泛型集合 List<T>

List<T>泛型集合特點：

• <T>表示泛型，T是Type簡寫，表示當前不確定具體類型；
• 可以根據用戶的實際需要，確定當前集合需要存放的數據類型，一旦確定不可改變；
• 使用泛型集合只能添加一種類型的數據，數據取出後無需強制轉換

 1 static void Main(string[] args) 
 2 {
 3             //創建幾個學員對象
 4             Student objStudent1 = new Student(1001, "小明");
 5             Student objStudent2 = new
 
 Student(1002, "小王");
 6             Student objStudent3 = new Student(1003, "小林");
 7             Student objStudent4 = new Student(1004, "小周");
 8             Student objStudent5 = new Student(1005, "小郭");
 9 
10             //創建集合對象
11             List<Student> objStuList = new List<Student>();

 
12             objStuList.Add(objStudent1);
13             objStuList.Add(objStudent2);
14             objStuList.Add(objStudent3);
15             objStuList.Add(objStudent4);
16             objStuList.Add(objStudent5);
17             //利用對象初始化器來添加對象
18             objStuList.Add(new Student()
19             {
 
20                 StudentId = 1009,
21                 StudentName = "linxinzhao"
22             });
23 
24             //Teacher objTeacher = new Teacher() { TeacherId=9001,TeacherName="andy 老師"};
25 
26             //獲取元素個數
27             Console.WriteLine("元素總數：{0}", objStuList.Count);
28             //刪除一個元素 remove
29             objStuList.Remove(objStudent4);
30             objStuList.RemoveAt(0);
31             //插入一個對象
32             objStuList.Insert(0, new Student(1006, "xiao"));
33             //遍歷集合
34             foreach (var item in objStuList)
35             {
36                 Console.WriteLine(item.StudentName + "\t" + item.StudentId);
37             }
38             //使用集合初始化器初始化泛型集合
39             List<Student> stuLsit = new List<Student>() { objStudent1, objStudent2, objStudent3, objStudent4 };
40             List<string> strNameList = new List<string>() { "list1", "list2", "list3" };
41             //使用for循環遍歷
42             for (int i = 0; i < strNameList.Count; i++)
43             {
44                 Console.WriteLine(strNameList[i]);
45             }
46             Console.ReadLine();
47         }

C#入門泛型集合List<T>