An error occurred while starting the application.

ArgumentException: AddDbContext was called with configuration, but the context type 'NewsContext' only declares a parameterless constructor. This means that the configuration passed to AddDbContext will never be used. If configuration is passed to AddDbContext, then 'NewsContext' should declare a constructor that accepts a DbContextOptions<NewsContext> and must pass it to the base constructor for DbContext.

Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.CheckContextConstructors<TContext>()

ArgumentException: AddDbContext was called with configuration, but the context type 'NewsContext' only declares a parameterless constructor. This means that the configuration passed to AddDbContext will never be used. If configuration is passed to AddDbContext, then 'NewsContext' should declare a constructor that accepts a DbContextOptions<NewsContext> and must pass it to the base constructor for DbContext.

Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.CheckContextConstructors<TContext>()

Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.AddDbContext<TContextService, TContextImplementation>(IServiceCollection serviceCollection, Action<IServiceProvider, DbContextOptionsBuilder> optionsAction, ServiceLifetime contextLifetime, ServiceLifetime optionsLifetime)

Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.AddDbContext<TContextService, TContextImplementation>(IServiceCollection serviceCollection, Action<DbContextOptionsBuilder> optionsAction, ServiceLifetime contextLifetime, ServiceLifetime optionsLifetime)

Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.AddDbContext<TContext>(IServiceCollection serviceCollection, Action<DbContextOptionsBuilder> optionsAction, ServiceLifetime contextLifetime, ServiceLifetime optionsLifetime)

News.Startup.ConfigureServices(IServiceCollection services) in Startup.cs

+

            services.AddDbContext<NewsContext>(options =>

Microsoft.AspNetCore.Hosting.ConventionBasedStartup.ConfigureServices(IServiceCollection services)

Microsoft.AspNetCore.Hosting.Internal.WebHost.EnsureApplicationServices()

Microsoft.AspNetCore.Hosting.Internal.WebHost.Initialize()

Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication()

using Microsoft.EntityFrameworkCore;

namespace News.Service

{

    public class NewsContext : DbContext

    {

        public DbSet<News.Model.Entity.News> News { get; set; }

        public DbSet<News.Model.Entity.Banner> Banner { get; set; }

        public DbSet<News.Model.Entity.Comment> Comment { get; set; }

        public DbSet<News.Model.Entity.NewsClassify> NewsClassify { get; set; }

    }

}

 public void ConfigureServices(IServiceCollection services)

        {

            ......

            services.AddDbContext<NewsContext>(options =>

            {

              options.UseSqlServer(Configuration.GetConnectionString("MsSqlConnection"), db => db.UseRowNumberForPaging());

            });

            ......

        }

using Microsoft.EntityFrameworkCore;

namespace News.Service

{

    public class NewsContext : DbContext

    {

        public NewsContext(DbContextOptions<NewsContext> options) : base(options)

        {

        }

        public DbSet<News.Model.Entity.News> News { get; set; }

        public DbSet<News.Model.Entity.Banner> Banner { get; set; }

        public DbSet<News.Model.Entity.Comment> Comment { get; set; }

        public DbSet<News.Model.Entity.NewsClassify> NewsClassify { get; set; }

    }

}