String.Format格式說明

C#格式化數值結果表

字符

說明

示例

輸出

C 貨幣 string.Format("{0:C3}", 2) ＄2.000 D 十進制 string.Format("{0:D3}", 2) 002 E 科學計數法 1.20E+001 1.20E+001 G 常規 string.Format("{0:G}", 2) 2 N 用分號隔開的數字 string.Format("{0:N}", 250000) 250,000.00 X 十六進制 string.Format("{0:X000}", 12) C

string.Format("{0:000.000}", 12.2) 012.200

Strings

There really isnt any formatting within a strong, beyond its alignment. Alignment works for any argument being printed in a String.Format call.

 

Sample Generates String.Format("->{1,10}<-", "Hello"); -> Hello<- String.Format("->{1,-10}<-", "Hello"); ->Hello <-

Numbers

Basic number formatting specifiers:

 

Specifier Type Format

Output
(Passed
Double 1.42)

Output
(Passed
Int -12400)

c Currency {0:c} ＄1.42 -＄12,400 d Decimal (Whole number) {0:d} System.
FormatException -12400 e Scientific {0:e} 1.420000e+000 -1.240000e+004 f Fixed point {0:f} 1.42 -12400.00 g General {0:g} 1.42 -12400 n Number with commas for thousands {0:n} 1.42 -12,400 r Round trippable {0:r} 1.42 System.
FormatException x Hexadecimal {0:x4} System.
FormatException cf90

Custom number formatting:

 

Specifier