Question

Is there a method in C# which can compare dates like the SQL DateDiff method, including time part argument?

For example I have two dates:

DateTime early = "2013.02.01 07:31:15";
DateTime soon = "2013.02.01 23:48:35";

if (Compare(early, soon, DAY) == true)
{
   //I want to be here
}

I want to get info that these two objects are equal in year, month and day; the rest is not important to me.

Answer 1

You can use DateTime.Date:

if(early.Date == soon.Date)
{
} 

if you want accurancy of hours:

if(early.Date == soon.Date && early.Hour == soon.Hour)
{
} 

But, with this solution you will have “12/03/1857 23:59” != “13/03/1857 00:00”. If you want to check their “distance”:

if(early.Substract(soon).Duration() <= TimeSpan.FromHours(1))
{
}

.Duration() gets the “absolute” value of the time span (because early.Substract(soon) can be “positive” or “negative”).