Assets file project.assets.json not found. Run a N

问题:

I'm trying to use nopCommerce(Which is written in .NET Core) but when I want to run the project I face 52 Errors telling me Run a nuget package restore

Assets file ~\obj\project.assets.json' not found. Run a NuGet package restore to generate this file. Nop.Web.MVC.Testsote

when I use the right click on the solution and selecting Restore Nuget Packages I get this message:

All packages are already installed and there is nothing to restore.

but those 52 Errors are still there and in Tools -> NuGet Package Manager -> Manage NuGet Packages for Solution there is nothing installed on the solution,also I Recently updated my VS2017 to 15.5.4

回答1:

To fix this error from Tools > NuGet Package Manager > Package Manager Console simply run:

dotnet restore

The error occurs because the dotnet cli does not create the all of the required files initially. Doing dotnet restore adds the required files.

回答2:

In my case the error was the GIT repository. It had spaces in the name, making my project unable to restore

If this is your issue, just rename the GIT repository when you clone

git clone http://Your%20Project%20With%20Spaces newprojectname

回答3:

Closing and re-opening Visual Studio solved this issue for me, once I'd made sure the NuGet packages had been restored as per other answers posted here.

回答4:

In case when 'dotnet restore' not works, following steps may help:

(1) Visual Studio >> Tools >> Options >> Nuget Manager >> Package Sources (2) Unchecked any third party package sources. (3) Rebuild solution.

回答5:

little late to the answer but seems this will add value. Looking at the error - it seems to occur in CI/CD pipeline.

Just running "dotnet build" will be sufficient enough.

dotnet build

dotnet build runs the "restore" by default.

回答6:

In visual studio 2017 please do following steps:

1) select Tool=>Options=>NuGet Package Manager=> Package Sources then uncheck Microsoft Visual Studio Offline Packages Option.

2) now open Tool=>NuGet Package Maneger=>Package Manager Console. 3) execute command in PM>dotnet restore.

Hope its working...

回答7:

If simply restoring NuGet packages does not work make sure in Tools -> Options -> NuGet Package Manager -> General under Package Restore that the "Allow NuGet to download missing packages" is checked.

Then Restore NuGet Packages again OR just REBUILD after deleting obj and bin folders.

回答8:

Select Tools > NuGet Package Manager > Package Manager Console

And then Run:

dotnet restore <project or solution name>

回答9:

I got the error when I created a lambda in dot net core in VS2017. What worked for me was to unload the project and load it back.

回答10:

run your VS as administrator after that in package manager console run dotnet restore.

回答11:

If @mostafa-bouzari suggestion doesn't help, check carefully in 'Error list' or 'Output' windows for errors why NuGet cannot restore, e.g. because of net problem if you're behind proxy.

回答12:

Another one, if by any chance you're using Dropbox, check for Conflicted in file names, do a search in your repo and delete all those conflicted files.

This may have happened if you have moved the files around.

回答13:

Cause of this defect: you have to remove the injected Nuget in file explorer. Solution: Once you remove that Nuget in your system, then remove from following location. select Tool=>Options=>NuGet Package Manager=> Package Sources then uncheck Microsoft Visual Studio Offline Packages Option