合并字典在关键水平，然后在价值水平 [英] Merging dictionaries in key level and then in value level

问题描述

我有两个字典，如

Dictionary<String, String> one = new Dictionary<string, string>
{
    { "A", "1" },
    { "B", "2" },
    { "C", "3" },
    { "D", "4" },
    { "E", "5" },
    { "F", "6" },
    { "G", "7" },
    { "H", "8" }
};

Dictionary<String, String> two = new Dictionary<string, string>
{
    { "A", "1" },
    { "B", "2" },
    { "C", "3" },
    { "E", "4" },
    { "F", "4" },
    { "I", "6" },
    { "J", "10" },
    { "K", "11" }
};

我需要在关键级别合并两个字典，然后在值级别中并添加生成的字典进入新字典三，结果字典不应该有相同的键或相同的值，在这种情况下，生成的字典就像

i need to merge the two dictionary in key level and then in value level and to add the resulting dictionary into the new dictionary three, the resulting dictionary should not have same keys or same values and in this case the resulting dictionary is like

Dictionary<String, String> three = new Dictionary<string, string>
{
    { "A", "1" },
    { "B", "2" },
    { "C", "3" },
    { "D", "4" },
    { "E", "5" },
    { "F", "6" },
    { "G", "7" },
    { "H", "8" },
    { "J", "10" },
    { "K", "11" }
};

现在我正在使用像

1. 联合两个字典中的所有键


2. 使用新的键创建新字典


3. 删除重复值相同的值）

编辑：如果这两个字典具有相同的键值对，那么我需要存储来自第一个字典的键值对。

EDIT: if both the dictionaries having same key value pair then i need to store the the key value pair from the first dictionary .

有没有办法使用LINQ？
提前感谢

is there any way to do this using LINQ? Thanks in advance

推荐答案

一个选项，使用字典是键/值对序列的事实：

One option, using the fact that a dictionary is a sequence of key/value pairs:

var dictionary = dictionary1.Concat(dictionary2)
                            .ToLookup(pair => pair.Key, pair => pair.Value)
                            .ToDictionary(x => x.Key, x => x.First());

将工作。

That's not terribly efficient, admittedly (as it essentially builds up a hash table twice) but I believe it will work.

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