[英]How to fix "System.ObjectDisposedException" when closing a form in winform application
I want to play a video in openGL using openTK.我想使用 openTK 在 openGL 中播放视频。 It is working fine.
它工作正常。 but when closing that particular form it throws an exception "System.ObjectDisposedException: 'Cannot access a disposed object.'" under the code "while (glControl1.IsIdle)".
但是当关闭该特定表单时,它会在代码“while (glControl1.IsIdle)”下引发异常“System.ObjectDisposedException:'无法访问已处理的对象。'”。 How can I resolve it?
我该如何解决? My app contains a 'Form1'.
我的应用程序包含一个“Form1”。 When user clicks a button on it, a 'Form2' will open as new window.
当用户单击其上的按钮时,“Form2”将作为新窗口打开。 This Form2 will play video in openGL.
这个 Form2 将在 openGL 中播放视频。
private void Form2_Load(object sender, EventArgs e)
{//openGL code
StartCameras();
glControl1.Resize += new EventHandler(glControl1_Resize);
glControl1.Paint += new PaintEventHandler(glControl1_Paint);
Application.Idle += Application_Idle;
// Ensure that the viewport and projection matrix are set correctly.
glControl1_Resize(glControl1, EventArgs.Empty);
}
private void Application_Idle(object sender, EventArgs e)
{
while (glControl1.IsIdle)
{
Render();
}
}
private void Form2_FormClosing(object sender, FormClosingEventArgs e)
{
StopCameras();
}
private void StopCameras()
{
timer.Stop();
videoSourcePlayer1.SignalToStop();
videoSourcePlayer1.WaitForStop();
}
What about checking if it's disposed?:如何检查它是否已处理?:
while (!glControl1.IsDisposed && glControl1.IsIdle)
Assuming it inherits from the WinForms Control
class, it should implement IsDisposed
.假设它继承自 WinForms
Control
类,它应该实现IsDisposed
。
Try this if it could work.试试这个,如果它可以工作。
private void Application_Idle(object sender, EventArgs e) {
try {while (glControl1.IsIdle)
{
Render();
}
}
Catch(Exception ex)
//print the ex
}
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