SortedDictionary分类字典和Dictionary字典的区别

        static void Main(string[] args)
        {
            TestSortedDictionary();
            TestSortedDictionary2();
            TestDictionary();
            Console.Read();
        }

 

默认:测试SortedDictionary分类字典

 /// <summary>
        /// 测试SortedDictionary分类字典
        /// </summary>
        private static void TestSortedDictionary()
        {
            Console.WriteLine("\n\n\n-----测试SortedDictionary分类字典-----");
            SortedDictionary<string, string> sd = new SortedDictionary<string, string>();
            sd.Add("a", "aaa");
            sd.Add("c", "bbb");
            sd.Add("b", "ccc");
            sd.Add("d", "ddd");

            foreach (KeyValuePair<string, string> item in sd)
            {
                Console.Write("键名:" + item.Key + " 键值:" + item.Value + "\r\n");
            }

        }

默认:测试Dictionary字典

/// <summary>
        /// 测试Dictionary字典
        /// </summary>
        private static void TestDictionary()
        {
            Console.WriteLine("\n\n\n-----测试Dictionary字典-----");
            Dictionary<string, string> testdict = new Dictionary<string, string>();
            testdict.Add("a", "a");
            testdict.Add("c", "c");
            testdict.Add("b", "b"); 
            testdict.Add("d", "d"); 
            testdict.Remove("a");
            testdict.Add("a", "a");
            foreach (KeyValuePair<string, string> item in testdict)
            {
               Console.Write("键名:" + item.Key + " 键值:" + item.Value + "\r\n");
            }

        }

 

测试SortedDictionary分类字典的正序和反序

/// <summary>
        /// 测试SortedDictionary分类字典的正序和反序
        /// </summary>
        private static void TestSortedDictionary2()
        {
            Console.WriteLine("\n\n\n-----测试SortedDictionary分类字典的正序和反序-----");
            SortedDictionary<string, string> sd = new SortedDictionary<string, string>();
            sd.Add("a", "aaa");
            sd.Add("c", "bbb");
            sd.Add("b", "ccc");
            sd.Add("d", "ddd");

            Console.Write("\r\n正序排序数据:\r\n");
            foreach (KeyValuePair<string, string> item in sd)
            {
                Console.Write("键名:" + item.Key + " 键值:" + item.Value + "\r\n");
            }

            //重新封装到Dictionary里(PS:因为排序后我们将不在使用排序了,所以就使用Dictionary)
            Dictionary<string, string> dc = new Dictionary<string, string>();
            foreach (KeyValuePair<string, string> item in sd.Reverse())
            {
                dc.Add(item.Key, item.Value);
            }
            sd = null;
            //再看其输出结果:
            Console.Write("\r\n反序排序数据:\r\n");
            foreach (KeyValuePair<string, string> item in dc)
            {
                Console.Write("键名:" + item.Key + " 键值:" + item.Value + "\r\n");
            }
        }

 

结果:

 

总结:

SortedDictionary的特性无论插入字典的数据是乱序还是有序,他都会根据ASCII码从小到大排序

Dictionary则是根据插入顺序进行的排序

 

posted @ 2019-04-17 16:37  橙-极纪元JJYCheng  阅读(553)  评论(0编辑  收藏  举报