Question

I have a ASP.NET web application that creates a text file report and then redirects to the file.

Response.Redirect(strFileName);

The problem is it seems that IE9 does something different in regards to caching. If I generate two reports, IE9 always displays the first one generated. I have to do a CTRL+F5 to see the updated file. This problem doesn’t occur on any other browser.

I have tried adding commands to change the caching to no avail.

Response.Cache.SetNoStore();
Response.Cache.SetCacheability(HttpCacheability.NoCache);

I would like to preserve the functionality of generating a text file for recording purposes. One solution is to dump all the information from the text file onto the page and avoid the Response.Redirect, but this seems like more of a hack than a real fix. Is there any way to force IE to reload the text file?

Answer 1

You could use something like version.

string strFileName = GetReportUrl();
string version = GetCurrentReportVersion(); // - or to use DateTime.Now.ToString();
string url = string.Format("{0}?v={1}", strFileName, version);

Response.Redirect(url);

In that case browsers will always use last report version.