Checking for conditions using an IF statement

Some code should only be executed when certain conditions occur. This recipe will show you how to write code to make that decision.

How to do it...

1. Create a new codeunit from Object Designer.

2. Add the following global variables:

   Name	Type	Subtype
   SalesHeader	Record	Sales Header
   RecordsProcessed	Integer

3. Write the following code in the OnRun trigger:

   IF SalesHeader.FINDSET THEN BEGIN
   REPEAT
   RecordsProcessed += 1;
   UNTIL SalesHeader.NEXT = 0;
   MESSAGE('Processed %1 records.', RecordsProcessed);
   END ELSE
   MESSAGE('No records to process.');
   

4. Save and close the codeunit.

5. When you run the codeunit you will see a window like the one shown in the following screenshot:

   

How it works...

In order to execute the code that processes the records, there must be records in the table. That's exactly what the first line does. It tells the code that IF you find some records THEN it should do these actions. In this case, the action is to count the records in the...