用基本C#知識實現制作一個音樂播放器

前言

寫這個博客并不是說我的作品多么高級或完美，只是希望能在一些功能方面給你們一些啟發，能幫助到你們做出真正好的程序，這就足夠了

話不多說，讓我們開始吧~~~

截圖示意

總體思路

首先呢，選擇這種無邊框窗口，我們會發現移動窗口成了問題，所以呢，就需要特意對主窗口寫事件，即按下時，移動時，松開時等各是怎樣，這個應該不難。

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Point downpoint;Point movepoint;bool ismoving;//實現鼠標控制窗口移動private void Form1_MouseDown(object sender, MouseEventArgs e){downpoint = e.Location;ismoving = true;}private void timermove_Tick(object sender, EventArgs e){}//實現鼠標控制窗口移動（2）private void mainForm_MouseMove(object sender, MouseEventArgs e){if (ismoving == true){movepoint = e.Location;this.Location = new Point(this.Location.X + (movepoint.X - downpoint.X),this.Location.Y + (movepoint.Y - downpoint.Y));}}//鼠標按鍵抬起窗口停止移動private void mainForm_MouseUp(object sender, MouseEventArgs e){ismoving = false;}

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然后就是引入WindowsMediaPlayer后我們需要實現音頻文件資源的打開，這里我設置了文件過濾器，只能打開“.MP3”“.MP4”“.flac”三種文件，同時實現了基本功能，例如點擊播放器的播放（暫停）鍵時圖標的變化、歌曲繼續、暫停等（所以我們用到一個bool型變量方便判斷）

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bool isplaying = true;string a;//歌曲總時間（字符串）//點擊播放：加載歌詞private void start_Click(object sender, EventArgs e){if (tick == 0){OpenFileDialog ofd = new OpenFileDialog();ofd.Filter = "mp3音樂|*.mp3|mp4音樂|*.mp4|flac文件|*.flac";//設置文件過濾，使之只能打開.mp3/.mp4/flac三種格式的音頻文件ofd.ShowDialog();string fileName = ofd.FileName;media.URL = fileName;media.Ctlcontrols.play();// start_Click(object sender, EventArgs e);timer2.Enabled = true;}tick = 1;timer1.Enabled = true;Encoding encode = Encoding.GetEncoding("GB2312");FileStream fs = new FileStream("陳一發兒-童話鎮.lrc", FileMode.Open);StreamReader sr = new StreamReader(fs, encode);string s = sr.ReadLine();//int xPos = 100;int yPos = 50;string a= media.currentMedia.durationString;stime.Text = a;while (s != null){s = sr.ReadLine();if(s==null){break;}if (s.Equals("")){continue;}Lyric1 lyric =new Lyric1();lyric.minute =int.Parse(s.Substring(1,2));lyric.second = int.Parse(s.Substring(4,2));lyric.lyrics = s.Substring(10);lyric.tosecond = lyric.minute * 60 + lyric.second;//if(s.Substring(10)==null)//{// lyric.sminute = Convert.ToInt32(s.Substring(1, 1));//lyric.ssecond = Convert.ToInt32(s.Substring(5, 1));// }listLyric1.Add(lyric);yPos += 30;} if (isplaying){start.BackgroundImage = Properties.Resources.play_circle_o;isplaying = false;media.Ctlcontrols.pause();timer1.Enabled = false;}else{start.BackgroundImage = Properties.Resources.pause_circle_o;isplaying = true;media.Ctlcontrols.play();timer1.Enabled = true;}fs.Close();sr.Close();}

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另一個功能有一部分也包含在上述代碼中，那就是重要的歌詞繪制（只不過上面主要只實現了歌詞文件（“.lrc”）的讀取），其實有人說用label也能顯示歌詞、甚至實現歌詞滾動、變色，可是吧…效果不太好，一方面不流暢，另一方面顯示效果也差，甚至可能有閃屏

所以我采用了GDI+繪圖實現的

注意哈，GDI+繪圖是不會自動變化的，需要窗口隱藏以至于無效化才會更新

所以我們需要寫程序使需要的區域（不一定是整個主窗口）不斷自動刷新

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Graphics g;//繪圖對象int PointY=140;int current;//主窗口繪制歌詞private void mainForm_Paint(object sender, PaintEventArgs e){g = e.Graphics;if (tick == 2){for (int i = 0; i < listLyric.Count; i++){if (i == current)g.DrawString(listLyric[i].lyrics, new Font("微軟雅黑", 17), Brushes.LightBlue, 400, PointY + i * 50);elseg.DrawString(listLyric[i].lyrics, new Font("微軟雅黑", 14), Brushes.White, 400, PointY + i * 50);}}else{for (int i = 0; i < listLyric1.Count; i++){if (i == current)g.DrawString(listLyric1[i].lyrics, new Font("微軟雅黑", 17), Brushes.LightBlue, 400, PointY + i * 50);elseg.DrawString(listLyric1[i].lyrics, new Font("微軟雅黑", 14), Brushes.White, 400, PointY + i * 50);}}}double position;//時鐘：不停調用刷新主窗口private void timer1_Tick(object sender, EventArgs e){//獲取當前歌曲播放時間position = media.Ctlcontrols.currentPosition;int a = (int)position;int m = a / 60;int s = a % 60;time1.Text = m.ToString();time2.Text = s.ToString();PointY-=1;for (int i = 0; i < listLyric.Count-1; i++){double b = listLyric[i].tosecond;double c = listLyric[i+1].tosecond;// int positioni = (int)position;if (position > b && position < c)current = i;}this.Invalidate(UpdateRect);}Rectangle UpdateRect;//主窗口刷新private void mainForm_Load(object sender, EventArgs e){UpdateRect = new Rectangle(0, 0, this.ClientSize.Width,this.ClientSize.Height - panel1.Height);}

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還有一個功能是包含在上面代碼里的

那就是歌曲總時間與現在時間的顯示，這個的話現在時間直接讀取來的時間通常是以秒為單位，我們為了顯示更加直觀，將其換算為正常的分與秒，總時間就采取直接顯示原來的字符串形式

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position = media.Ctlcontrols.currentPosition;int a = (int)position;int m = a / 60;int s = a % 60;time1.Text = m.ToString();time2.Text = s.ToString();string a = media.currentMedia.durationString;stime.Text = a;

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最后呢就是進度條怎么來的

這個我用了兩個panel，不同的寬度，不同的顏色，通過在timer里調用增加藍色panel的長度實現，這個我們要用到音頻文件總時間，從而計算出單位timer時間里長度伸展多少，來實現進度條的功能

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private void timer2_Tick(object sender, EventArgs e){a = media.currentMedia.durationString;int timm = int.Parse(a.Substring(1,1));int tims = int.Parse(a.Substring(3,2));int tim = timm * 60 + tims;sizex += (610/ tim);if(sizex<610&& isplaying==true){going.Size = new Size(sizex, 10);}}

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總體就這樣啦，不過，很多地方可能都沒說明，例如我是額外封裝了一個類 Lyric1的、還多寫了一個打開歌曲的通道，以及用tick判斷打開形式；上面涉及到的當前歌詞變大變色也沒詳細說明… … 代碼貼在下面，大家自己讀好了

代碼

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//Lyric1.csusing System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;namespace kuwo { class Lyric1 {public int minute;public int second;public int tosecond;public string lyrics;}}//Form1.cs using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.IO; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms;namespace kuwo { public partial class mainForm : Form {List<Lyric1> listLyric = new List<Lyric1>();List<Lyric1> listLyric1 = new List<Lyric1>();int tick = 0;public mainForm(){InitializeComponent();}Point downpoint;Point movepoint;bool ismoving;//實現鼠標控制窗口移動（1）private void Form1_MouseDown(object sender, MouseEventArgs e){downpoint = e.Location;ismoving = true;}private void timermove_Tick(object sender, EventArgs e){}//實現鼠標控制窗口移動（2）private void mainForm_MouseMove(object sender, MouseEventArgs e){if (ismoving == true){movepoint = e.Location;this.Location = new Point(this.Location.X + (movepoint.X - downpoint.X),this.Location.Y + (movepoint.Y - downpoint.Y));}}//鼠標按鍵抬起窗口停止移動private void mainForm_MouseUp(object sender, MouseEventArgs e){ismoving = false;}bool isplaying = true;string a;//歌曲總時間（字符串）//點擊播放：加載歌詞private void start_Click(object sender, EventArgs e){if (tick == 0){OpenFileDialog ofd = new OpenFileDialog();ofd.Filter = "mp3音樂|*.mp3|mp4音樂|*.mp4|flac文件|*.flac";//設置文件過濾，使之只能打開.mp3/.mp4/flac三種格式的音頻文件ofd.ShowDialog();string fileName = ofd.FileName;media.URL = fileName;media.Ctlcontrols.play();// start_Click(object sender, EventArgs e);timer2.Enabled = true;}tick = 1;timer1.Enabled = true;Encoding encode = Encoding.GetEncoding("GB2312");FileStream fs = new FileStream("陳一發兒-童話鎮.lrc", FileMode.Open);StreamReader sr = new StreamReader(fs, encode);string s = sr.ReadLine();//int xPos = 100;int yPos = 50;string a= media.currentMedia.durationString;stime.Text = a;while (s != null){s = sr.ReadLine();if(s==null){break;}if (s.Equals("")){continue;}Lyric1 lyric =new Lyric1();lyric.minute =int.Parse(s.Substring(1,2));lyric.second = int.Parse(s.Substring(4,2));lyric.lyrics = s.Substring(10);lyric.tosecond = lyric.minute * 60 + lyric.second;//if(s.Substring(10)==null)//{// lyric.sminute = Convert.ToInt32(s.Substring(1, 1));//lyric.ssecond = Convert.ToInt32(s.Substring(5, 1));// }listLyric1.Add(lyric);yPos += 30;} if (isplaying){start.BackgroundImage = Properties.Resources.play_circle_o;isplaying = false;media.Ctlcontrols.pause();timer1.Enabled = false;//"C#openfiledialog 設置文件過濾"}else{start.BackgroundImage = Properties.Resources.pause_circle_o;isplaying = true;media.Ctlcontrols.play();timer1.Enabled = true;}fs.Close();sr.Close();}//打開本地資源private void startplay_Click(object sender, EventArgs e){tick = 2;OpenFileDialog ofd = new OpenFileDialog();ofd.Filter = "mp3音樂|*.mp3|mp4音樂|*.mp4|flac文件|*.flac";//設置文件過濾，使之只能打開.mp3/.mp4/flac三種格式的音頻文件ofd.ShowDialog();string fileName = ofd.FileName;media.URL = fileName;media.Ctlcontrols.play();// start_Click(object sender, EventArgs e);timer2.Enabled = true;timer1.Enabled = true;Encoding encode = Encoding.GetEncoding("GB2312");FileStream fs = new FileStream("陳一發兒-童話鎮.lrc", FileMode.Open);StreamReader sr = new StreamReader(fs, encode);string s = sr.ReadLine();// int xPos = 100;int yPos = 50;string a = media.currentMedia.durationString;stime.Text = a;while (s != null){s = sr.ReadLine();if (s == null){break;}if (s.Equals("")){continue;}Lyric1 lyric = new Lyric1();lyric.minute = int.Parse(s.Substring(1, 2));lyric.second = int.Parse(s.Substring(4, 2));lyric.lyrics = s.Substring(10);lyric.tosecond = lyric.minute * 60 + lyric.second;//if(s.Substring(10)==null)//{// lyric.sminute = Convert.ToInt32(s.Substring(1, 1));//lyric.ssecond = Convert.ToInt32(s.Substring(5, 1));// }listLyric.Add(lyric);yPos += 30;}fs.Close();sr.Close();}//繪畫Graphics g;//繪圖對象int PointY=140;int current;//主窗口繪制歌詞private void mainForm_Paint(object sender, PaintEventArgs e){g = e.Graphics;if (tick == 2){for (int i = 0; i < listLyric.Count; i++){if (i == current)g.DrawString(listLyric[i].lyrics, new Font("微軟雅黑", 17), Brushes.LightBlue, 400, PointY + i * 50);elseg.DrawString(listLyric[i].lyrics, new Font("微軟雅黑", 14), Brushes.White, 400, PointY + i * 50);}}else{for (int i = 0; i < listLyric1.Count; i++){if (i == current)g.DrawString(listLyric1[i].lyrics, new Font("微軟雅黑", 17), Brushes.LightBlue, 400, PointY + i * 50);elseg.DrawString(listLyric1[i].lyrics, new Font("微軟雅黑", 14), Brushes.White, 400, PointY + i * 50);}}}double position;//時鐘：不停調用刷新主窗口private void timer1_Tick(object sender, EventArgs e){//獲取當前歌曲播放時間position = media.Ctlcontrols.currentPosition;int a = (int)position;int m = a / 60;int s = a % 60;time1.Text = m.ToString();time2.Text = s.ToString();PointY-=1;for (int i = 0; i < listLyric.Count-1; i++){double b = listLyric[i].tosecond;double c = listLyric[i+1].tosecond;// int positioni = (int)position;if (position > b && position < c)current = i;}this.Invalidate(UpdateRect);}Rectangle UpdateRect;//主窗口刷新private void mainForm_Load(object sender, EventArgs e){UpdateRect = new Rectangle(0, 0, this.ClientSize.Width,this.ClientSize.Height - panel1.Height);}int sizex = 42;private void timer2_Tick(object sender, EventArgs e){a = media.currentMedia.durationString;int timm = int.Parse(a.Substring(1,1));int tims = int.Parse(a.Substring(3,2));int tim = timm * 60 + tims;sizex += (610/ tim);if(sizex<610&& isplaying==true){going.Size = new Size(sizex, 10);}}//點擊播放private void lyricstart_Click(object sender, EventArgs e){// tick = 1;if (timer1.Enabled == true)timer1.Enabled = false;elsetimer1.Enabled = true;} } }

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總結

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