C# Dictionary 终极使用方法

妖狐艹你老母 2022-06-13 01:47 181阅读 0赞

**本文原址：http://www.cnblogs.com/kingfly/archive/2010/01/18/1650578.html**

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->using System;   
    using System.Collections.Generic;   
      
    class DictionaryDemo   
    {   
        static void Main(string[] args)   
        {   
            DictionaryDemo001();   
            Console.ReadLine();   
      
            DictionaryDemo002();   
            Console.ReadLine();   
      
            DictionaryDemo003();   
            Console.ReadLine();   
        }   
      
        /// <summary>   
        /// 一般用法   
        /// </summary>   
        static void DictionaryDemo001()   
        {   
            Dictionary<int, string> dict = new Dictionary<int, string>();   
            dict.Add(1, "111");   
            dict.Add(2, "222");   
      
            //判断是否存在相应的key并显示   
            if (dict.ContainsKey(2))   
            {   
                Console.WriteLine(dict[2]);   
            }   
      
            //遍历Keys   
            foreach (var item in dict.Keys)   
            {   
                Console.WriteLine("Key:{0}", item);   
            }   
      
            //遍历Values   
            foreach (var item in dict.Values)   
            {   
                Console.WriteLine("value:{0}", item);   
            }   
      
            //遍历整个字典   
            foreach (var item in dict)   
            {   
                Console.WriteLine("key:{0} value:{1}", item.Key, item.Value);   
            }   
        }   
      
        /// <summary>   
        /// 参数为其它类型   
        /// </summary>   
        static void DictionaryDemo002()   
        {   
            Dictionary<string, string[]> dict = new Dictionary<string, string[]>();   
            dict.Add("1", "1,11,111".Split(','));   
            dict.Add("2", "2,22,222".Split(','));   
            Console.WriteLine(dict["2"][2]);   
        }   
      
        /// <summary>   
        /// 调用自定义类   
        /// </summary>   
        static void DictionaryDemo003()   
        {   
            Dictionary<int, yongfa365> dict = new Dictionary<int, yongfa365>();   
            for (int i = 0; i < 10; i++)   
            {   
                yongfa365 y = new yongfa365();   
                y.UserCode = i;   
                y.UserName = "www.yongfa365.com " + i.ToString();   
                dict.Add(i, y);   
            }   
            foreach (var item in dict)   
            {   
                Console.WriteLine("{0} One:{1} UserName:{2}", item.Key, item.Value.UserCode, item.Value.UserName);   
            }   
        }   
    }   
      
    class yongfa365   
    {   
        public int UserCode { get; set; }   
        public string UserName { get; set; }   
      
    }