I have the following
Dictionary<string,string> dict1 has 3 items
"A"="1.1"
"B"="2.1"
"C"="3.1"
Dictionary<string,string> dict2 has 3 items
"A"="1.2"
"B"="2.2"
"C"="3.2"
Dictionary<string,string> dict2 has 3 items
"A"="1.3"
"B"="2.3"
"C"="3.3"
I want a final Dict dictFinal which is of type Dictionary<string,string[]>
"A"="1.1,1.2,1.3"
"B"="2.1,2.2,2.3"
"C"="3.1,3.2,3.3"
答案 0 :(得分:3)
给定类似的键,提供所有词典的集合,并使用SelectMany
来处理动态数量的数组项:
var dictionaries = new[] { dict1, dict2, dict3 };
var result = dictionaries.SelectMany(dict => dict)
.GroupBy(o => o.Key)
.ToDictionary(g => g.Key,
g => g.Select(o => o.Value).ToArray());
dictionaries
类型可能是List<T>
,不一定是上面的数组。重要的是你将它们组合在一个集合中,以便LINQ覆盖它们。
答案 1 :(得分:1)
假设所有3个词典都具有相同的键,则应执行以下操作:
var d1 = new Dictionary<string, string>()
{
{"A", "1.1"},
{"B", "2.1"},
{"C", "3.1"}
};
var d2 = new Dictionary<string, string>()
{
{"A", "1.2"},
{"B", "2.2"},
{"C", "3.2"}
};
var d3 = new Dictionary<string, string>()
{
{"A", "1.3"},
{"B", "2.3"},
{"C", "3.3"}
};
var result = d1.Keys.ToDictionary(k => k, v => new[] {d1[v], d2[v], d3[v]});
答案 2 :(得分:0)
假设所有键都相同,最直接的方法是:
Dictionary<string,string[]> result = new Dictionary<string,string[]>();
foreach(var key in dict1.Keys)
{
result[key] = new string[]{dict1[key], dict2[key], dict3[key]};
}