单列

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Runtime.Remoting.Services;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Day10_0200单例
{
    public partial class FrmPlay : Form
    {
        public static FrmPlay OnlyOneForm;
        //1.构造私有
        private FrmPlay()
        {
            InitializeComponent();
        }

        public string path;
        private void FrmPlay_Load(object sender, EventArgs e)
        {
          
        }

        public void PlaySong()
        {
            Player1.URL = path;
        }

        //静态方法
        public static FrmPlay GetInstance()
        {
            if (OnlyOneForm==null)
            {
                OnlyOneForm=new FrmPlay();
                return OnlyOneForm;
            }
            else
            {
                return OnlyOneForm;
            }
          
        }
    }
}

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

namespace Day10_0200单例
{
    public partial class FrmList : Form
    {
        public FrmList()
        {
            InitializeComponent();
        }

        private void FrmList_Load(object sender, EventArgs e)
        {
            //整行选中
            dgvList.SelectionMode= DataGridViewSelectionMode.FullRowSelect;

            //将dgv和ContextMenuStrip  bind
            dgvList.ContextMenuStrip = cms_list;
            List<Song> list=new List<Song>();
            Song s1 = new Song("001", "北京北京", "D:\song\所谓朋友.mp3");
            Song s2 = new Song("002", "北京北京", "D:\song\吴雨霏 - 生命树.mp3");
            Song s3 = new Song("003", "北京北京", "D:\song\战长沙 - 箫配乐 - 纯音乐版.mp3");

            list.Add(s1);
            list.Add(s2);
            list.Add(s3);

            dgvList.DataSource = list;
        }

        private void 播放ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            FrmPlay frm = FrmPlay.GetInstance();
            frm.path = dgvList.SelectedRows[0].Cells[2].Value.ToString();
            frm.Show();
            frm.PlaySong();
        }
    }
}