C# Winform WindowsMediaPlayer控制項

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要做一個視頻無縫切換的程式，所謂無縫就是在一個視頻結束時立即開始另一個視頻，中間不要有切換的黑屏

實現思路是放兩個wmp播放控制項，其中每個時刻只有一個在播放，另外一個處於暫停狀態，並隱藏

當一個視頻播放完後，切換顯示另一個視頻，同時這個視頻隱藏起來並載入下一段視頻，視頻載入完成後（wmp會有事件通知）暫停

這樣就去除了載入時的短暫空擋

有時可能會有鍵盤滑鼠事件影響wmp的狀態，所以使用定時器雖然監測wmp的播放狀態

private void Form1_Load(object sender, EventArgs e)        {            timer1.Enabled = true;            wmp1.URL = ConfigurationManager.AppSettings["File1Path"];            wmp2.URL = ConfigurationManager.AppSettings["File1Path"];            playnow = 1;            wmpnow = 1;            wmp1.Visible = true;            wmp2.Visible = false;            wmp1pause = 0;            wmp2pause = 0;                    }

 private bool isFullScreen = false;        private int playnow = 1;        private int wmp1pause = 0;        private int wmp2pause = 0;        private int wmpnow = 1;        private void timer1_Tick(object sender, EventArgs e)        {                        if (wmp1.Ctlcontrols.currentPosition == 0)                wmp1.Ctlcontrols.play();            else            {                if (wmp1.Ctlcontrols.currentPosition > 0 && wmp1pause==0 && wmpnow==2)                {                    if (playnow == 2)                    {                        wmp1.Visible = true;                        wmp1.settings.volume = wmp2.settings.volume;                        wmpnow = 1;                        playnow = 1;                        wmp2.Visible = false;                        wmp2.Ctlcontrols.stop();                        wmp2pause = 0;                    }                    else                        wmp1.Ctlcontrols.pause();                    wmp1pause = 1;                }                if (wmp1.currentMedia.duration - wmp1.Ctlcontrols.currentPosition < 0.05)                {                    wmpnow = 2;                    wmp2.Visible = true;                    wmp2.settings.volume = wmp1.settings.volume;                    wmp2.Ctlcontrols.play();                                        wmp1.Visible = false;                    wmp1.Ctlcontrols.stop();                    wmp1.URL = ConfigurationManager.AppSettings["File1Path"];                    wmp1pause = 0;                }            }            if (wmp2.Ctlcontrols.currentPosition == 0)                wmp2.Ctlcontrols.play();            else            {                if (wmp2.Ctlcontrols.currentPosition > 0 && wmp2pause == 0 && wmpnow==1)                {                    if (playnow == 2)                    {                        wmp2.Visible = true;                        wmp2.settings.volume = wmp1.settings.volume;                                                wmpnow = 2;                        playnow = 1;                        wmp1.Visible = false;                        wmp1.Ctlcontrols.stop();                        wmp1pause = 0;                    }                    else                        wmp2.Ctlcontrols.pause();                    wmp2pause = 1;                }                if (wmp2.currentMedia.duration - wmp2.Ctlcontrols.currentPosition < 0.05)                {                    wmpnow = 1;                    wmp1.Visible = true;                    wmp1.settings.volume = wmp2.settings.volume;                                        wmp1.Ctlcontrols.play();                                        wmp2.Visible = false;                    wmp2.Ctlcontrols.stop();                    wmp2.URL = ConfigurationManager.AppSettings["File1Path"];                    wmp2pause = 0;                }            }                    }