CODEWITHSUNDEEP
c#
IlDrugo
IlDrugo

Reputation: 2069

How to create a Nullable DateTime in Settings?

I need to create a System.DateTime in the settings of my application, now if the field isn't valorized I get this date:

01/01/0001 00:00:00

trying to access as: Properties.Settings.Default.LastUpdated;

I need to compare the value and check if is null. Now the problem is that if the date isn't setted I'll get the value above.

How can I fix this?

Upvotes: 1

Views: 1767

Answers (2)

Olivier Citeau
Olivier Citeau

Reputation: 169

DateTime is a struct, so it is a value type not a reference type. As such, it is not nullable.

You may use DateTime.MinValue instead.

if (Properties.Settings.Default.LastUpdated==DateTime.MinValue)
...

Upvotes: 3

Robert
Robert

Reputation: 2533

If you are never going to use that date than you can put it in a global constant variable and name that variable DateNull. After that just compare them. You can even use nullable types since DateTime is value type so you can have

DateTime? myDate;

If you make a condition like this

if(myDate == null)

it would evaluate to true.

Upvotes: 0

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