C#數字格式化方法全面解析

C#數字格式化輸出：

int a = 12345678;

C#數字格式化之格式為sring輸出

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;

C#數字格式化之格式為特殊的string樣式輸出

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);//十進位--12345678

Label2.Text = b.ToString("d");//十進位--相同的類型，轉換報錯

Label1.Text = string.Format("{0:e}",a);//指數--1.234568e+007

Label2.Text = b.ToString("e");//指數--1.234125e+003

Label1.Text = string.Format("{0:f}",a);//定點數--12345678.00

Label2.Text = b.ToString("f");//定點數--1234.13

Label1.Text = string.Format("{0:n}",a);//數值--12,345,678.00

Label2.Text = b.ToString("n");//數值--1,234.13

Label1.Text = string.Format("{0:x}",a);//十六進位--bc614e

Label2.Text = b.ToString("x");//16--帶有小數不能轉換，出錯

Label1.Text = string.Format("{0:g}",a);//通用為最緊湊--12345678

Label2.Text = b.ToString("g");//通用為最緊湊--1234.12543

Label1.Text = string.Format("{0:r}",a);//轉來轉去不損失精度--整數不允許用，報錯

Label2.Text = b.ToString("r");//轉來轉去不損失精度--1234.12543

double b = 4321.12543;

int a = 1234;

C#數字格式化之自訂模式輸出：

C#數字格式化之"0"描述：預留位置，如果可能，填充位

Label1.Text = string.Format("{0:000000}",a);// 001234

Label2.Text = string.Format("{0:000000}",b);// 004321

C#數字格式化之"#"描述：預留位置，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

C#數字格式化之"."描述：小數點

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;

C#數字格式化之","描述：數字分組，也用於增倍器

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

C#數字格式化之"%"描述：格式為百分數

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%

C#數字格式化之"abc"描述：顯示單引號內的文本

Label1.Text = string.Format("{0:'文本'0}",a);// 文本12345678

Label2.Text = string.Format("{0:文本0}",b);// 文本87654321

C#數字格式化之"\"描述：後跟1要列印字的字元，也用於轉移符\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

C#數字格式化之"@"描述：後跟要列印字的字元,

Label1.Text = string.Format(@"""你好！"""); // "你好！"要列印"則需要輸入兩對才可以

Label2.Text = string.Format(@"\c\books\new\we.asp");//\c\books\new\we.asp

轉自：http://blog.csdn.net/ggw128/archive/2010/06/11/5663663.aspx