`Calendar`

This allows the user to select a day. As with the similar DatePicker control, we access the SelectedDate property. We use the SelectedDatesChanged event.

Drag a Calendar control the WPF window. Press tab and Visual Studio inserts the event handler (Calendar_SelectedDatesChanged). This runs when a date is selected.

Example code

In this C# method, we cast the "sender" object to a Calendar reference with an as-cast. The SelectedDate property returns a nullable DateTime.

And We use the HasValue property on the nullable type to determine whether the inner DateTime exists or not.

Then We get a reference to the DateTime indicated by the Calendar at this point. We call ToShortDateString on it.

<Window x:Class="WpfApplication21.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Calendar
            HorizontalAlignment="Left"
            Margin="10,10,0,0"
            VerticalAlignment="Top"
            SelectedDatesChanged="Calendar_SelectedDatesChanged"/>
    </Grid>
</Window>using System;
using System.Windows;
using System.Windows.Controls;

namespace WpfApplication21
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Calendar_SelectedDatesChanged(object sender,
            SelectionChangedEventArgs e)
        {
            // ... Get reference.
            var calendar = sender as Calendar;

            // ... See if a date is selected.
            if (calendar.SelectedDate.HasValue)
            {
                // ... Display SelectedDate in Title.
                DateTime date = calendar.SelectedDate.Value;
                this.Title = date.ToShortDateString();
            }
        }
    }
}

The Calendar control displays a month-based calendar. One important event is SelectedDatesChanged—with it, we can detect when the user selects a day within the control.