Question

我正在尝试运行此代码，但a总是null。我确定有一个＜code＞名称＜/code＞，为什么它总是返回null？

   public  Animal FindAnimal(string Name)
    {
        Animal a = Animals.Find(

            delegate(Animal bk)
            {
                return bk.AnimalName.ToLower() == Name.ToLower();
            }


            );
        return a;

    }

Answer 1

你的代码对我来说很好。不过这里有一些小的优化：

public Animal FindAnimal(string name)
{
    return Animals.Find((a) => String.Equals(a.AnimalName, name, StringComparison.CurrentCultureIgnoreCase));
}

EDIT Test of code:

void Main()
{
     var foundAnimal = FindAnimal("Monkey"); //Not null
}

List<Animal> Animals = new List<Animal>(){ new Animal() { AnimalName = "Monkey" }};

public Animal FindAnimal(string name)
{
    return Animals.Find((a) => String.Equals(a.AnimalName, name, StringComparison.CurrentCultureIgnoreCase));
}   
public class Animal
{
    public string AnimalName { get; set; }
}

友情链接