You can solve your issue by using two methods. 1> you have to create window service, deploy it and install it on server 2> you have to create SQL Job n upload it on server Hope this solution will help you

Please try as below Textbox.Text.ToString("0.00"); Hope this will work for you.

You can place the dropdown list and the control you want to change onselectedindexchanged in update panel control, but place the upload control outside the update panel. it will surely work for you.

if your site is hosted on server then you can create window service and If your database and site hosted on same server and if you have access of SA of site then you can run sql job as well for this. Hope this will help you. :)