c# - .Net HttpResponse transmitFile eventListener or progressCallback? -


i'm using httpresponse.transmitfile on iis .net application downloading large files. wondering if there's event listener or progress callback can attach transmitfile method or response, server know progress of download, , abort if necessary?

i can think of way of artificially chunking file , flush response per chunk, i'm little worried performance.

long chunksize = 65536; while (checkcontinue()) {     if (index >= filelength)         break;     if (index<filelength && index + chunksize> filelength)     {         context.response.transmitfile(fulltarget, index, filelength - index);         context.response.flush();         break;     }      context.response.transmitfile(fulltarget, index, chunksize);     context.response.flush();     index += chunksize; }

any suggestions? in advance.


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