How to detect tablet(any) requests?

Question

 if (Request.Browser.IsMobileDevice)
 {
     Response.Redirect("/mobile/Login.htm");`
 }

To detect mobiles but same times it detect Tablet like mobile, i need function that check if there Tablet or function that check the size of screen of the device.

Thank"s that work i used ScreenPixelsWidth and ScreenPixelsHeight this is the code if any need it

 int wight = Request.Browser.ScreenPixelsWidth;
                int height = Request.Browser.ScreenPixelsHeight;

                if (Request.Browser.IsMobileDevice && wight < 720 && height<1280)
            {
               Response.Redirect("/mobile/Login.htm");
            }

Answer 1

ScreenPixelsWidth always returns 640 so is not useful in detecting phones. I found this works:

public static bool IsPhoneDevice(this HttpBrowserCapabilitiesBase Browser)
{
      return (Browser.IsMobileDevice && Browser.CanInitiateVoiceCall);
}

Answer 2

I had a similar issue and tried using: HttpContext.Request.Browser.ScreenPixelsWidth

However this always returned a value of 640 pixels regardless of device (iphone or ipad). I resolved the issue by creating a static method to inspect the User Agent string instead.

public class DeviceHelper
{
    public static bool IsTablet(string userAgent, bool isMobile)
    {
        Regex r = new Regex("ipad|android|android 3.0|xoom|sch-i800|playbook|tablet|kindle|nexus");
        bool isTablet = r.IsMatch(userAgent) && isMobile;
        return isTablet;
    }
}

Then in my controller:

if(DeviceHelper.IsTablet(Request.UserAgent, Request.Browser.IsMobileDevice))
     return Redirect("..."); // redirect to tablet url

Answer 3

You can use ScreenPixelsWidth and ScreenPixelsHeight (http://msdn.microsoft.com/en-us/library/system.web.httpbrowsercapabilities.aspx) and you can define a threshold in which you consider whether the regular or the mobile version should be rendered.

There are many more ways to tackle this issue but since you are already using the HttpBrowserCapabilities class, you might as well use these 2 properties.