泛型应用(1)

一直以来对泛型的 理解一直很 浮浅,需要多 学习理解


Customer.cs 代码:

 public class Customer
    {
        private string customerName = "";
        public string CustomerName
        {
            get { return customerName; }
            set { customerName = value; }
        }
        public Customer(string customerName)
        {
            this.customerName = customerName;
        }
    }

是对员工的定义


CustomerList.cs代码

 public class CustomerList : CollectionBase
    {
        public CustomerList()
        {
        }
        public Customer this[int index]
        {
            get
            {
                return (Customer)List[index];
            }
            set
            {
                List[index] = value;
            }
        }
        public int Add(Customer value)
        {
            return List.Add(value);
        }
    }

调用:

 IList<Customer> customers = new List<Customer>();

            //List <Customer> customers=new List<Customer>() ;

            
            customers.Add(new Customer("jhtchina_suzsoft"));
            customers.Add(new Customer("test1_microsoft"));
            string str_temp = string.Empty;
            foreach (Customer c in customers)
            {
                str_temp +="|||||"+ c.CustomerName;
            }
            MessageBox.Show(str_temp);

或者

  public class List<T> : CollectionBase
    {
        public List()
        {
        }
        public T this[int index]
        {
            get
            {
                return (T)List[index];
            }
            set
            {
                List[index] = value;
            }
        }
        public int Add(T value)
        {
            return List.Add(value);
        }
    }

调用:

   List <Customer> customers=new List<Customer>() ;

            
            customers.Add(new Customer("jhtchina_suzsoft"));
            customers.Add(new Customer("test1_microsoft"));
            string str_temp = string.Empty;
            foreach (Customer c in customers)
            {
                str_temp +="|||||"+ c.CustomerName;
            }
            MessageBox.Show(str_temp);

这个只是很初级的
需要继续学习
关于HashTable的一些应用

  Hashtable _simpleTable1= new Hashtable();
            Customer cust=new Customer("jhtchina");
            cust.CustomerName ="jhtchina_CustomerName";
            _simpleTable1.Add("jhtchina_Key",cust);





            Customer ht = (Customer)_simpleTable1["jhtchina_Key"];

            //MessageBox.Show(ht.CustomerName);


            



            //convert HashTable  to Dictionary
            Dictionary<string, Customer> tmpDic = new Dictionary<string, Customer>();
            string aKey = "jhtchina_Key";
            tmpDic[aKey] = (Customer)_simpleTable1[aKey];
            MessageBox.Show(tmpDic[aKey].CustomerName);




            //HashTable
            Hashtable _simpleTable = new Hashtable();

            _simpleTable.Add("Key1", "Value1");
            _simpleTable.Add("Key2", "Value2");

           



            int i_count = _simpleTable.Count;

            IDictionaryEnumerator _enumerator = _simpleTable.GetEnumerator();

            string _string="";
            while (_enumerator.MoveNext())
            {
                _string += _enumerator.Key + "   ";
                _string += _enumerator.Value + "\n";
            }

            MessageBox.Show(_string);

            //if (_simpleTable.ContainsKey("Key1"))
            //{
            //    Console.WriteLine("Key1 is present");                 
            //}

            //if (_simpleTable.ContainsValue("Value1"))
            //{

            //    Console.WriteLine("Value1 is present");

            //}





            _simpleTable.Clear();