Home Backend Development C#.Net Tutorial Summary of ToString data type format in C# (thousand separator)

Summary of ToString data type format in C# (thousand separator)

Mar 22, 2017 am 11:49 AM

这篇文章主要介绍了C#中ToString数据类型格式大全 千分符,需要的朋友可以参考下

用DataFormatString格式化GridView
在 GridView里面显示数据,要显示的数据有好多位小数,就想让它只显示两位小数,在delphi里,直接用DisplayFormat就行了, 在.net中,查了半天msdn,发现使用DataFormatString是可以实现这个功能的,但是怎么设置就不起作用,最后发现,由于2.0出于安 全性的考虑,还要同时设置HtmlEncode = false,才能够使DataFormatString生效.
留个记号,下次用的时候,就不用浪费N多时间了.
还有还有,DataFormatString = "{0:F}",是默认格式,显示两位小数,如果需要显示的小数位数为其他值,DataFormatString = "{0:Fn}"即可.

DataFormatString="{0:格式字符串}"
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在DataFormatString 中的 {0} 表示数据本身,而在冒号后面的格式字符串代表所们希望数据显示的格式;

数字、货币格式:
在指定的格式符号后可以指定小数所要显示的位数。例如原来的数据为「1.56」,若格式设定为 {0:N1},则输出为「1.5」。其常用的数值格式如下表所示:

格式字符串 输入 结果

"{0:C}" 12345.6789 $12,345.68
"{0:C}" -12345.6789 ($12,345.68)
"{0:D}" 12345 12345
"{0:D8}" 12345 00012345
"{0:E}" 12345.6789 1234568E+004
"{0:E10}" 12345.6789 1.2345678900E+004
"{0:F}" 12345.6789 12345.68
"{0:F0}" 12345.6789 12346
"{0:G}" 12345.6789 12345.6789
"{0:G7}" 123456789 1.234568E8
"{0:N}" 12345.6789 12,345.68
"{0:N4}" 123456789 123,456,789.0000
"Total: {0:C}" 12345.6789 Total: $12345.68
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常用的日期时间格式:

格式 说明 输出格式
d 精简日期格式 MM/dd/yyyy
D 详细日期格式 dddd, MMMM dd, yyyy
f 完整格式 (long date + short time) dddd, MMMM dd, yyyy HH:mm
F
完整日期时间格式
(long date + long time)
dddd, MMMM dd, yyyy HH:mm:ss
g 一般格式 (short date + short time) MM/dd/yyyy HH:mm
G 一般格式 (short date + long time) MM/dd/yyyy HH:mm:ss
m,M 月日格式 MMMM dd
s 适中日期时间格式 yyyy-MM-dd HH:mm:ss
t 精简时间格式 HH:mm
T 详细时间格式 HH:mm:ss

C

货币

2.5.ToString("C")

¥2.50

D

十进制数

25.ToString("D5")

00025

E

科学型

25000.ToString("E")

2.500000E+005

F

固定点

25.ToString("F2")

25.00

G

常规

2.5.ToString("G")

2.5

N

数字

2500000.ToString("N")

2,500,000.00

X

十六进制

255.ToString("X")

FF

formatCode 是可选的格式化代码字符串。(详细内容请搜索格式化字符串”查看)
必须用“{”和“}”将格式与其他字符分开。如果恰好在格式中也要使用大括号,可以用连续的两个大括号表示一个大括号,即: “{{”或者“}}”。

常用格式举例:

(1) int i=12345;

this.textBox1.Text=i.ToString();
//结果 12345(this指当前对象,或叫当前类的实例)
this.textBox2.Text=i.ToString("d8");
//结果 00012345
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(2) int i=123;

double j=123.45;
string s1=string.Format("the value is {0,7:d}",i);
string s2=string.Format("the value is {0,7:f3}",j);
this.textBox1.Text=s1 ;
//结果 the value is 123
this.textBox2.Text=s2;
//结果 the value is 123.450
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(3)double i=12345.6789;

this.textBox1.Text=i.ToString("f2"); //结果 12345.68
this.textBox2.Text=i.ToString("f6");
//结果 12345.678900
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(4)double i=12345.6789;

this.textBox1.Text=i.ToString("n"); //结果 12,345.68
this.textBox2.Text=i.ToString(“n4”); //结果 12,345.6789
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(5)double i=0.126;

string s=string.Format("the value is {0:p}",i);
this.textBox1.Text=i.ToString("p"); //结果 12.6%
this.textBox2.Text=s; //结果 the value is 12.6%
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(6) DateTime dt =new DateTime(2003,5,25);

this.textBox1.Text=dt.ToString("yy.M.d");
//结果 03.5.25
this.textBox2.Text=dt.ToString(“yyyy年M月”);
//结果 2003年5月
Convert.ToDateTime("2005/12/22 22:22:22").ToString("yyyy/MM/dd HH:mm:ss")"2005/12/22 22:22:22"
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(7) int i=123;

double j=123.45;
string s=string.Format("i:{0,-7},j:{1,7}",i,j);
//-7表示左对齐,占7位
this.textBox1.Text=s ;
//结果i:123 ,j: 123.45
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