Hi @Kittykat,
If you're trying to do this in an ASP.NET application, I don't think it's the right choice.
In ASP.NET you don't print anything, the user prints it. You can only open the print dialog box.
Maybe you could choose a desktop application to try, such as Windows Forms or WPF.
How to: Choose the Printers Attached to a User's Computer in Windows Forms
Best regards,
Lan Huang
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