使用 LINQ 的项目列表中的 GroupBy

Question

I have a list that contains item like below:

Now I want to group according to language index ( Languages[x] ) like below:

Group-1:
model.Languages[0].Employer
model.Languages[0].Title

Group-2:
model.Languages[1].Employer
model.Languages[1].Title

Can AnyBody tell me how can I do this?

Answer 1

If you believe your values will be consistent, you can try the below:

var groupedLanguages = languages.GroupBy(c => c.Substring(0, c.LastIndexOf('.')));

That will group by: "model.Languages[xx]"

Answer 2

您可以使用正则表达式来提取密钥：

var grouped = languages.GroupBy(l => Regex.Match(l, @"Languages\[\d+\]").Value);