How to allow the null value in the Date And time

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Hi all I import the excel 1 sheet in data grid view. In the excel file having Records in date and time format, if any cell of record is null how to save the record, while I am save the record it’s showing the Error “String was not recognized as a valid Date Time”

Posted 4-Feb-13 21:27pm

DhananjayanP

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Comments

Zoltán Zörgő 5-Feb-13 3:35am

You can use nullable variable - but it depends on your code. Please improve your question by adding the code row(s) you use to read the datetime value from the cell.

lukeer 5-Feb-13 4:34am

Don't repost the same question[^] again. Use the original question's "Improve question" link instead to provide further insight. That way, you will have all answers in one thread. And potential helpers don't have to waste their time on answers you already got.

4 solutions

Solution 2

The easiest option would be to use a nullable type[^].
E.g. DateTime? dt = null;

Here[^] is a good example.

However, you will need to make sure you check this value for null before display.

Posted 4-Feb-13 21:46pm

Abhinav S

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Ankur^\m/ 5-Feb-13 3:52am

Correct!

Abhinav S 5-Feb-13 4:19am

Thanks.

Solution 3

C# does support Nullable DateTime[^]

C#

DateTime? MyNullableDate = null;

is a valid statement.

Posted 4-Feb-13 21:48pm

Ankur^\m/

Comments

Ankur^\m/ 5-Feb-13 3:51am

Couple of answers came in while I was typing mine. :0

Abhinav S 5-Feb-13 4:19am

5. Of course.

Solution 4

See Use Nullable Types![^]

Cheers,
Edo

Posted 4-Feb-13 22:51pm

Joezer BH

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Jameel VM · Accepted Answer · 2013-02-04T21:43:00

Solution 1

Initialize Your DateTime property like below

C#

public DateTime? Date{get;set;}

Hope this helps

Posted 4-Feb-13 21:43pm

Jameel VM

Comments

Ankur^\m/ 5-Feb-13 3:52am

Should have also mentioned that it is called nullable type. Anyways 5!

Abhinav S 5-Feb-13 4:22am

Yes that is correct.