comparing dates in C#

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how do i compare dates in C#. example d1 = february 1, 2012, d2 = january 1, 2012

condition d2 must be greater than d1 if not an error prompt occur

how do i do this?

thanks in advance

Posted 23-Feb-12 3:28am

newbie011292

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3 solutions

Solution 2

It is easy and normal, my friend:

C#

if(d1 < d2)
{
    // Code in case of correct date relation
}
else
{
    // Code in case of error (d2 less than or equal to d1)
}

Posted 23-Feb-12 3:44am

youssef_123

Updated 23-Feb-12 4:00am

v2

Comments

youssef_123 23-Feb-12 9:48am

but they must be both of type DateTime

newbie011292 23-Feb-12 11:11am

thank you

Solution 1

Use the TimeSpan Compare method[^].

Posted 23-Feb-12 3:41am

Abhinav S

Comments

Manfred Rudolf Bihy 23-Feb-12 9:58am

I think you wanted to say DateTime.CompareTo or the static counterpart DateTime.Compare. There is no need for a Timespan here.

newbie011292 23-Feb-12 11:11am

thank you

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Manfred Rudolf Bihy · Accepted Answer · 2012-02-23T03:53:00

This is only a simple example and I advise you to use TryParse instead of parse, but the example is sufficient to illustrate what to do:

C#

static void Main()
{
    DateTime d1 = DateTime.Parse("February 1, 2012"); // Better to use TryParse here
    DateTime d2 = DateTime.Parse("January  1, 2012"); // ditto

    if (DateTime.Compare(d1, d2) < 0) // also possible to use d1.CompareTo(d2). If the result is less than zero d1 is less than d2
    //if (d1 < d2) // As Youssef pointed out the normal relational less than or greater than operator can also be used
    {
        Console.WriteLine("Everything OK!");
    }
    else
    {
        Console.WriteLine("Do what ever you see fit in the error case!");
    }
}