how to subtract a selected date from an integer value

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i am trying that code.

C#

dt.Subtract(new TimeSpan(totCount)).ToString();

but it subtract only one day where as count is 1,2,3,4,5,6..etc

and its gives a result like-

12/16/2011 11:59:59 PM but i want result like Wednesday, December 14, 2011

Please help me out.

Posted 27-Dec-11 1:00am

mayankshrivastava

Updated 27-Dec-11 1:01am

Karthik Harve

v2

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Comments

Karthik Harve 27-Dec-11 7:02am

[Edit] pre tags added.

Supriya Srivastav 27-Dec-11 7:02am

what's dt here?

mayankshrivastava 27-Dec-11 7:03am

date time

Richard MacCutchan 27-Dec-11 7:04am

Why are you trying to subtract a string from a DateTime?

mayankshrivastava 27-Dec-11 7:06am

m trying to subtract selected date from integer
my code is-
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();
lbldate.Text = dt.Subtract(new TimeSpan(totCount)).ToString();

4 solutions

Solution 4

int totalCount = 6;
            DateTime dt = DateTime.Now;
            dt = dt.AddDays(-totalCount);

Posted 27-Dec-11 1:45am

Hadi Basiri

Updated 27-Dec-11 11:23am

v2

Comments

RaviRanjanKr 27-Dec-11 17:26pm

[Edited]Code is wrapped in pre tag[/Edited]

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Accepted Answer · 2011-12-27T01:08:00

Solution 2

The problem is that you are using the wrong TimeSpan constructor: the Int64 version, which constructs a TimeSpan based on a number of ticks.
If you want to subtract a number of days, then do not construct a timespan, use the DateTime.AddDays method with a negative value parameter instead:

C#

int totalCount = 6;
DateTime dt = DateTime.Now;
dt = dt.AddDays(-totalCount);

Posted 27-Dec-11 1:08am

OriginalGriff

Comments

mayankshrivastava 27-Dec-11 7:14am

thanks ....

OriginalGriff 27-Dec-11 7:54am

You're welcome!

Supriya Srivastav · Accepted Answer · 2011-12-27T01:05:00

Solution 1

You Can try

DateTime date = (DateTime.Now).AddDays(-2);

You can replace DateTime.Now with your date and 2 with integer value.

Posted 27-Dec-11 1:05am

Supriya Srivastav

Updated 27-Dec-11 10:47am

v2

Comments

mayankshrivastava 27-Dec-11 7:16am

thaks supriya

Supriya Srivastav 27-Dec-11 7:37am

Welcome Dear....

mayankshrivastava 27-Dec-11 7:39am

My Pleasure...

RaviRanjanKr 27-Dec-11 17:12pm

[Edited]Code is wrapped in pre tag[/Edited]

Not Active · Accepted Answer · 2011-12-27T01:09:00

Solution 3

DateTime.AddDays[^] can take a negative number.

If your starting date is 12/16/2011 then

C#

dt.AddDays(-2);

will be 12/14/2001

Posted 27-Dec-11 1:09am

Not Active

how to subtract a selected date from an integer value

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how to subtract a selected date from an integer value

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