print txt file from web application

I am attempting to print to a zebra printer through a web application, the template file is in my application \PrintingTemplates\AddressLabelTemplate. In the txt file I have written in ZPL II the codes for the printer and need the client computers to be able to print the file with a few mods. The file has 3 lines where textbox entries need to replace @PARAM1@ ect. I have no idea where to start can anybody help?
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