标签：
第一步:创建数据库连接方法和打开方法和关闭方法!
1 public class DBHelper
2 {
3 private string str = "server=.;database=MyKtv;uid=sa";
4 private SqlConnection _conection;
5
6 public SqlConnection Conection
7 {
8 get
9 {
10 if (_conection==null)
11 {
12 _conection = new SqlConnection(str);
13 }
14 return _conection;
15 }
16 }
17 /// <summary>
18 /// 打开方法
19 /// </summary>
20 public void OpenConnection()
21 {
22 if (Conection.State == ConnectionState.Closed)
23 {
24 Conection.Open();
25 } if (Conection.State == ConnectionState.Broken)
26 {
27 Conection.Close();
28 Conection.Open();
29 }
30 }
31 /// <summary>
32 /// 关闭方法`
33 /// </summary>
34 public void CloseConnection()
35 {
36 if (Conection.State == ConnectionState.Open && Conection.State == ConnectionState.Broken)
37 {
38 Conection.Close();
39 }
40
41 }
第二步:歌曲首页
歌曲首页:用到了窗体之间的转换和读取路径表中的图片路径放到filepath上
1 public partial class FormMain : Form
2 {
3 DBHelper db = new DBHelper();
4 public FormMain()
5 {
6 InitializeComponent();
7 }
8 private void Form1_Load(object sender, EventArgs e)
9 {
10 //读取路径表中的图片路径放到filepath上
11 string sql = "select resource_path from resource_path where resource_id=1";
12 SqlCommand cmd = new SqlCommand(sql,db.Conection);
13 db.OpenConnection();
14 KtvUtil.FilePath = cmd.ExecuteScalar().ToString();
15 db.CloseConnection();
16 }
17
18 private void pictureBox1_Click(object sender, EventArgs e)
19 {
20 //打开明星点歌窗体
21 FrmSinger frmSinger = new FrmSinger();
22 frmSinger.Show();
23 }
24
25 private void toolStripButton4_Click(object sender, EventArgs e)
26 {
27 this.Close();
28 }
29
30 private void pictureBox4_Click(object sender, EventArgs e)
31 {
32 //打开拼音点歌窗体
33 FrmOrderBySongName fobsn = new FrmOrderBySongName();
34 fobsn.ShowDialog();
35 }
第三步:歌星点歌
歌星点歌:用到了3个ListView之间的跳转,
1 public partial class FrmSinger : Form
2 {
3 DBHelper db = new DBHelper();
4 public string SingerType = "组合";
5 public int SingerId = 0;
6
7 public FrmSinger()
8 {
9 InitializeComponent();
10 }
11
12 private void panel1_Paint(object sender, PaintEventArgs e)
13 {
14
15 }
16 /// <summary>
17 /// 点击歌手类型后加载相应的信息
18 /// </summary>
19 public void ShowSingerDiQu()
20 {
21 if (lvtype.SelectedItems[0]!=null)
22 {
23 lvtype.Visible = false;
24 lvSinger.Visible = true;
25 lvSinger.Location = lvtype.Location;
26
27
28 this.SingerType = Convert.ToString(lvtype.SelectedItems[0].Tag);
29 }
30 string sql = "select singertype_name,singertype_id from singer_type";
31 SqlCommand cmd = new SqlCommand(sql,db.Conection);
32 SqlDataReader sdr;
33 try
34 {
35 db.OpenConnection();
36 sdr = cmd.ExecuteReader();
37 lvtype.Items.Clear();
38 if (sdr.HasRows)
39 {
40 int result = 0;
41 while (sdr.Read())
42 {
43 ListViewItem lvitem = new ListViewItem();
44 string typename = Convert.ToString(sdr["singertype_name"]);
45 int typeid = Convert.ToInt32(sdr["singertype_id"]);
46 lvitem.Text = typename;
47 lvitem.Tag = typeid;
48 lvitem.ImageIndex = result;
49 lvSinger.Items.Add(lvitem);
50 result++;
51 }
52 sdr.Close();
53 }
54 }
55 catch (Exception ex)
56 {
57 MessageBox.Show("第二个系统报错" + ex.Message);
58 }
59 finally
60 {
61 db.CloseConnection();
62 }
63 }
64
65 private void listView2_SelectedIndexChanged(object sender, EventArgs e)
66 {
67
68 }
69
70 private void FrmOrderBySinger_Load(object sender, EventArgs e)
71 {
72 this.lvSinger.Visible = false;
73 this.lvContry.Visible=false;
74 }
75
76 private void listView1_Click(object sender, EventArgs e)
77 {
78 ShowSingerDiQu();
79 }
80 /// <summary>
81 /// 读取对应地区的歌手名称
82 /// </summary>
83 public void ShowSingerName()
84 {
85 if (lvSinger.SelectedItems[0]!=null)
86 {
87 lvSinger.Visible = false;
88 lvContry.Visible = true;
89 lvContry.Location = lvtype.Location;
90 SingerId = Convert.ToInt32(lvSinger.SelectedItems[0].Tag);
91 StringBuilder sb = new