Printing in one click.I don't want print setup dialogue box.

Hello Vivek,

Could you please see the following link:
Printing Using C# - Changing the Page Settings[^]

I have taken following code from it.
Printing Without the Preview

To print to another printer, you have to use the standard print dialog. We can bring this up in much the same way, so add this method to PrintEngine:

// ShowPrintDialog - display the print dialog...
public void ShowPrintDialog()
{
  // create and show...
  PrintDialog dialog = new PrintDialog();
  dialog.PrinterSettings = PrinterSettings;
  dialog.Document = this;
  if(dialog.ShowDialog() == DialogResult.OK)
  {
    // save the changes...
    PrinterSettings = dialog.PrinterSettings;

    // do the printing...
    Print();
  }
}

Again, if the user clicks OK we save the settings, but this time we also call Print to print directly to the configured printer. Add this event handler to Form1 to finish this off:

private void cmdPrint_Click(object sender, System.EventArgs e)
{
  // print...
  _engine.ShowPrintDialog();
}

For Mozilla : http://forums.mozillazine.org/viewtopic.php?t=48336

Javascript Code:
it will work for IE

if (navigator.appName == "Microsoft Internet Explorer")
{
var PrintCommand = '<object id="PrintCommandObject" width="0" height="0<br" mode="hold" />CLASSID="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2">';
document.body.insertAdjacentHTML('beforeEnd', PrintCommand);
PrintCommandObject.ExecWB(6, -1); PrintCommandObject.outerHTML = "";
}
else {
window.print();
}

You should learn the command language your target printer supports (e.g. ESC/P, ZPL, EPL, etc) to get fast printing performance and then use any of these tools to print at client side without dialog or create one by yourself

qzprint[^]: free or paid options. requires JAVA VM at the client
WebClientPrint[^]: paid, requires jQuery & ASP.NET