抛出了类型'System.StackOverflowException'的异常

Question

当编译器执行set属性时,我的程序抛出此异常('System.StackOverflowException').

葡萄酒类:

class wine
{
    public int year;
    public string name;
    public static int no = 5;

    public wine(int x, string y)
    {
        year = x;
        name = y;
        no++;
    }

    public int price
    {
        get
        {
            return no * 5;
        }

        set
        {
            price = value;
        }
    }
}

program.cs类:

class Program {static void Main(string [] args){

class Program
{
    static void Main(string[] args)
    {
        wine w1 = new wine(1820, "Jack Daniels");

        Console.WriteLine("price is " + w1.price);
        w1.price = 90;
        Console.WriteLine(w1.price);
        Console.ReadLine();
    }
}

Answer 1

设置price属性时,调用setter,它会调用调用setter的setter等.

解:

public int _price;
public int price
{
    get
    {
        return no * 5;
    }

    set
    {
        _price = value;
    }
}

Answer 2

您正在设置器中设置setter的值.这是一个无限循环,因此是StackOverflowException.

您可能打算no根据您的getter 使用支持字段:

public int price
{
    get
    {
        return no * 5;
    }

    set
    {
        no = value/5;
    }
}

或者可能使用自己的支持领域.

private int _price;
public int price
{
    get
    {
        return _price;
    }

    set
    {
        _price = value;;
    }
}

但是,如果是后者,则根本不需要支持字段,可以使用auto属性:

public int price { get; set; } // same as above code!

(旁注:属性应以大写开头 - Price不是price)