how to set datetimepicker with null value if date not selected(c# winforms)

Question

Binding b = new Binding( \"Value\", person, \"BdayNullable\", true );
dtBirthdayNullable.DataBindings.Add( b );
b.Format += new ConvertEventHandler( dtBirthdayNullab         


        

Answer 1

I like the ShowCheckBox option. I would take it one step further and encapsulate it with two extension methods to avoid duplication and have cleaner looking code:

public static DateTime? NullableValue(this DateTimePicker dtp)
{
    return dtp.Checked ? dtp.Value : (DateTime?)null;
}

public static void NullableValue(this DateTimePicker dtp, DateTime? value)
{
    dtp.Checked = value.HasValue;
    if (value.HasValue) dtp.Value = value.Value;
}

Then, the get and set code looks like:

dtpSafetyApprover.NullableValue(model.SafetyApproverDate); // set
model.SafetyApproverDate = dtpSafetyApprover.NullableValue(); // get