How to use the DateAdd in c#

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Hello members,

need your help how to use the DateAdd function in c#.net. My problem is i have a manufactureDate and the ExpireryDate text boxes. I would like the Expiry date should calculate when 2years are added from the manufacturing date and fires the expiry date automatically in the ExpiryDate textbox

Thank you

Posted 4-Sep-11 1:32am

ssempijja

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3 solutions

Solution 2

You have the Datatype DateTime by Creating the obj for that DateTime then if that obj name is TodayDate means TodayDate.Now using this code you can get the today date
The you want to add 2 days after today means TodayDate.Now.AddDays(2) pervious 2 days means TodayDate.Now.AddDays(-1)
like this--
DateTime TodayDate = new DateTime();
TodayDate = DateTime.Now;
TodayDate.AddDays(1);
TodayDate.AddDays(-1);

Posted 11-Sep-13 1:41am

subhankar jana

Updated 11-Sep-13 1:43am

v2

Comments

[no name] 11-Sep-13 8:17am

If you had bothered to read the question, the OP wanted to add years not days. And you would have also seen that the question was answered in Solution 1 2 years ago.

Solution 3

C#

public class Example
{
   public static void Main()
   {
      TimeSpan interval = DateTime.Now - DateTime.Now.Date;
      string msg = String.Format("Elapsed Time Today: {0:d} hours.",
                                 interval);
      Console.WriteLine(msg);
   }
}

Posted 11-Sep-13 1:49am

subhankar jana

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Wendelius · Accepted Answer · 2011-09-04T01:45:00

If I understood correctly, you can first parse the text in the manufacturing date text box and then using AddYears calculate the expiration date. Something like:

C#

System.DateTime manufacturingDate;
System.DateTime expirationDate;

if (System.DateTime.TryParse("5.9.2010", out manufacturingDate)) {
   expirationDate = manufacturingDate.AddYears(2);
} else {
   // not a valid date
}

To make it more reliable you should define the format provider etc. as in DateTime.TryParse Method (String, IFormatProvider, DateTimeStyles, DateTime%)[^]