CalendarControlBase.AddSelection(DateTime, DateTime) Method

Adds the specified date range to the selection.

Namespace: DevExpress.XtraEditors.Controls

Assembly: DevExpress.XtraEditors.v25.2.dll

NuGet Package: DevExpress.Win.Navigation

Declaration

C#

public virtual void AddSelection(
    DateTime start,
    DateTime end
)

VB.NET

Public Overridable Sub AddSelection(
    start As Date,
    end As Date
)

Parameters

Name	Type	Description
start	DateTime	The first date of a range (this date is included in the range)
end	DateTime	The last date of a range (this date is NOT included in the range).

Remarks

In multi-selection mode (see CalendarControlBase.SelectionMode), the AddSelection method allows you to select certain dates. Use the CalendarControlBase.SelectedRanges property to access the current selection.

The following code snippet adds a date range to the selection on a button click:

C#

using DevExpress.XtraEditors;
using DevExpress.XtraEditors.Repository;

namespace tileItemSize {
    public partial class Form1 : XtraForm {
        public Form1() {
            InitializeComponent();
            // Activate multiple selection
            calendarControl1.SelectionMode = CalendarSelectionMode.Multiple;

            // Add a selection range on a button click
            btnAddSelection.Click += (s, e) =>
            {
                calendarControl1.AddSelection(new DateTime(2026, 2, 16), new DateTime(2026, 2, 22));
            };
        }
    }
}

VB.NET

Imports DevExpress.XtraEditors
Imports DevExpress.XtraEditors.Repository

Namespace tileItemSize
    Public Partial Class Form1
        Inherits XtraForm

        Public Sub New()
            InitializeComponent()
            ' Activate multiple selection
            calendarControl1.SelectionMode = CalendarSelectionMode.Multiple

            ' Add a selection range on a button click
            AddHandler btnAddSelection.Click, Sub(s, e)
                Dim range As New DateRange()
                calendarControl1.AddSelection(new DateTime(2026, 2, 16), new DateTime(2026, 2, 22))
            End Sub
        End Sub
    End Class
End Namespace