Question

我在c＃中创建了这个程序，它实现了IComparable接口来比较车辆名称并按字母顺序排序。代码编译成功但执行时却给了我StackOverFlowExecption。这是我的代码 -

  class Vehicle:IComparable
  {
    private string vehiclename 
    { 
        get 
        { return vehiclename; 
        }
        set
        {
            vehiclename = value;
        }
    }


    public Vehicle(string name)
    {
        vehiclename = name;
    }


    int IComparable.CompareTo(Object obj)
    {
        Vehicle temp = (Vehicle)obj;
        return string.Compare(this.vehiclename, temp.vehiclename);
    }

    static void Main(string[] args)
    {
        Vehicle[] myvehicles = new Vehicle[5];
        myvehicles[0] = new Vehicle("Honda City");
        myvehicles[1] = new Vehicle("Nano");
        myvehicles[2] = new Vehicle("Desire");
        myvehicles[3] = new Vehicle("Santro");
        myvehicles[4] = new Vehicle("Nissan");

        Console.WriteLine("Unordered List of vehicles:");
        foreach (Vehicle v in myvehicles)
            Console.WriteLine(myvehicles);

        Array.Sort(myvehicles);

        Console.WriteLine("ordered List of vehicles:");
        foreach (Vehicle v in myvehicles)
            Console.WriteLine(myvehicles);

    }
}

此异常的原因是什么？如何解决？

Answer 1

private string vehiclename 
    { 
        get 
        { 
            return vehiclename; 
        }
        set
        {
            vehiclename = value;
        }
    }

您正在使用此代码创建循环！

当您为属性vehiclename设置值时，“value”被分配给vehiclename，“value”被分配给vehiclename，“value”被分配给vehiclename ...

可以通过重命名属性来解决这个问题：

     private string Vehiclename 
            { 
                get 
                { 
                    return vehiclename; 
                }
                set
                {
                    vehiclename = value;
                }
            }
    string vehiclename = string.Empty;

Answer 2

您的get和set会自行调用：

private string vehiclename 
{ 
    get 
    { return vehiclename; 
    }
    set
    {
        vehiclename = value;
    }
}

因此，访问此属性（对于get或set）将导致发生溢出。

我怀疑你要么auto-implemented property：

private string vehiclename 
{ 
    get;
    set;
}

或者提供您自己的支持字段：

private string _vehiclename;
private string vehiclename 
{ 
    get 
    { return _vehiclename; 
    }
    set
    {
        _vehiclename = value;
    }
}

或者，您可能根本不想要属性（private属性非常罕见）并且只想要一个字段：

private string vehiclename;

Answer 3

您的属性导致堆栈溢出异常。让我们来看看：

private string vehiclename 
{ 
    get 
    { return vehiclename; 
    }
    set
    {
        vehiclename = value;
    }
}

在调用vehiclename的setter时，它会将值分配给调用setter的属性vehiclename ....这当然是堆栈溢出。使用属性时，您应该坚持使用自动实现的属性或有效的支持字段。

StackOverflowException的原因是什么以及如何解决？

3 个答案: