1 public void showTolist(int type)
2 {
3 listbox.Items.Clear();
4 listbox.Items.Add("姓名 年龄 手机号码");
5 if (type == 1)
6 {
7 foreach (var n in list)
8 {
9 listbox.Items.Add(n.print());
10 }
11 }else
12 if (type == 2)
13 {
14 var query1 = from t1 in list
15 where t1.getAge() >= 18
16 select new { name=t1.getName(),age=t1.getAge(),
17 telephone=t1.getTelephone()};
18 var query2 = from t2 in query1
19 where t2.age <= 20
20 select new {name=t2.name,age=t2.age,
21 telephone=t2.telephone};
22 foreach (var n in query2)
23 {
24 listbox.Items.Add(n.name+" "+n.age+" "+n.telephone );
25 }
26
27 }
28 else
29 {
30 var qu = from t in list
31 where t.getName().ElementAt(0).ToString() == "李"
32 select new {name=t.getName(),age=t.getAge(),
33 telephone=t.getTelephone()};
34 foreach (var n in qu)
35 {
36 listbox.Items.Add(n.name + " " + n.age + " " + n.telephone);
37 }
38
39 }
