ColdFusion Multi Check isDefined(session)并且不为空 [英] ColdFusion Multi Check isDefined(session) and is not blank

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我想说的是，如果这是定义的并且不是空白，请显示此内容.

I am trying to say if this isDefined and is not blank show this..

<cfif (isDefined("session.checkout.info.Certificate_2")) is not "">

我也尝试过:

<cfif (isDefined("session.checkout.info.Certificate_2")) neq "">

有人请告诉我为什么当字符串为空时它仍然显示吗?

Will someone please tell me why this still shows when the string is empty?

考虑使用structKeyExists(它的开销比isDefined低)，但是您可以使用:

Consider using structKeyExists (it has lower overhead than isDefined) but here you go:

<cfif
    isDefined("session.checkout.info.Certificate_2")
    AND session.checkout.info.Certificate_2 NEQ "">

如果存在，将检查是否为空.如果不存在，则不会检查该值.

If it exists it will then check to see if it's empty. If it doesn't exist, it won't check the value.

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