Error message while generating a controller in Dotnet ASP.NET Core

Question

I'm trying to generate a controller in Dotnet ASP.NET Core by following the tutorial on https://learn.microsoft.com/en-us/aspnet/core/tutorials/first-mvc-app/adding-model?view=aspnetcore-8.0&tabs=visual-studio-code, but when I use the command dotnet aspnet-codegenerator controller -name MoviesController -m Movie -dc MvcMovie.Data.MvcMovieContext --relativeFolderPath Controllers --useDefaultLayout --referenceScriptLibraries --databaseProvider sqlite, I get this error message:

startIndex cannot be larger than length of string. (Parameter 'startIndex')
   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)

Here is information about my environment:

• My model file contains:

    using System.ComponentModel.DataAnnotations;
    
    namespace MvcMovie.Models;
    
    public class Movie
    {
        public int Id { get; set; }
        public string? Title { get; set; }
        [DataType(DataType.Date)]
        public DateTime ReleaseDate { get; set; }
        public string? Genre { get; set; }
        public decimal Price { get; set; }
    }

• My dotnet information:

    D:\MvcMovie> dotnet --info   
    .NET SDK:
     Version:           8.0.401
     Commit:            811edcc344
     Workload version:  8.0.400-manifests.b6724b7a
     MSBuild version:   17.11.4+37eb419ad
    
    Runtime Environment:
     OS Name:     Windows
     OS Version:  10.0.22631
     OS Platform: Windows
     RID:         win-x64
     Base Path:   C:\Program Files\dotnet\sdk\8.0.401\
    
    .NET workloads installed:
    Configured to use loose manifests when installing new manifests.
    There are no installed workloads to display.
    
    Host:
      Version:      8.0.8
      Architecture: x64
      Commit:       08338fcaa5
    
    .NET SDKs installed:
      8.0.401 [C:\Program Files\dotnet\sdk]
    
    .NET runtimes installed:
      Microsoft.AspNetCore.App 8.0.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
      Microsoft.NETCore.App 8.0.8 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
      Microsoft.WindowsDesktop.App 8.0.8 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.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

• My dotnet tool list:

    PS D:\MvcMovie> dotnet tool list -g
    Package Id                       Version      Commands
    -------------------------------------------------------------------------
    dotnet-aspnet-codegenerator      8.0.5        dotnet-aspnet-codegenerator
    dotnet-ef                        8.0.8        dotnet-ef
    dotnetsay                        2.1.7        dotnetsay

• My dotnet package list:

      D:\Users\User\Documents\selfreading\datacentric\MvcMovie> dotnet list package
    Project 'MvcMovie' has the following package references
       [net8.0]:
       Top-level Package                                       Requested   Resolved
       > Microsoft.EntityFrameworkCore.Design                  8.0.8       8.0.8
       > Microsoft.EntityFrameworkCore.SQLite                  8.0.8       8.0.8
       > Microsoft.EntityFrameworkCore.SqlServer               8.0.8       8.0.8
       > Microsoft.EntityFrameworkCore.Tools                   8.0.8       8.0.8
       > Microsoft.VisualStudio.Web.CodeGeneration.Design      8.0.5       8.0.5

I'm not sure what the issue is. Please help.

this is an Information of person who also have the same issue: https://stackoverflow.com/questions/74543076/dotnet-aspnet-codegenerator-controller-error-startindex-cannot-be-larger-than-le

Answer 1

--databaseProvider sqlite

Why "sqlite"?

"Scaffold movie pages" section in the tutorial will generate the application to use SQL Server.

If you want to use SQLite instead of SQL Server, you will have to do as follows:

(1) Complete the Part 1 through Part 4 up to "Scaffold movie pages" section. Do not do something else other than described in the tutorials.

(2) Add NuGet package Microsoft.EntityFrameworkCore.Sqlite.

(3) Change options.UseSqlServer to options.UseSqlte in Program.cs:

builder.Services.AddDbContext<MvcMovieContext>(options =>
    options.UseSqlte(
        builder.Configuration.GetConnectionString("MvcMovieContext") ?? 
        throw new InvalidOperationException("Connection string 'MvcMovieContext' not found.")));

(4) Change the connection string in appsettings.json to use SQLite.

(5) Perform Initial migration.

Answer 2

deleted as duplicated