Solved

C# working with TIME only, and no DATE

Posted on 2009-05-15
7
1,238 Views
Last Modified: 2012-06-21
I've been trying to find a way to determine if my current time of day is between a start and stop time. I don't really care about the date, and actually would prefer to not use it at all.   I've tried a number of approach angles on this, but am not having success.  I'm a novice, so assume nothing on my part when proposing a solution, please.

My current code is:
if (DateTime.Compare(DateTime.Now, dtStart) > 0 && DateTime.Compare(DateTime.Now, dtEnd) < 0)
In this, dtStart = {5/15/2009 7:00:00 AM}  and dtEnd = {5/15/2009 12:30:00 PM}

It's currently 7:39 AM so we are between those times, yet my DateTime.Compare above yields False, so my code bails out on the else of the if/else.  

I'm TOTALLY open to approaching this from a different angle if one is more reliable.  I just hate working with the DateTime object.  It is exceedingly confusing to me.
0
Comment
Question by:DJGray
7 Comments
 
LVL 26

Accepted Solution

by:
Anurag Thakur earned 250 total points
ID: 24396338
you can use the time class from the following link to achieve the functionality
http://www.csharphelp.com/archives4/archive682.html
0
 
LVL 16

Expert Comment

by:ToddBeaulieu
ID: 24396407
Hmm. Your code looked ok to me. I ran a quick test and it seems to work fine for me.

I set the end date to an earlier time and it evaluated as being outside the range.

		DateTime dtStart = DateTime.Parse("5/15/2009 7:00:00 AM");

		DateTime dtEnd = DateTime.Parse("5/15/2009 12:30:00 PM");

		

		if (DateTime.Compare(DateTime.Now, dtStart) > 0 && DateTime.Compare(DateTime.Now, dtEnd) < 0)

			Console.WriteLine("The current Time falls WITHIN the test range.");

		else

			Console.WriteLine("The current Time falls OUTSIDE the test range.");

Open in new window

0
 
LVL 62

Expert Comment

by:Fernando Soto
ID: 24396493
Hi DJGray;

The code snippet below worked for me. It is using your if statement. Can you post how you are initializing dtStart and dtEnd.

Fernando
DateTime dtStart = new DateTime(2009, 5, 15, 7, 0, 0);

DateTime dtEnd = new DateTime(2009, 5, 15, 12, 30, 0);
 

if (DateTime.Compare(DateTime.Now, dtStart) > 0 && DateTime.Compare(DateTime.Now, dtEnd) < 0)

{

    Console.WriteLine("I am in the time frame");

}

else

{

    Console.WriteLine("I am NOT in the  time frame");

}

Open in new window

0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 

Author Comment

by:DJGray
ID: 24396902
Sure.  I have a DBAccessor  class I call thusly:

 DateTime dtStart = myDB.GetStartTime(myConn);
 DateTime dtEnd = myDB.GetStopTime(myConn);

Those calls are fed like this:
 internal DateTime GetStartTime(SqlConnection conn)
 {
     SqlCommand myCmd = new SqlCommand("Select StartTime from ServerStatus where ServerStatusId = 1", conn);
     DateTime StartTime = (DateTime)myCmd.ExecuteScalar();
     return StartTime;
}

When I get some time, I'm going to look at the class that ragi0017 linked to.  

0
 
LVL 3

Expert Comment

by:channa_m
ID: 24397323
Try this and let me know if this works.

startDate and endDate can be any valid dates either pulled from database or textbox etc.,
    DateTime startDate = Convert.ToDateTime("5/15/2009 7:00:00 AM");

        DateTime endDate = Convert.ToDateTime("5/15/2009 4:00:00 PM");
 

        if (DateTime.Now > startDate && DateTime.Now < endDate)

        {

            Response.Write("Valid");

        }

        else

        {

            Response.Write("Invalid");

        }

Open in new window

0
 
LVL 62

Expert Comment

by:Fernando Soto
ID: 24397360
Also place some

Console.WriteLine(dtStart.ToString());
Console.WriteLine(dtEnd.ToString());

Before the if statement to confirm that the dates are what you think they are.
0
 

Author Closing Comment

by:DJGray
ID: 31581943
Generally, I'm not a fan of the "link to" solutions, but in this case, the link is spot on.  It's exactly what I needed, and I'm surprised I couldn't find it with multiple Google searches.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Suggested Solutions

Introduction                                                 Was the var keyword really only brought out to shorten your syntax? Or have the VB language guys got their way in C#? What type of variable is it? All will be revealed.   Also called…
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…
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…
Video by: Mark
This lesson goes over how to construct ordered and unordered lists and how to create hyperlinks.

863 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

Need Help in Real-Time?

Connect with top rated Experts

22 Experts available now in Live!

Get 1:1 Help Now