C#格式化数值结果表

字符

说明

示例

输出

C 货币 string.Format("{0:C3}", 2) $2.000
D 十进制 string.Format("{0:D3}", 2) 002
E 科学计数法 1.20E+001 1.20E+001
G 常规 string.Format("{0:G}", 2) 2
N 用分号隔开的数字 string.Format("{0:N}", 250000) 250,000.00
X 十六进制 string.Format("{0:X000}", 12) C
    string.Format("{0:000.000}", 12.2) 012.200

Strings

There really isn't any formatting within a strong, beyond it's 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 Type Example Output (Passed Double 1500.42) Note
0 Zero placeholder {0:00.0000} 1500.4200 Pads with zeroes.
# Digit placeholder {0:(#).##} (1500).42  
. Decimal point {0:0.0} 1500.4  
, Thousand separator {0:0,0} 1,500 Must be between two zeroes.
,. Number scaling {0:0,.} 2 Comma adjacent to Period scales by 1000.
% Percent {0:0%} 150042% Multiplies by 100, adds % sign.
e Exponent placeholder {0:00e+0} 15e+2 Many exponent formats available.
; Group separator see 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:

Dates

Note that date formatting is especially dependant on the system's regional settings; the example strings here are from my local locale.

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

The 'U' specifier seems broken; that string certainly isn't sortable.

Custom date formatting:

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

Enumerations

Specifier Type
g Default (Flag names if available, otherwise decimal)
f Flags always
d Integer always
x Eight digit hex.

Some Useful Examples

String.Format("{0:$#,##0.00;($#,##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.

String.Format("{0:(###) ###-####}", 18005551212);

This will output "(800) 555-1212".

变量.ToString()

字符型转换 转为字符串 
12345.ToString("n"); //生成 12,345.00 
12345.ToString("C"); //生成 ¥12,345.00 
12345.ToString("e"); //生成 1.234500e+004 
12345.ToString("f4"); //生成 12345.0000 
12345.ToString("x"); //生成 3039 (16进制) 
12345.ToString("p"); //生成 1,234,500.00%

String.Format格式说明(转)的更多相关文章

  1. String.Format格式说明——复制于DotNet笔记

    String.Format格式说明   C#格式化数值结果表 字符 说明 示例 输出 C 货币 string.Format("{0:C3}", 2) $2.000 D 十进制 st ...

  2. JSON详解+ C# String.Format格式说明+ C# ListView用法详解 很完整

    JSON详解 C# String.Format格式说明 C# ListView用法详解 很完整

  3. string类(三、string.format格式字符串)

    参考连接: http://www.cnblogs.com/luluping/archive/2009/04/30/1446665.html http://blog.csdn.net/samsone/a ...

  4. String.Format 格式说明

    C#格式化数值结果表 字符 说明 示例 输出 C 货币 string.Format("{0:C3}", 2) $2.000 D 十进制 string.Format("{0 ...

  5. C# String.Format格式说明

    C#格式化数值结果表 字符 说明 示例 输出 C 货币 string.Format("{0:C3}", 2) $2.000 D 十进制 string.Format("{0 ...

  6. String.Format格式说明

    原文地址:http://www.cnblogs.com/tuyile006/archive/2006/07/13/449884.aspx C#格式化数值结果表 字符 说明 示例 输出 C 货币 str ...

  7. C# string.Format()格式

    using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Cons ...

  8. 【2017-04-19】C#中String.Format格式使用

    例子: int a =9; string s= a.ToString("000"); Console.Write(s); 打印出来就是009 C#格式化数值结果表 字符 说明 示例 ...

  9. JAVA字符串格式化-String.format()的使用(转)

    常规类型的格式化 String类的format()方法用于创建格式化的字符串以及连接多个字符串对象.熟悉C语言的同学应该记得C语言的sprintf()方法,两者有类似之处.format()方法有两种重 ...

随机推荐

  1. jquery火焰等效果导航菜单

    jQuery-火焰灯效果导航菜单 by zhangxinxu from http://www.zhangxinxu.com 本文地址:http://www.zhangxinxu.com/wordpre ...

  2. Android 系统属性

    /************************************************************************ * Android 系统属性 * 说明: * 由于需 ...

  3. 【Python】类和对象、继承、使用文件、存储、异常、标准库(不懂)

    当你调用这个对象的方法MyObject.method(arg1, arg2)的时候,这会由Python自动转为MyClass.method(MyObject, arg1, arg2)——这就是self ...

  4. PHP截取中文字符串

    这里的输出的长度是6,那么一个汉字的字符长度就是3咯,可是老师演示的一个字符的长度却是2,百思不得其解. 查了一下资料发现,这个问题的答案与系统所采用的字符编码方式有关: 1. utf-8 如果系统采 ...

  5. Team Foundation Server 2010下载安装配置方法

    一.Team Foundation Server 2010下载: ed2k://|file|cn_visual_studio_team_foundation_server_2010_x86_x64_d ...

  6. ArcEngine下投影坐标和经纬度坐标的相互转换

    jojojojo2002 原文 ArcEngine下投影坐标和经纬度坐标的相互转换 投影转经纬度 private IPoint PRJtoGCS( double x, double y) { IPoi ...

  7. [转]SqlPlus安装配置

    本文转载自http://blog.csdn.net/wuxiaoyan_home/article/details/4826440 一.下载oracle 10g sqlplus软件 http://www ...

  8. 【Java多线程】互斥

    Java多线程学习2——互斥 一.前言 在上一节 (http://www.cnblogs.com/lzhen/p/3917966.html) 中,通过实现Runnable接口,可以实现多线程中的资源的 ...

  9. leetcode刷题总结一

    大四狗找工作,要刷题了,leetcode上面题目比较适合面试算法类题目,也不纯粹为了蒙题,锻炼一下面试类型的思维 Single Number: 有N个数,其中只有一个数出现了一次,其他都是两次,找出那 ...

  10. 前端面试题(JS篇)

    原题地址:http://handyxuefeng.blog.163.com/blog/static/454521722013111714040259/ 好吧,最近打算换工作,所以关注比较多的是面试题, ...