question

JonathanFeucht-5255 avatar image
1 Vote"
JonathanFeucht-5255 asked AlexanderMalyshkin-0726 answered

Identity scaffolding in .net core 6.0 gives error message "Length cannot be less than zero."

Hello,

I've been trying to scaffold various Identity pages, however I keep getting an error dialog which says "There was an error running the selected code generator: 'Length cannot be less than zero. (Parameter 'length')'". 221876-param-length-zero.png.

In the code generation log, it gives a stack trace:

 Finding the generator 'identity'...
 Running the generator 'identity'...
 Length cannot be less than zero. (Parameter 'length')
    at Microsoft.VisualStudio.Web.CodeGeneration.ActionInvoker.<BuildCommandLine>b__6_0()
    at Microsoft.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args)
    at Microsoft.VisualStudio.Web.CodeGeneration.ActionInvoker.Execute(String[] args)
    at Microsoft.VisualStudio.Web.CodeGeneration.CodeGenCommand.Execute(String[] args)

I'm running version 6.0.7 for the CodeGeneration package.

221699-nuget-packages.png

So is this a bug with the CodeGeneration package? Is there something else I should probably look into for debugging this? How can I get more information for the cause of this error dialog?


dotnet-aspnet-core-mvc
· 1
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You have a lot going in this project. Several different DB providers, Identity Server, SPA services, etc.

Perhaps try creating an MVC project with the Individual user account option then scaffold Identity.

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MarcoA-9583 avatar image
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MarcoA-9583 answered MarcoA-9583 edited

I have the same situation. in asp.net 6 application
I used class program with Main in the program.cs file
"...
public class Program
{


 [Obsolete]
 public static void Main()  //string[] args
 {

.."

I have seen that in new projects the program.cs file does not contain the class program and the Main.
It may have some connection?

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AlexanderMalyshkin-0726 avatar image
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AlexanderMalyshkin-0726 answered

I have the same issue! 228977-scaffolding-issue.png



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