KTV后台的重要性
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<>之前就是说过“一个项目有很多重要的步骤以及功能”，那我们现在就来看看对于KTV项目来说；后台是处于什么样的重要作用！
首先就得了解KTV后台的一些功能了：
1.歌曲管理 、歌手管理 、设置资源路径
2.新增歌手、歌手查询、新增歌曲、歌曲查询、更改歌曲路径以及退出点歌系统
一.后台登录界面
01.判断登录
} //登陆 private void btnlogin_Click(object sender, EventArgs e) { SqlConnection con = new SqlConnection(DBHelp.str); string sql = "select count(1) from admin_info where admin_name=‘" + txtuser.Text + "‘ and admin_pwd=‘" + txtpwd.Text + "‘"; SqlCommand cmd = new SqlCommand(sql, con); try { con.Open(); int count = Convert.ToInt32(cmd.ExecuteScalar()); if (count > 0) { this.Hide(); FrmMain frm = new FrmMain(); frm.Show(); } } catch (Exception) { MessageBox.Show("失败"); } finally { con.Close();
}
}
二.主界面窗体
01.新增歌手
001.添加歌手
//添加 public void SongInfoAdd() { string name = txtname.Text;//歌手姓名 string type = "";//类别 if (ramale.Checked) { type = "男"; } else if (rafemale.Checked) { type = "女"; } else if (raguoup.Checked) { type = "组合"; } int id = Convert.ToInt32(cbotype.SelectedValue);//类型 string description = txtdescrp.Text;//描述 SqlConnection con = new SqlConnection(DBHelp.str); string sql = "insert into singer_info values(‘" + name + "‘," + id + ",‘" + type + "‘,‘" + fileName + "‘,‘" + description + "‘)"; SqlCommand cmd = new SqlCommand(sql,con); try { con.Open(); int count = cmd.ExecuteNonQuery(); if (count > 0) { File.Copy(fullName, Commod.DBsongurl + "\\" + fileName, true); MessageBox.Show("歌手添加成功"); } else { MessageBox.Show("歌手添加失败"); } } catch (Exception) { MessageBox.Show("歌手加载失败"); ; } finally { con.Close();//关闭 } }
002.添加图片
string fileName = ""; string fullName = ""; private void btnView_Click(object sender, EventArgs e) { //浏览 if (this.ofdlist.ShowDialog() == DialogResult.OK) { fileName = this.ofdlist.SafeFileName; // 文件名 fullName = this.ofdlist.FileName; picphoto.Image = Image.FromFile(fullName); txtdescrp.Text = fullName; } }
02.查询歌手
001.按歌手条件查询
private void btnselect_Click(object sender, EventArgs e) { //判定用歌手名或歌手类型查询 if (txtname.Text != ""&&cbotype.Text=="请选择") { //歌手名 string sql = @"select singer_name,singertype_name,singer_gender,singer_description from singer_type,singer_info where singer_type.singertype_id=singer_info.singertype_id and singer_name like ‘%" + txtname.Text + "%‘"; Selectsong(sql); } else if (txtname.Text=="") { //类型 string sql = @"select singer_name,singertype_name,singer_gender,singer_description from singer_type,singer_info where singer_type.singertype_id=singer_info.singertype_id and singertype_name like ‘%" + cbotype.Text + "%‘"; Selectsong(sql); } else { string sql = @"select singer_name,singertype_name,singer_gender,singer_description from singer_type,singer_info where singer_type.singertype_id=singer_info.singertype_id and singer_name like ‘%" + txtname.Text + "%‘ and singertype_name like ‘" + cbotype.Text +"‘"; Selectsong(sql); } }
002.给下拉框赋值
//下拉框 public void Singerselect() { string str = DBHelp.str; //连接数据库 SqlConnection con = new SqlConnection(str); string sql = "select singertype_id,singertype_name from singer_type"; //数据集和数据库连接 SqlDataAdapter da = new SqlDataAdapter(sql, con); DataSet ds = new DataSet(); try { da.Fill(ds); //绑定数据源 DataTable dt = ds.Tables[0]; DataRow dr = dt.NewRow(); //给该行赋值 dr[0] = -1; dr[1] = "请选择"; dt.Rows.InsertAt(dr, 0); cbotype.DataSource = ds.Tables[0]; //下拉框显示值 cbotype.DisplayMember = "singertype_name"; //下拉框隐藏值 cbotype.ValueMember = "singertype_id"; } catch (Exception) { MessageBox.Show("加载失败!"); } finally { con.Close(); } }
003.右键修改和删除并及时刷新
代码：
//修改 private void tsupdate_Click(object sender, EventArgs e) { string uname = dgvlist.SelectedRows[0].Cells[0].Value.ToString(); this.Hide(); frmAddSinger frm = new frmAddSinger(); frm.Text = "修改歌手信息"; frm.uname = uname; frm.Show(); } //删除 private void tsdelete_Click(object sender, EventArgs e) { string names = dgvlist.SelectedRows[0].Cells[0].Value.ToString(); string sql = "delete singer_info where singer_name=‘" + names + "‘"; Selectsong(sql); string sql1 = @"select singer_name,singertype_name,singer_gender,singer_description from singer_type,singer_info where singer_type.singertype_id=singer_info.singertype_id"; Selectsong(sql1); }
修改歌手
修改代码：
//修改 public void Update() { int songid = Convert.ToInt32(cbotype.SelectedValue); int num = txtname.Text.Length; SqlConnection con = new SqlConnection(DBHelp.str); //singer_id, singer_name, singertype_id, singer_gender, singer_photo_url, singer_description string sql = @"update singer_info set singer_name=‘" + txtname.Text + "‘,singer_gender=‘" + ch + "‘,singer_photo_url=‘" + fileName + "‘,singertype_id=" + type + ",singer_description=‘"+txtdescrp.Text+"‘ where singer_name =‘" + uname + "‘"; SqlCommand cmd = new SqlCommand(sql, con); try { con.Open(); int count = cmd.ExecuteNonQuery(); if (count > 0) { MessageBox.Show("修改成功"); } } catch (Exception) { MessageBox.Show("加载失败"); ; } finally { con.Close(); } }
修改与添加的关键判断代码：
private void btnadd_Click(object sender, EventArgs e) { if (this.Text=="修改歌手信息") { Update();//修改 } else { SongInfoAdd();//保存功能 } }
private void frmAddSinger_Load(object sender, EventArgs e) { Singerselect(); //默认查询代码 Commod.DBsongurl=OldLoadWays(); if (this.Text=="修改歌手信息") { btnadd.Text = "修改"; //MessageBox.Show(uname); Load_information(); } else { this.Text = "编辑歌手信息"; btnadd.Text = "保存"; } }
03.新增歌曲
001.查询代码
//查询 private void btnsearch_Click(object sender, EventArgs e) { //歌手 FrmSelectSinger frm = new FrmSelectSinger(); frm.Show(); this.Close(); } //歌手添加 string singer = dgvlist.SelectedRows[0].Cells[0].Value.ToString(); FrmAdd frm = new FrmAdd(); frm.name = singer; frm.Show(); this.Close();
002.自动形成缩写代码
public class Song_ab { private static int[] pyValue = new int[] { -20319,-20317,-20304,-20295,-20292,-20283,-20265,-20257,-20242,-20230,-20051,-20036, -20032,-20026,-20002,-19990,-19986,-19982,-19976,-19805,-19784,-19775,-19774,-19763, -19756,-19751,-19746,-19741,-19739,-19728,-19725,-19715,-19540,-19531,-19525,-19515, -19500,-19484,-19479,-19467,-19289,-19288,-19281,-19275,-19270,-19263,-19261,-19249, -19243,-19242,-19238,-19235,-19227,-19224,-19218,-19212,-19038,-19023,-19018,-19006, -19003,-18996,-18977,-18961,-18952,-18783,-18774,-18773,-18763,-18756,-18741,-18735, -18731,-18722,-18710,-18697,-18696,-18526,-18518,-18501,-18490,-18478,-18463,-18448, -18447,-18446,-18239,-18237,-18231,-18220,-18211,-18201,-18184,-18183, -18181,-18012, -17997,-17988,-17970,-17964,-17961,-17950,-17947,-17931,-17928,-17922,-17759,-17752, -17733,-17730,-17721,-17703,-17701,-17697,-17692,-17683,-17676,-17496,-17487,-17482, -17468,-17454,-17433,-17427,-17417,-17202,-17185,-16983,-16970,-16942,-16915,-16733, -16708,-16706,-16689,-16664,-16657,-16647,-16474,-16470,-16465,-16459,-16452,-16448, -16433,-16429,-16427,-16423,-16419,-16412,-16407,-16403,-16401,-16393,-16220,-16216, -16212,-16205,-16202,-16187,-16180,-16171,-16169,-16158,-16155,-15959,-15958,-15944, -15933,-15920,-15915,-15903,-15889,-15878,-15707,-15701,-15681,-15667,-15661,-15659, -15652,-15640,-15631,-15625,-15454,-15448,-15436,-15435,-15419,-15416,-15408,-15394, -15385,-15377,-15375,-15369,-15363,-15362,-15183,-15180,-15165,-15158,-15153,-15150, -15149,-15144,-15143,-15141,-15140,-15139,-15128,-15121,-15119,-15117,-15110,-15109, -14941,-14937,-14933,-14930,-14929,-14928,-14926,-14922,-14921,-14914,-14908,-14902, -14894,-14889,-14882,-14873,-14871,-14857,-14678,-14674,-14670,-14668,-14663,-14654, -14645,-14630,-14594,-14429,-14407,-14399,-14384,-14379,-14368,-14355,-14353,-14345, -14170,-14159,-14151,-14149,-14145,-14140,-14137,-14135,-14125,-14123,-14122,-14112, -14109,-14099,-14097,-14094,-14092,-14090,-14087,-14083,-13917,-13914,-13910,-13907, -13906,-13905,-13896,-13894,-13878,-13870,-13859,-13847,-13831,-13658,-13611,-13601, -13406,-13404,-13400,-13398,-13395,-13391,-13387,-13383,-13367,-13359,-13356,-13343, -13340,-13329,-13326,-13318,-13147,-13138,-13120,-13107,-13096,-13095,-13091,-13076, -13068,-13063,-13060,-12888,-12875,-12871,-12860,-12858,-12852,-12849,-12838,-12831, -12829,-12812,-12802,-12607,-12597,-12594,-12585,-12556,-12359,-12346,-12320,-12300, -12120,-12099,-12089,-12074,-12067,-12058,-12039,-11867,-11861,-11847,-11831,-11798, -11781,-11604,-11589,-11536,-11358,-11340,-11339,-11324,-11303,-11097,-11077,-11067, -11055,-11052,-11045,-11041,-11038,-11024,-11020,-11019,-11018,-11014,-10838,-10832, -10815,-10800,-10790,-10780,-10764,-10587,-10544,-10533,-10519,-10331,-10329,-10328, -10322,-10315,-10309,-10307,-10296,-10281,-10274,-10270,-10262,-10260,-10256,-10254 }; private static string[] pyName = new string[] { "A","Ai","An","Ang","Ao","Ba","Bai","Ban","Bang","Bao","Bei","Ben", "Beng","Bi","Bian","Biao","Bie","Bin","Bing","Bo","Bu","Ba","Cai","Can", "Cang","Cao","Ce","Ceng","Cha","Chai","Chan","Chang","Chao","Che","Chen","Cheng", "Chi","Chong","Chou","Chu","Chuai","Chuan","Chuang","Chui","Chun","Chuo","Ci","Cong", "Cou","Cu","Cuan","Cui","Cun","Cuo","Da","Dai","Dan","Dang","Dao","De", "Deng","Di","Dian","Diao","Die","Ding","Diu","Dong","Dou","Du","Duan","Dui", "Dun","Duo","E","En","Er","Fa","Fan","Fang","Fei","Fen","Feng","Fo", "Fou","Fu","Ga","Gai","Gan","Gang","Gao","Ge","Gei","Gen","Geng","Gong", "Gou","Gu","Gua","Guai","Guan","Guang","Gui","Gun","Guo","Ha","Hai","Han", "Hang","Hao","He","Hei","Hen","Heng","Hong","Hou","Hu","Hua","Huai","Huan", "Huang","Hui","Hun","Huo","Ji","Jia","Jian","Jiang","Jiao","Jie","Jin","Jing", "Jiong","Jiu","Ju","Juan","Jue","Jun","Ka","Kai","Kan","Kang","Kao","Ke",
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