IE10 sending image button click coordinates with decimals (floating point values) causing a ParseInt32 FormatException

Question

It seems like ASP.NET 4.0 is not prepared to handle ImageButton events triggered by Internet Explorer 10. The problem is that IE10 sends the image click coordinates as doubl

Answer 1

Simply installing .NET Framework 4.5 can fix this problem.

This can fix the problem even if you do not switch your application pool over to .NET Framework 4.5.

In my case, I left the app pools at .NET Framework 3.5. Apparently installing .NET Framework 4.5 overwrites some files for other framework versions.

Since it is so easy to install the new .NET Framework version, it's probably worth a try before bothering with the hotfixes (which did not work for me) or other solutions.

See the workarounds section here