Sebarslan.Maui.NullableDateTimePicker 1.1.1

Maui Nullable and Clearable DateTimePicker

The Nullable DateTimePicker is a custom calendar control for selecting a nullable date and time value in a .NET MAUI application. It provides a consistent and platform-independent user interface for selecting dates, and allows the user to clear the value if needed.

This control uses the <a href="https://github.com/CommunityToolkit/Maui" target="_blank">CommunityToolkit.Maui</a> Popup.

Usage

To use the Nullable DateTimePicker control in your .NET MAUI application, follow these steps:

0- Add the Sebarslan.Maui.NullableDateTimePicker nuget package to your project and add the .UseMauiCommunityToolkit() element to the MauiProgram.cs file in your project.

<pre> <code> public static MauiApp CreateMauiApp() { var builder = MauiApp.CreateBuilder(); builder.UseMauiApp<App>(); .UseMauiCommunityToolkit() .... </code> </pre>

Usage 1: Use DateTimePicker as ContentView control

1- Add the NullableDateTimePicker control to your XAML layout file:

xmlns:ndtp="clr-namespace:Maui.NullableDateTimePicker;assembly=Maui.NullableDateTimePicker" <pre> <code> <ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" xmlns:ndtp="clr-namespace:Maui.NullableDateTimePicker;assembly=Maui.NullableDateTimePicker" x:Class="Maui.NullableDateTimePicker.Samples.MainPage"> </code> </pre>

2- And add the following code to the place where you want to use DateTimePicker and then connect the NullableDateTime property with the Datetime Property in your ViewModel. <pre> <code> <ndtp:NullableDateTimePicker NullableDateTime="{Binding MyDateTime}" Mode="Date" /> </code> </pre>

Usage 2: Use direct calendar popup with your own entry and button

1- Add your entry or button for datetime in your xaml page (eg. MainPage.xaml) <pre> <code> <HorizontalStackLayout HorizontalOptions="Fill" HeightRequest="40"> <Entry x:Name="DateTimeEntry" Text="{Binding MyDateTime, StringFormat='{0:g}'}" HorizontalOptions="Fill" VerticalOptions="Fill" IsReadOnly="True"> <Entry.GestureRecognizers> <TapGestureRecognizer Tapped="DateTimePicker_Clicked" /> </Entry.GestureRecognizers> </Entry> <ImageButton Source="{Binding CalendarIcon}" Clicked="DateTimePicker_Clicked" HorizontalOptions="Fill" VerticalOptions="Fill" Margin="0" Padding="2" WidthRequest="30" /> </HorizontalStackLayout> </code> </pre>

2- Then, when you click on the button or entry, define the options and call NullableDateTimePicker.OpenCalendarAsync(options) to open the calendar in your xaml.cs file. (eg. MainPage.xaml.cs) <pre> <code> private async void DateTimePicker_Clicked(object sender, EventArgs e) { INullableDateTimePickerOptions nullableDateTimePickerOptions = new NullableDateTimePickerOptions { NullableDateTime = MyDateTime, Mode = PickerModes.DateTime, ShowWeekNumbers = true // .. other options };

var result = await NullableDateTimePicker.OpenCalendarAsync(nullableDateTimePickerOptions);
if (result is PopupResult popupResult && popupResult.ButtonResult != PopupButtons.Cancel)
{
    MyDateTime = popupResult.NullableDateTime;
    // DateTimeEntry.Text = popupResult.NullableDateTime?.ToString("g"); //If you are not using ViewModel
}

} </code> </pre>

More examples, please see the samples project

Options

Other Options for ContentView Control

NullableDateTimeChanged Event (If NullableDateTimePicker is used as ContentView)

The NullableDateTimeChanged event is used to indicate when a NullableDateTime value has been changed. This event is commonly used in programming or software environments and is triggered when the NullableDateTime value is modified.

The event utilizes the DateTimeChangedEventArgs class as its argument. The DateTimeChangedEventArgs class contains additional information that is carried at the moment the event is triggered. It may include details about the date and time change, such as the old DateTime value and the new DateTime value.

Below is an example code snippet illustrating the usage of the "NullableDateTimeChanged" event and the "DateTimeChangedEventArgs" argument class: <pre> <code> NullableDateTimePicker dateTimePicker = new NullableDateTimePicker(); dateTimePicker.NullableDateTimeChanged += OnNullableDateTimeChanged;

private static void OnNullableDateTimeChanged(object sender, DateTimeChangedEventArgs e) { Console.WriteLine("DateTime changed!"); Console.WriteLine("Old DateTime: " + e.OldDateTime); Console.WriteLine("New DateTime: " + e.NewDateTime); } </code> </pre>

License

The Nullable DateTimePicker control is licensed under the MIT License. See <a href="LICENSE.txt">LICENSE file</a> for more information.

Contributing

Contributions are welcome!

Screenshot

on ios, android, windows

Changelog

1.1.1.

• Communitytoolkit developers released a new version (6.1.0) and this new version was added to the project NullableDateTimePicker
• Updated the week number logic to align with ISO 8601 standards.
• Bug fixed: When going back from the 1st month, the year was also decreased.

1.1.0

• The calendar popup can be opened directly via the NullableDateTimePicker, so you can use your own entry and button.
• On some screens, week and day numbers were not displayed on the same line.
• Dark theme adjusted
• Various bugs fixed

1.0.2

• The problem of displaying the default icon in default mode has been fixed.

• Various improvements.

1.0.1

• The problem of not setting the margin has been fixed.