C＃动作 <T> ，传递函数作为参数

Question

I want to pass a condition as Action to another method. First line in "ComputerPriceGenerator" works, but how to make the array work (second line)?.. Any ideas

I'm looking for advice..., CalculateAllPrice is not designed yet

public void ComputerPriceGenerator()
{
    //Below line Works
    PriceMachine.CalculatePrice(cart.Computers[0],() => ComputerConverter(cart.Computers[0]));           
    //How to make this work, i don't want to loop it???
    PriceMachine.CalculateAllPrice(cart.Computers,() => ComputerConverter(??));
}

public void ComputerConverter(Computer comp)
{
    if (comp.Memory <= 2)
        comp.Discount = 10;
}

Answer 1

Your CalculatePrice method shouldn't take just Action , IMO - both methods should take Action<Computer> . So I would have the methods like this:

public static void CalculatePrice(Computer computer, Action<Computer> action)
public static void CalcuateAllPrices(IEnumerable<Computer> computers,
                                     Action<Computer> action)

and call them like this:

PriceMachine.CalculatePrice(cart.Computers[0], ComputerConverter);
PriceMachine.CalculateAllPrice(cart.Computers, ComputerConverter);

Answer 2

As you want to apply the method to all elements of the array, you won't get around iterating over it.

You could define PriceMachine.CalculateAllPrice as such:

public void CalculateAllPrice(IEnumerable<Computer> data, Action<Computer> action)
{
  foreach(Computer c in data)
    action(c);
}

Answer 3

PriceMachine.CalculateAllPrice(cart.Computers, (Computer x) => ComputerConverter(x));

然后使CalculateAllPrice迭代通过cart.Computers并将每个传递给匿名函数。