WPF重写Image实现动态图片--未测试

WPF很强大，但是当WPF的image控件遇到gif时就只读了图片的第一帧，很好很强大！

WPF不屑于gif的简单动画！

幸好WPF里有MediaElement这个东西，它是对MediaPlyer的一个封装，果然很强大啊。不过另我不爽的是我这里有N个gif图片就要有N个MediaElement，要了亲命了。

还是不好，如果你能想到用WebBrowseControl来实现，或者用Frame来实现，恭喜你，你太有才了！

重写一下WPF的image，good idea！

public class GIFImageControl : System.Windows.Controls.Image

    {

        delegate void OnFrameChangedDelegate();

        private Bitmap m_Bitmap;

        public string Path { get; set; }

        BitmapSource bitmapSource;

public void AnimatedImageControl(string path)

        {

            Path = path;

            m_Bitmap = (Bitmap)Image.FromFile(path);

            Width = m_Bitmap.Width;

            Height = m_Bitmap.Height;

            ImageAnimator.Animate(m_Bitmap, OnFrameChanged);

            bitmapSource = GetBitmapSource();

            Source = bitmapSource;

}

private void OnFrameChanged(object sender, EventArgs e)

        {

Dispatcher.BeginInvoke(DispatcherPriority.Normal,

                                   new OnFrameChangedDelegate(OnFrameChangedInMainThread));

}

private void OnFrameChangedInMainThread()

        {

            ImageAnimator.UpdateFrames();

            if (bitmapSource != null)

                bitmapSource.Freeze();

            bitmapSource = GetBitmapSource();

            Source = bitmapSource;

            InvalidateVisual();

        }

//private static bool loaded;

        private BitmapSource GetBitmapSource()

        {

            IntPtr inptr = m_Bitmap.GetHbitmap();

            bitmapSource = Imaging.CreateBitmapSourceFromHBitmap(

                inptr, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());

            DeleteObject(inptr);

            return bitmapSource;

        }

[DllImport("gdi32")]

        static extern int DeleteObject(IntPtr o);

    }

转自：http://www.iteye.com/topic/1115983