File download resuming component for use in Auto Updating

Question

Hi,

It turns out install shield doesn't support file download resuming.

Is there a .net component that provides this functionality?

Answer 1

I don't think so,but it's not that hard to write one . There are a lot of HTTP Clients already . All that you would need to do is checking to see if the web server actually supports resuming . Check this blog entry for a little info about HTTP and download resuming :

http://www.west-wind.com/WebLog/posts/244.aspx

All you would need to do is store the number of bytes read so far somewhere ( file , database ) , and read that when you're starting your application again . Be sure to check the md5 for the file ( if it has one ) , to ensure no errors occured .

Answer 2

We use the AppLife Update component. It is specifically for .NET and can resume interrupted downloads and do much more. We found it easy to use and flexible.