通过LINQ删除父类类型列表的项目

Question

我有一个父类列表，包含由子类组成的对象项。例如

Class Vehicle
{
String Name;
}

Class Car: Vehicle
{
int Speed;
}

Class Bike: Vehicle
{
int Milage;
}

List<Vehicle> transports = new List<Vehicle>;
transports.Add(new Car{Name = "Fiat", Speed = 70});
transports.Add(new Bike{Name = "Bajaj", Milage = 70});
transports.Add(new Car{Name = "BMW", Speed = 100});

现在我要删除速度为100的汽车类型的物品。我该怎么做。优先通过linq

Answer 1

transports.RemoveAll(x => x is Car && (x as Car).Speed == 100);

Answer 2

这就是你想要的：

var carsToRemove = transports.OfType<Car>().Where(c => c.Speed == 100).ToArray();

foreach (var car in carsToRemove)
{
    transports.Remove(car);
}

Answer 3

试试此代码： 您可以使用RemoveAll

删除项目

transports.RemoveAll(c => c is Car && (c as Car).Speed == 100);

我希望它会对你有所帮助。