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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 .ConfigureNullableDateTimePicker() element to the MauiProgram.cs file in your project.

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

Usage 1: Use DateTimePicker as ContentView control (With input field and icon)

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

xmlns:ndtp="clr-namespace:Maui.NullableDateTimePicker;assembly=Maui.NullableDateTimePicker"

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.

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

1- Add your entry and button for datetime in your xaml page (eg. MainPage.xaml)

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 calendar 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

DateTimePicker Calendar options

Option	Description	Default Value
NullableDateTime	Gets or sets the nullable date and time value of the control.	null
Mode	Specifies the picker mode of the control. Valid values are Date, DateTime, and Time.	Date
MinDate	Minimum selectable date of the control.	DateTime.MinValue
MaxDate	Maximum selectable date of the control.	DateTime.MaxValue
OkButtonText	The text for the OK button.	OK
CancelButtonText	The text for the Cancel button.	Cancel
ClearButtonText	Gets or sets the text for the Clear button.	Clear
ShowClearButton	Clear button can be hidden/shown. If true, the button is displayed.	true
HeaderForeColor	Gets or sets the foreground color of the control's header.	White
HeaderBackgroundColor	Background color of the calendar's header.	#2b0b98
ForeColor	It is used for the color of texts that cannot be styled in the calendar.	Dark:White, Light:Black
BodyBackgroundColor	Background color of the calendar.	White
ToolButtonsStyle	Style of the control's tool buttons.	null
DayStyle	Style of the days in the calendar.	null
SelectedDayStyle	Style of the selected day in the calendar.	null
DayNamesStyle	Style of the day names in the calendar.	null
OtherMonthDayStyle	Style of the other month days in the calendar.	null
DisabledDayStyle	Style of the disabled days in the calendar.	null
WeekNumberStyle	Style of the week numbers in the calendar.	null
ShowWeekNumbers	Determines whether to display week numbers in the calendar.	false
ShowOtherMonthDays	Determines whether to display other month days in the calendar.	true
Is12HourFormat	Determines whether to display the am/pm picker for the 12-hour format.	false

Datetimepicker Input Options (If NullableDateTimePicker is used as ContentView)

Option	Description	Default Value
Format	Specifies the display format for the date or time.	for date: d, for datetime: g, for time: t
BackgroundColor	Background color of the datetimepicker control.	White
Icon	Imagesource for the icon.	null
TextColor	Text color of the entry.	Black
FontFamily	Font family of the entry.	Arial
FontSize	Font size of the entry.	14
BorderColor	Border color of the datetimepicker control	none
BorderWidth	Border width of the control	0
CornerRadius	Corner radius of the control	0
PlaceHolder	Placeholder of the entry	empty

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>

.NET MAUI handler was used in the test project to remove the underline in the original entry. Please refer to the MauiProgram.cs file in the sample project. For more detailed information about handlers, please check: https://learn.microsoft.com/en-us/dotnet/maui/user-interface/handlers/customize?view=net-maui-8.0

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

DateTimePicker

Changelog

2.3.1

Fixed issue: Icons displayed inconsistently

2.3.0

Setting TextColor had no effect.
FontFamily added.
Fixed am/pm picker issue in windows

2.2.0

12 hour format added (AM/PM picker)
Time icon fixed
The calendar can also be opened by clicking on the entry.
In time picker, only time is shown in the header
Various improvements.

2.1.0

Fixed: Content is already a child of Microsoft.Maui.Controls.ContentPage.
Fixed: When the months were changed in Windows, the application would hang.

2.0.0

Layout adjustments
Fixed: The months list was opening in Time mode.
If the months list is open, the year changes with the next/previous button.
Default height: 40
Net 8.0 compatibility

1.2.0

Months can be quickly selected from the list.
MinDate and MaxDate validations have been reviewed and revised.
A border and CornerRadius has been added to the datetimepicker control.

1.1.1

The .NET MAUI Communitytoolkit version (6.1.0) was added to the project.
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.