there was an error running the selected code generator in .net6

Question

I use .net 6 and when I use Add an ASP.NET Core MVC controller with views, using Entity Framework Core(I do this in Area). I get an error.

I searched a lot but did not find any

error:

DBContext:

namespace PotLearn.DataLayer.Context
{
    public class PotLearnContext:DbContext
    {
        public PotLearnContext(DbContextOptions<PotLearnContext> options)
    : base(options)
        {
        }
        #region User
        public DbSet<User> Users { get; set; }
        #endregion

    }
}

program.cs:

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddControllersWithViews();
#region DataBase Context
    var connectionString = builder.Configuration.GetConnectionString("PotLearnConnection");
    builder.Services.AddDbContext<PotLearnContext>(options => options.UseSqlServer(connectionString));
#endregion
var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Home/Error");
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}




app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

app.UseAuthorization();

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");
app.UseEndpoints(endpoints =>
{
    endpoints.MapControllerRoute(
      name: "areas",
      pattern: "{area:exists}/{controller=Home}/{action=Index}/{id?}"
    );
});

app.Run();

How can I fix this error?

Thankyou.

Answer 1

This is issue seems to be version issue. Your .NET 6.0 is not matching with the version with Web.CodeGeneration.

SOLUTION - 1: Go to NuGet package Manager (Tools > NuGet Package Manager > Manage NuGet packages for solution). Then go to Updates and update the packages showing in it.

SOLUTION - 2: Clean and Rebuild your whole Solution, NOT just the project.

SOLUTION - 3:- If SOLUTION - 1 is not working then go to Browse tab and then search for Microsoft.VisualStudio.Web.CodeGeneration and based on your .NET project, install the version by selecting the version number.

Hope this helps.