I have an ASP.NET webapp (on Win 2k3) that uses forms authentication. For some reason, when a user logs in with IE, the site either freezes or throws an error (such as "Could not load file or assembly 'System.Web.DataVisualization, Version=3.5.0.0").
This doesn't make any sense because I can login with Firefox and Chrome successfully.
Any ideas?
Update
Just found out this only happens when the login page is in an IFrame. IE doesn't persist the login cookie. Is there a fix for this?
Ensure you have:
.NET 3.5 SP1: http://www.microsoft.com/downloads/details.aspx?FamilyId=AB99342F-5D1A-413D-8319-81DA479AB0D7&displaylang=en
Chart Controls: http://www.microsoft.com/downloads/details.aspx?FamilyID=130f7986-bf49-4fe5-9ca8-910ae6ea442c&displaylang=en
installed on your server. It is odd that FF and Chrome are not throwing the yellow screen of death.
EDIT: For kicks, can you copy the System.Web.DataVisualization into the /bin folder of your application on the web app?
This issue actually occurred because IE does not persist cookies or sessions created within an IFrame so the ProfileCommon could not be created.
Basically what I did was add the following header before the login procedure:
HttpContext.Current.Response.AddHeader("p3p","CP=\"IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT\"");
The solution is posted here: http://adamyoung.net/IE-Blocking-iFrame-Cookies