i have a doubt in datetimepicker tool in c#.

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hai friends
i have a doubt in datetimepicker tool in c#.

1.
I have to display remaining days in a selected date use only one datetimepicker.
for eg today date is 22-apr-2011. remaining days upto 31-mar-2012.
if it is jan, feb and mar it should display the days of current year
for eg 12-jan-2011 remaining days upto 31-mar-2011.

2.
Display the days of current month using datetimepicker tool in c#.
eg. if i am selecting jan month, the textbox should tells days = 31

Posted 22-Apr-11 1:13am

laurancelove

Updated 22-Apr-11 1:54am

Kim Togo

v2

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BlackJack99 22-Apr-11 8:08am

2nd answer is as Kim Togo said, and for question 1, i dont really get it, are trying to calculate the difference between the date selected and today? or the difference with 31/03/2012?

Ankur^\m/ 22-Apr-11 8:23am

Use 'Add Comment' below user's answer to discuss with him/her. He never gets notified if on add an answer.

3 solutions

Solution 1

A DateTimePicker class, you have the ability to custom format what informations you what to display.

DateTimePicker.CustomFormat[^]

If you known a start date and end date, use can you TimeSpan class to get total days.

DateTime start = DateTime.Now;
DateTime end = DateTime.Now.AddDays(25);

TimeSpan span = end - start;
int totalDays = span.TotalDays;

About question 2.

Take a look at DateTime.DaysInMonth[^]

You give it year and month and it will return total days in that year and month.

Posted 22-Apr-11 1:57am

Kim Togo

Updated 22-Apr-11 2:03am

v2

Comments

Ankur^\m/ 22-Apr-11 8:21am

[moved from answer]
OP wrote:
Q 1. i have mentioned i am using only one calendar to calculate days upto 31st mar

Q 2. year and month may vary. so i have to calculate using datetimepicker tool to calculate days in month

Solution 5

yes friend now my problem is over.

i have another question in 1st query.

when i choose 11-apr-2011 it shows 354 days.but i need, it should consider

only be-forth date that is 10-apr-2011 so days = 355

2nd.

in my 2nd question if i am selecting the date like 12-may-2011 the

textbox should tells the remaining days= 20 because 11-may should take.

else days = 31

Posted 22-Apr-11 6:03am

laurancelove

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*dan!sh* · Accepted Answer · 2011-04-22T03:18:00

1. Where do you need to display the days? In the DateTimePicker or in the textbox? If it is DateTimePicker, you are using the wrong control for this purpose. If you want to display it in the textbox, you the following:

int daysToGo;
if(yourDateTimePicker.Value.Month > 3){
daysToGo = (new DateTime(yourDateTimePicker.Value.Year + 1,3,31) - yourDateTimePicker.Value).Days;
}
else{
daysToGo = (new DateTime(yourDateTimePicker.Value.Year,3,31) - yourDateTimePicker.Value).Days;
}

2. This should help:

yourTextBox.Text = DateTime.DaysInMonth(yourDateTimePicker.Value.Year, yourDateTimePicker.Value.Month).ToString();