I have above issue and already resolved, and now I have three major issues.
this is table with 4 text boxes in a row and I have 20 rows there. For validation purpose, if anything in a row is filled, e.g. qty. the user must complete the rest of that rows such as description, size, and equipment value. I prefer to use asp.net control validation if possible.
my second issue is: I need to add total textbox at the bottom to show the total of equipment value, and total qty. so when the user types something in qty. the total textbox will be shown for the total number, same as equipment value.
my last issue is: i don't want to add something ' string inflatableTmp = "ctl00$ContentPlaceHolder1
" - how to fix it - calling the control without using that..