ListView | ListView嵌套GridView以及ListVIew嵌套ListVIew还有时间轴效果

i have a map like this:

I've created a simple VBA interface to connect Excel to a MySQL DB. The VBA part acts as a preview of data for the user to choose what item he wants to import to the Excel sheet.

Until now I've work with a very complete set of data, but I got to a Table which (because of the nature of the items) some fields are NULL.

Now every time I try to check the values in the VBA I get the Run-time error 13 Type mismatch in the listview component. At first I though it was a field with DECIMAL typing, but after changing it to a DOUBLE (for testing) the problem persisted, and it was until I notice that if only checks columns with no NULL value, the problem disappears. Off course I can't omit this values.

I tried some .Tostring functions but with no success. And I failed to implement a IF to check for NULL in the obj.

This is my code:

I am trying to build a cinema app with flutter. The structure is as follows:

• in each city there are a bunch of cinemas
• in a cinema there are a bunch of showrooms(salle in french)
• in a showroom(salle in french) there are five display sessions or projections, these projections are of the same film.

because the projections are of the same movie (a showroom displays the same movie in different time(e.g projections) by design), when I click on any of the projections in a showroom I should have the same posture of the same film, not a different posture in each projection.

However I get a different film posture in each projection, and I don't know what is causing this.

I am using a rest api that I created with Spring, and I am certain that the problem is not from my back-end because I am using it in an angular web app and it's working perfectly.

This is a layout of my application

this is what happened when I click on two projection of the same showroom( notice that the posture changes when it shouldn't.

and here is the code of the showroom page (salles-page.dart)

So I am relatively new to programming, and I have been working on this task app, where I want to save the data such as task name and more, given by the user. I am trying to accomplish this using Room. Now, initially, when I tried to do it, the app would crash since I was doing everything on the main thread probably. So, after a little research, I came to AsyncTask, but that is outdated. Now finally I have come across the Executer. I created a class for it, but I am a little unsure as to how I can implement it in my app. This is what I did :

Entity Class :

I have a table with posts that can have multiple categories, and a table with categories that can have multiple posts. models.py:

I have a AdvancedCollectionView from Windows Community Toolkit version 6.1.1 and trying to use it to filter out on 2 string properties.

I have created a simple app to reproduce the issue : https://github.com/touseefbsb/UWP-Filter-List

It has a textbox for filtering between StartNumber and EndNumber properties of items.

but as soon as I enter text "123" into it, it shows no item in the ListView when it should actually show only the first item, based on the test logic.

MainPage.xaml

I have widget:

I am trying to dynamically add items to the list in Flutter so this list runs indefinitely. (I am trying to achieve this using a ListView.builder and the Future class).

The end-effect I am seeking is an endless auto-scrolling of randomly generated images along the screen at a smooth rate (kind of like a news ticker).

Is this possible? I have been reworking for ages (trying AnimatedList etc) but cant seem to make it work!

Would love any help to solve this problem or ideas.

I try to Send data from Activity to AccessibilityService. There are solution i found 1 2 but it is not work. This is my code when i use 2:

in Activity this is my intent