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How to show events in custom agenda view using list view in Xamarin.Forms Calendar?

Platform: Xamarin.Forms |
Control: SfCalendar

SfCalendar allows you to display the calendar events in custom AgendaView.

 

This article explains how to display the calendar events in custom AgendaView using list view.

 

Step 1: Set ShowInlineEvents to false to add the custom agenda view; it restricts the opening of default calendar inline view.

<syncfusion:SfCalendar x:Name="Calendar" ShowInlineEvents="false"/> 

Step 2: Bind the calendar events, namely StartTime, EndTime and Subject to text label to display the appointments in ListView as custom agenda view for calendar.

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:CustomListAgendaView"
             xmlns:syncfusion="clr-namespace:Syncfusion.SfCalendar.XForms;assembly=Syncfusion.SfCalendar.XForms" 
             x:Class="CustomListAgendaView.MainPage">
    <ContentPage.Resources>
        <ResourceDictionary>
            <local:DateTimeToStringConverter x:Key="stringConverter"/>
        </ResourceDictionary>
    </ContentPage.Resources>
    <ContentPage.Behaviors>
        <local:CalendarBehavior/>
    </ContentPage.Behaviors>
    <StackLayout Padding="0,30,0,0">
        <syncfusion:SfCalendar x:Name="Calendar" ShowInlineEvents="false" HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand"/>
        <ListView x:Name="ListView">
            <ListView.ItemTemplate>
                <DataTemplate>
                    <ViewCell>
                        <Grid>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="Auto"/>
                                <ColumnDefinition Width="*"/>
                            </Grid.ColumnDefinitions>
                            <StackLayout Orientation="Vertical" Grid.Column="0">
                                <Label Text = "{Binding StartTime, Converter={StaticResource stringConverter}}" FontSize="14" />
                                <Label Text="{Binding EndTime, Converter={StaticResource stringConverter}}" FontSize="14"/>
                            </StackLayout>
                            <StackLayout Orientation="Vertical" Padding="40,0,0,0" Grid.Column="1">
                                <Label Text = "{Binding Subject}" FontSize="20" FontAttributes="Bold" />
                            </StackLayout>
                        </Grid>
                    </ViewCell>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>
    </StackLayout>
</ContentPage>

By using the SelectionChanged event of SfCalendar, calendar events are bound to ListView ItemSource based on the date selected.

namespace CustomListAgendaView
{
    public class CalendarBehavior : Behavior<ContentPage>
    {
        private SfCalendar calendar;
        ListView listView;
        private CalendarEventCollection calendarInlineEvents;
        private ObservableCollection<string> meetingSubjectCollection;
        private ObservableCollection<Color> colorCollection;
        public CalendarBehavior()
        {
            calendarInlineEvents = new CalendarEventCollection();
            this.AddAppointmentDetails();
            this.AddAppointments();
        }
 
        protected override void OnAttachedTo(ContentPage bindable)
        {
            var page = bindable as Page;
            calendar = page.FindByName<SfCalendar>("Calendar");
            listView = page.FindByName<ListView>("ListView");
            calendar.SelectionChanged += Calendar_SelectionChanged;
            listView.ItemsSource = GetSelectedDateAppointments(DateTime.Now.Date);
            // Setting data source for 3 months.
            calendar.DataSource = calendarInlineEvents;
            base.OnAttachedTo(bindable);
        }
 
        protected override void OnDetachingFrom(ContentPage bindable)
        {
            calendar.SelectionChanged -= Calendar_SelectionChanged;
            base.OnDetachingFrom(bindable);
        }
 
        /// <summary>
        /// Calendars selection changed.
        /// </summary>
        /// <param name="sender">Sender.</param>
        /// <param name="e">E.</param>
        void Calendar_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            // Setting ItemSource for ListView based on appointment selection.
            listView.ItemsSource = GetSelectedDateAppointments(calendar.SelectedDate);
        }
 
        /// <summary>
        /// Gets the selected date appointments.
        /// </summary>
        /// <returns>The selected date appointments.</returns>
        /// <param name="date">Date.</param>
        public CalendarEventCollection GetSelectedDateAppointments(DateTime? date)
        {
            CalendarEventCollection selectedDateAppointments = new CalendarEventCollection();
            for (int i = 0; i < calendarInlineEvents.Count; i++)
            {
                DateTime startDate = calendarInlineEvents[i].StartTime;
 
                if (date.Value.Day == startDate.Day && date.Value.Month == startDate.Month && date.Value.Year == startDate.Year)
                {
                    selectedDateAppointments.Add(calendarInlineEvents[i]);
                }
            }
            return selectedDateAppointments;
        }
 
        /// <summary>
        /// Adds the appointment details.
        /// </summary>
        private void AddAppointmentDetails()
        {
            meetingSubjectCollection = new ObservableCollection<string>();
            meetingSubjectCollection.Add("General Meeting");
            meetingSubjectCollection.Add("Plan Execution");
            meetingSubjectCollection.Add("Project Plan");
            meetingSubjectCollection.Add("Consulting");
            meetingSubjectCollection.Add("Support");
            meetingSubjectCollection.Add("Development Meeting");
            meetingSubjectCollection.Add("Scrum");
            meetingSubjectCollection.Add("Project Completion");
            meetingSubjectCollection.Add("Release updates");
            meetingSubjectCollection.Add("Performance Check");
 
            colorCollection = new ObservableCollection<Color>();
            colorCollection.Add(Color.FromHex("#FFA2C139"));
            colorCollection.Add(Color.FromHex("#FFD80073"));
            colorCollection.Add(Color.FromHex("#FF1BA1E2"));
            colorCollection.Add(Color.FromHex("#FFE671B8"));
            colorCollection.Add(Color.FromHex("#FFF09609"));
            colorCollection.Add(Color.FromHex("#FF339933"));
            colorCollection.Add(Color.FromHex("#FF00ABA9"));
            colorCollection.Add(Color.FromHex("#FFE671B8"));
            colorCollection.Add(Color.FromHex("#FF1BA1E2"));
            colorCollection.Add(Color.FromHex("#FFD80073"));
            colorCollection.Add(Color.FromHex("#FFA2C139"));
            colorCollection.Add(Color.FromHex("#FFA2C139"));
            colorCollection.Add(Color.FromHex("#FFD80073"));
            colorCollection.Add(Color.FromHex("#FF339933"));
            colorCollection.Add(Color.FromHex("#FFE671B8"));
            colorCollection.Add(Color.FromHex("#FF00ABA9"));
        }
 
        /// <summary>
        /// Adds appointments.
        /// </summary>
        private void AddAppointments()
        {
            var today = DateTime.Now.Date;
            var random = new Random();
            for (int month = -1; month < 2; month++)
            {
                for (int day = -5; day < 5; day++)
                {
                    for (int count = 0; count < 2; count++)
                    {
                        var appointment = new CalendarInlineEvent();
                        appointment.Subject = meetingSubjectCollection[random.Next(7)];
                        appointment.Color = colorCollection[random.Next(10)];
                        appointment.StartTime = today.AddMonths(month).AddDays(random.Next(1, 28)).AddHours(random.Next(9, 18));
                        appointment.EndTime = appointment.StartTime.AddHours(2);
                        this.calendarInlineEvents.Add(appointment);
                    }
                }
            }
        }
    }
 
    /// <summary>
    /// Date time to string converter.
    /// </summary>
    public class DateTimeToStringConverter : IValueConverter
    {
        object IValueConverter.Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            DateTime dateTime = Convert.ToDateTime(value);
            return dateTime.ToString("hh:mm tt");
        }
 
        object IValueConverter.ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}

Sample link: https://github.com/SyncfusionExamples/how-to-show-events-in-custom-agenda-view-using-list-view-in-xamarin.forms-calendar

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