c# check date is weekend or weekday

Question

DayOfWeek today = DateTime.Today.DayOfWeek;
if (today == DayOfWeek.Sunday || today == DayOfWeek.Saturday)
{
  ClientScript.RegisterStartupScript(GetType(), "alert", "alert('" weekend"');", true);
}
else
{
    ClientScript.RegisterStartupScript(GetType(), "alert", "alert('" weekday"');", true);
}

From line above i am able to find if today is weekend or weekday

now i want to get the date from user input i tried this but fail,

my text input format : 2016-10-04

string dateInput = dateTextbox.Text;
DayOfWeek today = DateTime.dateInput.DayOfWeek;

`dateInput` is a string, you need to convert it to `DateTime` object. There are dozens of Similar questions on StackOverflow *How to convert a String to DateTime in C#* — Zein Makki, Nov 08 '16 at 08:27
Right, so what you're *really* asking is "How can I convert a string into a `DateTime`?" - as you have the rest of the code already. — Jon Skeet, Nov 08 '16 at 08:29
funny ppl everywhere,marked my post as duplicate but cannot provide any link — KyLim, Nov 08 '16 at 08:37

fubo · Accepted Answer · 2016-11-08T09:13:38.960

4

Use DateTime.ParseExact to parse your string into a DateTime

string dateInput = dateTextbox.Text; //"2016-10-04"
DateTime dtResult = DateTime.ParseExact(dateInput, "yyyy-MM-dd", CultureInfo.InvariantCulture);
DayOfWeek today = dtResult.DayOfWeek;

edited Nov 08 '16 at 09:13

answered Nov 08 '16 at 08:46

fubo

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,hi how to check the input is weekday or weekend? – KyLim Nov 08 '16 at 08:48
as you mentioned `if (today == DayOfWeek.Sunday || today == DayOfWeek.Saturday)` – fubo Nov 08 '16 at 08:48
@KyLim I don't know if you have 24h or 12h format. for 24 use `HH`, for 12 `hh` – fubo Nov 08 '16 at 08:51
hye master fubo, getting error in this line DateTime dtResult = DateTime.ParseExact(dateInput, "yyyy-MM-dd hh:mm:ss.fff", CultureInfo.InvariantCulture); error message : System.FormatException: String was not recognized as a valid DateTime. – KyLim Nov 08 '16 at 08:56
2016-11-08 ,this is the content i get – KyLim Nov 08 '16 at 09:03

Nikhil Agrawal · Answer 2 · 2016-11-08T11:14:34.670

2

IMO, you should use some DateTime control instead of a TextBox to enter DateTime. till then you need to convert TextBox Text to DateTime object first.

DateTime dt = DateTime.ParseExact(dateTextbox.Text, 
                                  "YYYY-MM-DD", 
                                  CultureInfo.InvariantCulture);

FYI, there are numerous ways to convert String to DateTime (google will help). All have their pros and cons. Use which best suits you.

edited Nov 08 '16 at 11:14

answered Nov 08 '16 at 08:26

Nikhil Agrawal

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(today == DayOfWeek.Sunday || today == DayOfWeek.Saturday) cannot compare against dayofweek and datetime – KyLim Nov 08 '16 at 08:29
1

if(dt.DayOfWeek == DayOfWeek.Sunday || dt.DayOfWeek == DayOfWeek.Saturday) – Nikhil Agrawal Nov 08 '16 at 08:30
@KyLim: So you need to use the `DayOfWeek` property once you've converted it into a `DateTime`. You clearly know about the `DayOfWeek` property, because you're using it in the question. Software engineering is all about breaking a "big" problem into lots of tiny steps. – Jon Skeet Nov 08 '16 at 08:30
@KyLim: Use a DateTime Control. – Nikhil Agrawal Nov 08 '16 at 08:33
@NikhilAgrawal DateTime Control able check date is weekday or weekend? – KyLim Nov 08 '16 at 08:34
this answer is too vague since you don't know if `DateTime.Parse` does work - and _google for your problem on your own_ could also be a comment – Impostor Nov 08 '16 at 08:39
@KyLim: No. With TextBox, 20 users can put date in 20 diff formats, with DTControl you can eliminate that issue. – Nikhil Agrawal Nov 08 '16 at 08:42
$('.datepicker').daterangepicker({ "singleDatePicker": true, "showDropdowns": true, "autoApply": true, locale: { format: 'YYYY-MM-DD' } }); user input is same format – KyLim Nov 08 '16 at 08:43

c# check date is weekend or weekday

2 Answers2