Build Error NETSDK1130 when using .Net 5.0 and NuGet-Package 'Microsoft.Toolkit.Forms.UI.Controls.WebView'

[Lohnegrim]

Compiling with .Net 5.0 Preview 6 raises this Error when then NuGet-Package 'Microsoft.Toolkit.Forms.UI.Controls.WebView' (Tested with Version 6.1.1) is referenced: error NETSDK1130: Referencing a Windows Metadata component directly when targeting .NETCoreApp,Version=v5.0 is not supported. Use the C#/WinRT projection tool (https://aka.ms/cswinrt) or a provided projection for this target.

[ghost]

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[ghost]

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[michael-hawker]

@azchohfi I'd assume this is expected?

@Lohnegrim please try using WebView2 instead here, that's the supported path moving forward.

[azchohfi]

Yes, this is expected. This package will not work as-is on DotNet5, as the old projections for winmds were removed in favor of cswinrt.

[Lohnegrim]

@michael-hawker I tryed to create a new project with WebView2 as explained in this Link: https://docs.microsoft.com/en-us/microsoft-edge/webview2/gettingstarted/winforms but didn't get the Webview2 Control in the Toolbox. Not sure whats wrong, because I also tryed to replace 'Microsoft.Toolkit.Forms.UI.Controls.WebView' with 'Microsoft.Web.WebView2', in the project I used before, but it also didn't work (didn't find WebView2). NuGet shows the that WebView2 is installed, but everywhere else I don't see it.

Remark: The Version I installed is 0.9.579 I restarted VS multiple times, rebuild multiple times opened and closed the Designer multiple times but I don't see the WebView2.

[carlossanlop]

@azchohfi I think I'm seeing a similar issue to the one @Lohnegrim is seeing.

I'm trying to upgrade an old .NET Framework WinForms project to .NET 5.0. I already managed to make it successfully build after changing the csproj to consume .NET 5.0, but I want to stop using the old WebBrowser type which shows Internet Explorer. So I followed the instructions for WebView2, but after downloading the nuget package, I am unable to add the using and consume the WebView2 type.

What information would you need from me to help investigate the problem?

Edit: I think I found the problem. The documentation clearly says:

Important! Ensure you check Include prerelease, select a prerelease package in Version, and then choose Install.

While I had originally selected the checkbox "Include prerelease", I didn't specifically install a package that contained the keyword "prerelease" in its version, I installed 0.9.579, which is the one that didn't work. So after installing 0.9.579-prerelease:

  <ItemGroup>
    <PackageReference Include="Microsoft.Web.WebView2" Version="0.9.579-prerelease" />
  </ItemGroup>

WebView2 showed up in the toolbox and all the references started resolving.

Hope that helps you too, @Lohnegrim.

I have a question, @azchohfi - Why isn't the latest stable release working?

[azchohfi]

That is a good question. Have you tried it with the new version that we shipped ~5 days ago? https://www.nuget.org/packages/Microsoft.Web.WebView2/0.9.622.11 Maybe it was fixed.

[Lohnegrim]

Hi @azchohfi I think this may be a different issue, but I just tryed this with a new project in the latest VS2019 Version, and it didn't work. At least till I unloaded the new project and loaded it again. So I only got NuGet to Work after unloading and reloading the project, not sure why. But even so I only worked with The Preview Version, and not with the Version you linked