c# - How to get the file size from http headers -

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i want size of http:/.../file before download it. file can webpage, image, or media file. can done http headers? how download file http header?

yes, assuming http server you're talking supports/allows this:

system.net.webrequest req = system.net.httpwebrequest.create("http://stackoverflow.com/robots.txt"); req.method = "head"; using (system.net.webresponse resp = req.getresponse()) {     int contentlength;     if(int.tryparse(resp.headers.get("content-length"), out contentlength))     {          //do useful contentlength here      } }

if using head method not allowed, or content-length header not present in server reply, way determine size of content on server download it. since not particularly reliable, servers include information.


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