I've been using Visual Studio Mac for a little while and have just updated it to the released version. I've also downloaded and installed .NET Core 2.0 Preview 1. From a shell prompt I can generate a new Web API project:
dotnet2 davec$ dotnet --version
2.0.0-preview1-005977
dotnet2 davec$ dotnet new webapi
The template "ASP.NET Core Web API" was created successfully.
This template contains technologies from parties other than Microsoft, see https://aka.ms/template-3pn for details.
Processing post-creation actions...
Running 'dotnet restore' on dotnet2/dotnet2.csproj...
Restore succeeded.
I can build and run that project from the shell. But when I open it in Visual Studio for Mac, the IDE tries and fails to restore:
Errors in dotnet2/dotnet2.csproj
Unable to resolve 'Microsoft.NETCore.App (>= 2.0.0)' for '.NETCoreApp,Version=v2.0'.
Unable to resolve 'Microsoft.NETCore.App (>= 2.0.0)' for '.NETCoreApp,Version=v2.0 (win)'.
Unable to resolve 'Microsoft.NETCore.App (>= 2.0.0)' for '.NETCoreApp,Version=v2.0 (win-x64)'.
Unable to resolve 'Microsoft.NETCore.App (>= 2.0.0)' for '.NETCoreApp,Version=v2.0 (win-x86)'.
NuGet Config files used:
~/.config/NuGet/NuGet.Config
Feeds used:
https://api.nuget.org/v3/index.json
Restore failed for 'Microsoft.NETCore.App (>= 2.0.0)'.
Restore failed.
For the sake of completeness, documenting the answer here following #jmoerdyk's comment:
My Environment:
MacOSX 10.12.4
dotnet version: 2.0.0-preview1-005977
Open the csproj file in a text editor (vi, TextEdit, VS Code)
Modify the Target framework and RuntimeFrameworkVersion to be this:
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>netcoreapp2.0</TargetFramework>
<RuntimeFrameworkVersion>2.0.0-preview1-002111-00</RuntimeFrameworkVersion>
</PropertyGroup>
</Project>
Run nuget restore, build the project and you should be good to go
Visual Studio for Mac 7.1 is compatible with .NET Core 2.0 Preview 2, but it is currently in beta. Select "Check for Updates" from the main menu and switch to "Beta" channel. See Xamarin docs and preview release notes.
Now you can get .NET Core 2.0 from here, and then install pkg. Next step is changing target framework in solution in vs. Have fun!
Related
When running dotnet build in my project, I have the following error:
/path/to/repo/Toolkit/My.Company.Toolkit.Platform.Android/My.Company.Toolkit.Platform.Android.csproj(91,3): error MSB4019: The imported project "/usr/local/share/dotnet/sdk/7.0.102/Xamarin/Android/Xamarin.Android.CSharp.targets" was not found. Confirm that the expression in the Import declaration "/usr/local/share/dotnet/sdk/7.0.102//Xamarin/Android/Xamarin.Android.CSharp.targets" is correct, and that the file exists on disk.
/path/to/repo/Toolkit/My.Company.Toolkit.Platform.iOS/My.Company.Toolkit.Platform.iOS.csproj(195,3): error MSB4019: The imported project "/usr/local/share/dotnet/sdk/7.0.102/Xamarin/iOS/Xamarin.iOS.CSharp.targets" was not found. Confirm that the expression in the Import declaration "/usr/local/share/dotnet/sdk/7.0.102//Xamarin/iOS/Xamarin.iOS.CSharp.targets" is correct, and that the file exists on disk.
I confirm that /usr/local/share/dotnet/sdk/7.0.102/Xamarin/iOS/Xamarin.iOS.CSharp.targets does not exist.
But I don't know how to install it there.
The reference to Xamarin is defined in the csproj like this <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />.
When I build from Visual Studio I have no issues. And if I try to re-install Xamarin, it says it is already installed.
I am on MacOS.
[UPDATE]
I uninstalled everything (Visual Studio, SDKs/Runtime, dotnet, etc).
Installed just Visual Studio 2022 for Mac.
➜ ~ dotnet --info
.NET SDK:
Version: 7.0.102
Commit: 4bbdd14480
Runtime Environment:
OS Name: Mac OS X
OS Version: 13.1
OS Platform: Darwin
RID: osx.13-arm64
Base Path: /usr/local/share/dotnet/sdk/7.0.102/
Host:
Version: 7.0.2
Architecture: arm64
Commit: d037e070eb
.NET SDKs installed:
6.0.405 [/usr/local/share/dotnet/sdk]
7.0.102 [/usr/local/share/dotnet/sdk]
.NET runtimes installed:
Microsoft.AspNetCore.App 6.0.13 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 6.0.13 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.2 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Other architectures found:
None
Environment variables:
Not set
global.json file:
Not found
Learn more:
https://aka.ms/dotnet/info
Download .NET:
https://aka.ms/dotnet/download
Now if I try to build the project in the terminal I still have the same error. But if I try to build it from Visual Studio I have a different error.
I have this error in the build output
Target RazorGenerateComponentDeclaration:
/usr/local/share/dotnet/dotnet exec "/Users/redacted/Library/Caches/VisualStudio/17.0/MSBuild/36265_3/Sdks/Microsoft.NET.Sdk.Razor/build/netstandard2.0/../../tools/netcoreapp3.0/rzc.dll" generate
-s
/Users/redacted/Developer/repositories/bcee/Toolkit/MyCompany.Toolkit.Platform.Web/_Imports.razor
-r
_Imports.razor
-o
/Users/redacted/Developer/repositories/bcee/Toolkit/MyCompany.Toolkit.Platform.Web/obj/Debug/netstandard2.1/RazorDeclaration/_Imports.razor.g.cs
-k
component
-p
/Users/redacted/Developer/repositories/bcee/Toolkit/MyCompany.Toolkit.Platform.Web
-t
obj/Debug/netstandard2.1/MyCompany.Toolkit.Platform.Web.RazorComponents.declaration.json
-v
3.0
-c
Default
--root-namespace
MyCompany.Toolkit.Web
--csharp-language-version
8.0
--generate-declaration
The application to execute does not exist: '/Users/redacted/Library/Caches/VisualStudio/17.0/MSBuild/36265_3/Sdks/Microsoft.NET.Sdk.Razor/build/netstandard2.0/../../tools/netcoreapp3.0/rzc.dll'
/Users/redacted/Library/Caches/VisualStudio/17.0/MSBuild/36265_3/Sdks/Microsoft.NET.Sdk.Razor/build/netstandard2.0/Microsoft.NET.Sdk.Razor.Component.targets(106,5): error : rzc generate exited with code 129.
Done building target "RazorGenerateComponentDeclaration" in project "MyCompany.Toolkit.Platform.Web.csproj" -- FAILED.
Done building project "MyCompany.Toolkit.Platform.Web.csproj" -- FAILED.
Build FAILED.
The tools directory does not exists.
At fisrt, you said:
When I build from Visual Studio I have no issues.
The cause should be when you build from the Visual Studio. The framework your project used is .netstandard 2.0. You can check the project.csproj file and the SDK in the /usr/local/share/dotnet/sdk.
In addition, you can check this case which has the similar error as yours. According to it, if the .net version is not compatible with the xamarin will also get this error. dotnet/sdk/7.0.102 should be the .net 7 which is compatible with the .net maui not the xamarin. So you can't use the dotnet build the project.
You can try to find the right value of the MSBuildExtensionsPath and set it in the android and ios .csproj file according to this case which is about set the project's MSBuildExtensionsPath.
Finally, you can try the solution in this case which has the same error message.
The Xamarin tool chain was built upon Mono, so everything you triggered in VS for Mac is kindly processed by MSBuild for Mono (at Mac terminal you can use msbuild --version to learn more).
dotnet build, however, was designed exclusively for .NET Core based projects, so by default it won't be able to handle Xamarin projects, but only .NET MAUI.
As legacy Xamarin projects are going away soon, you should start to migrate to MAUI as soon as you can,
https://dotnet.microsoft.com/en-us/platform/support/policy/xamarin
I have three versions of .NET Core installed on my machine:
However, both VS2017 and VS 2019 return the following error when I execute dotnet --version command:
PM> dotnet --version
dotnet : Did you mean to run dotnet SDK commands? Please install dotnet SDK from:
I can create a solution targeting .NET Core but when I create a Console App targeting .NET Core, for example, the Debug button is labeled Attach instead of Start as usual, and Start Debugging and Start Without Debugging commands in the Debug menu are disabled.
What I tried so far:
Added "C:\ProgramFiles\dotnet" to system PATH variable.
Modified VS2019 using VS Installer.
Restarted several times.
I did have several other version of .NET Core but uninstalled them since I had no solutions targeting these versions and wanted to clean up.
I only left 2.2.300 and 3.0.100 and when I used VS Installer to modify VS2019 it added SDK 2.1.700.
Any ideas on how to resolve this issue without completely removing Visual Studio and installing from scratch?
Apparently x86 version(s) of .NET Core SDKs must be installed as well. After installing 3.0.100 x86 dotnet --version command works fine and I can build and debug .NET Core projects...
I was using .Net Core 2.1.1, and recently updated the SDK to 2.1.401 (.Net Core Runtime 2.1.3). When i create a new project the version of Microsoft.AspNetCore.App under Dependencies > SDK is still 2.1.1. Looking at the properties of Dependencies > NuGet, the package is being referenced from "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\microsoft.aspnetcore.app\2.1.1"
I tried installing Package 2.1.3 using NuGet package manager, and it downloaded all dependencies from NuGet despite that i have 2.1.3 already installed on my machine.
How do i force existing / new project to use the latest version of packages from the SDK install ?
You shouldn't need to update the version of Microsoft.AspNetCore.App manually in your project. 2.1.1 is perfectly fine. Your application will run on the latest 2.1.* framework installed on the machine.
If you publish a self-contained application, the tooling will automatically switch to the latest known version of 2.1.* at build time for the self-contained build only. (-r win-x64 argument)
This may or may not change for the 2.2 or 3.0 releases, read/follow this GitHub issue and thread for more information.
This is a bug as it has already been reported but for now this can be the solution.
In ProjectName.csproj file:
<PropertyGroup>
<TargetFramework>netcoreapp2.1</TargetFramework>
<RuntimeFrameworkVersion>2.1.3</RuntimeFrameworkVersion>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.AspNetCore.App" Version="2.1.3" />
</ItemGroup>
When I try to run the .NET Core Project on last version of Visual Studio Preview for Mac, I get next error:
The specified framework 'Microsoft.NETCore.App', version '1.0.1' was not found.
- Check application dependencies and target a framework version installed at:
/usr/local/share/dotnet/shared/Microsoft.NETCore.App
- The following versions are installed:
1.1.0
- Alternatively, install the framework version '1.0.1'.
The application was terminated by a signal: SIGQUIT
WARNING: The target process exited without raising a CoreCLR started event. Ensure that the target process is configured to use Microsoft.NETCore.App 1.0.0 or newer. This may be expected if the target process did not run .NET code.
I opened Project Settings, and in the 'Target Framework' Dropdown there is no .NETCoreApp 1.1, only 1.0 (which is not installed)
What should I change in project or Studio configs for project to run successfully? Or I just must wait for VS update?
Thanks for response.
Update your nuget packages i.e Project -> Update Nuget Packages. The Microsoft.NetCore.App package is out of date.
Step 1: setup .net Core
--> https://www.microsoft.com/net/core#macos
--> if you get donet new command not found, try this: ln -s /usr/local/share/dotnet/dotnet /usr/local/bin/
Step 2: update packages
I am trying to automate my build process for my Xamarin.iOS application. I have managed to get a Xamarin.Android and UWP build working find on my on site Windows build agent.
I am now trying to build a Xamarin.iOS application using my On Site Mac build agent.
I have added the Restore Nuget packages as the first step in this build definition but keep getting the error:
MSBuild auto-detection: using msbuild version '4.0' from
'/Library/Frameworks/Mono.framework/Versions/4.2.3/lib/mono/4.5'.
MsBuild.exe does not exist at
'/Library/Frameworks/Mono.framework/Versions/4.2.3/lib/mono/4.5/msbuild.exe'.
Error: /usr/local/bin/nuget failed with return code: 1 Return code: 1
But I'm not sure what it's trying to do here at the nuget installer stage.
So is this possible to do?
There is a known issue with nuget restore command on non-Windows operating systems:
Restore - Restore works with packages.config and project.json files
but will not yet work with *.sln solution files
So you can try to update the "Restore Nuget Packages" step to restore the packages.config file instead of solution file. If it still does not work, then try to change the "Installation type" from "Restore" to "Install".
NuGet 3.2
With NuGet 3.2, the following commands have been tested to work:
Config
Delete
Help
Install
List
Push
SetApiKey
Sources
Spec
Refer to this link for details: NuGet Compatibility.
I was having a similar issue. My log said:
Unable to find version '2.1.0' of package 'Acr.Support'.
[error]Error: /usr/local/bin/nuget failed with return code: 1
After some digging in the logs I tried to restore the nuget packages on my local mac. I opened the terminal and typed :
sudo cd /usr/local/bin
[enter password]
Your nuget executable should be located there.
I executed:
nuget
To see my nuget version, which was 2.12.0.0
I noticed that this is an old version so I updated it by:
sudo su
[enter password]
nuget update -self
I noticed that it updated to 3.4.4 rtm final, I started my Visual Studio Online flow again and it worked! Hopefully this helps anyone.