Question

i need to download a big data from the server,because the data is so big,i am not able to download it at a time,do you have any idea?Thanks you very much.

Answer 1

If the server supports it, you can use HTTP byte ranges to request specific parts of the file.

This page describes HTTP byte range requests:
http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.1

The following code creates a request which will ask to skip the first 100 bytes, but return the rest of the file:

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(@"http://example.com/somelargefile");
request.Headers.Add("Range", "bytes=100-");