how i can make Nop 1.9 " .aspx " seo friendly url ?

i have site developed on nopcommerce 1.9 and almost %50 of code and system changed for our business type and update to new nopcommerce versions are not easy  so how we can make good performance on seo ?

how i can make Nop 1.9 " .aspx " seo friendly url ?  www.sitename.com/category/productname

Not sure about your website, but the URL re-writer for IIS 7 and above is pretty good.

You can write regular expressions to check the incoming URL and redirect it to another location.

i use standart nop commerce 1.9 version and all our urls end with ".aspx"  and i read on internet that it will be problem for seo , and wanted to change our site urls

What you can do is set up a URL RULE

1. Look for

www.yoursite.com/products/GreenBlueDidget

2. Rewrite to

www.yoursite.comGreenBlueDidget.aspx

This will solve your issues. I did the same on this website www.handyhardware.ie

Declan