form中使用委托

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有关委托

private delegate void ExecuteDirective(string str, int persistence);//定义委托
private delegate void ExecuteDirective2();//定义委托

private void ReceiveMessage(string x)
        {
            string url =  url ="D:/film/1.rmvb";//完整路径
            int persistence = 20;//播放时间
            switch (x)
            {
                case "INSERT"://插入播放
                    ExecuteDirective fInsert = new ExecuteDirective(mediaInsert);
                    this.Invoke(fInsert, new object[] { url, persistence });

//调用form中的控件方法要使用invoke来调用，否则出错
                    break;
                case "PAUSE"://暂停
                    ExecuteDirective2 fPause = new ExecuteDirective2(mediaPause);
                    this.Invoke(fPause );
                    break;
                case "PLAY"://从暂停处开始
                    ExecuteDirective2 fPlay = new ExecuteDirective2(mediaPlay);
                    this.Invoke(fPlay );
                    break;
            }
        }

private void mediaInsert(string url, int persistence)

{

axWindowsMediaPlayer1.URL = url;

}

private void mediaPause()//暂停
        {
            axWindowsMediaPlayer1.Ctlcontrols.pause();
        }
        private WMPLib.WMPPlayState mediaState()//返回播放状态
        {
            return axWindowsMediaPlayer1.playState;
        }
        private void mediaStop()//停止
        {
            axWindowsMediaPlayer1.Ctlcontrols.stop();
        }
        private void mediaPlay()//继续播放
        {
            axWindowsMediaPlayer1.Ctlcontrols.play();
        }

private void Play()//继续播放
{
//播放列表

}