问题
I have an e-commerce web application and I'd some how like to make that print to a label printer for the back end stuff
I have two questions
1) I can't print from a normal webpage straight to the printer (A zedbra LP2844 i think) it just throws out junk
2) I want to be able to print labels to the label printer, but all other printing, such as invoices would go to the default printer - a laser, so need someway of selecting the right printer
It will all happen at a fixed location, so I can insist on for example using Firefox with a specific (custom?) plugin installed (already using firefox so this would be a neat way)
Does anybody know if this is possible, is a firefox extention a possible and/or good way of doing this?
Anybody out there that can write ff plugins?
I would presume this must have been done before surely, but cannot find anything on google
Thanks for any help
Dave
回答1:
Surely the label printer comes with a Windows driver? Then it might be enough to produce pages with the right dimensions in the browser using CSS or, if that won't work out, a PDF.
You can use "cm" or "in" units in your CSS for the label printer; you should be able to set page dimensions and orientation in Firefox's print dialog .
回答2:
As much as I can see there are Windows drivers for this particular printer. Printing shouldn't be a problem after you install them.
回答3:
Thanks for your comments people, I've actually come up with a different solution which comes at the problem from a different angle as selecting the correct printer would likely always be an issue
At the moment we have a windows program that we enter the order number into, it then draws a label and prints it out, but its not pretty and getting changes done to the layout is difficult but more than anything I want the ability to print from the webpage
So what I'm planning is this -
Update the program so it sits in the background and polls the database for a list of orders to be printed, for each order it finds, request an image from the server and print that image to the label
On the server, an image is created on the fly using ASPJpeg which gives me full control over how the label looks
From the webapp, I then have a button on the order to print, this adds the order to a print table... I can then have an interface to the print table which shows whats waiting to print, whats been printed etc, and I can clear the print queue or delete individual items from it just as if it were the windows print queue
Only problem I'm worried about is polling often enough that staff aren't waiting for labels to print and not polling too often that too much bandwidth is being used up
I might make it so that when they hit despatch it sends the label to be printed, or some other existing function that ties into the order process
来源：https://stackoverflow.com/questions/1821461/how-can-i-print-to-a-label-printer-from-a-web-page