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Null Value In DateTmePicker

Posted on 2001-08-03
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Last Modified: 2010-04-06
Hey all,

How do I display no values in the DateTimePicker when the user hasn't entered/selected a date?

When I bring up a new entry screen, all the DateTimePicker dates show the date the component was placed on the form. I don't want it to show anything unless data has been entered.

Thanks,
Chad
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Question by:dhertzfe
6 Comments
 
LVL 22

Expert Comment

by:Mohammed Nasman
ID: 6351302
Hello

  I think you need to override the a method, maybe CheckEmptyDate, but i'm not sure

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Author Comment

by:dhertzfe
ID: 6352280
Hi mnasman,

There is no method like that for TDateTimePicker.


Chad
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LVL 22

Expert Comment

by:Mohammed Nasman
ID: 6352716
it's protected method for the TDateTimePicker
Prss Control while u move the move above TDateTimePicker, so when u see it in blue color, click on it, and u will see the source of that control, here's some source of the ComCtrls.pas, that contain all the declartion of TDateTimePicker class

 TDateTimePicker = class(TCommonCalendar)
  private
    FCalAlignment: TDTCalAlignment;
    FChanging: Boolean;
    FChecked: Boolean;
..
..
  protected
    procedure CheckEmptyDate; override;
    procedure CreateParams(var Params: TCreateParams); override;
    procedure CreateWnd; override;
    procedure Change; dynamic;
..

Best regards
Mohammed
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Author Comment

by:dhertzfe
ID: 6353232
Hi Mohammed,

I'm using Delphi 6....and I did what you said in the designer on my form with the TDateTimePicker and I didn't see what you where talking about.

How would I write the code to override CheckEmptyDate method to not display the date unless there was a value entered by the user or read from a record?

Thanks,
Chad
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LVL 26

Expert Comment

by:Russell Libby
ID: 8735385
No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question is:

To be PAQ/Refund

Please leave any comments here within the next seven days.
 
PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!
 
Thank you,
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Per recommendation,

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