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   源码介绍

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附加数据库后修改 app.config中的连接串密码即可用，数据库在DB目录下，是 sql server 2012 , ide建议用vs2017

实现了添加歌手/歌曲，点播功能，具体如下图：

后台管理界面相关：

需要启用 Windows Media Player 功能，否则会提示【System.Runtime.InteropServices.COMException:“没有注册类】

操作步骤：控制面板>>程序>>启用或者关闭windows 功能>>选中 媒体功能>>Windows Media Player,点击确定即可

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace KTV
{
    public partial class FrmBoFang : Form
    {
        public FrmBoFang()
        {
            InitializeComponent();
        }

        private bool tag = false;
        public static DataSet ds = new DataSet();
        private void FrmBoFang_Load(object sender, EventArgs e)
        {
            listBox1.DisplayMember = "歌曲名称";
            listBox1.ValueMember = "存放位置";
            ds.Tables.Add();
            ds.Tables[0].Columns.Add("存放位置");
            ds.Tables[0].Columns.Add("歌曲名称");
            listBox1.DataSource = ds.Tables[0];   
            
        }

        public int i = 0;
        private int YouXianID = -1;
        private void button9_Click(object sender, EventArgs e)
        {
            tag = false;
            if (listBox1.Items.Count < 1)
            {
                MessageBox.Show("请选择您要播放的歌曲！", "温馨提示", MessageBoxButtons.OK,
                     MessageBoxIcon.Asterisk);
                return;
            }
            if (listBox1.SelectedValue.ToString() != "")
            {
                axWindowsMediaPlayer1.URL = listBox1.SelectedValue.ToString();
                i = listBox1.SelectedIndex;
                
            }
            else
            {
                MessageBox.Show("请选择您要播放的歌曲！", "温馨提示", MessageBoxButtons.OK,
                     MessageBoxIcon.Asterisk);
            }
        }

        private void btnBoFang_Click(object sender, EventArgs e)
        {
            if (listBox1.Items.Count < 1)
            {
                MessageBox.Show("请选择您要播放的歌曲！", "温馨提示", MessageBoxButtons.OK,
                     MessageBoxIcon.Asterisk);
                return;
            }
            axWindowsMediaPlayer1.Ctlcontrols.play();
            tag = false;
        }

        private void btnZanTing_Click(object sender, EventArgs e)
        {
            axWindowsMediaPlayer1.Ctlcontrols.pause();
        }

        private void btnTingZhi_Click(object sender, EventArgs e)
        {
            axWindowsMediaPlayer1.Ctlcontrols.stop();
            tag = true;
        }

        private void btnUp_Click(object sender, EventArgs e)
        {
            if (listBox1.Items.Count < 1)
            {
                MessageBox.Show("请选择您要播放的歌曲！", "温馨提示", MessageBoxButtons.OK,
                    MessageBoxIcon.Asterisk);
                return;
            }
            axWindowsMediaPlayer1.Ctlcontrols.previous();
            listBox1.ClearSelected();
            if (i == 0)
            {
                i = listBox1.Items.Count - 1;
            }
            else
            {
                i=i-1;
            }
            listBox1.SetSelected(i, true);
            axWindowsMediaPlayer1.URL = ds.Tables[0].Rows[i]["存放位置"].ToString();
        }

        private void btnNext_Click(object sender, EventArgs e)
        {
            if (listBox1.Items.Count < 1)
            {
                MessageBox.Show("请选择您要播放的歌曲！", "温馨提示", MessageBoxButtons.OK,
                    MessageBoxIcon.Asterisk);
                return;
            }
            axWindowsMediaPlayer1.Ctlcontrols.next();
            listBox1.ClearSelected();
            if (i == listBox1.Items.Count - 1)
            {
                i = 0;
            }
            else
            {
                i = i   1;
            }
            listBox1.SetSelected(i, true);
            axWindowsMediaPlayer1.URL = ds.Tables[0].Rows[i]["存放位置"].ToString();
        }

        private void button8_Click(object sender, EventArgs e)
        {
            ds.Tables[0].Rows.RemoveAt(listBox1.SelectedIndex);
        }

        private void button10_Click(object sender, EventArgs e)
        {
            ds.Tables[0].Rows.InsertAt(ds.Tables[0].Rows[0],listBox1.SelectedIndex - 1);
            
            ds.Tables[0].Rows.RemoveAt(listBox1.SelectedIndex 1);
        }

        private void button7_Click(object sender, EventArgs e)
        {
            FrmXuanZe FrmXuanZe1 = new FrmXuanZe();
            FrmXuanZe1.Show();
        }

        private void FrmBoFang_Shown(object sender, EventArgs e)
        {
            FrmXuanZe FrmXuanZe1 = new FrmXuanZe();
            FrmXuanZe1.Show();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (axWindowsMediaPlayer1.playState == WMPLib.WMPPlayState.wmppsStopped && tag==false)
            {
                if (YouXianID == -1)
                {
                    listBox1.ClearSelected();
                    if (comboBox1.Text.Trim() == "顺序播放")
                    {
                        if (i <= listBox1.Items.Count - 1)
                        {
                            i = -1;
                        }
                        i = i   1;
                    }
                    else if (comboBox1.Text.Trim() == "倒叙播放")
                    {
                        if (i <=  0)
                        {
                            i = listBox1.Items.Count;
                        }
                        i = i - 1;
                    }
                    else if (comboBox1.Text.Trim() == "随机播放")
                    {
                        System.Random r = new Random();
                        i=r.Next(listBox1.Items.Count);
                    }

                    listBox1.SetSelected(i, true);

                    axWindowsMediaPlayer1.URL = ds.Tables[0].Rows[i]["存放位置"].ToString();
                }
                else
                {
                    axWindowsMediaPlayer1.URL = ds.Tables[0].Rows[YouXianID]["存放位置"].ToString();
                }
            }

        }

        private void btnQuanPing_Click(object sender, EventArgs e)
        {
            if (axWindowsMediaPlayer1.playState == WMPLib.WMPPlayState.wmppsPlaying)
            {
                axWindowsMediaPlayer1.fullScreen = true;
            }
            else
            {
                MessageBox.Show("请先播放，再点全屏！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
            }
        }

        private void btnYouXianBoFang_Click(object sender, EventArgs e)
        {
            YouXianID = listBox1.SelectedIndex;
        }

        private void pictureBox1_Click(object sender, EventArgs e)
        {
            MessageBox.Show("需要硬件设备支持！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (MessageBox.Show("这里退出将关闭KTV点歌系统，您真的要退出吗？", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.No)
            {
                return;
            }
            Application.Exit();
        }

        private void FrmBoFang_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (MessageBox.Show("这里退出将关闭KTV点歌系统，您真的要退出吗？", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.No)
            {
                return;
            }
            Application.Exit();
        }
    }
}