gistfile1.txt

public class BaseReportPage<TModel> : BaseViewPage<TModel>, IViewBase where TModel : class
{
     // ...
 
protected override void OnPreInit(EventArgs e)
    {
        if (ShowAsPdf)
        {
         string path = _configuration.GetPrincePath();
         var prince = new Prince(path);
            prince.SetBaseURL(Request.Url.AbsoluteUri);
prince.AddStyleSheet(Server.MapPath("~/css/Styles.css"));
prince.AddStyleSheet(Server.MapPath("~/css/ReportModules/Redefinitions.css"));
         prince.SetLog("prince.log");
 
Response.Clear();
            Response.Filter = new PrinceFilter(prince, Response.Filter);
            Response.AddHeader("Content-Type", "binary/octet-stream");
            Response.AddHeader("Content-Disposition", "attachment; filename=Report.pdf;");
        }
        base.OnPreInit(e);
    }
}