Error in datetime variable

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1.50/5 (6 votes)

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C#

string carName = "";
DateTime dateFrom = "";

Is there any error?

Posted 2-Feb-14 1:43am

Member 10548723

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BillWoodruff 2-Feb-14 8:11am

What happens when you execute those two lines of code ?

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OriginalGriff · Answer 1 · 2014-02-02T02:31:00

Yes. Next!

Oh, you want more details? OK...
if you try to compile that, you will get an error:

Cannot implicitly convert type 'string' to 'System.DateTime'

Because you can't just assign a string to a DateTime any more than you can push a square peg in a round hole.
DateTime is not a string data type: it's a value which represents the number of milliseconds since and arbitrary point of time. Even if you wanted to assign a "blank" value to it, you can't, because just like integer it doesn't have a concept of "blank number" - it has a zero, just like integers do (DateTime.MinValue) but it doesn't have a "blank" value, so even if your tried the "proper" way to assign a string value to a DateTime by using DateTime.Parse or DateTime.ParseExact it would throw an exception if you tried to parse a blank string!

Think about what you are trying to achieve and there may be a better way to try and get there - but that isn't going to work!

Rahul VB · Answer 2 · 2014-02-02T04:06:00

I want you to observe the below stuff very keenly:

Quote:
string carName = "";
DateTime dateFrom = "";

Whats special in the below code??? Why does it compile???

Quote:
string carName = "";
DateTime dateFrom = DateTime.Parse("");

What if i do?

Quote:
DateTime dateFrom = Convert.ToDateTime("");

Last question:

What if you ask me 50$ and i give you 50Rs what is the difference?

Thanks

Maciej Los · Answer 3 · 2014-10-21T10:16:00

Solution 4

Start from reading MSDN documentation:
DateTime[^]
String[^]

Do not initiate string variable this way:
C#

string carName = "";

use:

C#

string carName = String.Empty();

To propery set datetime variable, use this:

C#

DateTime date1 = new DateTime(2008, 5, 1, 8, 30, 52);
//or
DateTime date3 = DateTime.Today;

Posted 21-Oct-14 10:16am

Maciej Los

Comments

Nelek 21-Oct-14 19:32pm

Wow, that can be named a big cache problem ;P

Maciej Los 22-Oct-14 2:33am

;)

Error in datetime variable

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