NAV / BC - Hide Purchase Order Header based on Page Count - Only show header on first page

• There is no way to get the page numbers  from SSRS
• We have to put a line counter in the Purchase Order Report Code to calculate the number of lines per page
• then we use SSRS functions on the lines to hide based on the value of the Line Count
• We reset the line count for every PO

• Create Pagecount Global variable 
• Added to Data source to make it available to the report
• Added Pagecount := 0 in Copyloop Onpredataitem after Purchase Header
• Added Pagecount := Pagecount + 1 in Roundloop Onaftergetrecord after Purchase Line
• Our count ended up being max 18 records on the first page
• Added visibility function on SSRS row
• IIF(Pagecount <10,false,true)