TSC TE210 Printing extra label when print executed by application

Question

I want to print data on a label.

I created a ZPL template file and in my application i read that template file, look up a specific string, replace that string with data from my application and then send it to the printer.

When I trigger the printer over the webserver to print the template, everything is fine.

But when i trigger the print with my application, i get the desired label first AND then he prints a second label right after that, that only contains a few equally sized black bars on it and i dont know why.

This is the code that connects to my printer, interprets the label template and sends the commands for printing to the printer:

public void PrintLabel(string TemplateFile, LabelContent cont)
{
    logger.Info("Trying to print label at printer " + set.IP + " ...");

    string content;

    // read template
    content = File.ReadAllText(TemplateFile);

    // loop over all attributes 
    foreach (var prop in cont.GetType().GetProperties())
    {
        var srch = "*" + prop.Name + "*";
        var rplc = prop.GetValue(cont, null).ToString();          // simple datatype 

        logger.Trace("Trying to find/replace [" + srch + "] with [" + rplc + "]");

        content = content.Replace(srch, rplc);
    }

    var lines = content.Split(new char[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);

    // print it

    var eth = new TSCSDK.ethernet();
    if (eth.openport(set.IP, set.Port))
    {
        foreach (var l in lines)
        {
            logger.Debug("[" + set.IP + "]: prn.line: " + l);
            eth.sendcommand(l);
        }
        eth.printlabel("1", "1");
        eth.closeport();
        logger.Info("[" + set.IP + "]: Done. Label printed");
    }
    else
    {
        throw new Exception("[" + set.IP + "]: Error opening tcp connection to printer");
    }
}

Please post the actual zpl being sent to the printer. It is the only way to debug the issue. — Mark Warren
– Mark Warren, Commented 2 days ago
@MarkWarren, I resolved it by rewriting the template file in TSCs own language TSPL instead of using ZPL. — Nico Sz
– Nico Sz, Commented yesterday

Nico Sz · Accepted Answer · 2025-11-20 07:38:10Z

0

I resolved the issue by rewriting the ZPL template file in TSCs own language TSPL. The code for the printing sequence has not been adapted.

answered yesterday

Nico Sz

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