Question

我想测试一个解决方案：从本地摄像头捕获图像数据，然后显示！

这是我的控制者：

public class DevController : Controller
{
    public byte[] Pixels = null;
    Bitmap _bmp = new Bitmap(480, 272, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
    Graphics _g = null;       
    System.Timers.Timer _timer = new System.Timers.Timer(1000);

    public ActionResult Index()
    {
        if (_g == null)            
            _g = Graphics.FromImage(_bmp);

        _g.Clear(Color.Black);
        _g.FillRectangle(Brushes.Blue, 2, 2, 65, 31);
        _g.DrawString("hello ", new Font("Arial", 15f), Brushes.Yellow, new PointF(5f, 5f));

        MemoryStream ms = new MemoryStream();
        _bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);

        Pixels = ms.ToArray();

        _timer.AutoReset = true;
        _timer.Enabled = true;
        _timer.Elapsed += _timer_Elapsed;
        return View(this);
    }
}

使用Timer更新模型数据：

void _timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
    if (_g == null)
    {
        _g = Graphics.FromImage(_bmp);
    }

    _g.Clear(Color.Black);
    _g.FillRectangle(Brushes.Red, 2, 2, 65, 31);
    _g.DrawString(string.Format("hello :{0}", id++), new Font("Arial", 15f), Brushes.Yellow, new PointF(5f, 5f));

    MemoryStream ms = new MemoryStream();
    _bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);         
    Pixels = ms.ToArray();
}

查看代码

<img src="data:image/bmp;base64,@System.Convert.ToBase64String(Model.Pixels)" id="u_image" />

问题是：当Pixels在时间发生变化时，视图如何自动更改？

更新模型数据更改时的视图（不是数据库）

0 个答案: