iot/labs/Teacher/TeacherExt/Startup.cs

using Infrastructure.Data;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using System.Text.Encodings.Web;
using System.Text.Unicode;
using TeacherExt.Data;

namespace TeacherExt
{
    public class Startup
    {
        private readonly string _origins = "AllowAllHeaders";

        public Startup(IConfiguration configuration, IHostEnvironment hostEnvironment)
        {
            Configuration = configuration;
            HostEnvironment = hostEnvironment;
        }

        public IConfiguration Configuration { get; }
        public IHostEnvironment HostEnvironment { get; }

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddSingleton(HtmlEncoder.Create(UnicodeRanges.All));
            services.AddHttpContextAccessor();
            services.AddCors(options => options.AddPolicy(_origins,builder =>
            {
                builder.SetIsOriginAllowed(o => true)
                .AllowAnyMethod()
                .AllowAnyHeader()
                .AllowCredentials();
            }));
            var connstr = HostEnvironment.IsDevelopment() ? Configuration.GetConnectionString("sqlite") : Configuration.GetConnectionString("mysql");
            if (HostEnvironment.IsDevelopment())
            {
                services.AddDbContext<TeacherDbContext>(o => o.UseSqlite(connstr));

            }
            else
            {
                services.AddDbContext<TeacherDbContext>(o => o.UseMySql(connstr, ServerVersion.AutoDetect(connstr)));
            }
            services.AddScoped<DbContext, TeacherDbContext>();
            services.AddTransient(typeof(IRepository<>), typeof(EfRepository<>));
            services.AddControllersWithViews();
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
            }
            app.UseStaticFiles();
            app.UseRouting();
            app.UseCors(_origins);
            app.UseAuthorization();
            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllerRoute(
                    name: "default",
                    pattern: "{controller=Home}/{action=Index}/{id?}");
            });
            using var scope = app.ApplicationServices.CreateScope();
            using var db = scope.ServiceProvider.GetRequiredService<DbContext>();
            if (db.Database.EnsureCreated())
            {
            }
        }
    }
}