C#中ToString格式大全(转)

刺骨的言语ヽ痛彻心扉 2022-06-15 00:55 181阅读 0赞

stringstr1 =string.Format("\{0:N1\}",56789);               //result: 56,789.0  
stringstr2 =string.Format("\{0:N2\}",56789);               //result: 56,789.00  
stringstr3 =string.Format("\{0:N3\}",56789);               //result: 56,789.000  
stringstr8 =string.Format("\{0:F1\}",56789);               //result: 56789.0  
stringstr9 =string.Format("\{0:F2\}",56789);               //result: 56789.00  
stringstr11 =(56789 / 100.0).ToString("\#.\#\#");           //result: 567.89  
stringstr12 =(56789 / 100).ToString("\#.\#\#");             //result: 567

C 或 c  
货币  
Console.Write("\{0:C\}", 2.5); //$2.50  
Console.Write("\{0:C\}", -2.5); //($2.50)

D 或 d  
十进制数  
Console.Write("\{0:D5\}", 25); //00025  
  
E 或 e  
科学型  
Console.Write("\{0:E\}", 250000); //2.500000E+005  
  
F 或 f  
固定点  
Console.Write("\{0:F2\}", 25); //25.00  
Console.Write("\{0:F0\}", 25); //25  
  
G 或 g  
常规  
Console.Write("\{0:G\}", 2.5); //2.5  
  
N 或 n  
数字  
Console.Write("\{0:N\}", 2500000); //2,500,000.00  
  
X 或 x  
十六进制  
Console.Write("\{0:X\}", 250); //FA  
Console.Write("\{0:X\}", 0xffff); //FFFF

<table style="margin:0px; padding:0px; border:1px solid silver; border-collapse:collapse; word-break:break-word; color:rgb(0,0,0); font-family:Verdana,Arial,Helvetica,sans-serif; font-size:13px; line-height:19.5px"> 
 <tbody style="margin:0px; padding:0px"> 
 <tr style="margin:0px; padding:0px"> 
 <td align="center" style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; &nbsp; &nbsp; C </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 货币 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 2.5.ToString("C") </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; ￥2.50 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td align="center" style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; D </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 十进制数 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 25.ToString("D5") </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 00025 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td align="center" style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; E </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 科学型 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 25000.ToString("E") </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 2.500000E+005 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td align="center" style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; F </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 固定点 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 25.ToString("F2") </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 25.00 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td align="center" style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; G </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 常规 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 2.5.ToString("G") </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 2.5 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td align="center" style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; N </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 数字 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 2500000.ToString("N") </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 2,500,000.00 </td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td align="center" style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; X </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 十六进制 </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; 255.ToString("X") </td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp; FF </td> 
 </tr> 
 </tbody> 
</table>

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

（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);