KTV Song System Playback principle

Peking University Jade Bird KTV song system playing principle

Instructor--Yuana Yuming

1. First know there are two classes (PlayList Song)

There is one method in the playlist class

public static bool Addsong (song song)

{

BOOL success = false;//Record added song is successful

for (int i = 0; i < songlist.length; i++)

{

Find the first null position in the array

if (songlist[i] = = null)

{

Songlist[i] = song;

Success = true;

Break

}

}

return success;

}

2. Place the selected song object into an array in the playlist class

Song song = new Song ();

Song. Songname = Dgvsong.selectedrows[0]. cells["Songname"]. Value.tostring (); record the current song

Song. Songurl =ktvunit.songpath+ "\ \" + dgvsong.selectedrows[0]. cells["Songurl"]. Value.tostring ();

MessageBox.Show (song. Songurl);

Playlist.addsong (song);

3. Timer control in Frmmian 1s enable=true tick click event

If (player1.playstate==vmpplayer.stopped)

{

Song=null;

Playlist.moveon ();//When the song plays to the last second of the moment, play the next song

}

4. Public static void MoveOn ()

{

if (Songlist[songindex]! = null && Songlist[songindex]. Playstate = = Songplaystate.again)

If the currently playing song is not empty and the status is replay

{

Songlist[songindex]. Setsongplayed ();//status changed to broadcast

}

Else

{

songindex++;//Execute + + to play the next song

}

}

5. Public void SongList () '

{

LvSong.Items.Clear ();

for (int i = 0; i < PlayList.SongList.Length; i++)

{

if (playlist.songlist[i]!=null)

{

ListViewItem item = new ListViewItem ();

Item. Text = Playlist.songlist[i]. Songname;

Item. Tag = i;

String playstate = Playlist.songlist[i]. Playstate = = songplaystate.unplayed? "Not played": "Broadcast";

Item. SubItems.Add (playstate);

LVSONG.ITEMS.ADD (item);

}

}

}

KTV Song System Playback principle