int a = 12345678;
//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;

//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(jìn)制--12345678
Label2.Text = b.ToString("d");//十進(jìn)制--相同的類型，轉(zhuǎn)換報錯
Label1.Text = string.Format("{0:e}",a);//指數(shù)--1.234568e+007
Label2.Text = b.ToString("e");//指數(shù)--1.234125e+003
Label1.Text = string.Format("{0:f}",a);//定點數(shù)--12345678.00
Label2.Text = b.ToString("f");//定點數(shù)--1234.13
Label1.Text = string.Format("{0:n}",a);//數(shù)值--12,345,678.00
Label2.Text = b.ToString("n");//數(shù)值--1,234.13
Label1.Text = string.Format("{0:x}",a);//十六進(jìn)制--bc614e
Label2.Text = b.ToString("x");//16--帶有小數(shù)不能轉(zhuǎn)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(zhuǎn)來轉(zhuǎn)去不損失精度--整數(shù)不允許用，報錯
Label2.Text = b.ToString("r");//轉(zhuǎn)來轉(zhuǎn)去不損失精度--1234.12543

double b = 4321.12543;
int a = 1234;
自定義模式輸出：

//"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：小數(shù)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;

//","描述：數(shù)字分組，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：格式為百分?jǐn)?shù)
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：顯示單引號內(nèi)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，也用于轉(zhuǎn)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"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(zhuǎn)載于:https://blog.51cto.com/gnhao/1113052

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