How do I get the MIME type of a file being requested in ASP.NET C#?

Question

I would like to handle requests differently depending upon the MIME type. For example, I have PDF\'s, images and other media files that I would like to prohibit access to ba

Answer 1

I had a similar problem a few month ago and solved it with this simple wrapper-class around System.Web.MimeMapping (as mentioned by Richard Szalay):

/// 

/// This class allows access to the internal MimeMapping-Class in System.Web
/// 
class MimeMappingWrapper
{
    static MethodInfo getMimeMappingMethod;

    static MimeMappingWrapper() {
        // dirty trick - Assembly.LoadWIthPartialName has been deprecated
        Assembly ass = Assembly.LoadWithPartialName("System.Web");
        Type t = ass.GetType("System.Web.MimeMapping");

        getMimeMappingMethod = t.GetMethod("GetMimeMapping", BindingFlags.Static | BindingFlags.NonPublic);
    }

    /// 

    /// Returns a MIME type depending on the passed files extension
    /// 
    /// File to get a MIME type for
    /// MIME type according to the files extension
    public static string GetMimeMapping(string fileName) {
        return (string)getMimeMappingMethod.Invoke(null, new[] { fileName });
    }
}