Compare Only time in formate like 10:15 AM

Question

2.00/5 (2 votes)

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Hello,

I have two time and i want to compare these two time and want to know which one is greater or smaller with AM or PM also.

if i have
10:15 AM and 2:00 PM

i use datetime and i convert that into string for taking as hh:mm tt

i use like

protected void Button1_Click(object sender, EventArgs e)
    {
        string s = "";
        s = drop_leave_hh.SelectedItem.Value + ":" + drop_leave_mm.SelectedItem.Value+""+drop_leave_time_dest.SelectedItem.Value;
       
        DateTime dt = System.Convert.ToDateTime(s);
        string leave_time = dt.ToString("hh:mm tt", System.Globalization.DateTimeFormatInfo.InvariantInfo);
        string nw = DateTime.Now.ToString("hh:mm tt", System.Globalization.DateTimeFormatInfo.InvariantInfo);
    }

so, i want to compare these two time.how can i achieve this.

Thanks in Advance...
Mitesh

Posted 19-Jul-12 18:48pm

Mits Machhi

Updated 19-Jul-12 19:13pm

v3

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**JF2015** · Accepted Answer · 2012-07-19T19:03:00

Solution 1

C#

private void Form1_Load(object sender, EventArgs e)
{
         string strtime1 = "10:15 AM";
         DateTime time1 = Convert.ToDateTime(strtime1);
         string strtime2 = "2:00 PM";
         DateTime time2 = Convert.ToDateTime(strtime2);

         if (time1.TimeOfDay > time2.TimeOfDay)
            MessageBox.Show("Time1 is later than Time2");
         else
            MessageBox.Show("Time2 is later than Time1");
}

Posted 19-Jul-12 19:03pm

JF2015

Updated 19-Jul-12 19:18pm

v2

Comments

[no name] 20-Jul-12 1:12am

Dear SIr, when i use DateTime time2 = Convert.ToDateTime(strtime2) statement i convert as Datetime as Whole not only time.

JF2015 20-Jul-12 1:18am

I modified my answer to only use the time part of the DateTime object for the comparison.

[no name] 20-Jul-12 1:40am

not success beacuse if first time i set 10:00 Am and Second i set 2:00 PM so, it display first one is Large . that is not the wayyy

[no name] 20-Jul-12 2:26am

string s = "";
s = drop_leave_hh.SelectedItem.Value + ":" + drop_leave_mm.SelectedItem.Value+""+drop_leave_time_dest.SelectedItem.Value;

DateTime dt = System.Convert.ToDateTime(s);
string leave_time = dt.ToString("hh:mm tt", System.Globalization.DateTimeFormatInfo.InvariantInfo);
string nw = DateTime.Now.ToString("hh:mm tt", System.Globalization.DateTimeFormatInfo.InvariantInfo);

DateTime now_date = Convert.ToDateTime(nw);
DateTime leave_time1 = Convert.ToDateTime(leave_time);

//now_date = now_date.ToString("HH:mm tt");
//leave_time1 = leave_time1.ToString("HH:mm tt");

if (leave_time1.TimeOfDay.Ticks > now_date.TimeOfDay.Ticks)
{
lbl_msg.Visible = true;
lbl_msg.Text = "Sorry";
}
else
{
lbl_msg.Visible = true;
lbl_msg.Text = "Success";
}

when i enter 12:00 Am so, it take Success when the System time is 11:45 Am because it take 12:00 AM as 00:00 Am.

JF2015 20-Jul-12 2:33am

So, what is the issue? If you enter "12:00 AM" this is per definition earlier than "11:45 AM" or "11:45 PM" since on a 24 hour scale this is "0:00" in the morning. Therefore, the above code works for me.
See: http://en.wikipedia.org/wiki/12-hour_clock#Confusion_at_noon_and_midnight

[no name] 20-Jul-12 2:39am

Dear Sir, if i Select the time as 12:00 Am and the System time is 11:45 AM, so it select the ahead time like 12:00 Am to 11:45 AM. so,it display message as Sorry but it take 12:00 AM as 0:00.

JF2015 20-Jul-12 2:42am

This happens because 12:00 AM is midnight or "0:00" and therefore before 11:45 AM if you want to compare against noon, you need to select 12:00 PM which is exactly 15 minutes after 11:45 AM.

[no name] 20-Jul-12 2:56am

thanks sir.. i am confuse and totally understand.....
Thanks a Lot...
My 5++++

JF2015 20-Jul-12 3:02am

Great!! Please read the wikipedia link from the comment above, this might help you to understand the time issue much better - I know that it is very difficult to understand and I also get it wrong often.