c# - 如何将包含逗号分隔字符串值的字典转换为键值对集合？

Question

我有一本像这样的字典:

    Dictionary<string, string> myDict = new Dictionary<string, string>
    {
        { "key1", "value1,value2,value3" },
        { "key2", "value4,value5" }
    }

如何转换为具有以下性质的 KeyValuePair 的 List:

    List<KeyValuePair<string, string>> myList = n List<KeyValuePair<string, string>>
    {
        { "key1", "value1" },
        { "key1", "value2" },
        { "key1", "value3" },
        { "key2", "value4" },
        { "key2", "value5" }
    }

很抱歉问题主题可能不清楚。

Answer 1

这个转换的关键是SelectMany方法:

var res = myDict
    .SelectMany(p => p.Value.Split(',').Select(s => new KeyValuePair<string, string>(p.Key, s)))
    .ToList();