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[ASP.net教程]Linq在Array,List,Dictionary中的应用

Linq在Array,List,Dictionary中的应用

今天在实际工作中需要对array,list,dictionary进行排序,试一试linq,发现非常好用,代码如下:

 1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Text.RegularExpressions; 6  7 namespace Test 8 { 9   class Program10   {11     static void Main(string[] args)12     {13       Console.WriteLine("Hello world!");14       string inputStr = " abf dcf    frgt  ";15       inputStr = Regex.Replace(inputStr.Trim(), " {2,}", " ");16       Console.WriteLine(inputStr);17 18       int[] num = { 1, 2, 3, 4, 5, 5, 6, 1, 3, 2 };19       //Array.Sort(num);20       var nums = (from l in num orderby l select l).ToArray();21       Console.Write("Array:\n");22       foreach (int i in nums)23         Console.Write(i.ToString());24       Console.Write("\nList:\n");25       List<int> list = new List<int>() {1,2,1,9,3,2,7 };26       list = (from l in list orderby l select l).ToList();27       foreach (var l in list)28         Console.Write(l);29       Dictionary<int, int> counts = new Dictionary<int, int>() { {1,2},{2,3},{3,1}};30       //var results = (from d in counts orderby d.Value descending select d).Take(2).ToDictionary(k => k.Key, v => v.Value);31       var results = (from d in counts orderby d.Value descending select d.Key).Take(2).ToArray();32       Console.Write("\nDictionary:\n");33       foreach (var d in results)34         Console.WriteLine(d);35       36       Console.ReadKey();37     }38   }39 }

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