Support for .Net 7 WINUI-3 apps

[touseefbsb]

I made a new project for win ui 3 and the app is targeted to .Net 7 and when I try to install FFmpegInteropX nuget on it it fails.

<TargetFramework>net7.0-windows10.0.19041.0</TargetFramework>
<TargetPlatformMinVersion>10.0.17763.0</TargetPlatformMinVersion>

Package FFmpegInteropX 1.0.1 is not compatible with net7.0-windows10.0.19041 (.NETCoreApp,Version=v7.0). Package FFmpegInteropX 1.0.1 supports: uap10.0 (UAP,Version=v10.0)

[brabebhin]

Use the pre-release package or check out the winUI sample in the repository.

[touseefbsb]

Ok I did that and now I was able to install it however I am getting following error :

Error NETSDK1148 A referenced assembly was compiled using a newer version of Microsoft.Windows.SDK.NET.dll. Please update to a newer .NET SDK in order to reference this assembly.

and I tried installing latest .Net 7 SDK on my machine as well. maybe because the nuget is based on .Net 6 ? could that be the reason?

[brabebhin]

The nuget should work with NET 6. Not sure about 7, and it's unlikely we will support 7 cause it is a short support version. Did you install the package or is the project referenced directly?

[touseefbsb]

I installed the package. if downgrading my winui project to .net 6 is the only option then sure I can adjust my solution accordingly. But I was hoping to make it work with .net 7 since all winui nugets and even the template studio project generation creates it with .net 7

[brabebhin]

The best way to work with 7 is to reference the project directly and manually up the version number.

You should be aware we don't fully support winUI 3, partly because of bugs on CsWinRT and partly cause we need a separated build.

[lukasf]

This is a WinUI thing. You need to manually specify a higher Windows SDK Ref version in the project file. Check here:

https://platform.uno/docs/articles/features/winapp-sdk-specifics.html

For the version number, use your target SDK version number, and for the last digit use the highest revision you find for that number on NuGet: https://www.nuget.org/packages/Microsoft.Windows.SDK.NET.Ref

[brabebhin]

Yes IIRC you need to do some manual changes to the template VS creates in order to use our library.

[touseefbsb]

ok so I have updated my project file like so that I added a new ItemGroup with the 2 FrameworkReference tags and added the latest version of versions as described but it is still failing with the following error :

Error :

the error points to NETSdkError in this file Microsoft.Net.Windows.targets

[lukasf]

Our lib has platform target 10.0.22000.0. I think you must use at least this version (or higher) in your app. I just checked our WinUI sample: It also does not compile if I use a lower target sdk than the lib.

[touseefbsb]

Thanks it is building now.

[lukasf]

Glad to hear that. You might be able to remove the FrameworkReference thing, since most of the time things work fine without it.