stringstr1 = string.Format ("{0: N1}", 56789); // resultado: 56,789.0
stringstr2 = string.Format ("{0: N2}", 56789); // resultado: 56,789.00
stringstr3 = string.Format ("{0: N3}", 56789); // resultado: 56,789,000
stringstr8 = string.Format ("{0: F1}", 56789); // resultado: 56789.0
stringstr9 = string.Format ("{0: F2}", 56789); // resultado: 56789.00
stringstr11 = (56789 / 100.0) .ToString ("#. ##"); // resultado: 567.89
stringstr12 = (56789/100) .ToString ("#. ##"); // resultado: 567
C 或 c
货币
Console.Write ("{0: C}", 2.5); //$2.50
Console.Write ("{0: C}", -2.5); //($2.50)
D o d
número decimal
Console.Write ("{0: D5}", 25); // 00025
E o e consola
científica.Write
("{0: E}", 250000); //2.500000E+005
F O f de
punto fijo
Console.Write ("{0: F2}", 25); //25.00
Console.Write ("{0: F0}", 25); // 25
G o g
normal
Console.Write ("{ 0: G} ", 2.5); //2.5
N o n
número
Console.Write (" {0: N} ", 2500000); //2,500,000.00
X o x
hexadecimal
Console.Write (" {0: X } ", 250); // FA
Console.Write (" {0: X} ", 0xffff); // FFFF
C
|
moneda
|
2.5.ToString ("C")
|
¥ 2,50
|
re
|
Decimal
|
25.ToString ("D5")
|
00025
|
mi
|
Científico
|
25000.ToString ("E")
|
2.500000E + 005
|
F
|
punto fijo
|
25.ToString ("F2")
|
25.00
|
GRAMO
|
convencional
|
2.5.ToString("G")
|
2.5
|
N
|
数字
|
2500000.ToString("N")
|
2,500,000.00
|
X
|
十六进制
|
255.ToString("X")
|
FF
|
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);
this.textBox1.Text=s1 ;
//结果 the value is 123
this.textBox2.Text=s2;
//结果 the value is 123.450
(3)double i=12345.6789;
this.textBox1.Text=i.ToString("f2"); //结果 12345.68
this.textBox2.Text=i.ToString("f6");
//结果 12345.678900
(4)double i=12345.6789;
this.textBox1.Text=i.ToString("n"); //结果 12,345.68
this.textBox2.Text=i.ToString(“n4”); //结果 12,345.6789
(5)double i=0.126;
string s=string.Format("the value is {0:p}",i);
this.textBox1.Text=i.ToString("p"); //结果 12.6%
this.textBox2.Text=s; //结果 the value is 12.6%
(6) DateTime dt =new DateTime(2003,5,25);
this.textBox1.Text=dt.ToString("yy.M.d");
//结果 03.5.25
this.textBox2.Text=dt.ToString(“yyyy年M月”);
//结果 2003年5月
Convert.ToDateTime("2005/12/22 22:22:22").ToString("yyyy/MM/dd HH:mm:ss")
"2005/12/22 22:22:22"
(7) int i=123;
double j=123.45;
string s=string.Format("i:{0,-7},j:{1,7}",i,j);
//-7表示左对齐,占7位
this.textBox1.Text=s ;
//结果i:123 ,j: 123.45