DateTimeFormatInfo.GetShortestDayName(DayOfWeek) Method

Definition

Namespace:

System.Globalization

Assembly:

System.Runtime.dll

Source:

DateTimeFormatInfo.cs

Obtains the shortest abbreviated day name for a specified day of the week associated with the current DateTimeFormatInfo object.

public:
 System::String ^ GetShortestDayName(DayOfWeek dayOfWeek);

public string GetShortestDayName (DayOfWeek dayOfWeek);

member this.GetShortestDayName : DayOfWeek -> string

Public Function GetShortestDayName (dayOfWeek As DayOfWeek) As String

Parameters

dayOfWeek

DayOfWeek

One of the DayOfWeek values.

Returns

String

The abbreviated name of the week that corresponds to the dayOfWeek parameter.

Exceptions

ArgumentOutOfRangeException

dayOfWeek is not a value in the DayOfWeek enumeration.

Examples

The following example demonstrates several methods and properties that specify date and time format patterns, native calendar name, and full and abbreviated month and day names.

string[] myDateTimePatterns = ["MM/dd/yy", "MM/dd/yyyy"];

// Get the en-US culture.
CultureInfo ci = new("en-US");
// Get the DateTimeFormatInfo for the en-US culture.
DateTimeFormatInfo dtfi = ci.DateTimeFormat;

// Display the effective culture.
Console.WriteLine("This code example uses the {0} culture.", ci.Name);

// Display the native calendar name.
Console.WriteLine("\nNativeCalendarName...");
Console.WriteLine($"\"{dtfi.NativeCalendarName}\"");

// Display month genitive names.
Console.WriteLine("\nMonthGenitiveNames...");
foreach (string name in dtfi.MonthGenitiveNames)
{
    Console.WriteLine($"\"{name}\"");
}

// Display abbreviated month genitive names.
Console.WriteLine("\nAbbreviatedMonthGenitiveNames...");
foreach (string name in dtfi.AbbreviatedMonthGenitiveNames)
{
    Console.WriteLine($"\"{name}\"");
}

// Display shortest day names.
Console.WriteLine("\nShortestDayNames...");
foreach (string name in dtfi.ShortestDayNames)
{
    Console.WriteLine($"\"{name}\"");
}

// Display shortest day name for a particular day of the week.
Console.WriteLine("\nGetShortestDayName(DayOfWeek.Sunday)...");
Console.WriteLine($"\"{dtfi.GetShortestDayName(DayOfWeek.Sunday)}\"");

// Display the initial DateTime format patterns for the 'd' format specifier.
Console.WriteLine("\nInitial DateTime format patterns for the 'd' format specifier...");
foreach (string name in dtfi.GetAllDateTimePatterns('d'))
{
    Console.WriteLine($"\"{name}\"");
}

// Change the initial DateTime format patterns for the 'd' DateTime format specifier.
Console.WriteLine("\nChange the initial DateTime format patterns for the \n" +
                  "'d' format specifier to my format patterns...");
dtfi.SetAllDateTimePatterns(myDateTimePatterns, 'd');

// Display the new DateTime format patterns for the 'd' format specifier.
Console.WriteLine("\nNew DateTime format patterns for the 'd' format specifier...");
foreach (string name in dtfi.GetAllDateTimePatterns('d'))
{
    Console.WriteLine($"\"{name}\"");
}

/*
Output:

This code example uses the en-US culture.

NativeCalendarName...
"Gregorian Calendar"

MonthGenitiveNames...
"January"
"February"
"March"
"April"
"May"
"June"
"July"
"August"
"September"
"October"
"November"
"December"
""

AbbreviatedMonthGenitiveNames...
"Jan"
"Feb"
"Mar"
"Apr"
"May"
"Jun"
"Jul"
"Aug"
"Sep"
"Oct"
"Nov"
"Dec"
""

ShortestDayNames...
"S"
"M"
"T"
"W"
"T"
"F"
"S"

GetShortestDayName(DayOfWeek.Sunday)...
"S"

Initial DateTime format patterns for the 'd' format specifier...
"M/d/yyyy"
"MMM d, yyyy"
"M/d/yy"

Change the initial DateTime format patterns for the
'd' format specifier to my format patterns...

New DateTime format patterns for the 'd' format specifier...
"MM/dd/yy"
"MM/dd/yyyy"

*/

Dim myDateTimePatterns() As String = {"MM/dd/yy", "MM/dd/yyyy"}
Dim name As String = ""

' Get the en-US culture.
Dim ci As New CultureInfo("en-US")
' Get the DateTimeFormatInfo for the en-US culture.
Dim dtfi As DateTimeFormatInfo = ci.DateTimeFormat

' Display the effective culture.
Console.WriteLine("This code example uses the {0} culture.", ci.Name)

' Display the native calendar name.    
Console.WriteLine(vbCrLf & "NativeCalendarName...")
Console.WriteLine("""{0}""", dtfi.NativeCalendarName)

' Display month genitive names.
Console.WriteLine(vbCrLf & "MonthGenitiveNames...")
For Each name In dtfi.MonthGenitiveNames
    Console.WriteLine("""{0}""", name)
Next name

' Display abbreviated month genitive names.
Console.WriteLine(vbCrLf & "AbbreviatedMonthGenitiveNames...")
For Each name In dtfi.AbbreviatedMonthGenitiveNames
    Console.WriteLine("""{0}""", name)
Next name

' Display shortest day names.
Console.WriteLine(vbCrLf & "ShortestDayNames...")
For Each name In dtfi.ShortestDayNames
    Console.WriteLine("""{0}""", name)
Next name

' Display shortest day name for a particular day of the week.
Console.WriteLine(vbCrLf & "GetShortestDayName(DayOfWeek.Sunday)...")
Console.WriteLine("""{0}""", dtfi.GetShortestDayName(DayOfWeek.Sunday))

' Display the initial DateTime format patterns for the 'd' format specifier.
Console.WriteLine(vbCrLf & "Initial DateTime format patterns for " &
                  "the 'd' format specifier...")
For Each name In dtfi.GetAllDateTimePatterns("d"c)
    Console.WriteLine("""{0}""", name)
Next name

' Change the initial DateTime format patterns for the 'd' DateTime format specifier.
Console.WriteLine(vbCrLf & "Change the initial DateTime format patterns for the " &
                  vbCrLf & "'d' format specifier to my format patterns...")
dtfi.SetAllDateTimePatterns(myDateTimePatterns, "d"c)

' Display the new DateTime format patterns for the 'd' format specifier.
Console.WriteLine(vbCrLf &
                  "New DateTime format patterns for the 'd' format specifier...")
For Each name In dtfi.GetAllDateTimePatterns("d"c)
    Console.WriteLine("""{0}""", name)
Next name

'Output:
'
'This code example uses the en-US culture.
'
'NativeCalendarName...
'"Gregorian Calendar"
'
'MonthGenitiveNames...
'"January"
'"February"
'"March"
'"April"
'"May"
'"June"
'"July"
'"August"
'"September"
'"October"
'"November"
'"December"
'""
'
'AbbreviatedMonthGenitiveNames...
'"Jan"
'"Feb"
'"Mar"
'"Apr"
'"May"
'"Jun"
'"Jul"
'"Aug"
'"Sep"
'"Oct"
'"Nov"
'"Dec"
'""
'
'ShortestDayNames...
'"S"
'"M"
'"T"
'"W"
'"T"
'"F"
'"S"
'
'GetShortestDayName(DayOfWeek.Sunday)...
'"S"
'
'Initial DateTime format patterns for the 'd' format specifier...
'"M/d/yyyy"
'"MMM d, yyyy"
'"M/d/yy"
'
'Change the initial DateTime format patterns for the
''d' format specifier to my format patterns...
'
'New DateTime format patterns for the 'd' format specifier...
'"MM/dd/yy"
'"MM/dd/yyyy"
'