UWP | Universal Windows Platform code examples | Runtime Evironment library

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'm trying to let an api send a mail on behalf of a user.

I have an UWP application (Azure AD App "A") that posts some data to the API (Azure AD App "B")

The API are then going to collect some more data and send a mail as the user that posted that data.

When the post is received by the API the bearer token has "AUD" and "SCP" for the API, now I do a request to Azure AD and swaps the token for a new one with "AUD" and "SCP" for MS Graph API. This works pretty good, until there is a guest user that sends the data. Then I get an "Unauthorized" result back from Graph API.

I assume the reason is because I get the first token as the guest user and then tries to send mail with an account in another tenant.

What can I do to bypass this?

I get a bunch of hits when I search for this but I have ended up going down rabbit holes that were WPF-specific or something like that. My environment is Xamarin Forms Android/iOS/UWP. It is something of an experimental/educational project so there are no totally "hard" requirements for a solution. The ItemTappedEventArgs gives me the contents of the row, but not the specific item or column.

The question is this: if the user taps on a particular item in a ListView ViewCell, how can I determine which specific column or control they tapped?

Here's the relevant Xaml: (RowStyle has only appearance properties like FontSize and Margin.)

This is a UWP app.

I'm trying to select text with a single tap while having buttons that allow a user to differentiate if they want to select a word, sentence, paragraph, or page. I can get the pointer position and the text inside the textbox but I can't find any reasonable way to associate the two.

Is there a property or method that I'm missing which will allow me to get perhaps an index position in the textbox where the pointer currently is?

I have created a UWP app written in HTML, CSS and Javascript by installing Visual Studio 17 and selecting Javascript - Blank App as a new project, adding the HTML, CSS and Javascript files along with a few images into the project directory, accepting the default Internet (Client) permission and running the package.

Nearly everything works as I expected however one issue that has caused me some grief concerns the ability to create and write a text file to a user selected folder on the C:\ drive. In fact I cannot even create a text file in the users Downloads directory.

I have found the following information on the Microsoft Developer site

"By default, your app can only access files and folders in the user's Downloads folder that your app created. However, you can gain access to files and folders in the user's Downloads folder by calling a file picker (FileOpenPicker or FolderPicker) so that users can navigate and pick files or folders for your app to access".

Can I invoke a file picker from inside javascript and would I need to add more permissions, or do I need to transition to a WebView2 based app and do this in C#?

Also where exactly is the "user's Downloads folder that your app created"? Is this a sub-folder under "Downloads"? Does it need to be created? If so, can it be created from javascript?

Or am I simply missing some permission in the manifest? If so which?

All help on this matter would be very gratefully received?

Is it possible to programmaticaly add a row to an UWP DataGrid? I'm trying to do so when an user clicks a button so he can fill the row and when it finishes editing that row data saves on the object that's binded to the datagrid.

Can anyone tell me if one can directly select the DNN AI core for neural network evaluation on HoloLens 2.

I have read about the HPU, which includes and DNN AI core in the GitHub repo here. But in the doc for the devices that can be used only CPU and GPU are listed.

I am working on a WPF application and trying to make a responsive UI using Visual State Manager as MSDN suggests for UWP responsive design and it works on UWP but not on WPF.

Here is the example I am testing on WPF. It is supposed to change the background of the StackPanel to Red on start-up.

The XAML:

I need to copy an icon file in C:// drive due to the first run of my UWP FullTrust Application. Here below is my code, which is working properly in Debug mode but not works in Release mode.