How to Disable or Prevent a .Pdffile from being printed or d

Question

hi Developers ,

i want to disable or prevent a .Pdf file on browser .

in my project i am opening a .Pdf from database to new tab . now i want to Disable Printable or Download from the End user. because all attachments are govt property and valuables.

this is my code for open a .Pdf file on a new tab .

protected void Button1_Click(object sender, EventArgs e)

{

SqlConnection con = Connection.DBConn();

string str = "SELECT KeyFactsFileName FROM tbl_question where id='" + sno + "' and status='A'";

SqlDataAdapter sda = new SqlDataAdapter(str, con);

DataSet ds = new DataSet();

sda.Fill(ds);

string path = ds.Tables[0].Rows[0]["KeyFactsFileName"].ToString();

string urlName = Request.Url.AbsoluteUri;

urlName = urlName.Remove(urlName.LastIndexOf("/"));

string url = string.Format("{0}/Files/{1}", urlName, path);

string script = "<script type='text/javascript'>window.open('" + url + "')</script>";

this.ClientScript.RegisterStartupScript(this.GetType(), "script", script);

}

how can i done this task , could anyone know please suggest me to how can i done this task

thanking with

Paul.S