mustUnderstand="1">http://Microsoft.Samples.BizTalk.NetNamedPipe/OrderProcess/IOrderProcess/Request</a:Action>
    <a:MessageID>urn:uuid:05dde292-eedd-467e-b0d2-f1b8f0757410</a:MessageID>
    <a:ReplyTo>
      <a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>
    </a:ReplyTo>
    <a:To s:mustUnderstand="1">net.pipe://mycomputer/NetNamedPipeOrderProcessService</a:To>
  </s:Header>
  <s:Body>
    <Book><ns0:Order xmlns:ns0="http://Microsoft.Samples.BizTalk.NetNamedPipe/OrderProcess">  <ns0:OrderDetail>    <ns0:CustomerID>CONTOSO</ns0:CustomerID>    <ns0:OrderID> 01A2c</ns0:OrderID>  </ns0:OrderDetail></ns0:Order>
    </Book>
  </s:Body>
</s:Envelope>

If you configure the Outbound WCF message body section as shown in the following table, the WCF adapters create the outbound WCF messages as shown in the code after the table.

Outbound WCF message body XML
Body -- BizTalk response message body <Book><bts-msg-body xmlns="http://www.microsoft.com/schemas/bts2010" encoding="base64"/></Book> 
<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://ww
w.w3.org/2005/08/addressing">
  <s:Header>
    <a:Action s:mustUnderstand="1">http://Microsoft.Samples.BizTalk.NetNamedPipe
/OrderProcess/IOrderProcess/Request</a:Action>
    <a:MessageID>urn:uuid:cb3cac6d-a542-4a90-bad8-cdbfa8251112</a:MessageID>
    <a:ReplyTo>
      <a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>
    </a:ReplyTo>
    <a:To s:mustUnderstand="1">net.pipe://mycomputer/NetNamedPipeOrderProcessSer
vice</a:To>
  </s:Header>
  <s:Body>
    <Book>77u/PG5zMDpPcmRlciB4bWxuczpuczA9Imh0dHA6Ly9NaWNyb3NvZnQuU2FtcGxlcy5CaX
pUYWxrLk5ldE5hbWVkUGlwZS9PcmRlclByb2Nlc3MiPg0KICA8bnMwOk9yZGVyRGV0YWlsPg0KICAgID
xuczA6Q3VzdG9tZXJJRD5DT05UT1NPPC9uczA6Q3VzdG9tZXJJRD4NCiAgICA8bnMwOk9yZGVySUQ+MD
FBMmM8L25zMDpPcmRlcklEPg0KICA8L25zMDpPcmRlckRldGFpbD4NCjwvbnMwOk9yZGVyPg==</Book
>
  </s:Body>
</s:Envelope>

If you configure the Outbound WCF message body section as shown in the following table, the WCF adapters create the outbound WCF messages as shown in the code after the table.

Outbound WCF message body XML
Body -- BizTalk response message body <Book><bts-msg-body xmlns="http://www.microsoft.com/schemas/bts2010" encoding="xml"/></Book> 
<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://www.w3.org/2005/08/addressing">
  <s:Header>
    <a:Action s:mustUnderstand="1">http://Microsoft.Samples.BizTalk.NetNamedPipe/OrderProcess/IOrderProcess/Request</a:A
ction>
    <a:MessageID>{513C123C-0600-4A1C-BEE2-EF83E0EFEB15}</a:MessageID>
    <a:ReplyTo>
      <a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>
    </a:ReplyTo>
    <a:To s:mustUnderstand="1">net.pipe://mycomputer/NetNamedPipeOrderProcessServiceBizTalk</a:To>
  </s:Header>
  <s:Body>
    <Book>
      <ns0:Order xmlns:ns0="http://Microsoft.Samples.BizTalk.NetNamedPipe/OrderProcess">
  <ns0:OrderDetail>
    <ns0:CustomerID>CustomerID_0</ns0:CustomerID>
    <ns0:OrderID>OrderID_0</ns0:OrderID>
  </ns0:OrderDetail>
</ns0:Order>
    </Book>
  </s:Body>
</s:Envelope>