CalendarControlBase.AddSelection(DateRange) 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(
    DateRange range
)

VB.NET

Public Overridable Sub AddSelection(
    range As DateRange
)

Parameters

Name	Type	Description
range	DevExpress.XtraEditors.Controls.DateRange	The range to be added to the selection. The object specifies dates that lie in the range between the DateRange.StartDate (including this date) and the DateRange.EndDate (excluding this date).

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.Controls;
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) =>
            {
                DateRange range = new DateRange();
                range.StartDate = new DateTime(2026, 2, 16);
                range.EndDate = new DateTime(2026, 2, 22);
                calendarControl1.AddSelection(range);
            };
        }
    }
}

VB.NET

Imports DevExpress.XtraEditors
Imports DevExpress.XtraEditors.Controls
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()
                range.StartDate = New DateTime(2026, 2, 16)
                range.EndDate = New DateTime(2026, 2, 22)
                calendarControl1.AddSelection(range)
            End Sub
        End Sub
    End Class
End Namespace