difference between "expressions"

[mhbashar1]

What is the difference between "print when expression" and "text field expression". What is used for what and HOW? Cud anybody give me an example

[itchytoes]

Hi --

 

<textFieldExpression> contains the data that you actually what to print for your text field. This is usually a field from your query result, or perhaps a calculation based on a field. Example: <textFieldExpression><![CDATA[$F{first_name}]]></textFieldExpression>

 

printWhenExpression is very useful in controlling whether a text field should be printed or not, depended upon some condition. For example, maybe you don't want to print any first names that start with 'x':

 

<reportElement x= .....>

<printWhenExpression><![CDATA[!($F{first_name}.startsWith("x"))]]></printWhenExpression>

</reportElement>

 

Betty