Set DateTimePicker value to be null

by

I think the best solution is to use the build-in checkbox that tell the user if a value is specified or not.

Set the control property ShowCheckBox = true

When you bind the value to it do something like

 if (value == DateTime.MinValue) {
    datePicker.Checked = false;
  } else {
    datePicker.Checked = true;
    datePicker.Value = value;
  }

When reading back the value check the Checked property.

If you don’t like the displayed value when it’s unchecked, you can combine that with the other suggestions.

  if (!datePicker.Checked) {
    // hide date value since it's not set
    datePicker.CustomFormat = " ";
    datePicker.Format = DateTimePickerFormat.Custom;
  } else {
    datePicker.CustomFormat = null;
    datePicker.Format = DateTimePickerFormat.Long; // set the date format you want.
  }

More Related Contents:

  1. DateTimePicker: pick both date and time
  2. How do I disable some dates on a DateTimePicker control?
  3. Interaction between forms — How to change a control of a form from another form?
  4. How to access a form control for another form?
  5. Changing the user agent of the WebBrowser control
  6. How do I drag and drop files into an application?
  7. ‘UserControl’ constructor with parameters in C#
  8. How to hide only the Close (x) button?
  9. How to handle click event in Button Column in Datagridview?
  10. How do you pass an object from form1 to form2 and back to form1?
  11. Force GUI update from UI Thread
  12. How do I execute code AFTER a form has loaded?
  13. Opening a “known file type” into running instance of custom app – .NET
  14. How to set selected value from Combobox?
  15. How to access form methods and controls from a class in C#?
  16. AutoComplete TextBox Control
  17. Mute Windows Volume using C#
  18. Raise an event when I hover the mouse over a ComboBox item
  19. How do I center a window on the screen in C# & WinForms?
  20. Windows Forms application like Google Chrome with multiple processes
  21. Custom browsable property for Form at design time
  22. Prevent AutoSelect behavior of a System.Window.Forms.ComboBox (C#)
  23. Create custom shape for button
  24. Auto-width of ComboBox’s content
  25. Get cursor position with respect to the control – C#
  26. How can I show a tooltip on a disabled button?
  27. How to get the screenshot of the form
  28. DataGridView bound to BindingList does not refresh when value changed
  29. How to catch a key press on a C# .NET form
  30. Open Form2 from Form1, close Form1 from Form2

Leave a Comment