动态图片显示控件----------WinForm控件开发系列

PictureBox 控件无法显示gif格式的图片，该控件是继承于 Control 基类开发的。该控件利用.NET自带 ImageAnimator 类来处理图片的帧。如下：

        /// <summary>   
        /// 开始循环播放动态图片   
        /// </summary>   
        private void StartAnimation()
        {
            lock (this.Image)
            {
                ImageAnimator.Animate(this.Image, new EventHandler(this.FrameChanged));


                if (!this.DesignMode)
                {
                    this.OnFrameIndexChanged(new FrameIndexChangedEventArgs() { FrameIndex = currentFrame });
                }
            }
        }

        /// <summary>   
        /// 停止循环播放动态图片  
        /// </summary>   
        private void StopAnimation()
        {
            lock (this.Image)
            {
                ImageAnimator.StopAnimate(this.Image, new EventHandler(this.FrameChanged));
                this.resetProperty();

                if (!this.DesignMode)
                {
                    this.OnFrameIndexChanged(new FrameIndexChangedEventArgs() { FrameIndex = currentFrame });
                }
            }
        }

        /// <summary>
        /// 重置图片信息
        /// </summary>
        private void resetProperty()
        {
            this.frameDimension = null;
            this.isAnimation = false;
            this.frameCount = 0;
            this.currentFrame = -1;
        }

        /// <summary>
        /// 当前帧更改事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void FrameChanged(object sender, EventArgs e)
        {
            this.currentFrame = this.currentFrame + 1 >= this.frameCount ? 0 : this.currentFrame + 1;
            lock (this.image)
            {
                this.image.SelectActiveFrame(this.frameDimension, this.currentFrame);
                this.Invalidate();
            }
        }

 重写的方法如下

公开方法如下

新增的类如下

新增属性如下

控件库的源码已整体发布到gitee，下载地址：（花木兰控件库）https://gitee.com/tlmbem/hml