如何将包含值（以逗号分隔的字符串）的Dictionary转换为KeyValuePairs的集合？

Question

我有一本字典，例如：

    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 List ：

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

很抱歉，您对问题的话题不清楚。

Answer 1

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();

Answer 2

不使用linq

  public List<KeyValuePair<string, string>> GenerateKeyValuePair(Dictionary<string,string> dict) {
        List<KeyValuePair<string, string>> List = new List<KeyValuePair<string, string>>();
        foreach (var item in dict)
        {
                string[] values = item.Value.Split(',');
                for (int i = 0; i < values.Length; i++)
                {
                    List.Add(new KeyValuePair<string, string>(item.Key, values[i].ToString()));
                }
        }
        return List;
    }

希望有帮助（顺便说一句，Linq是最短的答案）