Setting the Date Time Picker to blank or 0 value

Question

I have this form right here, where the user will add the start date of the diagnosis. pretty simple right? but in the end diagnosis how would I set it to a blank? or 0 value? here's my form. enter image description here

Could you show the code? Hint though would be to use Nullable DateTime? so it can store null. DateTime is a value object and therefore cannot store null — James Kyburz, Mar 25 '12 at 14:21
In my database, the data type is only date. I mean in the UI how would set their initial values to null or 0? it will have a value if the user clicks it. — user962206, Mar 25 '12 at 14:23
possible duplicate of [DateTimePicker Null Value (.NET)](http://stackoverflow.com/questions/284364/datetimepicker-null-value-net) — bluish, Nov 13 '13 at 08:38

score 4 · Accepted Answer · answered Mar 25 '12 at 14:23

4

The best you can do is to set ShowCheckBox to true. If the CheckBox is not checked, consider that no end date is set.

answered Mar 25 '12 at 14:23

Thomas Levesque

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end date is set = 0? or null? – user962206 Mar 25 '12 at 14:27
No, the `Value` property is still set to a valid date. You need to test the `Checked` property to decide if you want to use the date or not. – Thomas Levesque Mar 25 '12 at 14:28

score 2 · Answer 2 · edited Nov 24 '13 at 00:12

2

i think, it is not possible to set it as blank or 0 value.. the least you can do is to set it in its MinDate if it's null..

this one works for me..

 dateTimePicker1.Format = DateTimePickerFormat.Custom;

 dateTimePicker1.CustomFormat = " ";

edited Nov 24 '13 at 00:12

Qantas 94 Heavy

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answered Mar 28 '12 at 08:18

rutchel

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score 1 · Answer 3 · answered Mar 25 '12 at 14:22

1

you don't want it to be set to 0. It makes no sense (1/1/01 ? most of DB doesn't event store this date)

You should put it either the same as start or in a reasonable margin which describe the common scenario (like + 2 weeks)

answered Mar 25 '12 at 14:22

Dani

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score 0 · Answer 4 · answered Nov 23 '13 at 23:53

0

try to use

dateTimePicker1.Value.Date

It would return you only date

answered Nov 23 '13 at 23:53

Mujassir Nasir

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This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post. – Qantas 94 Heavy Nov 24 '13 at 00:13

score 0 · Answer 5 · answered Aug 17 '17 at 20:52

All solved now just had to adjust. As what you guys were saying i wasn't setting the value or the properties so it would all ways be null anyway

private string _BirthDate;

        public Form1()
        {
            InitializeComponent();
            dateTimePicker1.MaxDate = DateTime.Now; // Ensures no future dates are set.
            dateTimePicker1.Format = DateTimePickerFormat.Custom;
            //dateTimePicker1.Checked = true;
            dateTimePicker1.CustomFormat = dateTimePicker1.CustomFormat;
            dateTimePicker1.Value = DateTime.Now;
        }
        public string BirthDate
        {
            set
            {
                if (dateTimePicker1.Value.Date == DateTime.Today)
                {
                    dateTimePicker1.CustomFormat = " ";

                }
                else
                {
                    _BirthDate = value;
                }
            }
            get { return _BirthDate; }
        }


        private void button1_Click(object sender, EventArgs e)
        {

           BirthDate = dateTimePicker1.Value.ToString();
        }

score 0 · Answer 6 · answered Mar 25 '12 at 14:23

0

Try setting the Value property. However I think there is a limit on how far back you can set the value.

answered Mar 25 '12 at 14:23

Devin M

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I want the datetime picker to display blank. or a null value how can I achieve that? – user962206 Mar 25 '12 at 14:27
You cant null the date value you could only set it to a date far in the past. See Thomas Levesque's answer about placing a check box next to the date, that might get you what you want. – Devin M Mar 25 '12 at 14:29

score 0 · Answer 7 · answered Mar 25 '12 at 16:26

0

You can put an external checkbox and disable the datetimepicker when you wish to signify no-date.

answered Mar 25 '12 at 16:26

Alex

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Setting the Date Time Picker to blank or 0 value

7 Answers7