Im与C#共同开展一个项目。 该方案从一个连接的网络运动中获取图像,并通过Socket将其发送到Pi/iPad。 所有这些工作都很出色,我能够成功地看到我的行踪。

But when the client disconnects, the webcam has to get turned off and in this function, the program just hangs up. No error messages and no exception calls...just hangs! I believe it s a problem with multiple threads but unfortunately I m not as experienced in C# to find a solution. I hope someone here can bring me on the right track...

Code:
onImageCaptured function:

public void OnImageCaptured(Touchless.Vision.Contracts.IFrameSource frameSource, Touchless.Vision.Contracts.Frame frame, double fps)
{
    _latestFrame = frame.Image;
    Console.WriteLine("OnImageCaptured");
    if (isConnected)
    {
        Console.WriteLine("OnImageCaptured - isConnected");
        byteArray = new byte[0];
        MemoryStream stream = new MemoryStream();

        _latestFrame.Save(stream, System.Drawing.Imaging.ImageFormat.Jpeg);
        stream.Close();
        byteArray = stream.ToArray();

        if (byteArray.Length > 0)
        {
            string eof = "<EOF>";
            byte[] eofByte = Encoding.ASCII.GetBytes(eof);
            Console.WriteLine("OnImageCaptured - sendStream");
            this.onDataSend(byteArray);
            this.onDataSend(eofByte);
            stream.Flush();
        }

        System.Diagnostics.Debugger.Log(0, "1", "
Byte Array Length: " + byteArray.Length.ToString());
    }
    pictureBoxDisplay.Invalidate();
}

象照相机级一样:

public event EventHandler<CameraEventArgs> OnImageCaptured;

触发:

OnImageCaptured.Invoke(this, new CameraEventArgs(bitmap, fps));

因此,这一功能——我相信的话——面临一种单独的威胁,因为当图像出现时,不阻挡统一。

因此,在这一职能中处理客户脱节问题:

public void onDataSend(byte[] data)
{
    clientReady = false;
    try
    {
        socketWorker.Send(data);
    }
    catch (SocketException se)
    {
        isConnected = false;
        Console.WriteLine("Error: Data Write - SocketException");
        Console.WriteLine(se.ErrorCode.ToString());
        thrashOldCamera() // THIS FUNCTION HANGS THE PROGRAM !!
        onDisconnectServer();

        // onDisconnectServer();
    }
    catch (ObjectDisposedException)
    {
        isConnected = false;
        Console.WriteLine("Error: Data Write - ObjectDisposedException");
        // onDisconnectServer();
    }

}

用户脱节,thrashOldCamera()。 至今为止的工程罚款! 现在:

private void thrashOldCamera()
{
    Console.WriteLine("TrashOldCamera");
    // Trash the old camera
    if (_frameSource != null)
    {
        try
        {
            _frameSource.NewFrame -= OnImageCaptured;
            Console.WriteLine("TrashOldCamera - 1");
            _frameSource.Camera.Dispose(); // HERE IT HANGS. IT NEVER GOES PAST HERE !!!
            Console.WriteLine("TrashOldCamera - 2");
            setFrameSource(null);
            Console.WriteLine("TrashOldCamera - 3");
            pictureBoxDisplay.Paint -= new PaintEventHandler(drawLatestImage);
        }
        catch (Exception ex)
        {
            Console.WriteLine("End Trash Camera Ex: " + ex);
        }
    }
    Console.WriteLine("End Trash Camera");
}

The program hangs at _frameSource.Camera.Dispose();. As stated above, there s no error or exception. It may be a problem that onDataReceive() gets called within the onImageCapture function(). I also added a button to the form that triggers thrashOldCamera() and this works perfectly.

任何帮助/帮助都得到真正赞赏。