转眼之间，已经到了2016年，即新的一年了！S1也结束了，收获的也不多 ，想想最后留给大家的就一个KTV项目了。
希望大家看时有所收获
现在我们一起来看KTV前台管理
主界面的运行效果：
主要代码：
1 2 private void MainForm_Load(object sender, EventArgs e) 3 { 4 // 加载时，运行播放窗体 5 FrmPlay playForm = new FrmPlay(); 6 playForm.Show(); 7 8 // 启动定时器 9 this.timer1.Start(); 10 11 // 读取资源路径12 DBHelper dbHelper = new DBHelper(); 13 string sql = "select resource_path from resource_path where resource_type = 'singer_photo'"; 14 SqlCommand command = new SqlCommand(sql, dbHelper.Connection); 15 16 // 读取歌手照片路径 17 try 18 { 19 dbHelper.OpenConnection(); 20 KTVUtil.singerPhotoPath = command.ExecuteScalar().ToString(); 21 } 22 catch (Exception ex) 23 { 24 MessageBox.Show("资源路径发生错误！", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error); 25 } 26 finally 27 { 28 dbHelper.CloseConnection(); 29 } 30 31 // 读取歌曲路径 32 sql = "select resource_path from resource_path where resource_type = 'song'"; 33 command.CommandText = sql; 34 try 35 { 36 dbHelper.OpenConnection(); 37 KTVUtil.songPath = command.ExecuteScalar().ToString(); 38 } 39 catch (Exception ex) 40 { 41 MessageBox.Show("路径错误", MessageBoxButtons.OK, MessageBoxIcon.Error); 42 } 43 finally 44 { 45 dbHelper.CloseConnection(); 46 } 47 } 1 ///2 /// 显示当前播放的歌曲名字3 /// 4 public void ShowPlayingSongName()5 {6 this.lblPlayingSong.Text = PlayList.PlayingSongName();7 this.lblNextSong.Text = PlayList.NextSongName();8 }
同一窗体显示不同界面
如果在一个窗体中显示不同的界面呢？
我们可以转换一下思路，所谓界面不同就是容器不同
解决方案：通过控制Form窗体中ListView控件的显示和隐藏来实现多界面窗体
歌星点歌的运行效果：
点击第一个LIstView，弹出第二个ListView解析：1.隐藏第一个ListView，显示第二个ListView 的代码
1 // 点击后，显示歌手类别 2 private void lvOrder_Click(object sender, EventArgs e) 3 { 4 if (lvOrder.SelectedItems[0] != null) 5 { 6 // 隐藏歌手性别，显示歌手类别 7 pnlSingerSex.Visible = false; 8 pnlSingerType.Location = pnlSingerSex.Location; 9 pnlSingerType.Dock = DockStyle.Fill; 10 pnlSingerType.Visible = true; 11 this.singerSex = Convert.ToString(lvOrder.SelectedItems[0].Tag); // 记录选择的性别 12 } 13 14 // 读取歌手类别 15 DBHelper dbHelper = new DBHelper(); 16 string sql = "select * from singer_type"; 17 try 18 { 19 // 查询数据库 20 SqlCommand command = new SqlCommand(sql, dbHelper.Connection); 21 dbHelper.OpenConnection();//相当于con.open 22 SqlDataReader reader = command.ExecuteReader(); 23 24 // 循环将类别读取出来添加到ListView中 25 lvSingerType.Items.Clear(); 26 int i = 0; 27 while (reader.Read()) 28 { 29 ListViewItem item = new ListViewItem(); 30 item.Text = Convert.ToString(reader["singertype_name"]); 31 item.Tag = Convert.ToInt32(reader["singertype_id"]); 32 item.ImageIndex = i; 33 lvSingerType.Items.Add(item); 34 i++; 35 } 36 reader.Close(); 37 } 38 catch (Exception ex) 39 { 40 Console.WriteLine(ex.Message); 41 MessageBox.Show("错误！"); 42 43 } 44 finally 45 { 46 dbHelper.CloseConnection(); 47 } 48 } 需要将【男歌手】汉字传递到第二个ListView上 显示5个国家的信息（包括文本和图片）
需要将【男歌手】汉字传递到第二个ListView上 .显示5个国家的信息（包括文本和图片）
点击第二个ListVIew，填出第三个ListView
效果：
// 点击类别后，显示对应类别下的歌手列表 private void lvSingerType_Click(object sender, EventArgs e) { // 隐藏歌手类别，显示歌手列表 pnlSingerType.Visible = false; pnlSingerList.Location = pnlSingerSex.Location; pnlSingerList.Dock = DockStyle.Fill; pnlSingerList.Visible = true; this.singerTypeId = Convert.ToInt32(lvSingerType.SelectedItems[0].Tag); // 保存选中的类别编号 // 读取数据库，读出歌手信息 DBHelper dbHelper = new DBHelper(); StringBuilder sql = new StringBuilder(); sql.AppendFormat("select singer_id,singer_name,singer_photo_url from singer_info where singertype_id={0} and singer_gender='{1}'", this.singerTypeId,this.singerSex); try { SqlCommand command = new SqlCommand(sql.ToString(),dbHelper.Connection); dbHelper.OpenConnection(); SqlDataReader reader = command.ExecuteReader(); int imageIndex = 0; // 代表歌手头像的索引 ilSinger.Images.Clear(); // 循环读出歌手信息添加到窗体中显示 lvSinger.Items.Clear(); while (reader.Read()) { // 将歌手头像放在ImageList控件中 string photoURL = KTVUtil.singerPhotoPath + "\\" + Convert.ToString(reader["singer_photo_url"]); ilSinger.Images.Add(Image.FromFile(photoURL)); // 将歌手添加到ListView中 ListViewItem item = new ListViewItem(); item.Text = Convert.ToString(reader["singer_name"]); item.Tag = Convert.ToString(reader["singer_id"]); item.ImageIndex = imageIndex; lvSinger.Items.Add(item); imageIndex++; } reader.Close(); } catch (Exception ex) { Console.WriteLine(ex.Message); MessageBox.Show("错误！"); } finally { dbHelper.CloseConnection(); } } 第三个ListView出来后，点击其中的一个歌手，弹出该歌手演唱的所有歌曲 效果：
-
1 // 点击歌手姓名，打开歌曲列表窗口 2 private void lvSinger_Click(object sender, EventArgs e) 3 { 4 // 读取数据库，读出该歌手的所有歌曲 5 DBHelper dbHelper = new DBHelper(); 6 StringBuilder sb = new StringBuilder(); 7 sb.AppendFormat("select song_id,song_name, singer_name='{0}',song_url from song_info where singer_id={1}", 8 lvSinger.SelectedItems[0].Text, Convert.ToInt32(lvSinger.SelectedItems[0].Tag)); 9 10 FrmSongList songList = new FrmSongList(); 11 songList.Sql = sb.ToString(); 12 songList.Previous = PrevioisForm.Singer; // 指定返回的窗体是按歌手点歌 13 songList.Show(); 14 this.Close(); 15 }
我们都知道ListView绑定首列的数据是通过
1 ListViewItem lvitem = new ListViewItem(stuno); 2 显示地区图片的代码： SqlDataReader dr = command.ExecuteReader(); 3 4 5 6 // 循环将类别读取出来添加到ListView中 7 8 lvlisttwo.Items.Clear(); 9 10 int i = 0;11 12 while (dr.Read())13 14 { 15 16 ListViewItem item = new ListViewItem(); 17 18 item.Text = Convert.ToString(dr["singertype_name"]); 19 20 item.Tag = Convert.ToInt32(dr["singertype_id"]); 21 22 item.ImageIndex = i; 23 24 lvlisttwo.Items.Add(item); 25 26 i++; 27 28 } 29 30 dr.Close(); 详细分析：
显示歌手的图片的代码
1 SqlDataReader dr = cmd.ExecuteReader(); 2 3 int imageIndex = 0; // 代表歌手头像的索引 4 5 imglistthree.Images.Clear(); 8 9 // 循环读出歌手信息添加到窗体中显示10 11 lvlistthree.Items.Clear();12 13 while (dr.Read())14 15 {16 17 // 将歌手头像放在ImageList控件中18 19 string photoURL = KTVUtil.singerPhotoPath + "\\" + Convert.ToString(dr["singer_photo_url"]); 20 21 imglistthree.Images.Add(Image.FromFile(photoURL)); 24 25 // 将歌手添加到ListView中 26 27 ListViewItem item = new ListViewItem(); 28 29 item.Text = Convert.ToString(dr["singer_name"]); 30 31 item.Tag = Convert.ToString(dr["singer_id"]); 32 33 item.ImageIndex = imageIndex; 34 35 lvlistthree.Items.Add(item); 36 37 38 39 imageIndex++; 40 41 } 42 43 dr.Close(); 44 45 } ListView控件首列不能居中问题
我也没找到解决方法，能做的，也许就是把第一列宽度设为 0，不用第一列，从第二列开始用。
此时 ListView1.Items[i].Text 也不能用了，因为它对应的是 ListView1[i].SubItems[0].Text。
设置ToolStrip对应项图片的大小，通过ImageScalingSize来设置。
04.Panel不能实现同一窗体不同界面。
17. 实现播放歌曲功能
01.点击某歌曲后，将选择的歌曲添加到已点列表
02.在已点列表中放入一个Timer控件，实时检测每首歌曲的状态
03.在播放窗口中放入一个Timer控件，实时检测需要播放的歌曲
1 private void PlayForm_Load(object sender, EventArgs e) 2 { 3 this.PlaySong(); 4 this.timer1.Start(); 5 } 6 7 /// 8 /// 播放歌曲 9 /// 10 private void PlaySong() 11 { 12 this.song = PlayList.GetPlayingSong(); // 获取当前要播放的歌曲 13 if (song != null) 14 { 15 this.song.SetSongPlayed(); // 将当前歌曲播放状态设为已播放 16 this.wmpSong.URL = KTVUtil.songPath + "\\" + this.song.SongURL; // 得到当前播放歌曲的路径 17 } 18 } 19 20 private void timer1_Tick(object sender, EventArgs e) 21 { 22 if(this.song == null) 23 { 24 this.PlaySong(); 25 } 26 if (this.wmpSong.playState == WMPLib.WMPPlayState.wmppsStopped) 27 { 28 this.song = null; // 将歌曲设为空 29 PlayList.MoveOn(); 30 } 31 // 切歌 32 if (this.song != null && this.song.PlayState == SongPlayState.cut) 33 { 34 this.wmpSong.URL = ""; 35 this.song = null; 36 } 37 } 实现播放列表操作：
1.KTVUtil 类：
1 class KTVUtil2 3 {4 5 public static string singerPhotoPath = ""; // 歌手照片路径6 7 public static string songPath = ""; // 歌曲路径8 9 } 2.编写歌曲类（Song）
1 代码例子：enum SongPlayState 2 3 { 4 5 unplayed, played, again, cut 6 7 } 8 9 // 歌曲类10 11 class Song12 13 { 14 15 //歌曲名称 16 17 public string SongName 18 19 { 20 21 get { return songName; } 22 23 set { songName = value; } 24 25 } 26 27 //歌曲存放路径 28 29 public string SongURL 30 31 { 32 33 get { return songURL; } 34 35 set { songURL = value; } 36 37 } 38 39 // 歌曲播放状态 40 41 internal SongPlayState PlayState 42 43 { 44 45 get { return playState; } 46 47 set { playState = value; } 48 49 } 50 51 private string songName; 52 53 private string songURL; 54 55 // 歌曲播放状态,默认为未播放状态 56 57 private SongPlayState playState = SongPlayState.unplayed; 58 59 //将歌曲状态改为已播放 60 61 public void SetSongPlayed() 62 63 { 64 65 this.playState = SongPlayState.played; 66 67 } 68 69 // 将歌曲状态改为再拨放一次 70 71 public void SetPlayAgain() 72 73 { 74 75 this.playState = SongPlayState.again; 76 77 } 78 79 // 将歌曲状态改为切歌 80 81 public void SetSongCut() 82 83 { 84 85 this.playState = SongPlayState.cut; 3.编写播放列表类（PlayList），提供播放列表的各种方法
代码例子：// 播放列表管理
1 2 class PlayList 3 4 { 5 6 // 歌曲播放列表数组 7 8 private static Song[] songList = new Song[50]; 9 10 // 当前播放的歌曲在数组中的索引 11 12 private static int songIndex = 0; 13 14 // 播放列表数组 15 16 public static Song[] SongList 17 18 { 19 20 get { return PlayList.songList; } 21 22 } 23 24 //当前播放歌曲的索引 25 26 public static int SongIndex 27 28 { 29 30 get { return PlayList.songIndex; } 31 32 } 33 34 // 当前播放的歌曲名称 35 36 public static string PlayingSongName() 37 38 { 39 40 string songName = ""; // 歌曲名称 41 42 if (SongList[SongIndex] != null) 43 44 { 45 46 songName = SongList[SongIndex].SongName; 47 48 } 49 50 return songName; 51 52 } 53 54 //获取当前播放的歌曲 55 56 public static Song GetPlayingSong() 57 58 { 59 60 if (SongList[songIndex] != null) 61 62 { 63 return SongList[songIndex]; 64 } 65 66 else 67 68 { 69 return null; 70 71 } 72 73 } 74 75 //下一首要播放的歌曲名称 76 77 public static string NextSongName() 78 79 { 80 81 string songName = ""; // 歌曲名称 82 83 if (SongList[SongIndex + 1] != null) 84 85 { 86 songName = SongList[SongIndex + 1].SongName; 87 } 88 return songName; 89 90 } 91 92 93 94 // 点播,及添加播放,一首歌曲 95 96 public static bool AddSong(Song song) 97 98 { 99 100 //默认为没有添加播放歌曲 101 102 bool success = false; 103 104 //for遍历Song[], 105 106 for (int i = 0; i < SongList.Length; i++) 107 { 108 if (SongList[i] == null) 109 110 { 111 112 SongList[i] = song; 113 114 // Console.WriteLine(song.SongName); 115 116 //返回要播放的歌曲, 117 118 success = true; 119 120 break; 121 } 122 } 123 return success; 124 125 } 126 // 切歌 要切歌曲的编号，如果是切当前播放的歌曲传入-1 127 128 public static void CutSong(int index) 129 130 { 131 132 int i; // 循环变量，代表切歌的位置 133 134 if (index == -1) 135 136 { 137 i = SongIndex; 138 } 139 else 140 { 141 i = index; // 从切歌的位置开始，将歌曲逐个向前移一个位置 142 } 143 SongList[i].SetSongCut(); 144 while (SongList[i] != null) 145 { 146 SongList[i] = SongList[i + 1]; 147 i++; 148 // 如果到达数组最后一个元素，就将最后一个元素指向空 149 if (i == SongList.Length) 150 { 151 SongList[i] = null; 152 } 153 154 } 155 156 } 157 // 重放当前歌曲 158 public static void PlayAgain() 159 { 160 if (SongList[songIndex] != null) 161 { 162 SongList[songIndex].SetPlayAgain(); 163 } 164 } 165 // 播放下一首 166 public static void MoveOn() 167 168 { 169 if (SongList[songIndex] != null && SongList[songIndex].PlayState == SongPlayState.again) 170 { 171 SongList[songIndex].SetSongPlayed(); 172 } 173 else 174 { 175 songIndex++; 176 177 } } 去Time控件：在Tick事件中写代码
代码例子： // 定时扫描歌曲列表，显示当前播放歌曲的名称
1 private void PlaySong() 2 3 { 4 this.song = PlayList.GetPlayingSong(); // 获取当前要播放的歌曲 5 6 if (song != null) 7 { 8 9 this.song.SetSongPlayed(); // 将当前歌曲播放状态设为已播放10 this.Winplaymedia.URL = KTVUtil.songPath + "\\" + this.song.SongURL; // 得到当前播放歌曲的路径11 12 }13 14 } 15 private void timer1_Tick(object sender, EventArgs e) 16 17 { 18 19 // 在文本框中显示当前播放的歌曲名字 20 21 this.txtplay.Text = PlayList.PlayingSongName(); 22 23 this.txtnextsong.Text = PlayList.NextSongName(); 24 25 if (this.song == null) 26 27 { 28 this.PlaySong(); 29 } 30 31 if (this.Winplaymedia.playState == WMPLib.WMPPlayState.wmppsStopped) 32 33 { 34 35 this.song = null; // 将歌曲设为空 36 37 PlayList.MoveOn(); 38 39 } 40 41 // 切歌 42 43 if (this.song != null && this.song.PlayState == SongPlayState.cut) 44 45 { 46 47 this.Winplaymedia.URL = ""; 48 49 this.song = null; 50 51 } 在Load时中启动计时器：
代码例子:
this.time.Start();
01:切歌：
1 代码例子： DialogResult re = MessageBox.Show("确定要切歌吗?", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);2 3 if (re == DialogResult.OK)4 5 {6 7 PlayList.CutSong(-1);8 9 } 02：重唱：
代码例子：
1 PlayList.PlayAgain();2 3 PlaySong();4 5
移动窗体的代码：
1 private Point mouseOffset; //记录鼠标指针的坐标 2 3 private bool isMouseDown = false; //记录鼠标按键是否按下 4 5 private void pnlon_MouseDown(object sender, MouseEventArgs e) 6 7 { 8 9 int xOffset;10 11 int yOffset;12 13 if (e.Button == MouseButtons.Left)14 15 { 16 xOffset = -e.X - SystemInformation.FrameBorderSize.Width; 17 18 yOffset = -e.Y - SystemInformation.CaptionHeight - SystemInformation.FrameBorderSize.Height; 19 20 mouseOffset = new Point(xOffset, yOffset); 21 22 isMouseDown = true; 23 24 } 25 26 } 27 private void pnlon_MouseMove(object sender, MouseEventArgs e) 28 29 { 30 if (isMouseDown) 31 32 { 33 Point mousePos = Control.MousePosition; 34 35 mousePos.Offset(mouseOffset.X + 5, mouseOffset.Y + 30); 36 Location = mousePos; 37 38 } 39 40 } 41 42 43 44 private void pnlon_MouseUp(object sender, MouseEventArgs e) 45 46 { 47 // 修改鼠标状态isMouseDown的值 48 49 // 确保只有鼠标左键按下并移动时，才移动窗体 50 51 if (e.Button == MouseButtons.Left) 52 53 { 54 55 isMouseDown = false; 56 57 } 58 59 } 60 拼音点歌
1 // 查询歌曲显示在窗体中 2 private void btnSearch_Click(object sender, EventArgs e) 3 { 4 DBHelper dbHelper = new DBHelper(); 5 DataSet dataSet = new DataSet(); 6 StringBuilder sb = new StringBuilder(); 7 sb.Append("select song_id,song_name,singer_name,song_url from song_info inner join singer_info on singer_info.singer_id=song_info.singer_id "); 8 sb.AppendFormat("where song_name like '%{0}%' or song_ab like '{0}'",this.txtSongName.Text); 9 10 Console.WriteLine(sb.ToString()); 11 12 SqlDataAdapter adapter = new SqlDataAdapter(sb.ToString(), dbHelper.Connection); 13 14 // 清空当前列表 15 if (dataSet.Tables["songList"] != null) 16 { 17 dataSet.Tables["songList"].Clear(); 18 } 19 20 adapter.Fill(dataSet, "songList"); 21 this.dgvSong.DataSource = dataSet.Tables["songList"]; 22 } 23 24 private void tsbtnExit_Click(object sender, EventArgs e) 25 { 26 this.Close(); 27 } 28 29 private void dgvSong_CellClick(object sender, DataGridViewCellEventArgs e) 30 { 31 if (dgvSong.SelectedRows[0].Cells["songName"]!=null) 32 { 33 // 创建一个歌曲对象，并将当权选中的歌曲名和路径赋给该对象 34 Song song = new Song(); 35 song.SongName = dgvSong.SelectedRows[0].Cells["songName"].Value.ToString(); 36 song.SongURL = dgvSong.SelectedRows[0].Cells["songURL"].Value.ToString(); 37 PlayList.AddSong(song); 38 39 // 更新数据库，将选中的歌曲点播次数加1 40 int songId = Convert.ToInt32(dgvSong.SelectedRows[0].Cells["songId"].Value); 41 string sql = string.Format("update song_info set song_play_count=song_play_count+1 where song_id={0}", songId); 42 DBHelper dbHelper = new DBHelper(); 43 try 44 { 45 SqlCommand command = new SqlCommand(sql, dbHelper.Connection); 46 dbHelper.OpenConnection(); 47 command.ExecuteNonQuery(); 48 } 49 catch (Exception ex) 50 { 51 Console.WriteLine(ex.Message); 52 MessageBox.Show("错误！"); 53 } 54 finally 55 { 56 dbHelper.CloseConnection(); 57 } 58 } 59 } 实现分类点歌功能
1 // 窗体加载时，显示歌曲类别 2 private void OrderBySongTypeForm_Load(object sender, EventArgs e) 3 { 4 // 读取歌曲类别 5 DBHelper dbHelper = new DBHelper(); 6 string sql = "select * from song_type"; 7 try 8 { 9 // 查询数据库10 SqlCommand command = new SqlCommand(sql, dbHelper.Connection); 11 dbHelper.OpenConnection(); 12 SqlDataReader reader = command.ExecuteReader(); 13 14 // 循环将类别读取出来添加到ListView中 15 this.lvSongType.Items.Clear(); 16 int i = 0; 17 while (reader.Read()) 18 { 19 ListViewItem item = new ListViewItem(); 20 item.Text = Convert.ToString(reader["songtype_name"]); 21 item.Tag = Convert.ToInt32(reader["songtype_id"]); 22 item.ImageIndex = i; 23 this.lvSongType.Items.Add(item); 24 i++; 25 } 26 reader.Close(); 27 } 28 catch (Exception ex) 29 { 30 Console.WriteLine(ex.Message); 31 MessageBox.Show("cuowu！"); 32 33 } 34 finally 35 { 36 dbHelper.CloseConnection(); 37 } 38 } 39 40 private void lvSongType_Click(object sender, EventArgs e) 41 { 42 // 读取数据库，读出该歌手的所有歌曲 43 DBHelper dbHelper = new DBHelper(); 44 StringBuilder sb = new StringBuilder(); 45 sb.Append("select song_id,song_name, singer_name,song_url from song_info inner join singer_info on song_info.singer_id=singer_info.singer_id "); 46 sb.AppendFormat("where songtype_id={0}",Convert.ToInt32(lvSongType.SelectedItems[0].Tag)); 47 Console.WriteLine(sb.ToString()); 48 FrmSongList songList = new FrmSongList(); 49 songList.Sql = sb.ToString(); 50 songList.Previous = PrevioisForm.SongType; 51 songList.Show(); 52 this.Close(); 53 } 字数点歌
1 private void OrderByWordCountForm_Load(object sender, EventArgs e) 2 { 3 // 将字数列表添加到窗体中 4 for (int i = 0; i < 12; i++) 5 { 6 // 循环生成字数项添加到窗体中 7 ListViewItem item = new ListViewItem(); 8 item.Text = (i + 1)+"个字"; 9 item.Tag = i + 1; 10 lvWordCount.Items.Add(item); 11 } 12 13 } 14 15 private void lvWordCount_Click(object sender, EventArgs e) 16 { 17 if (lvWordCount.SelectedItems[0] != null) 18 { 19 // 读取数据库，读出该歌手的所有歌曲 20 DBHelper dbHelper = new DBHelper(); 21 StringBuilder sb = new StringBuilder(); 22 sb.Append("select song_id,song_name, singer_name,song_url from song_info inner join singer_info on song_info.singer_id=singer_info.singer_id "); 23 sb.AppendFormat("where song_word_count={0}", Convert.ToInt32(lvWordCount.SelectedItems[0].Tag)); 24 Console.WriteLine(sb.ToString()); 25 FrmSongList songList = new FrmSongList(); 26 songList.Sql = sb.ToString(); 27 songList.Previous = PrevioisForm.WordCount; 28 songList.Show(); 29 this.Close(); 30 } 31 } 已点歌曲：
1 //刷新歌曲列表 2 3 private void timer1_Tick(object sender, EventArgs e){ 4 5 this.newSonglist(); 6 7 } 8 9 private void newSonglist()10 11 {12 13 // 清空原列表14 15 lvlist.Items.Clear(); 16 17 int index = 0; 18 19 while (PlayList.SongList[index] != null) 20 21 { 22 23 ListViewItem item = new ListViewItem(); 24 25 //获取歌曲的名称 26 27 item.Text = PlayList.SongList[index].SongName; 28 29 item.Tag = index; 30 31 //歌曲的播放状态 32 33 string playState = PlayList.SongList[index].PlayState == SongPlayState.unplayed ? "未播放" : "已播放"; 34 35 item.SubItems.Add(playState); 36 37 lvlist.Items.Add(item); 38 39 index++; 40 41 } 42 43 } 44 45 //切割 46 47 private void tsbtnCut_Click_1(object sender, EventArgs e) 48 49 { 50 51 int songId = -1; // 切歌的编号 52 53 DialogResult re = MessageBox.Show("确定要切歌吗?", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); 54 55 if (re == DialogResult.OK) 57 { 58 59 if (this.lvlist.SelectedItems.Count > 0) 60 61 { 62 63 songId = Convert.ToInt32(this.lvlist.SelectedItems[0].Tag); 64 65 } 66 67 PlayList.CutSong(songId); 68 69 this.newSonglist(); 70 71 } 72 73 歌曲列表：
1 // 窗体加载时查询歌曲列表 2 private void SongListForm_Load(object sender, EventArgs e) 3 { 4 DBHelper dbHelper = new DBHelper(); 5 DataSet dataSet = new DataSet(); 6 SqlDataAdapter adapter = new SqlDataAdapter(this.Sql,dbHelper.Connection); 7 adapter.Fill(dataSet, "songList"); 8 dgvSong.DataSource = dataSet.Tables["songList"]; 9 } 10 11 // 点播一首歌曲 12 private void dgvSong_CellClick(object sender, DataGridViewCellEventArgs e) 13 { 14 // 创建一个歌曲对象，并将当权选中的歌曲名和路径赋给该对象 15 Song song = new Song(); 16 song.SongName = dgvSong.SelectedRows[0].Cells["songName"].Value.ToString(); 17 song.SongURL = dgvSong.SelectedRows[0].Cells["songURL"].Value.ToString(); 18 PlayList.AddSong(song); 19 20 // 更新数据库，将选中的歌曲点播次数加1 21 int songId = Convert.ToInt32(dgvSong.SelectedRows[0].Cells["songId"].Value); 22 string sql = string.Format("update song_info set song_play_count=song_play_count+1 where song_id={0}", songId); 23 DBHelper dbHelper = new DBHelper(); 24 try 25 { 26 SqlCommand command = new SqlCommand(sql, dbHelper.Connection); 27 dbHelper.OpenConnection(); 28 command.ExecuteNonQuery(); 29 } 30 catch (Exception ex) 31 { 32 Console.WriteLine(ex.Message); 33 MessageBox.Show("错误！"); 34 } 35 finally 36 { 37 dbHelper.CloseConnection(); 38 } 39 } 后台管理
KTVUtil 类：
1 public class KTVUtil 2 3 { 4 5 //保存歌曲的目录 6 7 public static string songURL = ""; 8 9 //保存歌手图片的目录10 11 public static string singer_photoURL = "";12 13 } 主窗体的Load事件：
1 private void frmKTV_Load(object sender, EventArgs e) 2 3 { 4 5 6 7 // 歌曲路径 8 9 string sql = "select resource_path from Resource_path where resource_id=2";10 11 KTVUtil.songURL = song_path(sql);12 13 // 歌手图片路径14 15 string sql1 = "select resource_path from Resource_path where resource_id=1";16 17 KTVUtil.singer_photoURL = song_path(sql1); 18 19 } 20 21 //路径 22 23 private string song_path(string sql) 24 25 { 26 27 SqlConnection con = new SqlConnection(DBHelp.str); 28 29 SqlCommand cmd = new SqlCommand(sql, con); 30 31 string path = ""; 32 33 34 35 con.Open(); 36 37 SqlDataReader dr = cmd.ExecuteReader(); 38 39 40 41 if (dr != null) 42 43 { 44 45 if (dr.HasRows) 46 47 { 48 49 while (dr.Read()) 50 51 { 52 53 path = dr["resource_path"].ToString(); 增加修改歌手信息：
1 获取图片的代码： 2 3 //相对路径 4 5 public string FileName; 6 7 //绝对路径 8 9 public string Path;10 11 //获取12 13 private void btnLiu_Click(object sender, EventArgs e)14 15 {16 17 DialogResult result = open.ShowDialog(); 18 19 20 21 if (result == DialogResult.OK)//获取路径 22 23 { 24 25 //相对路径 26 27 FileName = open.SafeFileName; 28 29 //绝对路径 30 31 Path = open.FileName; 32 33 pic.Image = Image.FromFile(Path); 39 } 40 41 } 42 43 //复制图片的路径 44 45 if (Path != null) 46 47 { 48 49 if (Path != KTVUtil.singer_photoURL + FileName) 50 51 { 52 53 File.Copy(Path, KTVUtil.singer_photoURL + FileName, true); 54 55 } 56 57 } 58 59 60 61 private void 修改ToolStripMenuItem_Click(object sender, EventArgs e) 62 63 { 64 65 if (dgvlist.SelectedRows[0].Cells[0].Value.ToString() != "") 66 67 { 68 69 //获取选中行的歌曲编号 70 71 int songid = Convert.ToInt32(dgvlist.SelectedRows[0].Cells["song_id"].Value); 72 73 FrmAddSong frm = new FrmAddSong(); 74 75 frm.songid = songid; 76 77 frm.Show(); 78 79 } 80 81 else 82 83 { 84 85 MessageBox.Show("选歌曲"); 86 87 } 查询，删除，歌手信息
1 public void deletesonginfo() 2 { 3 //获取选中行的歌手编号 4 singer_id = Convert.ToInt32(dgvlist.SelectedRows[0].Cells["siigid"].Value); 5 string sql = "delete song_info where singer_id=" + singer_id + ""; 6 7 SqlCommand cmd = new SqlCommand(sql, con); 8 con.Open(); 9 cmd.ExecuteNonQuery(); 10 con.Close(); 11 12 } 13 //删除歌手 14 public void deletesingerinfo() 15 { 16 //获取选中行的歌手编号 17 singer_id = Convert.ToInt32(dgvlist.SelectedRows[0].Cells["siigid"].Value); 18 string sql1 = "select song_id from song_info where singer_id=" + singer_id + ""; 19 SqlConnection con1 = new SqlConnection(DBHelp.str); 20 SqlCommand cmd1 = new SqlCommand(sql1, con1); 21 con1.Open(); 22 int song_id = Convert.ToInt32(cmd1.ExecuteScalar()); 23 con1.Close(); 24 if (song_id != 0) 25 { 26 MessageBox.Show("删除该歌手的歌曲信息"); 27 28 } 29 else 30 { 31 string sql = "delete dbo.singer_info where singer_id=" + singer_id + " "; 32 33 SqlCommand cmd = new SqlCommand(sql, con); 34 con.Open(); 35 int count = cmd.ExecuteNonQuery(); 36 if (count > 0) 37 { 38 MessageBox.Show("成功!"); 39 string RowFilter = ""; 40 SelectInfo(RowFilter); 41 } 42 else 43 { 44 MessageBox.Show("失败!"); 45 } 46 47 con.Close(); 48 49 } 50 51 } 52 //给dgvlist控件绑定数据的方法 53 public void SelectInfo(string RowFilter) 54 { 55 dgvlist.AutoGenerateColumns = false; 56 //歌手姓名,歌手类型,歌手性别,歌手描述 57 58 string sql = "select singer_info.singertype_id,singer_name,singer_id,singertype_name,singer_gender,singer_description from dbo.singer_info,dbo.singer_type where singer_info.singertype_id=singer_type.singertype_id "; 59 SqlDataAdapter da = new SqlDataAdapter(sql, con); 60 DataSet ds = new DataSet(); 61 try 62 { 63 da.Fill(ds, "info"); 64 DataView dv = new DataView(ds.Tables["info"]); 65 dv.RowFilter = RowFilter; 66 dgvlist.DataSource = dv; 67 } 68 catch (Exception) 69 { 70 71 MessageBox.Show("网络异常!"); 72 } 73 finally 74 { 75 con.Close(); 76 } 77 } 78 private void btnselect_Click(object sender, EventArgs e) 79 { 80 81 if (txtname.Text == "" && cboty.Text == "全部") 82 { 83 string RowFilter = ""; 84 SelectInfo(RowFilter); 85 } 86 else if (txtname.Text != "") 87 { 88 //获取要查询歌手的姓名 89 name = txtname.Text; 90 //获取要查询的歌手类型 91 int type = Convert.ToInt32(cboty.SelectedValue); 92 string RowFilter = "singer_name like '%" + name + "%'"; 93 SelectInfo(RowFilter); 94 95 } 96 else 97 { 98 99 //获取要查询歌手的姓名 100 name = txtname.Text; 101 //获取要查询的歌手类型 102 int type = Convert.ToInt32(cboty.SelectedValue); 103 string RowFilter = "singer_name like '%" + name + "%' and singertype_id=" + type + ""; 104 SelectInfo(RowFilter); 105 } 106 107 } 108 //给歌手类型下拉框绑定数据的方法 109 public void LoadINGO() 110 { 111 112 string sql = "select * from dbo.singer_type"; 113 SqlDataAdapter da = new SqlDataAdapter(sql, con); 114 DataSet ds = new DataSet(); 115 try 116 { 117 da.Fill(ds, "info"); 118 cboty.DataSource = ds.Tables["info"]; 119 cboty.DisplayMember = "singertype_name"; 120 cboty.ValueMember = "singertype_id"; 121 DataRow row = ds.Tables["info"].NewRow(); 122 row["singertype_id"] = -1; 123 row["singertype_name"] = "全部"; 124 ds.Tables["info"].Rows.InsertAt(row, 0); 125 cboty.SelectedIndex = 0; 126 127 128 } 129 catch (Exception) 130 { 131 132 MessageBox.Show("网路异常!"); 133 } 134 finally 135 { 136 con.Close(); 137 } 138 } 139 private void FrmSelectSinger_Load(object sender, EventArgs e) 140 { 141 142 // 给歌手类型下拉框绑定数据的方法 143 LoadINGO(); 144 //给dgvlist控件绑定数据 145 string RowFilter = ""; 146 SelectInfo(RowFilter); 147 } 148 149 private void 删除ToolStripMenuItem_Click_1(object sender, EventArgs e) 150 { 151 if (dgvlist.SelectedRows[0].Cells[0].Value.ToString() != "") 152 { 153 DialogResult result = MessageBox.Show("确定删除?", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Question); 154 if (result == DialogResult.OK) 155 { 156 //删除歌手信息的方法 157 deletesonginfo(); 158 deletesingerinfo(); 159 string RowFilter = ""; 160 SelectInfo(RowFilter); 增加歌曲和修改歌曲：
1 public int songid; 2 3 public string Path; 4 5 //相对路径 6 7 public string txtxdpath; 8 9 //新增歌曲信息的方法10 11 public void addinfo()12 13 {14 15 //获取歌曲名称16 17 string song_name = txtname.Text; 18 19 //获取拼音缩写信息 20 21 string py = txtsuo.Text; 22 23 //获取歌曲类型对应的隐藏值 24 25 int type_id = Convert.ToInt32(cboty.SelectedValue); 26 27 //获取歌手姓名对应的编号 28 29 int singe_id = Convert.ToInt32(txtsername.Tag); 30 31 //获取歌曲文件名 32 33 string url = txtsongurl.Text; 34 35 //获取歌曲名称的长度 36 37 int length = song_name.Length; 38 39 //拼接sql语句 40 41 string sql = "insert into song_info values('" + song_name + "','" + py + "'," + length + "," + type_id + "," + singe_id + ",'" + url + "',default)"; 42 43 SqlCommand cmd = new SqlCommand(sql, con); 44 45 con.Open(); 46 47 int result = cmd.ExecuteNonQuery(); 48 49 if (result > 0) 50 51 { 52 53 MessageBox.Show("保存成功!"); 54 55 if (Path != null) 56 57 { 58 59 if (Path != KTVUtil.songURL + txtxdpath) 60 61 { 62 63 File.Copy(Path, KTVUtil.songURL + txtxdpath, true); 64 65 } 66 } 67 68 } 69 70 else 71 72 { 查询，删除歌曲信息
1 //删除歌曲信息的方法 2 public void deletesong() 3 { 4 5 if (dgvlist.SelectedRows[0].Cells[0].Value.ToString() != "") 6 { 7 //获取选中行的歌曲编号 8 int song_id = Convert.ToInt32(dgvlist.SelectedRows[0].Cells["song_id"].Value); 9 DialogResult result = MessageBox.Show("删除?", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Question); 10 if (result == DialogResult.OK) 11 { 12 SqlConnection con = new SqlConnection(DBHelp.str); 13 string sql = "delete song_info where song_id=" + song_id + ""; 14 SqlCommand cmd = new SqlCommand(sql, con); 15 16 con.Open(); 17 int count = cmd.ExecuteNonQuery(); 18 if (count > 0) 19 { 20 MessageBox.Show("成功!"); 21 string RowFilter=""; 22 LoadAllINFO(RowFilter); 23 } 24 else 25 { 26 MessageBox.Show("失败!"); 27 } 28 29 con.Close(); 30 31 } 32 33 } 34 else 35 { 36 37 MessageBox.Show("选歌曲"); 38 39 } 40 } 41 //给歌曲类型下拉框赋值的方法 42 public void LoadINFO() 43 { 44 45 SqlConnection con = new SqlConnection(DBHelp.str); 46 string sql = "select * from song_type"; 47 SqlDataAdapter da = new SqlDataAdapter(sql, con); 48 DataSet ds = new DataSet(); 49 50 da.Fill(ds, "info"); 51 cbolist.DataSource = ds.Tables["info"]; 52 cbolist.DisplayMember = "songtype_name"; 53 cbolist.ValueMember = "songtype_id"; 54 55 DataRow row = ds.Tables["info"].NewRow(); 56 row["songtype_id"] = -1; 57 row["songtype_name"] = "全部"; 58 ds.Tables["info"].Rows.InsertAt(row, 0); 59 cbolist.SelectedIndex = 0; 60 61 62 63 64 con.Close(); 65 66 67 } 68 69 //给dgvlist绑定数据的方法 70 public void LoadAllINFO(string RowFilter) 71 { 72 //取消英文列自动生成 73 dgvlist.AutoGenerateColumns = false; 74 SqlConnection con = new SqlConnection(DBHelp.str); 75 string sql = "select song_id,song_name,songtype_name,song_play_count,song_info.songtype_id from song_info,song_type where song_info.songtype_id=song_type.songtype_id"; 76 SqlDataAdapter da = new SqlDataAdapter(sql, con); 77 DataSet ds = new DataSet(); 78 79 da.Fill(ds, "info"); 80 DataView dv = new DataView(ds.Tables["info"]); 81 dv.RowFilter = RowFilter; 82 dgvlist.DataSource = dv; 83 84 con.Open(); 85 86 87 } 88 private void btnselect_Click(object sender, EventArgs e) 89 { 90 91 92 if (txtname.Text == "" && cbolist.Text == "全部") 93 { 94 string RowFilter = ""; 95 LoadAllINFO(RowFilter); 96 } 97 else if (txtname.Text != "") 98 { 99 //获取歌曲名称 100 string song_name = txtname.Text; 101 //获取歌曲类型对应的隐藏值 102 int type_id = Convert.ToInt32(cbolist.SelectedValue); 103 string RowFilter = "song_name like '%" + song_name + "%'"; 104 LoadAllINFO(RowFilter); 105 106 } 107 else 108 { 109 110 //获取歌曲名称 111 string song_name = txtname.Text; 112 //获取歌曲类型对应的隐藏值 113 int type_id = Convert.ToInt32(cbolist.SelectedValue); 114 string RowFilter = "song_name like '%" + song_name + "%' and songtype_id =" + type_id + ""; 115 LoadAllINFO(RowFilter); 116 117 } 118 } 119 120 private void 修改ToolStripMenuItem_Click(object sender, EventArgs e) 121 { 122 if (dgvlist.SelectedRows[0].Cells[0].Value.ToString() != "") 123 { 124 //获取选中行的歌曲编号 125 int songid = Convert.ToInt32(dgvlist.SelectedRows[0].Cells["song_id"].Value); 126 FrmAddSong frm = new FrmAddSong(); 127 frm.songid = songid; 128 frm.Show(); 129 } 130 else 131 { 132 MessageBox.Show("选歌曲"); 133 } 134 } 135 136 private void 删除ToolStripMenuItem_Click(object sender, EventArgs e) 137 { 138 139 //删除歌曲信息的方法 140 deletesong(); 141 } 142 143 private void frmselectSong_Load(object sender, EventArgs e) 144 { 145 //给歌曲类型下拉框赋值 146 LoadINFO(); 147 //给dgvlist绑定数据 148 string RowFilter = ""; 149 LoadAllINFO(RowFilter); 150 } 歌曲路径：
1 private void frmAddSongURL_Load(object sender, EventArgs e) 2 3 { 4 5 string sql = "select resource_path from Resource_path where resource_id=2"; 6 7 txtoldurl.Text = song_path(sql); 8 9 }10 11 //给当前路径赋值12 13 private string song_path(string sql) 14 15 { 16 17 18 19 SqlCommand cmd = new SqlCommand(sql, con); 20 21 string path = ""; 22 23 try 24 25 { 26 27 con.Open(); 28 29 SqlDataReader dr = cmd.ExecuteReader(); 30 31 32 33 if (dr != null) 34 35 { 36 37 if (dr.HasRows) 38 39 { 40 41 while (dr.Read()) 42 43 { 44 45 path = dr["resource_path"].ToString(); 46 47 } 48 49 50 51 DialogResult re = MessageBox.Show("修改路径?", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question); 52 53 if (re == DialogResult.Yes) 54 55 { 56 57 58 59 Directory.Delete(txtnewurl.Text); 60 61 Directory.Move(txtoldurl.Text, txtnewurl.Text); 62 63 string newUrl = txtnewurl.Text; 64 65 SqlConnection con = new SqlConnection(DBHelp.str); 66 67 string sql = "update Resource_path set resource_path='" + newUrl + "' where resource_type='song'"; 68 69 SqlCommand cmd = new SqlCommand(sql, con); 70 71 try 72 73 { 74 75 con.Open(); 76 77 int count = cmd.ExecuteNonQuery(); 78 79 if (count > 0) 80 81 //浏览新路径 82 83 private void btnLiu_Click(object sender, EventArgs e) 84 85 { 86 87 88 89 DialogResult result = brow.ShowDialog(); 90 91 if (result == DialogResult.OK) 92 93 { 94 95 txtnewurl.Text = brow.SelectedPath + "\\"; 96 97 } 1 //歌曲的文件名： 2 3 //浏览 4 5 private void btnLiu_Click(object sender, EventArgs e) 6 7 { 8 9 open.Filter = "歌曲文件|*.mp3;";10 11 DialogResult result = open.ShowDialog();12 13 if (result == DialogResult.OK)//获取路径14 15 {16 17 //相对路径18 19 txtxdpath = open.SafeFileName; 20 21 txtsongurl.Text = txtxdpath; 22 23 //绝对路径 24 25 Path = open.FileName; 26 27 28 29 int dot = txtxdpath.LastIndexOf('.'); 30 31 string fileType = txtxdpath.Substring(dot + 1); 32 33 if (fileType != "mp3") 34 35 { 36 37 MessageBox.Show("文件类型不对！");
歌手图片的路径：
1 //给当前路径赋值 2 3 private string song_path(string sql) 4 5 { 6 7 SqlConnection con = new SqlConnection(DBHelp.str); 8 9 SqlCommand cmd = new SqlCommand(sql, con);10 11 string path = "";12 13 14 15 con.Open(); 16 17 SqlDataReader dr = cmd.ExecuteReader(); 18 19 20 21 if (dr != null) 22 23 { 24 25 if (dr.HasRows) 26 27 { 28 29 while (dr.Read()) 30 31 { 32 33 path = dr["resource_path"].ToString(); 34 35 } 36 37 private void btnSa_Click(object sender, EventArgs e) 38 39 { 40 41 // 如果新路径为空，提示 42 43 if (this.txtnewurl.Text.Trim() == "") 44 45 { 46 47 MessageBox.Show("请选择新路径！"); 48 49 } 50 51 else 52 53 { 54 55 // 用户确认修改 56 57 if (MessageBox.Show("确定要修改路径吗?", "操作提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes) 58 59 { 60 61 62 63 Directory.Delete(txtnewurl.Text); 64 65 Directory.Move(txtoldurl.Text, txtnewurl.Text); 66 67 string newUrl = txtnewurl.Text; 68 69 SqlConnection con = new SqlConnection(DBHelp.str); 70 71 string sql = "update Resource_path set resource_path='" + newUrl + "' where resource_type='singer_photo'"; 72 73 SqlCommand cmd = new SqlCommand(sql, con); 74 75 con.Open(); 76 77 int count = cmd.ExecuteNonQuery(); 78 79 if (count > 0) 80 81 { 82 83 //浏览 84 85 private void btnLiu_Click(object sender, EventArgs e) 86 87 { 88 89 DialogResult result = brow.ShowDialog(); 90 91 if (result == DialogResult.OK) 92 93 { 94 95 txtnewurl.Text = brow.SelectedPath + "\\"; 96 97 } 汉字转拼音首字母
1 public static string GetChineseSpell(string strText) 2 { 3 if (strText == null || strText.Length == 0) 4 return strText; 5 System.Text.StringBuilder myStr = new System.Text.StringBuilder(); 6 foreach (char vChar in strText) 7 { 8 // 若是字母则直接输出 9 if ((vChar >= 'a' && vChar <= 'z') || (vChar >= 'A' && vChar <= 'Z')) 10 myStr.Append(char.ToUpper(vChar)); 11 else if ((int)vChar >= 19968 && (int)vChar <= 40869) 12 { 13 // 若字符Unicode编码在编码范围则 查汉字列表进行转换输出 14 foreach (string strList in strChineseCharList) 15 { 16 if (strList.IndexOf(vChar) > 0) 17 { 18 myStr.Append(strList[0]); 19 break; 20 } 21 } 22 } 23 } 24 return myStr.ToString(); 25 }// GetChineseSpell 26 27 这可是我辛辛苦苦的成果哦，虽然这不算什么，但我还希望大家看看就能收获一些知识，就开心了。