Kinect WPF C# Program to count number of joints tracked in a body.

MainWinodw.xaml

<Window x:Class="_32905277.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <TextBox Name="textBox" HorizontalAlignment="Left" Height="23" Margin="200,100,0,0" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Width="125"/>

    </Grid>
</Window>

MainWndow.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Microsoft.Kinect;

namespace _32905277
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        KinectSensor kinectSensor;
        MultiSourceFrameReader msfr;
        Body[] bodies;
        
        public MainWindow()
        {
            InitializeComponent();

            kinectSensor = KinectSensor.GetDefault();
            kinectSensor.Open();

            bodies = new Body[6];


            msfr = kinectSensor.OpenMultiSourceFrameReader(FrameSourceTypes.Body);
            msfr.MultiSourceFrameArrived += msfr_MultiSourceFrameArrived;


        }

        void msfr_MultiSourceFrameArrived(object sender, MultiSourceFrameArrivedEventArgs e)
        {
            MultiSourceFrame msf = e.FrameReference.AcquireFrame();

            if (msf == null) return;

            using (BodyFrame bf = msf.BodyFrameReference.AcquireFrame())
            {
                bf.GetAndRefreshBodyData(bodies);
                int numTrackedJoints;

                for (int i = 0; i < bodies.Length; i++)
                {
                    if (bodies[i].IsTracked)
                    {
                        numTrackedJoints = countTrackedJoints(bodies[i].Joints);
                        textBox.Text = numTrackedJoints.ToString();
                    }
                }
            }
            
        }

        public static int countTrackedJoints(IReadOnlyDictionary<JointType, Joint> joints)
        {
            int count = 0;
            foreach (var joint in joints)
            {
                if (joint.Value.TrackingState == TrackingState.Tracked) count++;
            }
            
            return count;
        }        
    }
}