BizTalk™ Unleashed

Iteration

Iteration is the repeated execution of a set of actions until a desired outcome is achieved. The While shape is used to express such repetition in a business process. The repeated process, also called the while loop, continues until a rule stops the iteration. The rule is based on values of fields in the messages being processed by the schedule.

The While shape contains exactly one rule and a Continue clause. The business process you attach to the While shape's rule is called the body of the while loop. If the While rule evaluates to TRUE, the entire process, the body of the while loop, is executed, and control returns back to the While shape. An attempt to repeat the operation is then made based on the evaluation of the rule. If the ...