C#数组,List,Dictionary的相互转换

在C#中，数组、List和Dictionary是常见的数据结构。下面介绍它们之间的相互转换方法。

1. 数组转List

int[] arr = { 1, 2, 3 };
List<int> list = arr.ToList();

2. List转数组

List<int> list = new List<int>() { 1, 2, 3 };
int[] arr = list.ToArray();

3. 数组转Dictionary

string[] arr = { "a", "b", "c" };
Dictionary<int, string> dict = arr.Select((s, i) => new { Key = i, Value = s }).ToDictionary(p => p.Key, p => p.Value);

4. List转Dictionary

List<string> list = new List<string>() { "a", "b", "c" };
Dictionary<int, string> dict = list.Select((s, i) => new { Key = i, Value = s }).ToDictionary(p => p.Key, p => p.Value);

5. Dictionary转数组

Dictionary<int, string> dict = new Dictionary<int, string>() { { 0, "a" }, { 1, "b" }, { 2, "c" } };
string[] arr = dict.Values.ToArray();

6. Dictionary转List

Dictionary<int, string> dict = new Dictionary<int, string>() { { 0, "a" }, { 1, "b" }, { 2, "c" } };
List<string> list = dict.Values.ToList();