Binding and Uno.Microsoft.Xaml.Behaviors.WinUI.Managed in different projects

[leaderanalytics]

I have two projects in my solution. In one project - a library project I added, Binding in XAML files builds and works well. In the other project - provided by the new project template, Binding generates compile time errors and only x:Bind works. I eventually want to switch everything to x:Bind but until that happens I am interested to know why Binding works in one project and not the other.

Library project I added: <Project Sdk="MSBuild.Sdk.Extras/3.0.23"> Binding works, Uno.Microsoft.Xaml.Behaviors.WinUI.Managed works

Default library project added by the template: <Project Sdk="Microsoft.NET.Sdk"> Binding does not work, Uno.Microsoft.Xaml.Behaviors.WinUI.Managed does not work

Error XLS0505 Type 'Binding' is used like a markup extension but does not derive from MarkupExtension.

I am referencing Uno.Microsoft.Xaml.Behaviors.WinUI.Managed however my project does not recognize it. This article does not indicate that a conditional package reference is required. The samples project references the source projects directly so I can't tell from that if I'm referencing it correctly. Also, I am referencing same nuget in my library project and it works fine.

<ItemGroup>
	//...
	<PackageReference Include="Uno.Microsoft.Xaml.Behaviors.WinUI.Managed" Version="2.3.1-uno.2" />  
</ItemGroup>

XAML:

xmlns:Interactivity="using:Microsoft.Xaml.Interactivity" 
xmlns:Interactions="using:Microsoft.Xaml.Interactions.Core"

//...


<ComboBox Width="120" BorderBrush="Black" BorderThickness=".5" Padding="6" VerticalAlignment="Center">
	<Interactivity:Interacton.Behaviors>
		<Interactions:EventTriggerBehavior EventName="SelectionChanged">
			<Interactions:InvokeCommandAction Command="{x:Bind SelectedThemeChangedCommand}" />
		</Interactions:EventTriggerBehavior>
	</Interactivity:Interacton.Behaviors>
</ComboBox>

Error WMC0010 Unknown attachable member 'Interacton.Behaviors' on element 'ComboBox'
Error UXAML0001 The type {using:Microsoft.Xaml.Interactivity}Interacton could not be found LeaderPivot.XAML.UNO.Host

How can I use Uno.Microsoft.Xaml.Behaviors.WinUI.Managed in this project?

[jeromelaban]

This article is outdated and conditional references are needed.

You'll need something like this:

<ItemGroup Condition="'$(TargetFramework)' == 'net6.0-windows10.0.18362.0'">
  <PackageReference Include="Microsoft.Xaml.Behaviors.WinUI.Managed" Version="2.0.9" />
</ItemGroup>
<ItemGroup Condition="'$(TargetFramework)' != 'net6.0-windows10.0.18362.0'">
  <PackageReference Include="Uno.Microsoft.Xaml.Behaviors.WinUI.Managed" Version="2.3.0" />
</ItemGroup>

[leaderanalytics]

Thank you @jeromelaban. I added the references as specified and I still get the same errors. I deleted bin/obj/.vs several times.

<ItemGroup Condition="'$(TargetFramework)'=='net7.0-windows10.0.18362'">
	<PackageReference Include="Microsoft.Xaml.Behaviors.WinUI.Managed" Version="2.0.9" /> 



<ItemGroup Condition="'$(TargetFramework)'!='net7.0-windows10.0.18362'">	
	<PackageReference Include="Uno.Microsoft.Xaml.Behaviors.WinUI.Managed" Version="2.3.1-uno.2" />

It appears that Uno.Community.Toolkit is referencing Uno.Microsoft.Xaml.Behaviors.WinUI.Managed 2.3.1-uno.2. If I try to add 2.3.0 I get a downgrade error from nuget.

[leaderanalytics]

@jeromelaban I found my typo! Very sorry!

[modula2019]

Hi @jeromelaban and @leaderanalytics, I know it is a long time ago this issue was raised. I am also trying to use interactivity with my combobox so that raise SelectionChanged in my viewmodel. I am using net8.0. When I added the itemgroup to target net8.0 windows, my application stopped debugging with a lot of errors. Is there no packages for net8.0 yet?

Please advise,
Best regards

<ItemGroup Condition="'$(TargetFramework)'=='net8.0-windows10.0.19041'">
  <PackageReference Include="Microsoft.Xaml.Behaviors.WinUI.Managed"/>
</ItemGroup>

<ItemGroup Condition="'$(TargetFramework)'!='net8.0-windows10.0.19041'">
  <PackageReference Include="Uno.Microsoft.Xaml.Behaviors.WinUI.Managed"/>
</ItemGroup>

[jeromelaban]

@modula2019 it would be best to open another discussion with the errors you're getting.

[modula2019]

@jeromelaban I have opened another discussion here. Thanks
#16856

[agneszitte]

@modula2019, @jeromelaban I have left the details on #16856