DateTime Null Variable Format

Question

I have a variable that receives DATETIME type ,And sometimes comes from DB NULL variable So I have this code .

DateTime? d;
DateTime dtq; 
don.Date_appeal_donor= d = DateTime.TryParse(dr["Date_"].ToString(), out dtq) ? dtq : (DateTime?)null;

And I can not change the format to "dd / MM / yyyy" Does anyone have a solution?

You're right, now I realized that only when it comes to DATAGRIDVIEW It changes the display This is in wpf. So I fill the data grid

  dataGrid1.ItemsSource= DAL.LoadCollectionData();

And here I am stuck

I assume that dr["Date_"] actually already is a DateTime variable, why do you convert it then first to a String and then try-parse it back to a DateTime? — Tim Schmelter
– Tim Schmelter, Commented Jun 25, 2012 at 10:24

Kristof Claes · Accepted Answer · 2012-06-25 10:32:44Z

1

You can use DateTime.TryParseExact like this:

DateTime dtq;
DateTime? d;

don.Date_appeal_donor = d = DateTime.TryParseExact(dr["Date_"].ToString(), "dd/MM/yyyy", null, DateTimeStyles.None, out date) ? dtq : (DateTime?)null;

answered Jun 25, 2012 at 10:32

Kristof Claes

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