c# - LINQ GroupBy - 按名称选择最低 ID 组

Question

我想弄清楚如果名称相同，如何只选择 ID 最低的对象:

public class BasicInfo
{
    public int Id {get;set;}
    public string Name {get; set;}
}

List<BasicInfo> BasicInfos = new List<BasicInfo>();
BasicInfos.Add(new BasicInfo() { Id = 1, Name = "John" });
BasicInfos.Add(new BasicInfo() { Id = 2, Name = "John" });

BasicInfos = BasicInfos.GroupBy(y => y.Name)...(What goes here?)

Answer 1

类似的东西:

BasicInfos = BasicInfos.GroupBy(y => y.Name)
                       .Select(y => new BasicInfo{ Name = y.Key, Id = y.Min(x => x.Id));

这将为您提供所有具有最低键的名称。