问题
I am working on an ASP.NET MVC project and so far I had no problems with scaffolding any type of items until now.
Every time I want to create a new controller or view, I get the following error message:
There was an error running the selected code generator: 'The value -1 is outside the acceptable range of [0,2147483647]. Parameter name :value'
This issue only arises in the project that I'm currently working on as I tried creating a new controller in another project and it worked flawlessly.
I already tried the solution to delete the ComponentModelCache folder and rebuilding the project but the problem still persists.
My Visual Studio 2019 is also up to date.
EDIT: Pulling the project from git source control on another PC and restoring the packages fixed the issue for me. You probably don't have to do it from another computer, just try deleting the project and restoring it from remote.
EDIT 2: Creating a second view and the same problem is back again...
回答1:
I fixed this by unloading and reloading the project
回答2:
You just need to - delete ".vs" folder from your solution directory. In summary only the deleting of the .vs folder is what has worked for me.
On reopening VS2019 16.2.3 - I can now add in Controllers and Views without seeing this error.
Found it from Microsoft Developer Community site: https://developercommunity.visualstudio.com/content/problem/626755/error-running-the-selected-code-generator-value-1.html?childToView=684261#comment-684261
code-generator-solution
回答3:
This issue has been resolved in Visual Studio 2019 version 16.2.4. The release notes are available here:
https://docs.microsoft.com/en-us/visualstudio/releases/2019/release-notes#16.2.4
回答4:
One of the possibility is if your web.config file is open then this error might appear. Try closing the web.config file and then add a View.
You can also reach out to this website for more reference: Error Running the Selected Code Generate Value
Hope this helps.
回答5:
I was able to fix this by replacing the web project with a new one.
-I renamed the project like project_old folder and removed it from solution. -Added a new project to the solution by right click and add project -Created the old controllers and everything with copying from old project files -Updated nuget packages and deleted old project files
Clean Solution -> Rebuild Solution and voilla
回答6:
Close all documents, and try again to create new controller. It works for me in Visual Studio 2019 asp.net MVC but I don't know why
回答7:
I was able to fix this by manually deleting the BIN and OBJ folders for my projects. Running Clean in Visual Studio did not work.
回答8:
I was getting this error - as my project is a git repository, I ran git clean -xfd on it, then rebuilt it and was able to add a controller when I tried again.
回答9:
i fix it, deleting the .vs folder, re opening the project, and clenning the solution
回答10:
try both any one will work either of them.
1.Just delete .vs folder in project solution.
2.If above fix does not work.,close your web.config file if it is opened.
回答11:
I tried it all and finally found a solution that worked, this issue only happens when the web.config file is open in the editor. Hope this help.
Credits :
Vijay Ramakrishnan [MSFT]
https://developercommunity.visualstudio.com/content/problem/626755/error-running-the-selected-code-generator-value-1.html
回答12:
Go Back to VS 2017 and it will work just fine
回答13:
just use vs15. In many regards vs19 is still beta...
来源：https://stackoverflow.com/questions/57436290/there-was-an-error-running-the-selected-code-generator-the-value-1-outside-t