Hi,
What's the correct code for checking if a DateTime control is empty or not
filled in with a date?
Thanks,
JJ
7  3835 
JJ <JJ@discussions.microsoft.com> wrote: What's the correct code for checking if a DateTime control is empty
or not filled in with a date?
Not sure what you mean by a DateTime control, as DateTime *isn't* a
control - however, there's no concept of a DateTime not being filled
in, any more than there is a concept of an int not being filled in. You
*may* be able to use a special value (eg DateTime.MinValue) as "not
provided" depending on your application.
Alternatively, you could encapsulate the DateTime in a reference type.
--
Jon Skeet - <sk***@pobox.com> http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
Or, you could wait for v2.0 of the Framework, at which point you can
use "DateTime?"
ok the DateTimePicker Control is what i'm using if u want to get technical
about it.
I want to know if someone has not entered a date into it.
JJ
"Jon Skeet [C# MVP]" wrote: JJ <JJ@discussions.microsoft.com> wrote: What's the correct code for checking if a DateTime control is empty
or not filled in with a date?
Not sure what you mean by a DateTime control, as DateTime *isn't* a
control - however, there's no concept of a DateTime not being filled
in, any more than there is a concept of an int not being filled in. You
*may* be able to use a special value (eg DateTime.MinValue) as "not
provided" depending on your application.
Alternatively, you could encapsulate the DateTime in a reference type.
--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
Incidentally, how would you set the value to null in the first place? I
would recommend that you handle the click or valuechanged event to indicate
user interaction.
BTW: The venerable Mr. Skeet was exactly right in pointing you towards
reference type, not to mention that he similar to the C# forum what
Alexander, Kim, Brian, and Igor are to the ATL forum (sorry
gurus-not-mentioned, I'm very bad on names). Suggesting that a person is
being too technical in a technical forum may be ill-received by some people.
Best regards.
HTH,
mk
"JJ" wrote: ok the DateTimePicker Control is what i'm using if u want to get technical
about it.
I want to know if someone has not entered a date into it.
JJ
"Jon Skeet [C# MVP]" wrote:
JJ <JJ@discussions.microsoft.com> wrote: What's the correct code for checking if a DateTime control is empty
or not filled in with a date?
Not sure what you mean by a DateTime control, as DateTime *isn't* a
control - however, there's no concept of a DateTime not being filled
in, any more than there is a concept of an int not being filled in. You
*may* be able to use a special value (eg DateTime.MinValue) as "not
provided" depending on your application.
Alternatively, you could encapsulate the DateTime in a reference type.
--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
What I meant was there is a datetimepicker control. Sorry for leaving off the
picker part but I figured most people would know that I'm probably talking
about the datetimepicker control.
"mk" wrote: Incidentally, how would you set the value to null in the first place? I
would recommend that you handle the click or valuechanged event to indicate
user interaction.
BTW: The venerable Mr. Skeet was exactly right in pointing you towards
reference type, not to mention that he similar to the C# forum what
Alexander, Kim, Brian, and Igor are to the ATL forum (sorry
gurus-not-mentioned, I'm very bad on names). Suggesting that a person is
being too technical in a technical forum may be ill-received by some people.
Best regards.
HTH,
mk
"JJ" wrote:
ok the DateTimePicker Control is what i'm using if u want to get technical
about it.
I want to know if someone has not entered a date into it.
JJ
"Jon Skeet [C# MVP]" wrote:
JJ <JJ@discussions.microsoft.com> wrote:
> What's the correct code for checking if a DateTime control is empty
> or not filled in with a date?
Not sure what you mean by a DateTime control, as DateTime *isn't* a
control - however, there's no concept of a DateTime not being filled
in, any more than there is a concept of an int not being filled in. You
*may* be able to use a special value (eg DateTime.MinValue) as "not
provided" depending on your application.
Alternatively, you could encapsulate the DateTime in a reference type.
--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
JJ <JJ@discussions.microsoft.com> wrote: What I meant was there is a datetimepicker control. Sorry for leaving off the
picker part but I figured most people would know that I'm probably talking
about the datetimepicker control.
As far as I can see, a DateTimePicker is filled with the current
date/time until the user chooses something, so there's no concept of
"null" there either.
--
Jon Skeet - <sk***@pobox.com> http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
On Wed, 11 May 2005 13:59:15 -0700, JJ wrote: What I meant was there is a datetimepicker control. Sorry for leaving off the
picker part but I figured most people would know that I'm probably talking
about the datetimepicker control.
With the standard DateTimePickerControl a user does not have the
possibility to enter no date. So you always have a valid DateTime value in
the DateTimePickerControl.
If you need a DateTimePickerControl that allows the user to empty the
control, have a look at this solution: http://www.codeproject.com/cs/miscct...TimePicker.asp
--
Claudio Grazioli http://www.grazioli.ch http://www.grazioli.ch/HommingbergerGepardenforelle/ This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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