return "null" in String value in Variable

[ktrinad]

By: Ratchapong - jeng

return "null" in String value in Variable

2003-04-15 21:32

Hi,

I've problem about variable. When i leave it blank, it seem to return string "null" which cause my report not found the path that i set. How to make variable return null not "null"? in the expression of variable is somethings like this $V{path} + myReport.jasper

Please help me..

 

 

Thank in advance

Jeng

 

 

 

 

By: Giulio Toffoli - gt78

RE: return "null" in String value in Variable

2003-04-16 00:52

When a null string is catted with another not, the result is "null".

 

You can do something like this:

 

( ($V{path}==null) ? "" : $V{path}) + myReport.jasper

 

Another way is to initilize the variable, and insert into initialExpression something like this:

 

new String("")

 

Goog look

 

Giulio

 

 

 

 

By: Ratchapong - jeng

RE: return "null" in String value in Variable

2003-04-16 19:31

Hi Giulio,

The above expression is somethings like "if-condition" ?

It works like a charm, thank you Giulio.

 

 

Jeng