c# - 四舍五入小数位不起作用？

Question

这样做:

double dblRateEvalResult = -0.52;
string strNewResult = dblRateEvalResult.ToString("000.####").TrimStart('-');

我要:

000.5200

我得到:

000.52

我做错了什么？

Answer 1

您需要 0 自定义说明符而不是 #

string str =  dblRateEvalResult.ToString("000.0000").TrimStart('-');

(在您的代码中，您试图将字符串分配给 double 值，我猜这是一个错字)

参见:The "0" custom format specifier - Custom Numeric Format Strings

If the value that is being formatted has a digit in the position where the zero appears in the format string, that digit is copied to the result string; otherwise, a zero appears in the result string.