how to subtract a selected date from an integer value

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I want to subtract a date from an integer
for example-
(27 December - 2)=25 DECEMBER

my code is here-

C#

DateTime dt = new DateTime();
dt = Calendar.SelectedDate;
dt = dt.AddDays(Convert.ToInt32(txtadd.Text));
lblgetdate.Text = dt.ToLongDateString();

DateTime sDate = new DateTime();
sDate = Calendar.SelectedDate;
DateTime eDate = new DateTime();
eDate = Convert.ToDateTime(lblgetdate.Text);
DayOfWeek fWeek = DayOfWeek.Friday;
int totCount = findWeekCount(sDate, eDate, fWeek);
lblweekday.Text = totCount.ToString();

I want to subtract (lblgetday - lblweekday)

Please help me.

Posted 26-Dec-11 23:25pm

mayankshrivastava

Updated 27-Dec-11 7:51am

Wendelius

v3

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Wendelius 27-Dec-11 13:52pm

Pre tags added

5 solutions

Solution 1

DateTime has a AddDays method for this:

C#

var date = DateTime.Parse("27 december 2011").AddDays(-2);

Posted 26-Dec-11 23:29pm

Mehdi Gholam

Comments

mayankshrivastava 27-Dec-11 5:36am

here is my code
DateTime dt = new DateTime();
dt = Calendar.SelectedDate;
dt = dt.AddDays(Convert.ToInt32(txtadd.Text));
lblgetdate.Text = dt.ToLongDateString();

DateTime sDate = new DateTime();
sDate = Calendar.SelectedDate;
DateTime eDate = new DateTime();
eDate = Convert.ToDateTime(lblgetdate.Text);
DayOfWeek fWeek = DayOfWeek.Friday;
int totCount = findWeekCount(sDate, eDate, fWeek);
lblweekday.Text = totCount.ToString();

i want to subtract (lblgetday - lblweekday)

Please help me.

Solution 2

How about this

C#

DateTime yesterday = DateTime.Today.AddDays( -2 );

or your date time variable here

Posted 26-Dec-11 23:31pm

demouser743

Updated 26-Dec-11 23:34pm

v2

Solution 4

dim dt as new date
dt="27-12-2011"
dim da as interger=dt.day
da=da-2
dt=da & "-" & dt.month & "-" & dt.year

Posted 26-Dec-11 23:36pm

Tanveer A

Solution 5

VB

DateTime d = new DateTime(1999, 6, 1);
//You can do this:
d.Subtract(new TimeSpan(2, 0, 0, 0)).ToString();
//output: 5/30/1999 12:00:00 AM

//or this
d.AddDays(-2);
//output: 5/30/1999 12:00:00 AM

Posted 27-Dec-11 1:48am

Hadi Basiri

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Om Prakash Pant · Accepted Answer · 2011-12-26T23:34:00

Solution 3

C#

DateTime d = new DateTime(1999, 6, 1);
//You can do this:
d.Subtract(new TimeSpan(2, 0, 0, 0)).ToString();
//output: 5/30/1999 12:00:00 AM

//or this
d.AddDays(-2);
//output: 5/30/1999 12:00:00 AM

Posted 26-Dec-11 23:34pm

Om Prakash Pant

Comments

mayankshrivastava 27-Dec-11 5:52am

here if i want a output like Thursday, December 29, 2011 and no time reqiured.

mayankshrivastava 27-Dec-11 5:52am

and thnaks for giving me this code.

mayankshrivastava 27-Dec-11 6:55am

my code is-
dt.Subtract(new TimeSpan(totCount)).ToString();
but it subtract only one day where as count is 1,2,3,4,5,6..etc