C#格式化数值结果表

左手的ㄟ右手 2021-12-17 05:31 223阅读 0赞

<table style="border-right:#339966 1pt outset;border-top:#339966 1pt outset;border-left:#339966 1pt outset;width:355.5pt;border-bottom:#339966 1pt outset;"> 
 <tbody> 
 <tr> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;background:#99cc00;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> 字符 </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;background:#99cc00;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> 说明 </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;background:#99cc00;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> 示例 </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;background:#99cc00;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> 输出 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> C </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> 货币 </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> string.Format("{0:C3}", 2) </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> ＄2.000 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> D </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> 十进制 </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> string.Format("{0:D3}", 2) </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> 002 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> E </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> 科学计数法 </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> 1.20E+001 </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> 1.20E+001 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> G </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> 常规 </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> string.Format("{0:G}", 2) </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> 2 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> N </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> 用分号隔开的数字 </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> string.Format("{0:N}", 250000) </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> 250,000.00 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> X </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> 十六进制 </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> string.Format("{0:X000}", 12) </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> C </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> &nbsp; </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> &nbsp; </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> string.Format("{0:000.000}", 12.2) </td> 
 <td style="border-right:#339966 1pt inset;border-top:#339966 1pt inset;border-left:#339966 1pt inset;border-bottom:#339966 1pt inset;"> 012.200 </td> 
 </tr> 
 </tbody> 
</table>

**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.

<table style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;width:390pt;border-bottom:#339966 1pt solid;"> 
 <tbody> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Sample </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Generates </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> String.Format("-&gt;{0,10}&lt;-", "Hello"); </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> -&gt; Hello&lt;- </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> String.Format("-&gt;{0,-10}&lt;-", "Hello"); </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> -&gt;Hello &lt;- </td> 
 </tr> 
 </tbody> 
</table>

**Numbers**

Basic number formatting specifiers:

<table style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;width:473.25pt;border-bottom:#339966 1pt solid;"> 
 <tbody> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Specifier </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Type </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Format </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Output (Passed Double 1.42) </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Output (Passed Int -12400) </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> c </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Currency </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:c} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> ＄1.42 </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> -＄12,400 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> d </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Decimal (Whole number) </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:d} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> System. FormatException </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> -12400 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> e </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Scientific </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:e} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 1.420000e+000 </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> -1.240000e+004 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> f </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Fixed point </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:f} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 1.42 </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> -12400.00 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> g </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> General </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:g} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 1.42 </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> -12400 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> n </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Number with commas for thousands </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:n} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 1.42 </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> -12,400 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> r </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Round trippable </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:r} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 1.42 </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> System. FormatException </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> x </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Hexadecimal </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:x4} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> System. FormatException </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> cf90 </td> 
 </tr> 
 </tbody> 
</table>

Custom number formatting:

<table style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;width:510.75pt;border-bottom:#339966 1pt solid;"> 
 <tbody> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Specifier </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Type </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Example </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Output (Passed Double 1500.42) </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Note </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 0 </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Zero placeholder </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:00.0000} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 1500.4200 </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Pads with zeroes. </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> # </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Digit placeholder </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:(#).##} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> (1500).42 </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> &nbsp; </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> . </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Decimal point </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:0.0} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 1500.4 </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> &nbsp; </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> , </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Thousand separator </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:0,0} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 1,500 </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Must be between two zeroes. </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> ,. </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Number scaling </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:0,.} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 2 </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Comma adjacent to Period scales by 1000. </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> % </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Percent </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:0%} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 150042% </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Multiplies by 100, adds % sign. </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> e </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Exponent placeholder </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:00e+0} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 15e+2 </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Many exponent formats available. </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> ; </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Group separator </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> see below </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> &nbsp; </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> &nbsp; </td> 
 </tr> 
 </tbody> 
</table>

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.

<table style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;width:506.25pt;border-bottom:#339966 1pt solid;"> 
 <tbody> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Specifier </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Type </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Example (Passed System.DateTime.Now) </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> d </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Short date </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 10/12/2002 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> D </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Long date </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> December 10, 2002 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> t </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Short time </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 10:11 PM </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> T </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Long time </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 10:11:29 PM </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> f </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Full date &amp; time </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> December 10, 2002 10:11 PM </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> F </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Full date &amp; time (long) </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> December 10, 2002 10:11:29 PM </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> g </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Default date &amp; time </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 10/12/2002 10:11 PM </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> G </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Default date &amp; time (long) </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 10/12/2002 10:11:29 PM </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> M </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Month day pattern </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> December 10 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> r </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> RFC1123 date string </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Tue, 10 Dec 2002 22:11:29 GMT </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> s </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Sortable date string </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 2002-12-10T22:11:29 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> u </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Universal sortable, local time </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 2002-12-10 22:13:50Z </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> U </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Universal sortable, GMT </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> December 11, 2002 3:13:50 AM </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Y </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Year month pattern </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> December, 2002 </td> 
 </tr> 
 </tbody> 
</table>

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

**Custom date formatting:**

<table style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 
 <tbody> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Specifier </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Type </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Example </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;background:#99cc00;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Example Output </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> dd </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Day </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:dd} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 10 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> ddd </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Day name </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:ddd} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Tue </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> dddd </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Full day name </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:dddd} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Tuesday </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> f, ff, ... </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Second fractions </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:fff} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 932 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> gg, ... </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Era </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:gg} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> A.D. </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> hh </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 2 digit hour </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:hh} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 10 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> HH </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 2 digit hour, 24hr format </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:HH} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 22 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> mm </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Minute 00-59 </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:mm} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 38 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> MM </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Month 01-12 </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:MM} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 12 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> MMM </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Month abbreviation </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:MMM} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Dec </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> MMMM </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Full month name </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:MMMM} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> December </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> ss </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Seconds 00-59 </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:ss} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 46 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> tt </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> AM or PM </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:tt} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> PM </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> yy </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Year, 2 digits </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:yy} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 02 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> yyyy </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Year </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:yyyy} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 2002 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> zz </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Timezone offset, 2 digits </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:zz} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> -05 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> zzz </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Full timezone offset </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:zzz} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> -05:00 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> : </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Separator </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:hh:mm:ss} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 10:43:20 </td> 
 </tr> 
 <tr> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> / </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> Separator </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> {0:dd/MM/yyyy} </td> 
 <td style="border-right:#339966 1pt solid;border-top:#339966 1pt solid;border-left:#339966 1pt solid;border-bottom:#339966 1pt solid;"> 10/12/2002 </td> 
 </tr> 
 </tbody> 
</table>

**Enumerations**

**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%

转载于:https://www.cnblogs.com/hdjjun/archive/2008/06/17/1223796.html