Numbers and dates

StellarAdmin displays a number property with NumberDisplay, and a DateOnly, DateTime, DateTimeOffset or TimeOnly property with DateDisplay.

NumberDisplay displays every digit with the same width, so the numbers in a column line up. In the grid, numbers are aligned to the right.

Without a format, a number is displayed as it is, a date as 14 Oct 2026, a time as 09:30, and a date and time as 14 Oct 2026, 09:30.

Formatting a number or a dateCopy Anchor Link

To format a number or a date, set Format to a .NET format string, such as "C" or "N2" for a number, or "d MMM yyyy" for a date. The example below displays the booking's total as a currency, and its departure date with the day of the week:

using StellarAdmin.Resources.Displays;

columns.Add(booking => booking.Total, column =>
    column.UseDisplay<NumberDisplay>(number => number.Format = "C"));

columns.Add(booking => booking.DepartureDate, column =>
    column.UseDisplay<DateDisplay>(date => date.Format = "ddd d MMM yyyy"));

To format the value everywhere it's displayed, add [DisplayFormat] to the property instead:

[DisplayFormat(DataFormatString = "{0:C}")]
public decimal Total { get; set; }

[DataType(DataType.Date)] also sets a [DisplayFormat], which displays the culture's short date, such as 10/14/2026 in the en-US culture. To display the date as 14 Oct 2026 instead, set Format to "d MMM yyyy".

Choosing the cultureCopy Anchor Link

StellarAdmin formats values in the request's culture, so "C" displays the server's currency, unless your app sets a request culture with request localization.