在C#中使用LINQ进行字典操作 [英] Dictionary Manipulation Using LINQ in C#

问题描述

我有类似的字典

Dictionary<String, List<String>> MyDict = new Dictionary<string, List<string>>
{
    {"One",new List<String>{"A","B","C"}},
    {"Two",new List<String>{"A","C","D"}}
};

我需要从该词典中获取一个List<String>，该列表应包含与上述词典中的值不同的项目.

I need to get a List<String> from this dictionary, The List should contain Distinct items from the values of the above dictionary.

因此，结果列表将包含{"A","B","C","D"}.

So the resulting List will contain {"A","B","C","D"}.

现在我正在使用for循环和Union操作.喜欢

Now I'm using for loop and Union operation. Like

List<String> MyList = new List<string>();
for (int i = 0; i < MyDict.Count; i++)
{
    MyList = MyList.Union(MyDict[MyDict.Keys.ToList()[i]]).Distinct().ToList();
}

有人可以建议我在LINQ或LAMBDA表达式中执行此操作吗?

Can any one suggest me a way to do this in LINQ or LAMBDA Expression.

推荐答案

var items=MyDict.Values.SelectMany(x=>x).Distinct().ToList();

或其他选择:

var items = (from pair in MyDict
             from s in pair.Value
             select s).Distinct().ToList();

这篇关于在C#中使用LINQ进行字典操作的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！