Question

我曾尝试阅读有关此主题的其他帖子，但无法弄清楚这一点。

我在C＃中有一个列表，我想把它放在一个包含所有相同键的字典中。列表是这个

string[] IN ={"Against","Like","Upon","Through","Of","With","Upon","On","Into","From","by","that","In","About","For"
    ,"Along","Before","Beneath","At","Across","beside","After","Though","Among","Toward","If"};

我想创建并填充一个字典，其中键为“IN”（数组的名称），然后在字典中为数组提供每个字符串。

这是我写的创建字典（我不确定是否正确）：

Dictionary<string, List<string>> wordDictionary = new Dictionary<string, List<string>> ()

但我不知道如何填写字典。

任何帮助都会非常感激，因为这是我第一次尝试使用字典而且我是C＃的新手

Answer 1

数组是string[]，而不是List<string>，所以只需执行此操作：

Dictionary<string, string[]> wordDictionary = new Dictionary<string, string[]>();

现在您可以照常添加数组。

wordDictionary.Add("IN", IN);

或者：

wordDictionary.Add("IN", new string[] {"Against","Like","Upon","Through","Of","With","Upon","On","Into","From","by","that","In","About","For","Along","Before","Beneath","At","Across","beside","After","Though","Among","Toward","If"});

Answer 2

您目前有一个字符串 array ，而不是列表 - 所以应该是：

Dictionary<string, string[]> wordDictionary  = new Dictionary<string,string[]> ()

然后你可以添加如下项目：

wordDictionary.Add("IN" , IN);

Answer 3

Dictionary.Add("IN", new List<string>(IN));

...如果您想保留字典的当前签名。

如果您将其更改为Dictionary<string, string[]>，那么您可以：

Dictionary.Add("IN",IN);

Answer 4

您真的需要将数组转换为字符串吗？您可以在字典中使用string []而不是List：

var wordDictionary = new Dictionary<string, string[]>();
wordDictionary.Add("IN", IN);

但是如果你真的想将你的字符串数组转换为List：

var wordDictionary = new Dictionary<string, List<string>>();
wordDictionary.Add("IN", IN.ToList());

Answer 5

将数组（它不是列表）添加到字典的另一种方法是使用集合初始值设定项：

var wordDictionary = new Dictionary<string, string[]> { "IN", IN };

这与正好与以正常方式创建字典然后调用Add("IN", IN)相同。

在C＃中将数组添加到字典

5 个答案: