C#中tostring怎么保留小数点后面3位,准备数字,不四舍五入,第四位才四舍五入 爱说篇

体说明见下: 1 string str0 = i.ToString("f"); //25.00 2 string str1 = i.ToString("f1"); //25.0 3 string str2 = i.ToString("f2"); //25.00 4 string str3 = i.ToString("f3"); //25.000 5 string str4 = i.ToString("f4"); //25.0000 其他方式的如下: 1 int i = 111125; 2 string str0 = i.ToString("n"); //111,125.00 3 string str1 = i.ToString("n1"); //111,125.0 4 string str2 = i.ToString("n2"); //111,125.00 5 string str3 = i.ToString("n3"); //111,125.000 6 string str4 = i.ToString("n4"); //111,125.0000