How to create an array of records in BizTalk

I have an xsd type wh开发者_运维问答ich consists of some elements. One of the elements is defined like <xs:element name="Parameters" type="ParametersType" /> where ParametersType is

<xs:complexType name="ParametersType">
    <xs:sequence>
        <xs:element name="Parameter"
                    type="ParameterType"
                    minOccurs="0"
                    maxOccurs="unbounded" />
        <xs:element name="UserDefinedParameter"
                    type="xs:base64Binary"
                    minOccurs="0"
                    maxOccurs="1">
        </xs:element>
    </xs:sequence>
</xs:complexType>

That is, I have an array of Parameter type records. So I have 2 questions so far:

1. Ноw to initialize such array and how to work with it in Expression block;
2. How to tune mapping from incoming message of the same type to my message?

---

When we talk about arrays here we are really talking about nested, repeatable nodes within your message.

One solution is to decompose your array inside a loop in your orchestration.

This is not simple, but here is an example:

The code inside the various expression shapes:

Inside "Count array items"

intCountArrayItems = xpath(MyMessage, "count(XpathToParameterNodeInYourMessage)");

Inside "foreach array item"

intLoopIndex < intCountArrayItems 

Inside "Use array item"

strXPathToArrayItem = System.String.Format("XpathToParameterNodeInYourMessage[{0}]", intLoopIndex + 1);
MyXmlDocument = xpath(MyMessage, strXPathToArrayItem);
// Now you can do what you want with the xml document.

Inside "Increment loop index"

intLoopIndex = intLoopIndex + 1;

The above gives you a way to decompose an array inside your orchestration and access each of your "Paramter" types as an xml document (which you can then do stuff with).

Hope this helps.