Array / List / Dictionary 是C#中最常用到的数据结构,都是引用类型,有时候为了不影响源数据,可以复制一份利用复件进行一些计算,有些情况下为了便于计算,还需要对数据结构进行转换,下面整理了Array / List / Dictionary两两相互转换的方法,希望可以帮到大家~
//先声明,接下来对数据进行转换
string[] testAarray = new string[] { "array01", "array02", "array03", "array04", "array05" };
List<string> testList = new List<string>() { "list01", "list02", "list03", "list04", "list05" };
Dictionary<int, string> testDic = new Dictionary<int, string>() { { 1, "dictionary01" }, { 2, "dictionary02" }, { 3, "dictionary03" } };
//Array数组的 复制、转List、转Dictionary
//Array复制
string[] copyArray = new string[5];
//目标数组.CopyTo(接收数组, 复制起点)
testAarray.CopyTo(copyArray, 0);
//Array转List
List<string> arrayToList = new List<string>(testAarray);
//Array转Dictionary
//命名空间using System.Linq;
//Array下标作为Dictionary的key,元素作为value,利用lambda转换
Dictionary<int, string> arrayToDic = testAarray.ToDictionary(arrayItem => System.Array.IndexOf(testAarray, arrayItem), arrayItem => arrayItem);
//List列表的 复制、转Array、转Dictionary
//List复制
List<string> copyList = new List<string>(testList);
//List转Array
string[] listToArray = testList.ToArray();
//List复制到Array
//调用与Aarray.CopyTo相同,实现的功能貌似和List.ToArray()一样
string[] listCopyToArray = new string[5];
testList.CopyTo(listCopyToArray, 0);
//List转Dictionary
//与Array转Dictionary相同
Dictionary<int, string> listToDic = testList.ToDictionary(listItem => testList.IndexOf(listItem), listItem => listItem);
//Dictionary字典的 复制、转Array、转List
//Dictionary复制
Dictionary<int, string> copyDic = new Dictionary<int, string>(testDic);
//Dictionary转Array
int[] dictionaryKeyToArray = testDic.Keys.ToArray<int>();
string[] dictionaryToArray = testDic.Values.ToArray<string>();
//Dictionary转List
List<int> dictionaryKeyToList = testDic.Keys.ToList<int>();
List<string> dictionaryToList = testDic.Values.ToList<string>();