How does IsMobileDevice work?

Question

MSDN makes it sound so easy to detect a mobile browser:

if (Request.Browser[\"IsMobileDevice\"] == \"true\" ) 
{
    Response.Redirect(\"MobileDefault.aspx\"         


        

Answer 1

A number of *.browser files are shipped with .NET:

C:\Windows\Microsoft.NET\Framework\v2.0.50727\CONFIG\Browsers

The runtime uses regular expressions from the *.browser files to match against the incoming User-Agent string, and then sets a bunch of properties based on each match it finds (there can be several in the hierarchy).

If you need in-depth mobile device support, consider installing the MDBF, which adds support for about 400 devices:

http://mdbf.codeplex.com/