Expression in BarCode component
I need to assign a value to a TfrxBarCOdeView component using the Expresion property.
A simple expression like <MyDataset."INVOICENUMBER"> works fine. But I need to concatenate this data with a string for a result like this F123 (where 123 is the Invoice Number.
Whatever syntax I try I always get an variant convertion error or similar.
Could you tell me how to format the expression ?