ACE Analytics Custom Numeric Formats
    • 19 Apr 2023
    • 4 Minutes to read
    • Contributors
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    ACE Analytics Custom Numeric Formats

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    Article summary

    In addition to the standard formats listed above, developers can enter custom numeric formats by typing them in directly.

    For example, one of the standard date formats is "###,###,##0.00". Developers can directly enter other combinations of valid formatting characters, such as "$#,##0" to obtain the desired format. Here are the valid numeric formatting characters:

     

    Chars

    Description

    None

    Displays the number with no formatting.

    0

    Digit placeholder. Displays a digit or a zero. If the expression has a digit in the position where the zero appears in the format string, display it; otherwise, displays a zero in that position.

    If the number has fewer digits than there are zeros (on either side of the decimal) in the format expression, displays leading or trailing zeros. If the number has more digits to the right of the decimal separator than there are zeros to the right of the decimal separator in the format expression, rounds the number to as many decimal places as there are zeros. If the number has more digits to the left of the decimal separator than there are zeros to the left of the decimal separator in the format expression, displays the extra digits without modification.

    #

    Digit placeholder. Displays a digit or nothing. If the expression has a digit in the position where the # character appears in the format string, displays it; otherwise, displays nothing in that position.

    This symbol works like the 0 digit placeholder, except that leading and trailing zeros aren't displayed if the number has fewer digits than there are # characters on either side of the decimal separator in the format expression.

    .

    Decimal placeholder. The decimal placeholder determines how many digits are displayed to the left and right of the decimal separator. If the format expression contains only # characters to the left of this symbol; numbers smaller than 1 begin with a decimal separator. To display a leading zero displayed with fractional numbers, use zero as the first digit placeholder to the left of the decimal separator. In some locales, a comma is used as the decimal separator. The actual character used as a decimal placeholder in the formatted output depends on the number format recognized by your system. Thus, you should use the period as the decimal placeholder in your formats even if you are in a locale that uses a comma as a decimal placeholder. The formatted string will appear in the format correct for the locale.

    %

    Percent placeholder. Multiplies the expression by 100. The percent character (%) is inserted in the position where it appears in the format string.

    ,

    Thousand separator. The thousand separator separates thousands from hundreds within a number that has four or more places to the left of the decimal separator. Standard use of the thousand separator is specified if the format contains a thousand separator surrounded by digit placeholders (0 or #). A thousand separator immediately to the left of the decimal separator (whether or not a decimal is specified) or as the rightmost character in the string means "scale the number by dividing it by 1,000, rounding as needed."

    For example, you can use the format string "##0,." to represent 100 million as 100,000. Numbers smaller than 1,000 but greater or equal to 500 are displayed as 1, and numbers smaller than 500 are displayed as 0. Two adjacent thousand separators in this position scale by a factor of 1 million, and an additional factor of 1,000 for each additional separator.

    Multiple separators in any position other than immediately to the left of the decimal separator or the rightmost position in the string are treated simply as specifying the use of a thousand separator. In some locales, a period is used as a thousand separator. The actual character used as the thousand separator in the formatted output depends on the Number Format recognized by your system. Thus, you should use the comma as the thousand separator in your formats even if you are in a locale that uses a period as a thousand separator. The formatted string will appear in the format correct for the locale.

    E- E+ e- e+

    Scientific format. If the format expression contains at least one digit placeholder (0 or #) to the left of E-E+,e-, or e+, the number is displayed in scientific format and E or e is inserted between the number and its exponent. The number of digit placeholders to the left determines the number of digits in the exponent. Use E-or e- to place a minus sign next to negative exponents. Use E+ or e+ to place a minus sign next to negative exponents and a plus sign next to positive exponents. You must also include digit placeholders to the right of this symbol to get correct formatting.

    - + $ ( )

    Literal characters. These characters are displayed exactly as typed in the format string. To display a character other than one of those listed, precede it with a backslash (\) or enclose it in double quotation marks (" ").

    \

    Displays the next character in the format string. To display a character that has special meaning as a literal character, precede it with a backslash (\). The backslash itself isn't displayed. Using a backslash is the same as enclosing the next character in double quotation marks. To display a backslash, use two backslashes (\\).

    Examples of characters that can't be displayed as literal characters are the date-formatting and time-formatting characters (acdhmnpqstwy/, and :), the numeric-formatting characters (#0%Ee, comma, and period), and the string-formatting characters (@&<>, and !).

    Visit the MSDN Library User Defined Numeric Formats page for more information.

    Positive and Negative Number Formatting

    To construct a custom format for currency or numbers that treats positive and negative numbers differently, use a semi-colon and a space in the Format attribute to delineate two formats: 

    For example, the Format value shown above will show positive numbers with a comma as a thousands separator. It will show negative numbers in the same way but also enclose them in parenthesis. Note the semi-colon and space which separate the positive and negative formats.

    You can also use the Conditional Class element, beneath any Label element that displays numeric data, to display negative numbers in a different color than positive numbers.


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