Properties

The significant properties for RadDateTimePicker are:

• Value: This is the date selected from the picker and can be set in code or from the drop down calendar in the Properties window.

Setting the value of RadDateTimePicker

this.radDateTimePicker1.Value = DateTime.Today.AddDays(1);

Me.RadDateTimePicker1.Value = DateTime.Now.AddDays(1)

• MinDate, MaxDate: These two dates form the bounds that dates can be selected from in the picker. Attempts to select outside these bounds are ignored. The example below sets the MinDate property to be the first day of the current month.

Setting the MinDate property of RadDateTimePicker

this.radDateTimePicker1.MinDate = DateTime.Today.AddDays(-DateTime.Today.Day);

Me.RadDateTimePicker1.MinDate = DateTime.Today.AddDays(-DateTime.Today.Day)

• NullText: This property defines the text that will be displayed in RadDateTimePicker when the NullableValue property is set to null and RadDateTimePicker is not in focus. By default, NullText is an empty string.

Setting the NullText property of RadDateTimePicker

this.radDateTimePicker1.NullText = "No date selected";

Me.RadDateTimePicker1.NullText = "No date selected"

• ShowTimePicker: this property determines the display of TimePicker in popup element of RadDateTimePicker.

this.radDateTimePicker1.DateTimePickerElement.ShowTimePicker = true;

Me.radDateTimePicker1.DateTimePickerElement.ShowTimePicker = True

• Format: The DateTimePickerFormat enumeration values are Long, Short, Time and Custom. Set Format to Custom to enable the CustomFormat property.

• CustomFormat: A format string that determines the display of the date in the picker edit. See the Internationalization and Date Formats topic for more information.

• Culture: Determines the language that the drop down calendar and text box will display.  See the Internationalization and Date Formats topic for more information.

• ThemeName: Sets the overall look of the control. Choose from a list of predefined themes or create your own using the Visual Style Builder available from the RadDateTimePicker's Smart Tag.

• CalendarSize: Gets or sets the size of the RadCalendar in the RadDateTimePicker drop-down.

• NullableValue is same as the Value property, but the NullableValue property is of type Nullable DateTime. It can be null – in this case if RadDateTimePicker is not selected, it will show its NullText. In case RadDateTimePicker is selected, it will show the last entered date – this allows the end-user to enter and edit the date.

Setting the NullableValue property of RadDateTimePicker

this.radDateTimePicker1.NullableValue = null;

Me.RadDateTimePicker1.NullableValue = Nothing

NullableValue can be bound to a business object that exposes a property of type nullable DateTime. The code below demonstrates how to do this:

Bind the NullableValue to a business object.

public class MyObject
{
    public MyObject(DateTime? _endTime)
    {
        this._endTime = _endTime;
    }
    private DateTime? _endTime;
    public DateTime? EndTime
    {
        get { return _endTime; }
        set { _endTime = value; }
    }
}
private BindingList<MyObject> myList;
protected override void OnLoad(EventArgs e)
{
    base.OnLoad(e);
    myList = new BindingList<MyObject>();
    myList.Add(new MyObject(null));
    myList.Add(new MyObject(DateTime.Now));
    myList.RaiseListChangedEvents = true;
    this.radDateTimePicker1.DataBindings.Add(new Binding("NullableValue", this.myList, "EndTime", true, DataSourceUpdateMode.OnPropertyChanged));
}

Public Class MyObject
    Public Sub New(ByVal _endTime? As Date)
        Me._endTime = _endTime
    End Sub
    Private _endTime? As Date
    Public Property EndTime() As Date?
        Get
            Return _endTime
        End Get
        Set(ByVal value? As Date)
            _endTime = value
        End Set
    End Property
End Class
Private myList As BindingList(Of MyObject)
Protected Overrides Sub OnLoad(ByVal e As EventArgs)
    MyBase.OnLoad(e)
    myList = New BindingList(Of MyObject)()
    myList.Add(New MyObject(Nothing))
    myList.Add(New MyObject(Date.Now))
    myList.RaiseListChangedEvents = True
    Me.RadDateTimePicker1.DataBindings.Add(New Binding("NullableValue", Me.myList, "EndTime", True, DataSourceUpdateMode.OnPropertyChanged))
End Sub

• Editing Time in RadDateTimePicker

To use RadDateTimePicker as date and time editor you need to enable the embedded TimePicker and set the desired mask that shows the time parts.

Enable the time picker.

this.radDateTimePicker1.DateTimePickerElement.ShowTimePicker = true;
this.radDateTimePicker1.Format = DateTimePickerFormat.Custom;
this.radDateTimePicker1.CustomFormat = "MMM - dd - yyyy hh:mm tt";
(this.radDateTimePicker1.DateTimePickerElement.CurrentBehavior as RadDateTimePickerCalendar).DropDownMinSize = new System.Drawing.Size(330, 250);

Me.radDateTimePicker1.DateTimePickerElement.ShowTimePicker = True
Me.radDateTimePicker1.Format = DateTimePickerFormat.[Custom]
Me.radDateTimePicker1.CustomFormat = "MMM - dd - yyyy hh:mm tt"
TryCast(Me.radDateTimePicker1.DateTimePickerElement.CurrentBehavior, RadDateTimePickerCalendar).DropDownMinSize = New System.Drawing.Size(330, 250)

See Also

• Design Time
• Free Form Date Time Parsing
• MaskDateTimeProvider
• Structure