调用UserTracker.Create（）时访问冲突异常

Question

当我在NiWrapper C＃中的Start按钮单击事件中调用UserTracker.Create（）方法时，我面临访问冲突异常。 我正在尝试使用OpenNI包装器（C＃）检测骨架并调用下面给出的代码。

初始化设备后，我在buttonstart点击事件的UserTracker（）方法中传递该设备。以下是代码段：

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;
using NiTEWrapper;
using OpenNIWrapper;

namespace SkeletonTracker
{
public partial class Form1 : Form
{
    private ulong fps;
    private Bitmap image = new Bitmap(1,1);
    private ulong lastTime;
    private UserTracker userTracker;

    public Form1()
    {
        InitializeComponent();
    }

    private static bool HandleError(NiTE.Status status)
    {
        if (status == NiTE.Status.Ok)
        {
            return true;
        }

        MessageBox.Show(@"Error: " + status);
        return false;
    }

    private void DrawLineBetweenJoints(Graphics g, Skeleton skel, SkeletonJoint.JointType j1, SkeletonJoint.JointType j2)
    {
        try
        {
            if (skel.State == Skeleton.SkeletonState.Tracked)
            {
                SkeletonJoint joint1 = skel.GetJoint(j1);
                SkeletonJoint joint2 = skel.GetJoint(j2);
                if (joint1.Position.Z > 0 && joint2.Position.Z > 0)
                {
                    Point joint1PosEllipse = new Point();
                    Point joint2PosEllipse = new Point();
                    PointF joint1PosLine = this.userTracker.ConvertJointCoordinatesToDepth(joint1.Position);
                    PointF joint2PosLine = this.userTracker.ConvertJointCoordinatesToDepth(joint2.Position);
                    joint1PosEllipse.X = (int)joint1PosLine.X - 5;
                    joint1PosEllipse.Y = (int)joint1PosLine.Y - 5;
                    joint2PosEllipse.X = (int)joint2PosLine.X - 5;
                    joint2PosEllipse.Y = (int)joint2PosLine.Y - 5;
                    joint1PosLine.X -= 2;
                    joint1PosLine.Y -= 2;
                    joint2PosLine.X -= 2;
                    joint2PosLine.Y -= 2;
                    g.DrawLine(new Pen(Brushes.White, 3), joint1PosLine, joint2PosLine);
                    g.DrawEllipse(new Pen(Brushes.White, 5), new Rectangle(joint1PosEllipse, new Size(5, 5)));
                    g.DrawEllipse(new Pen(Brushes.White, 5), new Rectangle(joint2PosEllipse, new Size(5, 5)));
                }
            }
        }
        catch (Exception)
        {
        }
    }

    private void UserTrackerOnNewData(UserTracker userTracker)
    {
        if (!userTracker.IsValid)
        {
            return;
        }

        UserTrackerFrameRef frame = userTracker.ReadFrame();

        if (frame == null || !frame.IsValid)
        {
            return;
        }

        lock (this.image)
        {
            if (this.image.Width != frame.UserMap.FrameSize.Width || this.image.Height != frame.UserMap.FrameSize.Height)
            {
                this.image = new Bitmap(
                    frame.UserMap.FrameSize.Width,
                    frame.UserMap.FrameSize.Height,
                    PixelFormat.Format24bppRgb);
            }

            using (Graphics g = Graphics.FromImage(this.image))
            {
                g.FillRectangle(Brushes.Black, new Rectangle(new Point(0, 0), this.image.Size));
                foreach (UserData user in frame.Users)
                {
                    if (user.IsNew && user.IsVisible)
                    {
                        userTracker.StartSkeletonTracking(user.UserId);
                    }

                    if (user.IsVisible && user.Skeleton.State == Skeleton.SkeletonState.Tracked)
                    {
                        this.DrawLineBetweenJoints(
                            g,
                            user.Skeleton,
                            SkeletonJoint.JointType.RightHand,
                            SkeletonJoint.JointType.RightElbow);
                        this.DrawLineBetweenJoints(
                            g,
                            user.Skeleton,
                            SkeletonJoint.JointType.LeftHand,
                            SkeletonJoint.JointType.LeftElbow);

                        this.DrawLineBetweenJoints(
                            g,
                            user.Skeleton,
                            SkeletonJoint.JointType.RightElbow,
                            SkeletonJoint.JointType.RightShoulder);
                        this.DrawLineBetweenJoints(
                            g,
                            user.Skeleton,
                            SkeletonJoint.JointType.LeftElbow,
                            SkeletonJoint.JointType.LeftShoulder);

                        this.DrawLineBetweenJoints(
                            g,
                            user.Skeleton,
                            SkeletonJoint.JointType.RightFoot,
                            SkeletonJoint.JointType.RightKnee);
                        this.DrawLineBetweenJoints(
                            g,
                            user.Skeleton,
                            SkeletonJoint.JointType.LeftFoot,
                            SkeletonJoint.JointType.LeftKnee);

                        this.DrawLineBetweenJoints(
                            g,
                            user.Skeleton,
                            SkeletonJointsudo apt-get -f install.JointType.RightKnee,
                            SkeletonJoint.JointType.RightHip);
                        this.DrawLineBetweenJoints(
                            g,
                            user.Skeleton,
                            SkeletonJoint.JointType.LeftKnee,
                            SkeletonJoint.JointType.LeftHip);

                        this.DrawLineBetweenJoints(
                            g,
                            user.Skeleton,
                            SkeletonJoint.JointType.RightShoulder,
                            SkeletonJoint.JointType.LeftShoulder);
                        this.DrawLineBetweenJoints(
                            g,
                            user.Skeleton,
                            SkeletonJoint.JointType.RightHip,
                            SkeletonJoint.JointType.LeftHip);

                        this.DrawLineBetweenJoints(
                            g,
                            user.Skeleton,
                            SkeletonJoint.JointType.RightShoulder,
                            SkeletonJoint.JointType.RightHip);
                        this.DrawLineBetweenJoints(
                            g,
                            user.Skeleton,
                            SkeletonJoint.JointType.LeftShoulder,
                            SkeletonJoint.JointType.LeftHip);

                        this.DrawLineBetweenJoints(
                            g,
                            user.Skeleton,
                            SkeletonJoint.JointType.Head,
                            SkeletonJoint.JointType.Neck);
                    }
                }

                g.Save();
            }
        }

        try
        {
            this.Invoke(
            new MethodInvoker(
                delegate
                {
                    this.fps = ((1000000 / (frame.Timestamp - this.lastTime)) + (this.fps * 4)) / 5;
                    this.lastTime = frame.Timestamp;
                    this.Text = string.Format(
                        "Frame #{0} - Time: {1} - FPS: {2}",
                        frame.FrameIndex,
                        frame.Timestamp,
                        this.fps);
                    this.pb_preview.Image = this.image.Clone(
                        new Rectangle(new Point(0, 0), this.image.Size),
                        PixelFormat.Format24bppRgb);
                    frame.Release();
                }));
        }
        catch(Exception ex)
        {

        }   
    }

    private void btnStart_Click(object sender, EventArgs e)
    {
        OpenNI.Initialize();
        Device device = Device.Open(Device.AnyDevice);
        userTracker = UserTracker.Create(device); //Exception is occurred here
        HandleError(userTracker.StartPoseDetection(0, PoseData.PoseType.Psi));
        userTracker.OnNewData += UserTrackerOnNewData;    
    }

    private void btnStop_Click(object sender, EventArgs e)
    {
        NiTE.Shutdown();
        OpenNI.Shutdown();
    }
}
}