Problem Using c:when test

[Praneet Mirchandani]

Hi,

I want to check for multiple conditions using <c: when test>.

Here is what I have written:

   
<c:when test="${A != 'null' || B != 'null'}">
Some diplay
</c:when>
<c:otherwise>
Some other display
</c:otherwise>

This code never seems to go to the <c:otherwise> part even though I checked for values of A and B.
Where am I going wrong?

Thanks,
Praneet

[Devaka Cooray]

Here, 'null' is a String value. I think you are supposed to use null instead of 'null'. Isn't it?
BTW, Is this code fragment defined in the body of a <c:choose> element?

[Praneet Mirchandani]

Hi,

It is in <c:choose> element.

I tried both null and "null". It still never goes to <c:otherwise>.


Praneet

[Sony Agrawal]

Print the value of the object in the <when>.... just to make sure that the value are the way you think

[Praneet Mirchandani]

It prints a blank. So I tried this:

<c:when test="${A != '' || B != ''}">   
Some diplay   
</c:when>   
<c:otherwise>   
Some other display   
</c:otherwise>

Even this doesnt go to the <c:otherwise> element.

[Bear Bibeault]

Do you really not indent your code?

Why are you not using the empty operator?

And I assume that this construct is inside a <c:choose> action?

[Praneet Mirchandani]

I do intent my code and this part is in<c:choose>. Probably didnt copy it properly.

I tried using not empty.

<c:when test="${(not empty (StringA)) or (not empty (String B))}"

This did not work. Do I have to use StringA.value instead?

[Bear Bibeault]

ItDoesntWorkIsUseless

What is happening?

[Praneet Mirchandani]

Basically it never evaluates the <c:otherwise> element when the <c:when test> condition is false.