C#数字格式化输出

int a = 12345678; 
//格式为sring输出 
Label1.Text = string.Format("asdfadsf{0}adsfasdf",a); 
Label2.Text = "asdfadsf"+a.ToString()+"adsfasdf"; 
Label1.Text = string.Format("asdfadsf{0:C}adsfasdf",a);//asdfadsf￥1,234.00adsfasdf 
Label2.Text = "asdfadsf"+a.ToString("C")+"adsfasdf";//asdfadsf￥1,234.00adsfasdf 
double b = 1234.12543; 
int a = 12345678; 

//格式为特殊的string样式输出 
Label1.Text = string.Format("asdfadsf{0:C}adsfasdf",b);//asdfadsf￥1,234.13adsfasdf 
Label2.Text = "asdfadsf"+b.ToString("C")+"adsfasdf";//asdfadsf￥1,234.13adsfasdf 
Label1.Text = string.Format("{0:C3}",b);//￥1,234.125 
Label2.Text = b.ToString("C3");//￥1,234.125 
Label1.Text = string.Format("{0:d}",a);//十进制--12345678 
Label2.Text = b.ToString("d");//十进制--相同的类型，转换报错 
Label1.Text = string.Format("{0:e}",a);//指数--1.234568e+007 
Label2.Text = b.ToString("e");//指数--1.234125e+003 
Label1.Text = string.Format("{0:f}",a);//定点数--12345678.00 
Label2.Text = b.ToString("f");//定点数--1234.13 
Label1.Text = string.Format("{0:n}",a);//数值--12,345,678.00 
Label2.Text = b.ToString("n");//数值--1,234.13 
Label1.Text = string.Format("{0:x}",a);//十六进制--bc614e 
Label2.Text = b.ToString("x");//16--带有小数不能转换，出错 
Label1.Text = string.Format("{0:g}",a);//通用为最紧凑--12345678 
Label2.Text = b.ToString("g");//通用为最紧凑--1234.12543 
Label1.Text = string.Format("{0:r}",a);//转来转去不损失精度--整数不允许用，报错 
Label2.Text = b.ToString("r");//转来转去不损失精度--1234.12543 

double b = 4321.12543; 
int a = 1234; 
自定义模式输出： 

//"0"描述：占位符，如果可能，填充位 
Label1.Text = string.Format("{0:000000}",a);// 001234 
Label2.Text = string.Format("{0:000000}",b);// 004321 

//"#"描述：占位符，如果可能，填充位 
Label1.Text = string.Format("{0:#######}",a);// 1234 
Label2.Text = string.Format("{0:#######}",b);// 4321 
Label1.Text = string.Format("{0:#0####}",a);// 01234 
Label2.Text = string.Format("{0:0#0000}",b);// 004321 

//"."描述：小数点 
Label1.Text = string.Format("{0:000.000}",a);//1234.000 
Label2.Text = string.Format("{0:000.000}",b);//4321.125 
double b = 87654321.12543; 
int a = 12345678; 

//","描述：数字分组，也用于增倍器 
Label1.Text = string.Format("{0:0,00}",a);// 12,345,678 
Label2.Text = string.Format("{0:0,00}",b);// 87,654,32 
Label1.Text = string.Format("{0:0,}",a);// 12346 
Label2.Text = string.Format("{0:0,}",b);// 87654 
Label1.Text = string.Format("{0:0,,}",a);// 12 
Label2.Text = string.Format("{0:0,,}",b);// 88 
Label1.Text = string.Format("{0:0,,,}",a);// 0 
Label2.Text = string.Format("{0:0,,,}",b);// 0 

//"%"描述：格式为百分数 
Label1.Text = string.Format("{0:0%}",a);// 1234567800% 
Label2.Text = string.Format("{0:#%}",b);// 8765432113% 
Label1.Text = string.Format("{0:0.00%}",a);// 1234567800.00% 
Label2.Text = string.Format("{0:#.00%}",b);// 8765432112.54% 

//"abc"描述：显示单引号内的文本 
Label1.Text = string.Format("{0:'文本'0}",a);// 文本12345678 
Label2.Text = string.Format("{0:文本0}",b);// 文本87654321 

//"\"描述：后跟1要打印字的字符，也用于转移符\n等 
Label1.Text = string.Format("\"你好！\"");// "你好！" 
Label2.Text = string.Format("[url=file://\\c\\books\\new\\we.asp]\\c\\books\\new\\we.asp");//\c\books\new\we.asp 

//"@"描述：后跟要打印字的字符, 
Label1.Text = string.Format(@"""你好！"""); // "你好！"要打印"则需要输入两对才可以 
Label2.Text = string.Format(@"\c\books\new\we.asp");//\c\books\new\we.asp