字典(Dictionary)泛型的练习

class DictionaryExample
    {
        public static void Main()
        {
            Dictionary<int, string> dicStudents = new Dictionary<int, string>();
            dicStudents.Add(1, "李刚");
            dicStudents.Add(2, "黄何军");
            dicStudents.Add(3, "方如波");
            dicStudents.Add(4, "陆前霖");
            dicStudents.Add(5, "蓝斌");
            for (int i = 1; i <= dicStudents.Count;i++ )
            {
                Console.WriteLine(dicStudents[i]);
            }
            //利用Linq语句排序
            var s=from item in dicStudents
                  where item.Key==4
                  orderby item.Value
                  select item;
            foreach (var t in s)
            {
                Console.WriteLine("key="+t.Key+"   value="+t.Value);
            }
            /*使用KeyValuePair进行输出*/
            foreach (KeyValuePair<int,string>t in s)
            {
                Console.WriteLine("key=" + t.Key + "  value=" + t.Value);
            }
            Console.Read();
        }

 

private Dictionary<string, int> students = new Dictionary<string, int>();
        public void AddStudent(string name, int ID)
        {

            students.Add(name, ID);
        }

        public int GetStudentIDByName(string name)
        {

            return students[name];
        }

        public void DelStudent(string name)
        {
            students.Remove(name);
        }

        void DisplayStudents()
        {

            foreach (KeyValuePair<string,int> s in students)
            {
                Console.WriteLine("key=" + s.Key + "  vale=" + s.Value);
            }
        }
        public static void Main()
        {

            DictionaryExample de = new DictionaryExample();
            de.AddStudent("甘全福", 26);
            de.AddStudent("李刚", 5);
            de.AddStudent("方如波", 7);
            Console.WriteLine("添加的学生后的学生信息如下:");
            de.DisplayStudents();

            de.DelStudent("甘全福");
            Console.WriteLine("删除后的学生信息如下:");
            de.DisplayStudents();

            Console.WriteLine("根据姓名返回学生的ID");
            Console.WriteLine("ID=" + de.GetStudentIDByName("李刚") + "by name");
            Console.Read();

        }

    }
}