C# 如何将数据保留3位小数？

[tanfe12]

就是不原始数据是几位，都保留3位 位数不够用0 填补
比如 3.3转化为 3.300
Math.Round(b1, 3); 用了 但是不行
各位大大 有谁知道 怎么弄么？

[zsuswy]

double d = 19.3330000;
string s = d.ToString("0.###");
MessageBox.Show(s);

[初吻给了烟]

string str = Math.Round(b1, 3).ToString("0.000");

[txlovenb]

float A=3.3;
string B=A.tostring("0.000");

A=single.parse(B);

[hhwydwfg]

Console.WriteLine(Math.Round(4.4)); // 4
    Console.WriteLine(Math.Round(4.5)); // 4
    Console.WriteLine(Math.Round(4.6)); // 5
    Console.WriteLine(Math.Round(5.5)); // 6


Math.Round(3.44, 1); //Returns 3.4.
Math.Round(3.45, 1); //Returns 3.4.
Math.Round(3.46, 1); //Returns 3.5.

[tigerleq]

string s = d.ToString("0.###");

[hhwydwfg]

　
    double s=0.55555;
　　result=s.ToString("#0.00");//点后面几个0就保留几位

string str1 = String.Format("{0:N1}",56789); //result: 56,789.0
string str2 = String.Format("{0:N2}",56789); //result: 56,789.00
string str3 = String.Format("{0:N3}",56789); //result: 56,789.000
string str8 = String.Format("{0:F1}",56789); //result: 56789.0
string str9 = String.Format("{0:F2}",56789); //result: 56789.00
string str11 =(56789 / 100.0).ToString("#.##"); //result: 567.89
string str12 =(56789 / 100).ToString("#.##"); //result: 567

[asd03055zx]

string str = a.Tostring("0.###");

[duxj007]

string s = d.ToString("0.###");

[xray2005]

double s=0.55555;
　　result=s.ToString("#0.00");//点后面几个0就保留几位

string str1 = String.Format("{0:N1}",56789); //result: 56,789.0
string str2 = String.Format("{0:N2}",56789); //result: 56,789.00
string str3 = String.Format("{0:N3}",56789); //result: 56,789.000
string str8 = String.Format("{0:F1}",56789); //result: 56789.0
string str9 = String.Format("{0:F2}",56789); //result: 56789.00
string str11 =(56789 / 100.0).ToString("#.##"); //result: 567.89
string str12 =(56789 / 100).ToString("#.##"); //result: 567

[hhwydwfg]

string.format

[zhanmu]

string.format