C#: Formatting Price value string

问题

in C#,I have a double variable price with value 10215.24. I want to show the price with comma after some digits. My expected output is 10,215.24

回答1:

myPrice.ToString("N2");

depending on what you want, you may also wish to display the currency symbol:

myPrice.ToString("C2");

(The number after the C or N indicates how many decimals should be used). (C formats the number as a currency string, which includes a currency symbol)

To be completely politically correct, you can also specify the CultureInfo that should be used.

回答2:

I think this should do it:

String.Format("{0:C}", doubleVar);

If you don't want the currency symbol, then just do this:

String.Format("{0:N2}", doubleVar);

回答3:

As a side note, I would recommend looking into the Decimal type for currency. It avoids the rounding errors that plague floats, but unlike Integer, it can have digits after the decimal point.

回答4:

Look into format strings, specifically "C" or "N".

double price = 1234.25;
string FormattedPrice = price.ToString("N"); // 1,234.25

回答5:

This might help

    String.Format("{#,##0.00}", 1243.50); // Outputs “1,243.50″

    String.Format("{0:$#,##0.00;($#,##0.00);Zero}", 1243.50); // Outputs “$1,243.50″ 

    String.Format("{0:$#,##0.00;($#,##0.00);Zero}", -1243.50); // Outputs “($1,243.50)″ 

    String.Format("{0:$#,##0.00;($#,##0.00);Zero}", 0); // Outputs “Zero″

回答6:

The one you want is "N2".

Here is an example:

double dPrice = 29.999988887777666655554444333322221111; 
string sPrice = "£" + dPrice.ToString("N2");

You might even like this:

string sPrice = "";

if(dPrice < 1)
{
    sPrice = ((int)(dPrice * 100)) + "p";

} else
{
    sPrice = "£" + dPrice.ToString("N2");

}

which condenses nicely to this:

string sPrice = dPrice < 1 ? ((int)(dPrice * 100)).ToString("N0") + "p" : "£" + dPrice.ToString("N2");

Further reading at msdn.microsoft.com/en-us/library/fht0f5be.aspx for various other types of formatting

来源：https://stackoverflow.com/questions/1142994/c-formatting-price-value-string

标签

string-formatting