open pdf toprint in new tab using javascript in asp.net c#

open pdf toprint in new tab using javascript in asp.net c#

hiexperts,
i need your help. i have a web application and i am creating a pdf using
itext sharp and trying to print it silently.
after creating the pdf i am tring to print it using the code
MemoryStream ms = new MemoryStream();
string baseUrl = Request.Url.GetLeftPart(UriPartial.Authority);
var urlPdf = Server.MapPath("~/MERGPdf/Merge_doc.pdf");
PdfReader ps = new PdfReader(urlPdf);
/*inserts js into pdf*/
PdfStamper pdf = new PdfStamper(ps, ms);
pdf.JavaScript = "this.print({bUI: false, bSilent: true, bShrinkToFit:
true});";
but my issue is, the pdf is opening in same window and the user has to
click back button to go to page.. how can avoid it..
regards,
Sivajith S.