如何在BizTalk Busienss Rule Engine中检测空/ null？

问题描述

我有一条消息，有一个名为prize的部分，它可能有0到n。

  < Prize>

    < PrizeCode> POINTS< / PrizeCode>

    < Description>停车场积分< / Description>

    < Group> Y< / Group>

    < IsHeld> true< / IsHeld>

  < / Prize>

  < Prize>

    < PrizeCode> Credit< / PrizeCode>

    < Description> Carpark Credit< / Description>

    < Group> Y< / Group>

    < IsHeld> false< / IsHeld>

  < / Prize>

如何在商业规则引擎中设置条件以检查是否有任何奖品IsHeld = true，可能没有奖品部分，或者有奖品但是没有奖品的IsHeld = true。

有点像XSLT中的计数。

我可以在业务规则引擎中执行此操作吗？

谢谢

解决方案

I have a message, there is a section called prize, it could have 0 to n.

  <Prize>
    <PrizeCode>POINTS</PrizeCode>
    <Description>Carpark Points</Description>
    <Group>Y</Group>
    <IsHeld>true</IsHeld>
  </Prize>

  <Prize>
    <PrizeCode>Credit</PrizeCode>
    <Description>Carpark Credit</Description>
    <Group>Y</Group>
    <IsHeld>false</IsHeld>
  </Prize>

How can I set up a condition in Business Rule Engine to check if there is any Prize has IsHeld=true, there could be no Prize section, or there are prize sections but none of the prize has IsHeld=true.

Kind of like a count in XSLT.

Can I do this in Business Rule Engine?

Thank you

解决方案

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