C ES1en. net and SQL method of determining whether a given year is a leap year
- 2020-11-25 07:28:57
- OfStack
This article describes how to determine whether a given date is a leap year in c#, ES2en.net,sql. Share to everybody for everybody reference. Specific implementation methods are as follows:
The C# code is as follows:
public bool IsLeapYear(int year)
{
if ((year < 1) || (year > 9999))
{
throw new ArgumentOutOfRangeException("year", " The year must be from 1 to 9999 Between the digital .");
}
if ((year % 4) != 0)
{
return false;
}
if ((year % 100) == 0)
{
return ((year % 400) == 0);
}
return true;
}
VB.NET:
Public Function IsLeapYear(year As Integer) As Boolean
If (year < 1) OrElse (year > 9999) Then
Throw New ArgumentOutOfRangeException("year", " The year must be from 1 to 9999 Between the digital .")
End If
If (year Mod 4) <> 0 Then
Return False
End If
If (year Mod 100) = 0 Then
Return ((year Mod 400) = 0)
End If
Return True
End Function
The sql code is as follows:
udf_DaysInMonth_Ver2
CREATE FUNCTION [dbo].[udf_DaysInMonth]
(
@Date DATETIME
)
RETURNS INT
AS
BEGIN
RETURN CASE WHEN MONTH(@Date) IN (1,3,5,7,8,10,12) THEN 31
WHEN MONTH(@Date) IN (4,6,9,11) THEN 30
ELSE CASE WHEN (YEAR(@Date) % 4 = 0 AND YEAR(@Date) % 100 <> 0) OR (YEAR(@Date) % 400 = 0)
THEN 29
ELSE 28
END
END
END
So I've written all three instances directly in code.
I hope this article has been helpful for your C#, ES24en.NET and SQL programming.