Without copy into solution how to open pdf in asp.net

If you have the PDF file on your local machine or stored on a server you can add the path to the button's click event or in the HyperLink's NavigateUrl. You can do something as simple as the following assuming you have acrobat installed:-

Response.Redirect("~/somePDFFile.pdf");

OR

using System.Net;

string pdfPath = Server.MapPath("~/SomePDFFile.pdf");
WebClient client = new WebClient();
Byte[] buffer = client.DownloadData(pdfPath);
Response.ContentType = "application/pdf";
Response.AddHeader("content-length", buffer.Length.ToString());
Response.BinaryWrite(buffer);

Process.Start("[PDFFileName].pdf");

If pdf file is on the server then:-
http://dotnetslackers.com/community/blogs/haissam/archive/2007/04/03/Downloading-Files-C_2300_.aspx[^]