C # connect the KTV system to the SQL database C # application form,

C # connect the KTV system to the SQL database C # application form,

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Wudaokou Peking University qingbird campus

KTV Project

INSTRUCTOR: Yuan Yuming

SQL database Relationship Diagram

 

Step 1:

 

 

1 private void DoubleClicklvContry () 2 {3 if (this. lvtype. SelectedItems [0]! = Null) 4 {5 this. lvContry. visible = true; 6 this. lvtype. visible = false; 7 type = this. lvtype. selectedItems [0]. tag. toString (); 8 this. lvContry. location = this. lvtype. location; 9 lvContry. dock = DockStyle. fill; 10} 11 string SQL = "select singertype_id, singertype_name, singertype_imageURL from singer_type"; 12 cmd = new SqlCommand (SQL, con. conntion); 13 try 14 {15 con. openConntion (); 16 SqlDataRea Der reader = cmd. ExecuteReader (); 17 if (this. lvContry. Items! = Null) 18 {19 lvSinger. items. clear (); 20} 21 if (reader. hasRows) 22 {23 int index = 0; 24 while (reader. read () 25 {26 ListViewItem item = new ListViewItem (); 27 item. text = reader [1]. toString (); 28 item. tag = reader [0]. toString (); 29 this. imageList2.Images. add (Image. fromFile (@ "E: \ KTV \ SingerTypeIamge \" + reader [2]. toString (); 30 item. imageIndex = index; 31 this. lvContry. items. add (item); 32 in Dex ++; 33} 34} 35 reader. close (); 36} 37 catch (Exception ex) 38 {39 MessageBox. show (ex. message); 40} 41 finally 42 {43 con. closeConntion (); 44} 45} 46 47 48 Part 2: 49 private void lvtype_DoubleClick_1 (object sender, EventArgs e) 50 {51 DoubleClicklvContry (); 52} 53 // <summary> 54 // Add data to lvSinger 55 // </summary> 56 private void DoubleClicklvSinger () 57 {58 if (this. lvContry. selected Items [0]! = Null) 59 {60 this. lvSinger. visible = true; 61 this. lvContry. visible = false; 62 this. lvSinger. location = this. lvContry. location; 63 this. lvSinger. dock = DockStyle. fill; 64 65 string SQL = string. format ("select singer_id, singer_name, singer_photo_url from singer_info where singer_sex = '{0}' and singertype_id = {1}", 66 type, Convert. toInt32 (this. lvContry. selectedItems [0]. tag); 67 cmd = new SqlCommand (sq L, con. conntion); 68 try 69 {70 con. openConntion (); 71 // imageList3.Images. clear (); 72 SqlDataReader reader = cmd. executeReader (); 73 if (this. lvSinger. items! = Null) 74 {75 lvSinger. items. clear (); 76} 77 if (reader. hasRows) 78 {79 int index = 0; 80 while (reader. read () 81 {82 ListViewItem item = new ListViewItem (); 83 item. text = reader [1]. toString (); 84 item. tag = reader [0]. toString (); 85 this. imageList3.Images. add (Image. fromFile (@ "E: \ KTV \ singerPhoto \" + reader [2]. toString (); 86 item. imageIndex = index; 87 this. lvSinger. items. add (item); 88 index ++; 89} 90} 91 reader. close (); 92} 93 catch (Exception ex) 94 {95 MessageBox. show (ex. message); 96} 97 finally {98 con. closeConntion (); 99} 100} 101} 102 103

 

104 Part 3: Find the songs of singers in the region

 1    private void lvContry_DoubleClick(object sender, EventArgs e) 2         { 3             DoubleClicklvSinger(); 4         }        private void DoubleClickSong()  5         { 6             if (this.lvSinger.SelectedItems[0]!=null) 7             { 8                  string sql = string.Format("select song_id,song_name,song_url,singer_name from song_info,singer_info"+ 9                 " where song_info.singer_id=singer_info.singer_id and singer_info.singer_id={0}",Convert.ToInt32(this.lvSinger.SelectedItems[0].Tag));10                  FrmSong fs = new FrmSong();11                  fs.sql = sql;12 13                  fs.Show();14                  this.Hide();15             }

 

 

Part 4: select the artist information database to connect to the workshop

1   private void FrmSong_Load(object sender, EventArgs e)2         {3            4             adapter = new SqlDataAdapter(sql, db.Conntion);5             adapter.Fill(ds, "song_info");6       7             this.dataGridView1.DataSource = ds.Tables["song_info"];8             this.dataGridView1.AutoGenerateColumns = false;

 

 

Upload a miserable list by clicking a song

 

 

Public string Name {get; set;} public string age {get; set;} private void BOFANG_Load (object sender, EventArgs e) {this. listView1.Items. clear (); foreach (Song item in ListSong. list) {ListViewItem lvitem = new ListViewItem (item. songName); lvitem. subItems. add (item. songPath); string sate = item. sate = Sateze. unPaly? "Not played": "played"; lvitem. SubItems. Add (sate); this. listView1.Items. Add (lvitem );

Schematic diagram of playing music

 

 

Part 5: if the DATA form is uploaded to the private void dataGridView1_DoubleClick (object sender, EventArgs e) {if (this. dataGridView1.SelectedRows [0]! = Null) {BOFANG dd = new BOFANG (); Song song = new Song (); song. songName = this. dataGridView1.SelectedRows [0]. cells [3]. value. toString (); song. songPath = this. dataGridView1.SelectedRows [0]. cells [2]. value. toString (); dd. name = song. songName; ListSong. addSong (song); MessageBox. show ("added successfully. Please view it in the clicked song !!! "); Step 6: private void button#click (object sender, EventArgs e) {string en = textBox1.Text; SqlConnection con = new SqlConnection (SQL. str); string SQL = string. format ("select * from song_info where song_ AB like '" + en + "%'"); SqlDataAdapter da = new SqlDataAdapter (SQL, con); DataSet ds = new DataSet (); da. fill (ds, "song_info"); dataGridView1.DataSource = ds. tables ["song_info"]; SqlCommand cmd = ne W SqlCommand (SQL, con); try {con. open (); int count = cmd. executeNonQuery (); if (count> 0) {MessageBox. show ("search successful") ;}} catch (Exception) {MessageBox. show ("network exception Check network or SQL database !!! "); Con. Close ();

 

 

 

 

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