Question

when clicked from a link on an email, the following code causes a PDF document to open in the browser:

Response.ContentType = mime;
Response.WriteFile(path);
HttpContext.Current.ApplicationInstance.CompleteRequest();

Is there any way to force the client to open it natively in the Adobe Acrobat/reader?

Answer 1

How the client behaves depends on several things including client-side settings… you could try this

Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment; filename="+filePath); 
Response.WriteFile(path);
HttpContext.Current.ApplicationInstance.CompleteRequest();