earlier developer had put code using label , turned hyperlink during run time.
<asp:label id="lbl_attachment" runat="server"> </asp:label> lbl_attachment.text = "<a href='../uploads/" + ds_row["attachment"].tostring() + "'>" + ds_row["attachment"].tostring() + "</a>"; but not working. changed code following open file (image/pdf/word) in new browser tab , error persists:
hyperlinkappdoc.navigateurl = resolveurl("../uploads/" + ds_row["attachment"].tostring()); hyperlinkappdoc.target = "_blank"; 
what can fix issue? mime types available in iis.
update: trying out different approach. server.mappath poiting @ local drive instead of wwwroot. how can point path wwwroot folder?
string pdfpath = server.mappath("~/somefile.pdf"); webclient client = new webclient(); byte[] buffer = client.downloaddata(pdfpath); response.contenttype = "application/pdf"; response.addheader("content-length", buffer.length.tostring()); response.binarywrite(buffer);
you have used asp.hyperlink. following
<asp:hyperlink id="hyperlink1" navigateurl="<set_from_code_behind>" text="text redirect" runat="server"/>
and set navigateurl code behind following.
hyperlink1.navigateurl= "uploads/" + ds_row["attachment"].tostring();
