C#格式化數(shù)值結(jié)果表

1、C#格式化數(shù)值結(jié)果表字符說明示例輸出C貨幣string.Format("0:C3", 2)2.000D十進(jìn)制string.Format("0:D3", 2)002E科學(xué)計(jì)數(shù)法1.20E+0011.20E+001G常規(guī)string.Format("0:G", 2)2N用分號(hào)隔開的數(shù)字string.Format("0:N", 250000)250,000.00X十六進(jìn)制string.Format("0:X000", 12)Cstring.Format("0:000.000", 1

2、2.2)012.200StringsThere really isn't any formatting within a strong, beyond it's alignment. Alignment works for any argument being printed in a String.Format call.  SampleGeneratesString.Format("->1,10<-", "Hello");-> Hello<-String.Format("->1,-10

3、<-", "Hello");->Hello <-NumbersBasic number formatting specifiers: SpecifierTypeFormat Output (Passed Double 1.42)Output (Passed Int -12400)cCurrency0:c1.42-12,400dDecimal (Whole number)0:dSystem.FormatException-12400eScientific0:e1.420000e+000-1.240000e+004fFixed point0

4、:f1.42-12400.00gGeneral0:g1.42-12400nNumber with commas for thousands0:n1.42-12,400rRound trippable0:r1.42System.FormatExceptionxHexadecimal0:x4System.FormatExceptioncf90Custom number formatting: SpecifierTypeExample Output (Passed Double 1500.42)Note0Zero placeholder0:00.00001500.4200Pads with

5、 zeroes.#Digit placeholder0:(#).#(1500).42 .Decimal point0:0.01500.4 ,Thousand separator0:0,01,500Must be between two zeroes.,.Number scaling0:0,. 2Comma adjacent to Period scales by 1000.%Percent0:0%150042%Multiplies by 100, adds % sign.eExponent placeholder0:00e+015e+2Many exponent forma

6、ts available.;Group separatorsee below  The group separator is especially useful for formatting currency values which require that negative values be enclosed in parentheses. This currency formatting example at the bottom of this document makes it obvious:DatesNote that date formatting is

7、especially dependant on the system's regional settings; the example strings here are from my local locale. SpecifierTypeExample (Passed System.DateTime.Now)dShort date10/12/2002DLong dateDecember 10, 2002tShort time10:11 PMTLong time10:11:29 PMfFull date & time December 10, 2002 10:11 P

8、MFFull date & time (long)December 10, 2002 10:11:29 PMgDefault date & time10/12/2002 10:11 PMGDefault date & time (long)10/12/2002 10:11:29 PMMMonth day patternDecember 10rRFC1123 date stringTue, 10 Dec 2002 22:11:29 GMTsSortable date string2002-12-10T22:11:29uUniversal sortable, local t

9、ime2002-12-10 22:13:50ZUUniversal sortable, GMTDecember 11, 2002 3:13:50 AMYYear month patternDecember, 2002The 'U' specifier seems broken; that string certainly isn't sortable.Custom date formatting: SpecifierTypeExample Example OutputddDay0:dd10dddDay name0:dddTueddddFull day name

10、0:ddddTuesdayf, ff, .Second fractions0:fff932gg, .Era0:ggA.D.hh2 digit hour0:hh10HH2 digit hour, 24hr format0:HH22mmMinute 00-590:mm38MMMonth 01-120:MM12MMMMonth abbreviation0:MMMDecMMMMFull month name0:MMMMDecemberssSeconds 00-590:ss46ttAM or PM0:ttPMyyYear, 2 digits0:yy02yyyyYear0:yyyy2002zzTimezo

11、ne offset, 2 digits0:zz-05zzzFull timezone offset0:zzz-05:00:Separator0:hh:mm:ss10:43:20/Separator0:dd/MM/yyyy10/12/2002Enumerations SpecifierTypegDefault (Flag names if available, otherwise decimal)fFlags alwaysdInteger alwaysxEight digit hex.Some Useful ExamplesString.Format("0:#,#0.00;(

12、#,#0.00);Zero", value);This will output "1,240.00" if passed 1243.50. It will output the same format but in parentheses if the number is negative, and will output the string "Zero" if the number is zero.This will output "(800) 555-1212". 變量.ToString()字符型轉(zhuǎn)換 轉(zhuǎn)為字符串 12345.ToString("n"); /生成 12,345.00 12345.ToString("C"); /生成 ￥12,345.