C#中Console.WriteLine()函數輸出格式詳解


格式項都采用如下形式:

{index[,alignment][:formatString]}   

 

其中"index"指索引占位符,這個肯定都知道;

",alignment"按字面意思顯然是對齊方式,以","為標記;

":formatString"就是對輸出格式的限定,以":"為標記。

 

alignment:可選,是一個帶符號的整數,指示首選的格式化字段寬度。如果“對齊”值小於格式化字符串的長度,“對齊”會被忽略,並且使用格式化字符串的長度作為字段寬度。如果“對齊”為正數,字段的格式化數據為右對齊;如果“對齊”為負數,字段的格式化數據為左對齊。如果需要填充,則使用空白。如果指定“對齊”,就需要使用逗號。

 

formatString:由標准或自定義格式說明符組成.

 

下表是從網上得來:

 

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

 

 

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

 

 

Specifier

Type

Example (Passed System.DateTime.Now)

d

Short date

10/12/2002

D

Long date

December 10, 2002

t

Short time

10:11 PM

T

Long time

10:11:29 PM

f

Full date & time

December 10, 2002 10:11 PM

F

Full date & time (long)

December 10, 2002 10:11:29 PM

g

Default date & time

10/12/2002 10:11 PM

G

Default date & time (long)

10/12/2002 10:11:29 PM

M

Month day pattern

December 10

r

RFC1123 date string

Tue, 10 Dec 2002 22:11:29 GMT

s

Sortable date string

2002-12-10T22:11:29

u

Universal sortable, local time

2002-12-10 22:13:50Z

U

Universal sortable, GMT

December 11, 2002 3:13:50 AM

Y

Year month pattern

December, 2002

 

 

Specifier

Type

Example

Example Output

dd

Day

{0:dd}

10

ddd

Day name

{0:ddd}

Tue

dddd

Full day name

{0:dddd}

Tuesday

f, ff, ...

Second fractions

{0:fff}

932

gg, ...

Era

{0:gg}

A.D.

hh

2 digit hour

{0:hh}

10

HH

2 digit hour, 24hr format

{0:HH}

22

mm

Minute 00-59

{0:mm}

38

MM

Month 01-12

{0:MM}

12

MMM

Month abbreviation

{0:MMM}

Dec

MMMM

Full month name

{0:MMMM}

December

ss

Seconds 00-59

{0:ss}

46

tt

AM or PM

{0:tt}

PM

yy

Year, 2 digits

{0:yy}

02

yyyy

Year

{0:yyyy}

2002

zz

Timezone offset, 2 digits

{0:zz}

-05

zzz

Full timezone offset

{0:zzz}

-05:00

:

Separator

{0:hh:mm:ss}

10:43:20

/

Separator

{0:dd/MM/yyyy}

10/12/2002

 

示例:

 

// Console.WriteLine 中各種數據格式的輸出

            Console.WriteLine("{0, 8 :C}", 2);     // $2.00

            Console.WriteLine("{0, 8 :C3}", 2);    // $2.000

            Console.WriteLine("{0 :D3}", 2);       // 002

            Console.WriteLine("{0 :E}", 2);        // 2.000000E+000

            Console.WriteLine("{0 :G}", 2);        // 2

            Console.WriteLine("{0 :N}", 2500000.00);    // 2,500,00.00

            Console.WriteLine("{0 :x4}", 12);      // 000c

            Console.WriteLine("{0, 2 :x}", 12);    //  c

            Console.WriteLine("{0 :000.000}", 12.23);   // 012.230

            Console.WriteLine("{0 :r}", 15.62);    // 15.62

            Console.WriteLine("{0 :d}", System.DateTime.Now);    // 2012-3-27

            Console.WriteLine("{0 :D}", System.DateTime.Now);    // 2012年3月27日

 

            Console.WriteLine("{0 :t}", System.DateTime.Now);    // 11:43

            Console.WriteLine("{0 :T}", System.DateTime.Now);    // 11:43:34

 

            Console.WriteLine("{0 :f}", System.DateTime.Now);    // 2012年3月27日 11:43

            Console.WriteLine("{0 :F}", System.DateTime.Now);    // 2012年3月27日 11:43:34

 

            Console.WriteLine("{0 :g}", System.DateTime.Now);    // 2012-3-27 11:43

            Console.WriteLine("{0 :G}", System.DateTime.Now);    // 2012-3-27 11:43:34

 

            Console.WriteLine("{0 :M}", System.DateTime.Now);    // 3月27日

            Console.WriteLine("{0 :r}", System.DateTime.Now);// Tue, 27 Mar 2012 11:43:34 GMT

            Console.WriteLine("{0 :s}", System.DateTime.Now);    // 2012-03-27T11:43:34

            Console.WriteLine("{0 :u}", System.DateTime.Now);    // 2012-03-27 11:43:34Z

            Console.WriteLine("{0 :U}", System.DateTime.Now);    // 2012年3月27日 3:43:34

            Console.WriteLine("{0 :Y}", System.DateTime.Now);    // 2012年3月

 

            Console.WriteLine("{0 :dd}", System.DateTime.Now);   // 27

            Console.WriteLine("{0 :ddd}", System.DateTime.Now);  // 二

            Console.WriteLine("{0 :dddd}", System.DateTime.Now); // 星期二

 

            Console.WriteLine("{0 :f}", System.DateTime.Now);    // 2012年3月27日 11:46

            Console.WriteLine("{0 :ff}", System.DateTime.Now);   // 18

            Console.WriteLine("{0 :fff}", System.DateTime.Now);  // 187

            Console.WriteLine("{0 :ffff}", System.DateTime.Now); // 1875

            Console.WriteLine("{0 :fffff}", System.DateTime.Now); // 18750

 

            Console.WriteLine("{0 :gg}", System.DateTime.Now);   // 公元

            Console.WriteLine("{0 :ggg}", System.DateTime.Now);  // 公元

            Console.WriteLine("{0 :gggg}", System.DateTime.Now); // 公元

            Console.WriteLine("{0 :ggggg}", System.DateTime.Now);     // 公元

            Console.WriteLine("{0 :gggggg}", System.DateTime.Now);    // 公元

 

            Console.WriteLine("{0 :hh}", System.DateTime.Now);   // 11

            Console.WriteLine("{0 :HH}", System.DateTime.Now);   // 11

 

            Console.WriteLine("{0 :mm}", System.DateTime.Now);   // 50

            Console.WriteLine("{0 :MM}", System.DateTime.Now);   // 03

 

            Console.WriteLine("{0 :MMM}", System.DateTime.Now);  // 三月

            Console.WriteLine("{0 :MMMM}", System.DateTime.Now); // 三月

 

            Console.WriteLine("{0 :ss}", System.DateTime.Now);   // 43

            Console.WriteLine("{0 :tt}", System.DateTime.Now);   // 上午

 

            Console.WriteLine("{0 :yy}", System.DateTime.Now);   // 12

            Console.WriteLine("{0 :yyyy}", System.DateTime.Now); // 2012

            Console.WriteLine("{0 :zz}", System.DateTime.Now);   // +08

            Console.WriteLine("{0 :zzz}", System.DateTime.Now);  // +08:00

            Console.WriteLine("{0 :hh:mm:ss}", System.DateTime.Now);  // 11:43:34

            Console.WriteLine("{0 :dd/MM/yyyy}", System.DateTime.Now); // 27-03-2012


免責聲明!

本站轉載的文章為個人學習借鑒使用,本站對版權不負任何法律責任。如果侵犯了您的隱私權益,請聯系本站郵箱yoyou2525@163.com刪除。



 
粵ICP備18138465號   © 2018-2025 CODEPRJ.COM