private void btn_Start_Click(object sender, EventArgs e)
{
if (btn_Start.Text == "开始扫码")
{
if (DeviceExist)
{
//视频捕获设备
videoSource = new VideoCaptureDevice(videoDevices[comboBox1.SelectedIndex].MonikerString);
//捕获到新画面时触发
videoSource.NewFrame += new NewFrameEventHandler(video_NewFrame);
//先关一下，下面再打开。避免重复打开的错误
CloseVideoSource();
//设置画面大小
videoSource.DesiredFrameSize = new Size(405, 305);
//启动视频组件
videoSource.Start();
btn_Start.Text = "停止扫码";
//启动定时解析二维码
Timer_DecodeImg.Enabled = true;
//启动绘制视频中的扫描线
Timer_ViewImg.Enabled = true;
Timer_DecodeImg.Start();
Timer_ViewImg.Start();
}
}
else
{
CloseVideoSource();
}
}
/// <summary>
/// 关闭摄像头组件
/// </summary>
private void CloseVideoSource()
{
Timer_DecodeImg.Stop();
Timer_ViewImg.Stop();
if (!(videoSource == null))
{
if (videoSource.IsRunning)
{
videoSource.SignalToStop();
videoSource = null;
}
}
}
private void startscan()
{
if (DeviceExist)
{
//视频捕获设备
videoSource = new VideoCaptureDevice(videoDevices[camerindex].MonikerString);
//捕获到新画面时触发
videoSource.NewFrame += new NewFrameEventHandler(video_NewFrame);
//先关一下，下面再打开。避免重复打开的错误
CloseVideoSource();
//设置画面大小
videoSource.DesiredFrameSize = new Size(405, 305);
//启动视频组件
videoSource.Start();
//启动定时解析二维码
Timer_DecodeImg.Enabled = true;
//启动绘制视频中的扫描线
Timer_ViewImg.Enabled = true;
Timer_DecodeImg.Start();
Timer_ViewImg.Start();
}
}