I Created an asp.net core project And I selected UseIndiviualUserAccount As My AutenticationType, After preparing project by visual studio i got some prebuilt class and controller, Obviously i got migration folder and its config since i dont want to use defulat structure of asp.net core ,i deleted the migration folder and i created a new class library and i Rename it to MyProject.Core. in MyProject.Core Class Library i create my db models and dbContext classes,so i need to run the add-migration "init" command for creating my database so i did but i got below error, Note : i am running the add migration command in Myproject.Core in PMC !! Unable to create an object of type 'ApplicationDbContext'. Add an implementation of 'IDesignTimeDbContextFactory' to the project, or see https://go.microsoft.com/fwlink/?linkid=851728 for additional patterns supported at design time.
how can i fix this error, i read some article in current site and the other website but i cant fix my problem.
public class Program
{
public static void Main(string[] args)
{
BuildWebHost(args).Run();
}
public static IWebHost BuildWebHost(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>()
.Build();
}
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddTransient<IUnitOfWork, UnitOfWork>();
services.AddTransient<IProvinceRepository, ProvinceRepository>();
services.AddTransient<IBrandRepository, BrandRepository>();
services.AddDbContext<ApplicationDbContext>(options =>
options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
services.AddIdentity<ApplicationUser, IdentityRole>()
.AddEntityFrameworkStores<ApplicationDbContext>()
.AddDefaultTokenProviders();
// Add application services.
services.AddTransient<IEmailSender, EmailSender>();
services.AddMvc();
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
if (env.IsDevelopment())
{
app.UseBrowserLink();
app.UseDeveloperExceptionPage();
app.UseDatabaseErrorPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
}
app.UseStaticFiles();
app.UseAuthentication();
app.UseMvc(routes =>
{
routes.MapRoute(
name: "default",
template: "{controller=Home}/{action=Index}/{id?}");
});
}
}
public class ApplicationDbContext : IdentityDbContext<ApplicationUser,ApplicationRole,string>
{
public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options): base(options)
{
}
static ApplicationDbContext()
{
// Set the database intializer which is run once during application start
// This seeds the database with admin user credentials and admin role
// Database.SetInitializer<ApplicationDbContext>(new ApplicationDbInitializer());
}
