Autocomplete of binding properties doesn't work in Visual Studio 2022 mostly

[ProviceUnify]

Describe the bug

Autocomplete Ctrl + Space for < ...={Binding ...} .../> doesn't work in Visual Studio 2022 mostly. It works in simple solutions, in some other solutions but it is unable yo use this feature in some other solutions.

Code of AlgorithmsViewModel.cs:

using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;

namespace Namespace.ViewModels.Pages
{
    public partial class AlgorithmsViewModel : ViewModelBase
    {
        [ObservableProperty]
        private string _pageName = "Algorithm View Model!";

        [RelayCommand]
        private void ButtonBindingTest()
        {
            PageName = "Algorithm View Model Changed !111!";
        }
    }
}

Code of AlgorithmsView.cs

<UserControl xmlns=         "https://github.com/avaloniaui"
             xmlns:x=       "http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d=       "http://schemas.microsoft.com/expression/blend/2008"
             xmlns:mc=      "http://schemas.openxmlformats.org/markup-compatibility/2006"
             mc:Ignorable=  "d" d:DesignWidth="800" d:DesignHeight="450"
             x:Class=       "Namespace.Views.Pages.AlgorithmsView"

             Tag=           "ALG"

             xmlns:vm=      "using:Namespace.ViewModels.Pages"

             x:DataType=    "vm:AlgorithmsViewModel">
  <Design.DataContext>
    <vm:AlgorithmsViewModel/>
  </Design.DataContext>
  <StackPanel>
    <TextBlock>Algorithms View!</TextBlock>
    <TextBlock Text="{Binding PageName}"/> <!-- HERE AUTOCOMPLETE DOESN'T APPEAR -->
    <Button Command="{Binding ButtonBindingTestCommand}">Press me!</Button> <!-- HERE AUTOCOMPLETE DOESN'T APPEAR -->
  </StackPanel>
</UserControl>

Code of MainView.cs (part)

<UserControl xmlns=         "https://github.com/avaloniaui"
             xmlns:x=       "http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d=       "http://schemas.microsoft.com/expression/blend/2008"
             xmlns:mc=      "http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:vm=      "using:Namespace.ViewModels"
             mc:Ignorable=  "d" d:DesignWidth="800" d:DesignHeight="450"
             x:Class=       "Namespace.Views.MainView"

             xmlns:cnvrt=   "using:Namespace.Resources.Converters"

             xmlns:ui=      "using:FluentAvalonia.UI.Controls"
             xmlns:fi=      "using:FluentIcons.Avalonia"

             x:DataType="vm:MainViewModel">

  <Design.DataContext>
    <vm:MainViewModel/>
  </Design.DataContext>
...
    <Grid ColumnDefinitions="* *"
          RowDefinitions="Auto"
          VerticalAlignment="Center">
      <Border>

        <StackPanel Grid.Column="0"
                    Orientation="Horizontal">

          <Image Source="/Assets/Logo.png"
                 Height="40"
                 Margin="12 4"
                 HorizontalAlignment="Left"
                 VerticalAlignment="Center" />
          <StackPanel Margin="0,0,0,0"
                      VerticalAlignment="Center"
                      Orientation="Vertical">
            <TextBlock FontSize="20"
                       FontWeight="Bold"
                       Foreground="DarkGray"
                       Text="Text" />
            <TextBlock FontSize="11"
                       FontWeight="Light"
                       Text="{Binding GuiLocalization[TitleDescription], Converter={StaticResource l18n_mnemonica}}"/> <!-- HERE AUTOCOMPLETE WORKS -->
          </StackPanel>
...

Code of MainViewModel.cs

using System.Collections.Generic;

using CommunityToolkit.Mvvm.ComponentModel;

namespace Namespace.ViewModels;

public partial class MainViewModel : ViewModelBase
{
    [ObservableProperty]
    private static Dictionary<string, string> _guiLocalization = new()
        {
            { "TitleDescription", "{120.TITLE_DESCRIPTION}" }
        };
}

To Reproduce

1. Create Avalonia template project
2. Create structure of project like in Description section above
3. Add property (public type name => "value" or using [ObservableProperty] - not matter)
4. Go to connected ...ViewModel.cs and try to use Binding autocomplete Ctrl + Space

Expected behavior

See variant of user defined props bottom:

BUT

Got empty list with default entries (here i have defined PageName prop in ViewModel also):

Avalonia version

11.0.10

OS

Windows

Additional context

I already used:

1. Building project/solution - i have another large project where autocomplete is working
2. Clearing Intellisense cache by extension
3. Recreating "cursed" files - seems like working but until 1 new prop
4. Creating new project and transfering files and code to it

I have:

1. Set x:DataType in .axaml header
2. Set Design.DataContext in .axaml header
3. Double-, Triple- and Quadruple checked all paths, namespaces etc. It works sometimes but stops at randomly without any chanes so paths and other params are true

[ProviceUnify]

Important: solution can be buit and works fine - Bindings work. Doesn't work autocomplete exactly

[workgroupengineering]

Try adding the following target to your YourApp.Desktop.csproj

https://github.com/AvaloniaUI/Avalonia/blob/fde8a65157cd9242c1cc0f70f9c9f2705cf56757/packages/Avalonia/AvaloniaBuildTasks.targets#L238-L254

Unload and Lood YourApp.Desktop.csproj or restart VS

Build solution

[ProviceUnify]

Try adding the following target to your YourApp.Desktop.csproj

https://github.com/AvaloniaUI/Avalonia/blob/fde8a65157cd9242c1cc0f70f9c9f2705cf56757/packages/Avalonia/AvaloniaBuildTasks.targets#L238-L254

Unload and Lood YourApp.Desktop.csproj or restart VS

Build solution

Doesn't give any affect. Still no autocomplete. Tried add to YourApp.csproj too for sure

[ProviceUnify]

Checked Same code on Rider Trial - works perfectly (but i cant use Rider for dev anyway). Problem is in VS extension exactly

[ProviceUnify]

Well. Found out reason of this bug and how to fix it. This code will have available autocomplete for bindings:

<UserControl
...
x:DataType="vm:IdentificationViewModel">
  <StackPanel>
    <TextBlock>Identification View!</TextBlock>
    <TextBlock Text="{Binding PageName}"/> <!-- VS will suggest you "PageName" prop from VM here -->
    <Button Command="{Binding ButtonBindingTestCommand}">Press me!</Button>
  </StackPanel>
</UserControl>

This one WILL NOT have autocomplete for bindings:

<UserControl
...
x:DataType= "vm:IdentificationViewModel"> <!-- watch here: space(s) (or tab(s)) between x:DataType= AND "..." (value) -->
  <StackPanel>
    <TextBlock>Identification View!</TextBlock>
    <TextBlock Text="{Binding }"/> <!-- VS will not suggest you any of your props from VM here -->
    <Button Command="{Binding }">Press me!</Button>
  </StackPanel>
</UserControl>

Reason was a Spaces or Tabs between x:DataType= attribute and its value "...". For proper work it should be seamlessly x:DataType="..."

[timunie]

Reason was a Spaces or Tabs between x:DataType= attribute and its value "...". For proper work it should be seamlessly x:DataType="..."

don't know if we can have an XAML warning for this. /cc @maxkatz6

[maxkatz6]

No, whitespaces should be supported there, as it's a valid XML.