An Example Of Validating Text Item In Oracle Forms Using When-Validate-Item Trigger

Example is given below to validate a Text Item in Oracle Forms with specific rules condition which can be define at run time with the use of T-List item and When-Validate-Item trigger.

 

Below is the screen shot of this example form which can be download free from Google Drive with the following link: Validate.fmb

 

 

The following trigger is written in the When Validate Item trigger:

 

if :rules = 'Must Not Be Blank' then

 if nvl(:wvi,'-_-') = '-_-' then

     bell;

     Message(:rules);

     raise form_trigger_failure;

 end if;

elsif :rules = 'Can Be Blank But Can Not Have Numeric Value' then

   if length(replace(translate(:wvi, '0123456789', '          '), ' ')) < length(:wvi) then

      bell;

      Message(:rules);

       raise form_trigger_failure;

   end if;

elsif :rules = 'Must Contain @' then

     if not instr(:wvi, '@') > 0 then

        bell;

        Message(:rules);

         raise form_trigger_failure;

     end if;

elsif :rules = 'Must Contain Date Only' then

declare

d date;

Begin

  d := to_date(:wvi, 'DD-MM-YYYY');

exception

when others then

   bell;

   Message(:rules);

   raise form_trigger_failure;

end;

end if;