Complete List of Data Type Formats for ToString in C# (Comma Separated)

Formatting GridView with DataFormatString
When displaying data in a GridView, if you want to display data with many decimal places but only show two decimal places, in Delphi, you can directly use DisplayFormat. In .NET, after searching through MSDN for a long time, I found that DataFormatString can achieve this function, but it didn't work. Finally, I found out that2.0 For safety reasons, you also need to set HtmlEncode = false to make DataFormatString effective.
Leave a mark so that you don't have to waste a lot of time next time you use it.
Moreover, DataFormatString = "{0:F}" is the default format, showing two decimal places. If you need to display a different number of decimal places, you can use DataFormatString = "{0:Fn}".

DataFormatString="{0:format string}"

In the DataFormatString, {0} represents the data itself, while the format string after the colon represents the format in which we want the data to be displayed;

Number, currency format:}}
After the specified format symbol, you can specify the number of decimal places to be displayed. For example, the original data is「1.56」，if the format is set to {0:N1} then the output is「1.5」。ItsCommon number formats are as follows:

Format string Input Result
"{0:C}" 12345.6789 $12,345.68
"{0:C}" -12345.6789 ($12,345.68)
"{0:D}" 12345 12345
"{0:D8") 12345 00012345
"{0:E}" 12345.6789 1234568E+004
"{0:E10") 12345.6789 1.2345678900E+004
"{0:F}" 12345.6789 12345.68
"{0:F0}" 12345.6789 12346
"{0:G}" 12345.6789 12345.6789
"{0:G7") 123456789 1.234568E8
"{0:N}" 12345.6789 12,345.68
"{0:N4") 123456789 123,456,789.0000
"Total: {0:C}" 12345.6789 Total: $12345.68

Common date-time formats:

Format Description Output format
d Compact date format MM/dd/yyyy
D Detailed date format dddd, MMMM dd, yyyy
f Complete format (long date + short time) dddd, MMMM dd, yyyy HH:mm
F
Complete date-time format
(long date + long time)
dddd, MMMM dd, yyyy HH:mm:ss
g General format (short date + short time) MM/dd/yyyy HH:mm
G General format (short date + long time) MM/dd/yyyy HH:mm:ss
m,M Month day format MMMM dd
s Moderate date-time format yyyy-MM-dd HH:mm:ss
t Compact time format HH:mm
T Detailed time format HH:mm:ss

C

Currency

2.5.ToString("C")

￥2.50

D

Decimal number

25.ToString("D5")

00025

E

Scientific

25000.ToString("E")

2.500000E+005

F

Fixed point

25.ToString("F2")

25.00

G

General

2.5.ToString("G")

2.5

N

Number

2500000.ToString("N")

2,500,000.00

X

Hexadecimal

255.ToString("X")

FF

The formatCode is an optional formatting code string. (For detailed information, please search for "Formatting String")
The format must be separated from other characters using "{" and "}". If brackets are needed within the format, use two consecutive brackets to represent one, that is: "{{" or "}}".

Common Format Examples:

(1); int i=12345;

this.textBox1.Text=i.ToString();

//Result 12345(this refers to the current object, or the 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};

this.textBox1.Text=s1 ;

//Result the value is 123

this.textBox2.Text=s2;

//Result 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"); //Result 12,345.68

this.textBox2.Text=i.ToString("n4); //Result 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; //Result the value is 12.6%

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

this.textBox1.Text=dt.ToString("yy.M.d");

//Result 03.5.25

this.textBox2.Text=dt.ToString("yyyy年M月");

//Result 2003Year5Month

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},{1,7};i,j);

//-7represents left alignment, occupying7Bit

this.textBox1.Text=s ;

//Result i:123 ,j: 123.45