c# string.format

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

 

字符	说明	示例	输出
C 或 c	货币	Console.Write("{0:C}", 2.5); Console.Write("{0:C}", -2.5);	$2.50 ($2.50)
D 或 d	十进制数	Console.Write("{0:D5}", 25);	00025
E 或 e	科学型	Console.Write("{0:E}", 250000);	2.500000E+005
F 或 f	固定点	Console.Write("{0:F2}", 25); Console.Write("{0:F0}", 25);	25.00 25
G 或 g	常规	Console.Write("{0:G}", 2.5);	2.5
N 或 n	数字	Console.Write("{0:N}", 2500000);	2,500,000.00
X 或 x	十六进制	Console.Write("{0:X}", 250); Console.Write("{0:X}", 0xffff);	FA FFFF