如何在C#中将字符串转换为decimal []

Question

有没有办法实现这个目标？

我试过了:

string str = "{34.10,0,0.00}"; //the string as I get it from Postgres DB
decimal[] won;

won = (decimal[])(str); //Cannot convert type 'string' to 'decimal[]'

我理想的是要进入won:

won[0] = 34.10
won[1] = 0
won[2] = 0.00

当然,我可以用逗号分开,把它放在数组中,但我想知道是否有更好的方法.

Answer 1

你必须 Split

won = str.Trim('{', '}').Split(',').Select(decimal.Parse).ToArray();

编辑:这部分只是为了好玩

无法decimal[]直接将字符串转换为数组,但如果需要,可以添加小数包装类并定义隐式转换:

class MyDecimal
{
    private decimal[] _values;

    public MyDecimal(int size)
    {
        _values = new decimal[size];
    }

    public decimal this[int index]
    {
        get { return _values[index]; }
        set { _values[index] = value; }
    }

    public static implicit operator MyDecimal(string str)
    {
        var numbers = str.Trim('{', '}').Split(',');
        MyDecimal d = new MyDecimal(numbers.Length);
        d._values = numbers
                    .Select(x => decimal.Parse(x,CultureInfo.InvariantCulture))
                    .ToArray();

        return d;
    }

    public static implicit operator string(MyDecimal md)
    {
        return string.Join(",", md._values);
    }
}

然后你可以这样做:

string str = "{34.10,0,0.00}"; //the string as I get it from Postgres DB
MyDecimal won = str;