how can i compare the dates in C#.net

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Hi All,

If I have two textboxes and I give two dates.

I am checking the second textbox date should be greater than the first textbox date.

How can I compare the dates in C#.net?

for e.g.

TextBox1.Text='2011-06-16T05:07:57+0000'
TextBox2.Text='2011-06-16T06:07:57+0000'

Please help me.

Posted 15-Jun-11 20:42pm

Mahadev Hatti

Updated 15-Jun-11 21:12pm

Dalek Dave

v4

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Comments

Dalek Dave 16-Jun-11 3:12am

Edited for Grammar and Readability.

7 solutions

Solution 5

Convert the dates to DATETIME object with
DateTime.ParseExact()

and then compare with comparison operator <

Posted 15-Jun-11 20:54pm

koolprasad2003

Comments

Dalek Dave 16-Jun-11 3:14am

Certainly a good option.

Vivek Krishnamurthy 16-Jun-11 3:20am

Usign datetime picker would be best. If you have to use text box for some reason ParseExact. However ParseExact throws FormatException. better you use DateTime.TryParseExact. read more at
http://msdn.microsoft.com/en-us/library/system.datetime.tryparseexact.aspx

Solution 4

Use this:

DateTime fromdate = Convert.ToDateTime(TextBox1.Text);
DateTime todate = Convert.ToDateTime(TextBox2.Text);
if (todate.CompareTo(fromdate) < 0)
{
//your code

}

Posted 15-Jun-11 20:53pm

Ramalinga Koushik

Updated 15-Jun-11 20:54pm

v2

Comments

Dalek Dave 16-Jun-11 3:15am

Simple to correct.

[no name] 16-Jun-11 3:32am

Thanks Dalek.

Solution 7

string s = "2011-06-16T05:07:57+0000";
string t = "2011-07-16T06:07:57+0000";

DateTime theDateA = DateTime.Parse(s);
DateTime theDateB = DateTime.Parse(t);

if (theDateB > theDateA)
{
   // blah blah
}

Give it a try

Posted 17-Jun-11 3:48am

UJimbo

Comments

Db issues 29-Aug-11 2:24am

i have a problem, when i select a date time picker less than the condition, i found error(that i specified), than i receive continuous error again and again, i didnt specify any loop there, what is the cause of that

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Sergey Alexandrovich Kryukov · Accepted Answer · 2011-06-15T20:52:00

Don't compare strings with string representation of dates, compare time values in the form of structure System.DateTime.

First of all, do you really have to enter this data in edit box? Is some date-time or calendar picker feasible? — it would provide you with the value of the structure in first place.

For example, look at this article:
DateTimePicker Web Control[^].

If you still want to get time from text, the conversion shown by Debata is correct.

When you have two instances of DateTime structure you can use operators "==", "!=" and ">", "<", ">=", "<=" in the sense "later", "earlier", "not earlier", "not later", respectively. Also, you can use subtraction operator ("-") which returns the result in the form of System.TimeSpan. This is a comprehensive set of operators to cover all your comparison needs.

—SA

Abdullatif M. Abu Al Rub · Accepted Answer · 2011-06-15T21:05:00

Solution 6

You should use "date time picker" control instead of text boxes this is more professional as a developer.

Posted 15-Jun-11 21:05pm

Abdullatif M. Abu Al Rub

Updated 15-Jun-11 21:13pm

v2

Comments

Dalek Dave 16-Jun-11 3:14am

Sage Advice, have a 5!

Abdullatif M. Abu Al Rub 18-Jun-11 3:50am

thanks

walterhevedeich 16-Jun-11 3:43am

My 5 too.

Abdullatif M. Abu Al Rub 18-Jun-11 3:50am

thanks too :)

Sergey Alexandrovich Kryukov 18-Jun-11 1:43am

Now I see where your notion of "professional" goes... :-)
As to the DateTimePicker -- you're absolutely right, wise advice, my 5.
--SA

Abdullatif M. Abu Al Rub 18-Jun-11 3:51am

=)

NDebata · Accepted Answer · 2011-06-15T20:47:00

Solution 1

DateTime fromdate = Convert.ToDateTime(TextBox1.Text);
DateTime todate = Convert.ToDateTime(TextBox2.Text);
if (todate.CompareTo(fromdate) < 0)
{
//add you logic
}

Posted 15-Jun-11 20:47pm

NDebata

Comments

CS2011 16-Jun-11 2:49am

Correct Answer.Have 5+

RakeshMeena 16-Jun-11 2:52am

5 from my side as well. You can as well use the static "Compare" method of the DateTime struct.

Sergey Alexandrovich Kryukov 16-Jun-11 2:59am

My 4. Conversion is correct, this is very good, but 1) CompareTo is not as good as operators, also "-" operator should be mentioned, 2) the whole idea of conversion is not so good, because -- why using TextBox where the user can make mistakes; DateTimePicker is much better.

Please see my solution.
--SA

Dalek Dave 16-Jun-11 3:12am

Well Done.

walterhevedeich · Accepted Answer · 2011-06-15T20:47:00

Solution 2

First, you need to convert the text to a DateTime value. From there, you can use DateTime.Compare[^] for this one. Check out the link.

Posted 15-Jun-11 20:47pm

walterhevedeich

Comments

CS2011 16-Jun-11 2:49am

Correct Answer. 5+

walterhevedeich 16-Jun-11 2:57am

Thanks.

Sergey Alexandrovich Kryukov 16-Jun-11 2:54am

My 4. Correct, but: 1) there more operations and operators are better, 2) conversion needs some explanation about formats, 3) conversion from string is not a good design, DateTimePicker is much better.
Please see my answer.
--SA

Sergey Alexandrovich Kryukov 16-Jun-11 2:57am

Conversion shown by NDebata is correct.
--SA

NDebata 16-Jun-11 3:11am

Thank you sir

Dalek Dave 16-Jun-11 3:12am

Good Answer.

walterhevedeich 16-Jun-11 3:44am

Thanks DD.

how can i compare the dates in C#.net

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