WPF - 从另一个线程更新"System.Windows.Controls.Image"

Question

我在该代码上得到了这个例外.怎么解决？

Excepton:

调用线程无法访问此对象,因为另一个线程拥有它.

码:

    void CamProc_NewTargetPosition(IntPoint Center, System.Drawing.Bitmap image)
    {
        IntPtr hBitMap = image.GetHbitmap();
        BitmapSource bmaps = Imaging.CreateBitmapSourceFromHBitmap(hBitMap, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());

        Dispatcher.BeginInvoke((Action)(() =>
        {
            labelX.Content = String.Format("X: {0}", Center.X); //OK Working
            labelY.Content = String.Format("Y: {0}", Center.Y); //OK Working
            pictureBoxMain.Source = bmaps; // THERE IS EXCEPTON
        }), DispatcherPriority.Render, null);

    }

pictureBoxMain是System.Windows.Controls.Image.

Answer 1

您可以冻结BitmapSource,以便可以从任何线程访问它:

void CamProc_NewTargetPosition(IntPoint Center, System.Drawing.Bitmap image)
    {
        IntPtr hBitMap = image.GetHbitmap();
        BitmapSource bmaps = Imaging.CreateBitmapSourceFromHBitmap(hBitMap, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
        bmaps.Freeze();

        Dispatcher.BeginInvoke((Action)(() =>
        {
            labelX.Content = String.Format("X: {0}", Center.X);
            labelY.Content = String.Format("Y: {0}", Center.Y);
            pictureBoxMain.Source = bmaps;
        }), DispatcherPriority.Render, null);

    }