Issues sending raw print to printer on save.

I am tied up right not for too much detail.  But have a look at their test page https://demo.qz.io/

View the source and think of each button as it's own module which you have already tested.   Your next step is to take just one portion of it an make it work using only html.

Let's look at the Print EPL button. It has an onClick call to printEPL().  Just look for that in the code by viewing the source.

Looks like this is it.

***************************************************************************
 * Prototype function for printing raw EPL commands
 * Usage:
 *    qz.append('\nN\nA50,50,0,5,1,1,N,"Hello World!"\n');
 *    qz.print();
 ***************************************************************************/
function printEPL() {
    if (notReady()) { return; }

    // Send characters/raw commands to qz using "append"
    // This example is for EPL.  Please adapt to your printer language
    // Hint:  Carriage Return = \r, New Line = \n, Escape Double Quotes= \"
    qz.append('\nN\n');
    qz.append('q609\n');
    qz.append('Q203,26\n');
    qz.append('B5,26,0,1A,3,7,152,B,"1234"\n');
    qz.append('A310,26,0,3,1,1,N,"SKU 00000 MFG 0000"\n');
    qz.append('A310,56,0,3,1,1,N,"QZ PRINT APPLET"\n');
    qz.append('A310,86,0,3,1,1,N,"TEST PRINT SUCCESSFUL"\n');
    qz.append('A310,116,0,3,1,1,N,"FROM SAMPLE.HTML"\n');
    qz.append('A310,146,0,3,1,1,N,"QZINDUSTRIES.COM"\n');
    qz.appendImage(getPath() + 'assets/img/image_sample_bw.png', 'EPL', 150, 300);

    // Automatically gets called when "qz.appendImage()" is finished.
    window['qzDoneAppending'] = function() {
        // Append the rest of our commands
        qz.append('\nP1,1\n');

        // Tell the applet to print.
        qz.print();

        // Remove reference to this function
        window['qzDoneAppending'] = null;
    };
}

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Get that to work.  Delete all the other code except what you need like the functions for qz.print(); and qz.append etc. and now get this to work only using html/js  (by the way, it is javascript, not java, two different things)

Next to last step is get this to work using asp.  This is the long part because you will need to response.write all of this out.  Remember that asp and vbscript run on on the server.  HTML, CSS and Javascript render in the browser from data sent by the server. Therefor, your asp code can generate your html and javscript, but not the other way around.

You are going to have to go through each line and covert it to one long string then output the string.

I  won't do it all but assume the entire code is made up of these two lines of javascript.

<script>
 qz.append('\nN\n');
 qz.append('q609\n');
</script>

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<%
myJS = "<script>"
myJs = myJs &"qz.append('\nN\n');"
myJs = myJs &"qz.append('q609\n');"
myJs = myJs &"</script>"

response.write myJs
%>

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Above code will send js code to the browser just as if you hand typed it.

<%
var1 = "q609"
myJS = "<script>"
myJs = myJs &"qz.append('\nN\n');"
myJs = myJs &"qz.append('"&var1&"');"
myJs = myJs &"</script>"

response.write myJs
%>

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Above will print out the same thing but we used a variable.  

Your best bet is to start with what works and keep building like I have here until you get it working fully on the fly.