检查列表是否已包含项目？

Question

I used a struct

public struct stuff
{
    public int ID;
    public int quan;
}

in List<stuff> stuff = new List<stuff>();

How i can check the list already have a stuff "where ID = 1"?

Answer 1

您可以非常轻松地使用LINQ

bool res = stuff.Any(c => c.ID == 1);

Answer 2

bool isContains = stuff.Any(x => x.ID == 1);

Answer 3

if(stuf.Select(x => x.id).Contains(1))
{
    //Do Stuff
}