Concat a DateTime

Question

On a wpf application i have a DatePicker, and, a TimePicker ( from the Extended WPF Toolkit). These two contrôls return a DateTime Value.

I would like to store the result of this two control in a one DateTime variable.

I tried :

myNewEvenement.dDate = DateTimePicker_Date.SelectedDate.Value;
myNewEvenement.dDate += (DateTime)TimePicker_Heure.Value;

But i cannot compile this code.

Any idea please ?

Thanks a lot

Sergey Berezovskiy · Answer 1 · 2013-03-13T15:12:12.243

1

Use DateTime.Add(TimeSpan value) method to create new DateTime object (you can't change value of existing DateTime struct, because it is immutable):

myNewEvenement.dDate = DateTimePicker_Date.SelectedDate.Value.Value
                           .Add(TimePicker_Heure.Value.Value.TimeOfDay);

Or more readable:

DateTime date = DateTimePicker_Date.SelectedDate.Value.Value;
TimeSpan time = TimePicker_Heure.Value.Value.TimeOfDay;
myNewEvenement.dDate = date.Add(time);

edited Mar 13 '13 at 15:12

answered Mar 13 '13 at 14:56

Sergey Berezovskiy

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I don't have a TimeOfDay property on a TimePicker :( – Walter Fabio Simoni Mar 13 '13 at 15:02
@WalterFabioSimoni that is a property of TimePicker.Value (which is DateTime) – Sergey Berezovskiy Mar 13 '13 at 15:03
Yes but i don't have the .TimeOfDay on TimePicker.Value – Walter Fabio Simoni Mar 13 '13 at 15:05
I need to use Value twice ! TimePicker_Heure.Value.Value.TimeOfDay – Walter Fabio Simoni Mar 13 '13 at 15:06
@WalterFabioSimoni I thought TimePicker.Value has type `DateTime`. Is it `Nullable`? If yes, then you are right. Use `TimePicker_Heure.Value.Value.TimeOfDay` – Sergey Berezovskiy Mar 13 '13 at 15:10

score 1 · Answer 2 · answered Mar 13 '13 at 14:57

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The TimePicker's Value is a DateTime. Since you want to add the time to the date, simply add the TimeOfDay property of the time picker's value when adding, such as:

myNewEvenement.dDate = DateTimePicker_Date.SelectedDate.Value;
myNewEvenement.dDate += TimePicker_Heure.Value.TimeOfDay;

answered Mar 13 '13 at 14:57

Fls'Zen

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I don't have a TimeOfDay property on a TimePicker.Value :( – Walter Fabio Simoni Mar 13 '13 at 15:04
The Extended WPF Toolkit documetation says that `TimePicker_Heure.Value` is a `DateTime`, and a `DateTime` instance has a `TimeOfDay` property. – Fls'Zen Mar 13 '13 at 15:56

score 1 · Answer 3 · edited May 23 '17 at 12:11

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DateTime is a struct, hence it is immutable. You can create a new DateTime by using DateTime.Add with the appropriate TimeSpan:

long ticks = ((DateTime)TimePicker_Heure.Value).Ticks;
TimeSpan ts = TimeSpan.FromTicks(ticks);
myNewEvenement.dDate = myNewEvenement.dDate.Add(ts);

or directly via DateTime.AddTicks

myNewEvenement.dDate = myNewEvenement.dDate.AddTicks(ticks);

edited May 23 '17 at 12:11

Community

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answered Mar 13 '13 at 14:59

Tim Schmelter

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Concat a DateTime

3 Answers3