ToString () format and usage Encyclopedia _string

C

Currency

2.5.ToString ("C")

￥2.50

D

Decimal number

25.ToString ("D5")

00025

E

Scientific type

25000.ToString ("E")

2.500000E+005

F

Fixed point

25.ToString ("F2")

25.00

G

Conventional

2.5.ToString ("G")

2.5

N

Digital

2500000.ToString ("N")

2,500,000.00

X

Hexadecimal

255.ToString ("X")

Ff

Formatcode is an optional format code string. (For more information, search for "format string" view)

Format must be separated from other characters with "{" and "}". If you want to also use curly braces in a format, you can use two consecutive curly braces to represent a brace, that is, "{{" or "}}".

Examples of commonly used formats:

(1) int i=12345;

This.textbox1.text=i.tostring ();

Result 12345 (this refers to the current object, or an instance of the current class)

This.textbox2.text=i.tostring ("D8");

Result 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;

Results The value is 123

THIS.TEXTBOX2.TEXT=S2;

Results The value is 123.450

(3) Double i=12345.6789;

This.textbox1.text=i.tostring ("F2"); Result 12345.68

This.textbox2.text=i.tostring ("F6");

Result 12345.678900

(4) Double i=12345.6789;

This.textbox1.text=i.tostring ("n"); Results 12,345.68

This.textbox2.text=i.tostring ("N4"); Results 12,345.6789

(5) Double i=0.126;

String s=string. Format ("The value is {0:p}", i);

This.textbox1.text=i.tostring ("P"); Result 12.6%

This.textbox2.text=s; Results The value is 12.6%

(6) DateTime dt =new datetime (2003,5,25);

This.textbox1.text=dt. ToString ("yy"). M.D ");

Results 03.5.25

This.textbox2.text=dt. ToString ("yyyy years M");

Results May 2003

(7) int i=123;

Double j=123.45;

String s=string. Format ("i:{0,-7},j:{1,7}", i,j);

-7 represents left-aligned, 7-bit

This.textbox1.text=s;

Results i:123, j:123.45