C# Using Fingerprint SDK callback “onfinger()” function built for desktop application in ASP.NET MVC 4 web application

I am writing a web application using ASP.NET MVC 4 and i need to include a real time event for pressing a finger on a fingerprint sensor ( a function "onfinger()" is triggered when a finger is put on the sensor ) , the sensor i use have an SDK and a demo example written with C# in a desktop application and it works perfectly

axCZKEM1.OnFinger += new zkemkeeper._IZKEMEvents_OnFingerEventHandler(axCZKEM1_OnFinger);

  private void axCZKEM1_OnFinger()
        {
            //RTEvent OnFinger Has been Triggered
        } 

When i try to include this code in my web application , the function doesn't trigger , i used it in a controller and even in a new background thread but nothing occurs , please help how can i include this into my ASP.NET code ?