Question

我可以将一个字符串变为货币格式而不是另一个。该计划的目的是计算2014年的税收支付金额，并显示收入水平所需的税收以及您将带回家的税额。

private void calculate_Click(object sender, RoutedEventArgs e)
{
    double income = double.Parse(taxInput.Text);
    taxOutput.Text = calculateTaxes(income);
    takeHome.Text = calculateTakeHome(taxOutput.Text, income);        
}

private string calculateTakeHome(string p, double income)
{
    double numOne = double.Parse(p);
    double outcome = income - numOne;
    return outcome.ToString("C2"); 

}

private string calculateTaxes(double income)
{
    double total;
    if (income > 406750)
    {
        total = bracketSeven(income);
    }
    else if (income > 405100)
    {
        total = bracketSix(income);
    }
    else if (income > 186350)
    {
        total = bracketFive(income);
    }
    else if (income > 89350)
    {
        total = bracketFour(income);
    }
    else if (income >36900)
    {
        total = bracketThree(income);
    }
    else if (income > 9075)
    {
        total = bracketTwo(income);
    }
    else
    {
        total = bracketOne(income);
    }
    return total.ToString();
}

private double bracketOne(double income)
{
    double tax = income * .1;
    return tax;
}

private double bracketTwo(double income)
{
    double tax = ((income - 9075) * .15) + 907.5;
    return tax;
}

private double bracketThree(double income)
{
    double tax = ((income - 36900) * .25) + 5081.25;
    return tax;
}

private double bracketFour(double income)
{
    double tax = ((income - 89350) * .28) + 18193.75;
    return tax;
}

private double bracketFive(double income)
{
    double tax = ((income - 186350) * .33) + 45353.75;
    return tax;
}

private double bracketSix(double income)
{
    double tax = ((income - 405100) * .35) + 117541.25;
    return tax;
}

private double bracketSeven(double income)
{
    double tax = ((income - 406750) * .396) + 118188.75;
    return tax;
}

我可以使用return outcome.ToString("C2")以货币格式显示takeHome.Text，但是当我把＆＃34; C2＆＃34;像这样的calculateTaxes（）函数：return total.ToString("C2");我得到一个错误，说我的解析是不正确的。程序编译但在我尝试计算时抛出异常。

我试图用＆＃34; C2＆＃34;解析它。在大约5种其他方式中它仍然会抛出相同的异常，任何想法？

Answer 1

问题是您尝试使用货币符号将字符串解析为double。您可以使用格式化来完成此操作。例如，您可以尝试下面的内容

    private static string calculateTakeHome(string p, double income)
    {
        double numOne = double.Parse(p,System.Globalization.NumberStyles.Currency);
        double outcome = income - numOne;
        return outcome.ToString("C2");

    }

货币格式问题

1 个答案: