Assembly: Microsoft.VisualBasic (in microsoft.visualbasic.dll)
public static string FormatDateTime ( DateTime Expression, [OptionalAttribute] DateFormat NamedFormat )
public static String FormatDateTime ( DateTime Expression, /** @attribute OptionalAttribute() */ DateFormat NamedFormat )
public static function FormatDateTime ( Expression : DateTime, NamedFormat : DateFormat ) : String
Required. Date expression to be formatted.
Optional. Numeric value that indicates the date/time format used. If omitted, DateFormat.GeneralDate is used.
Return ValueReturns a string expression representing a date/time value.
For more detailed information, see the Visual Basic topic FormatDateTime Function (Visual Basic).
The Date data type always contains both date and time information. For purposes of type conversion, Visual Basic considers 1/1/1 (January 1 of the year 1) to be a neutral value for the date, and 00:00:00 (midnight) to be a neutral value for the time. If you format a Date value as a date/time string, FormatDateTime does not include neutral values in the resulting string. For example, if you convert #1/1/0001 9:30:00# to a string, the result is "9:30:00 AM"; the date information is suppressed. However, the date information is still present in the original Date value and can be recovered with functions such as DatePart.
If you pass the Expression argument as a String literal, FormatDateTime interprets it according to the CurrentCulture setting of your application. However, if you pass it as a Date literal, use the format #mm/dd/yyyy#, because FormatDateTime always interprets a Date literal according to the English (US) culture. This is necessary because, if an application is developed and coded using Date literals from one culture, but is then executed on a platform with a different culture, the Date literals could be parsed incorrectly.
The NamedFormat argument has the following settings.
Display a date and/or time. Display a date part as a short date. If there is a time part, display it as a long time. If present, both parts display.
Display a date using the long date format specified in your computer's regional settings.
Display a date using the short date format specified in your computer's regional settings.
Display a time using the time format specified in your computer's regional settings.
Display a time using the 24-hour format (hh:mm).
This example demonstrates the use of the FormatDateTime function.
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.
Other ResourcesFormatDateTime Function (Visual Basic)
FormatCurrency Function (Visual Basic)
FormatNumber Function (Visual Basic)
FormatPercent Function (Visual Basic)
DatePart Function (Visual Basic)
String Manipulation Summary