How to Generate Date - asp.net

Question

I have a form and on a button click I automatically generate a date exactly a year in the future. I would like to know how to make sure that this date is not on a public holiday or on a weekend. Any help please ?
I would like to store the value of the date inside a variable in order to just place it inside the command.Parameters.AddWithValue("#DueDate",___________)

Answer 1

You can create your own logic for this. It's quite simple. Create a method that check if the date is a weekday or a holiday. But you have to hard-code the holidays since they differ per country/continent/culture etc.
public bool IsWeekday(DateTime date)
{
int dayOfWeek = (int)date.DayOfWeek;
//week starts on sunday
if (dayOfWeek == 0 || dayOfWeek == 6)
{
return false;
}
else
{
return true;
}
}
public bool IsHoliday(DateTime date)
{
int currentYear = DateTime.Now.Year;
//define your holidays here, they differ between cultures and continents etc
List<DateTime> holidays = new List<DateTime>()
{
new DateTime(currentYear, 1, 1), //new years day
new DateTime(currentYear, 1, 9), //for testing
new DateTime(currentYear, 4, 27), //kings day
new DateTime(currentYear, 6, 21), //longest day of the year
new DateTime(currentYear, 12, 25), //christmas
new DateTime(currentYear, 12, 26) //christmas
};
//check the date against the list of holidays
if (holidays.Any(x => x == date.Date))
{
return true;
}
else
{
return false;
}
}
Now you can check if it works.
//get a monday
DateTime monday = new DateTime(2019, 1, 7);
//loop all days of the week
for (int i = 0; i < 7; i++)
{
DateTime nextDay = monday.AddDays(i);
Label1.Text += string.Format("{0} - {1} - {2}<br>", nextDay.ToLongDateString(), IsWeekday(nextDay), IsHoliday(nextDay));
}
Result of the above loop
maandag 7 januari 2019 - True - False
dinsdag 8 januari 2019 - True - False
woensdag 9 januari 2019 - True - True
donderdag 10 januari 2019 - True - False
vrijdag 11 januari 2019 - True - False
zaterdag 12 januari 2019 - False - False
zondag 13 januari 2019 - False - False