Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Increment DateTime Day, Hour, Minute, Second, Millisecond?

Posted on 2012-12-21
8
467 Views
Last Modified: 2012-12-22
I need to increment two datetime's by Day, Hour, Minute, Second, Millisecond.

 Help!

 private void btnLoadListbox_Click(object sender, EventArgs e)
        {
            List<string> list = new List<string>();

            var examDate = new DateTime(2012, 1, 1);
            var expireDate = new DateTime(2015, 1, 1);

            for (int i = 0; i < 100; i++)
            {
                var examDatePlus1Day = examDate.AddDays(1);
                var expireDatePlus1Day = expireDate.AddDays(1);

                list.Add(examDatePlus1Day + "," + expireDatePlus1Day);
            }

            foreach (var s in list)
            {
                listBox1.Items.Add(s);
            }
        }
0
Comment
Question by:pointeman
8 Comments
 
LVL 15

Expert Comment

by:Ess Kay
ID: 38714504
Assuming you want to add 30 minutes to a given DateTime, you can use AddMinutes.

TestTime.AddMinutes(30);


Another way of doing it:

DateTime TestTime = DateTime.Parse("22 Jun 2009 14:20:00");
// Add 30 minutes
TestTime = TestTime + TimeSpan.Parse("00:30:00");
0
 
LVL 15

Expert Comment

by:Ess Kay
ID: 38714506
if you are to run a loop,     yourtimevariable.addseconds(1);
should do the trick
0
 

Author Comment

by:pointeman
ID: 38714611
I need to increment two datetime's by Day, Hour, Minute, Second, Millisecond.
0
Free Tool: Postgres Monitoring System

A PHP and Perl based system to collect and display usage statistics from PostgreSQL databases.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 
LVL 75

Assisted Solution

by:käµfm³d 👽
käµfm³d   👽 earned 167 total points
ID: 38714642
You can chain your arithmetic together:

DateTime result = examDate.AddDays(1).AddHours(1).AddMinutes(1).AddSeconds(1).AddMilliseconds(1);

Open in new window

0
 

Author Comment

by:pointeman
ID: 38714771
I did the chaining and it didn't work. Now looking at my code example I notice the problem is that I'm incrementing the original date repeatedly. I need to Add to the newly incremented date.
0
 
LVL 85

Accepted Solution

by:
Mike Tomlinson earned 167 total points
ID: 38714840
Change this:

            for (int i = 0; i < 100; i++)
            {
                var examDatePlus1Day = examDate.AddDays(1);
                var expireDatePlus1Day = expireDate.AddDays(1);

                list.Add(examDatePlus1Day + "," + expireDatePlus1Day);
            }

To this:

            for (int i = 0; i < 100; i++)
            {
                examDate = examDate.AddDays(1);
                expireDate = expireDate.AddDays(1);

                list.Add(examDate + "," + expireDate);
            }
0
 
LVL 55

Assisted Solution

by:Jaime Olivares
Jaime Olivares earned 166 total points
ID: 38715039
I think using TimeSpan produces a cleaner code:

         DateTime dt = DateTime.Now;
         TimeSpan ts = new TimeSpan(1,0,0,0);  // 1 day, 0 hours, 0 minutes, 0 seconds
     
         for (var i=0; i<100; i++)
         {
             Console.WriteLine(dt);
             dt += ts;  // The date is increased here
         }
0
 

Author Closing Comment

by:pointeman
ID: 38715622
Excellent, thank you all.
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

We all know that functional code is the leg that any good program stands on when it comes right down to it, however, if your program lacks a good user interface your product may not have the appeal needed to keep your customers happy. This issue can…
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…

860 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question