asp.net - Preloader while generating PDF using response object -

i generating pdf using response object. code renders html pdf. pdf generation time not fixed, want show preloader process (processing/loading) during time using ajax.

when start pdf generation process on button click, start preloader process, after completion of pdf getting generated, preloader process not getting stopped.

also, suppose want clear data in textboxes on page, not getting cleared.

what need solve these problems.

here code:

dim response system.web.httpresponse = system.web.httpcontext.current.response response.clear() response.clearheaders() response.clearcontent() response.contenttype = "application/pdf" response.appendheader("content-disposition", "attachment; filename=" + me.txtreportsetpdfname.text.replace(" ", "_") + ".pdf") response.appendheader("content-length", filelen(sfilepath).tostring) response.writefile(sfilepath) 

are using

response.end(); 

if yes, need textbox clearing , stopping loader before call

response.end(); 

hope helps. don't forget upvote if solves problem. thanks.. :)