使用linq填充字典

Question

I have the following empty Dictionary

Dictionary<Guid, string> appTypeMap = new Dictionary<Guid, string>();

and the following list:

List<ApplicationType> allApplicationTypes = _applicationTypeService.GetAll()

Application type is described as follows:

public class ApplicationType
{
   public Guid id {get; set;}
   public String name {get; set;}
}

I want to populate the dictionary using LINQ.
How do I do that? Thanks.

Answer 1

appTypeMap = allApplicationTypes.ToDictionary(x => x.id, x => x.name);

但是，它会创建一个新词典，而不是填写你的词典。

Answer 2

Try

appTypeMap = _applicationTypeService.GetAll().Select(o => new DictionaryEntry{
  Key = o.id,
  Value = o.name
}).ToList();

Not sure if you need a .ToList() on the end....