[Android] DatePicker does not update MinimumDate / MaximumDate in the Popup when set in the viewmodel after first opening

[MarchandCedric]

Description

Hello,

When you bind a DatePicker MinimumDate and MaximumDate to a ViewModel, the first time the pop up opens, it displays correctly.
However, after the first display, if you change the MaximumDate/minimumDate in the ViewModel, the popup will open with the first values, not the updated ones.

If you need any other information don't hesitate, or if I'm doing it wrong please let me know.

Regards.

Steps to Reproduce

1. Create a date picker and bind it.
   

2. In your view model, set the MaximumDate.

3. Open the popup, everything ok.

4. Close the pop up.

5. In your viewmodel, change the MaximumDate.

6. Open the popup, it stucks to the old maximum date.

I tried with Datetime? or DateTime, same issue.

Link to public reproduction project repository

No response

Version with bug

10.0.30

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

No response

Did you find any workaround?

I also tried do send a weakReferenceMessenger to my View to change the data directly from it, but same thing. Please note that in this case, if you force with :
EndDatePicker.IsEnabled = false;
await Task.Yield();
EndDatePicker.MinimumDate = null;
EndDatePicker.IsOpen = true;
await Task.Yield();
EndDatePicker.IsOpen = false;
EndDatePicker.MinimumDate = _viewModel.StartDate;
await Task.Yield();
EndDatePicker.IsEnabled = true;
When you open again the DatePicker he is updated with the good date. But it will work only one time.

Relevant log output

[MihuBot]

I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):

• [regression/8.0.3] [Android] DatePicker control minimum date issue #19256

[MarchandCedric]

The bot is right, related issue. However with Muai 10, even with my custom handler, only the first time the pop up is displayed works. The second time (after a change in the viewmodel), the popup is wrong.

[HarishKumarSF4517]

This issue has been validated in Visual Studio code 1.108.0 with MAUI versions 10.0.30, 10.0.20. It was not reproducible on Android platform. I have attached the video and PickerSample.zip for reference:

Screen.Recording.2026-01-19.at.4.15.27.PM.mov

[MarchandCedric]

Hello,
Thans for your answer and your code.
The issue is not with the month, the issue is inside a month. If you modify your code and set the initial date as :

_minimumDate = new DateTime(2025, 1, 4);
_maximumDate = new DateTime(2025, 1, 28);
_selectedDate = new DateTime(2025, 1, 15);

You don't need to change anything else.

The first time you display the date picker, 29-30-31 of january will be greyed - expected, and you can't change month.
Then if you click on your button to change the maximum date to 2027, then you can change of month, but you can't click on 29-30-31, they are not selectable, but they should be.

Here is the video (I didn't find how to capture the mouse). You can see after lciking on your button that I can change month, but not select 29-30-31.

DatePicker.webm

And the image, left before setting to 2027, on the right after :

[Ahamed-Ali]

This issue has been validated in Visual Studio Code 1.108.1 with MAUI Versions 9.0.120, 10.0.0 and 10.0.30 . It can be reproducible on the Android platform.