Question

我有一个应用程序将屏幕截图发送到需要在WPF窗口中显示的另一个应用程序除了每次添加新背景时代码在内存中建立的唯一问题之外，它的效果很好。

我该如何解决这个问题？

谢谢！

  private void GetSnapshots(object state)
    {
        using (var socket=new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp))
        {

            socket.Connect(new IPEndPoint(IPAddress.Parse("10.0.0.9"), 8081));
            while (Connected)
            {


                    var lengthData = new byte[4];
                    var lengthBytesRead = 0;
                    while (lengthBytesRead < lengthData.Length)
                    {
                        var read = socket.Receive(lengthData, lengthBytesRead, lengthData.Length - lengthBytesRead, SocketFlags.None);
                        if (read == 0) return;
                        lengthBytesRead += read;
                    }
                    var length = BitConverter.ToInt32(lengthData, 0);
                    var imageData = new byte[length];
                    var imageBytesRead = 0;
                    while (imageBytesRead < imageData.Length)
                    {
                        var read = socket.Receive(imageData, imageBytesRead, imageData.Length - imageBytesRead, SocketFlags.None);
                        if (read == 0) return;
                        imageBytesRead += read;
                    }

                    using (var stream = new MemoryStream(imageData))
                    {
                        var bitmap = new Bitmap(stream);
                        Dispatcher.Invoke(new ImageCompleteDelegate(ImageComplete), new object[] { bitmap });
                        stream.Dispose();
                        bitmap.Dispose();
                    }

            }
            socket.Disconnect(false);
        }
    }

    public static System.Windows.Media.Brush CreateBrushFromBitmap(Bitmap bmp)
    {
        return new ImageBrush(Imaging.CreateBitmapSourceFromHBitmap(bmp.GetHbitmap(), IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions()));
    }
    private delegate void ImageCompleteDelegate(Bitmap bitmap);
    private void ImageComplete(Bitmap bitmap)
    {
        if (_buffer != null)
        {
            _buffer = null;
        }
        _buffer = new Bitmap(bitmap);
        bitmap.Dispose();
        //ScreenShotG is a Grid Element inside the XAML
        ScreenShotG.Background = CreateBrushFromBitmap(_buffer);
    }

Answer 1

经过数小时的研究和测试后，我终于修复了它。问题出现在以下代码中：

public static System.Windows.Media.Brush CreateBrushFromBitmap(Bitmap bmp)
{
    return new ImageBrush(Imaging.CreateBitmapSourceFromHBitmap(bmp.GetHbitmap(), IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions()));
}

解决方案是：

public static System.Windows.Media.Brush CreateBrushFromBitmap(Bitmap bmp)
{
     IntPtr hBitMap = bmp.GetHbitmap();
     ImageBrush b = new ImageBrush(Imaging.CreateBitmapSourceFromHBitmap(hBitMap, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions()));
     DeleteObject(hBitMap);
     return b;
}

内存泄漏加载imagebrush到grid.background

1 个答案: