1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 using System.Windows.Forms;
 7 
 8 namespace Lesson7.Entity
 9 {
10     /// <summary>
11     /// 萨克斯类
12     /// </summary>
13     public class Celanese:Instrument
14     {
15         /// <summary>
16         /// 演奏方法
17         /// </summary>
18         public override void Play()
19         {
20             MessageBox.Show("萨克斯在演奏");
21         }
22     }
23 }

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 
 7 namespace Lesson7.Entity
 8 {
 9     /// <summary>
10     /// 员工类
11     /// </summary>
12     public class Employee
13     {
14         //年龄
15         public int Age { get; set; }
16         //性别
17         public Gender Gender { get; set; }
18         //工号
19         public string ID { get; set; }
20         //姓名
21         public string Name { get; set; }
22         //无参构造函数
23         public Employee()
24         {
25 
26         }
27         //有参构造函数
28         public Employee( string id, string name)
29         {
30             this.ID = id;
31             this.Name = name;
32       
33         }
34     }
35 }

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 
 7 namespace Lesson7.Entity
 8 {
 9     /// <summary>
10     /// 乐器类
11     /// </summary>
12     public class Instrument
13     {
14         /// <summary>
15         /// 演奏方法
16         /// </summary>
17         public virtual void Play()
18         {
19             Console.WriteLine("演奏");
20         }
21     }
22 }

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 using System.Windows.Forms;
 7 
 8 namespace Lesson7.Entity
 9 {
10     /// <summary>
11     /// 钢琴类
12     /// </summary>
13     public class Piano:Instrument
14     {
15         public override void Play()
16         {
17             MessageBox.Show("钢琴在演奏");
18         }
19     }
20 }

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 
 7 namespace Lesson7.Entity
 8 {
 9     /// <summary>
10     /// 项目经理类
11     /// </summary>
12     public class PM : Employee
13     {
14         //项目经验
15         private int _YearOfExperience;
16         public int YearOfExperience
17         {
18             get { return _YearOfExperience; }
19             set { _YearOfExperience = value; }
20         }
21         public PM(string id, string name, int yearOfExperience)
22             : base(id, name)
23         {
24             this._YearOfExperience = yearOfExperience;
25         }
26 
27     }
28 }

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 using System.Windows.Forms;
 7 
 8 namespace Lesson7.Entity
 9 {
10     /// <summary>
11     /// 小提琴类
12     /// </summary>
13     public class Violin:Instrument
14     {
15         /// <summary>
16         /// 演奏方法
17         /// </summary>
18         public override void Play()
19         {
20             MessageBox.Show("小提琴在演奏");
21         }
22     }
23 }

 1 using Lesson7.Entity;
 2 using System;
 3 using System.Collections.Generic;
 4 using System.ComponentModel;
 5 using System.Data;
 6 using System.Drawing;
 7 using System.Linq;
 8 using System.Text;
 9 using System.Threading.Tasks;
10 using System.Windows.Forms;
11 
12 namespace Lesson7
13 {
14     public partial class EngineerForm : Form
15     {
16         public List<SE> ses = new List<SE>();
17         public EngineerForm()
18         {
19             InitializeComponent();
20         }
21         /// <summary>
22         /// 初始员工
23         /// </summary>
24         public void IniSE()
25         {
26             SE se = new SE("001", "王小毛", 100);
27             SE se1 = new SE("002", "周新宇", 300);
28             SE se2 = new SE("003", "盖茨", 300);
29             ses.Add(se);
30             ses.Add(se1);
31             ses.Add(se2);
32             dgvList.DataSource = ses.ToList();
33         }
34         /// <summary>
35         /// 窗体加载事件
36         /// </summary>
37         /// <param name="sender"></param>
38         /// <param name="e"></param>
39         private void EngineerForm_Load(object sender, EventArgs e)
40         {
41             dgvList.AutoGenerateColumns = false;
42             IniSE();
43         }
44         /// <summary>
45         /// 演奏按钮
46         /// </summary>
47         /// <param name="sender"></param>
48         /// <param name="e"></param>
49         private void tsmiIns_Click(object sender, EventArgs e)
50         {
51             if (dgvList.SelectedRows.Count > 0)
52             {
53                 foreach (var item in ses)
54                 {
55                     if (item.ID.Equals(dgvList.SelectedRows[0].Cells[0].Value.ToString()))
56                     {
57                         PlayForm play = new PlayForm();
58                         play.from = this;
59                         play.index = dgvList.CurrentRow.Index;
60                         play.Show();
61                     }
62                 }
63             }
64             else
65             {
66                 MessageBox.Show("请选择员工");
67             }
68         }
69         
70     }
71 }

 1 using Lesson7.Entity;
 2 using System;
 3 using System.Collections.Generic;
 4 using System.ComponentModel;
 5 using System.Data;
 6 using System.Drawing;
 7 using System.Linq;
 8 using System.Text;
 9 using System.Threading.Tasks;
10 using System.Windows.Forms;
11 
12 namespace Lesson7
13 {
14     public partial class PlayForm : Form
15     {
16         public PlayForm()
17         {
18             InitializeComponent();
19             
20         }
21         public EngineerForm from;
22         public int index;
23         /// <summary>
24         /// 窗体加载事件
25         /// </summary>
26         /// <param name="sender"></param>
27         /// <param name="e"></param>
28         private void PlayForm_Load(object sender, EventArgs e)
29         {
30             gbName.Text = from.ses[index].Name;
31         }
32         /// <summary>
33         /// 演奏单击按钮
34         /// </summary>
35         /// <param name="sender"></param>
36         /// <param name="e"></param>
37         private void btnPlay_Click(object sender, EventArgs e)
38         {
39             SE se = new SE();
40             Instrument ins = new Instrument();
41             if (rdbCelanese.Checked == true)
42             {
43                 ins = new Celanese();
44             }
45             else if (rdbPiano.Checked == true)
46             {
47                 ins = new Piano();
48             }
49             else
50             {
51                 ins = new Violin();
52             }
53             se.Play(ins);
54         }
55     }
56 }