ASP.NET Core 常用配置

常用词汇:

GUID: 默认值设置 有序：NEWSEQUENTIALID()  无序：NEWID()

1.1.根据数据库生成实体类和数据连接,放在实体类所在项目生成,几乎不用改动,更方便.

Scaffold-DbContext "Server=(localdb)\mssqllocaldb;Database=Blogging;Trusted_Connection=True;" Microsoft.EntityFrameworkCore.SqlServer -OutputDir Test

1.2startup数据库连接配置与appsettings.json配置

        public StartupDevelopment(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }



services.AddDbContext<MyContext>(options => options.UseSqlServer(Configuration.GetConnectionString("MyContext")));

{
  "Logging": {
    "IncludeScopes": false,
    "LogLevel": {
      "Default": "Warning"
    }
  },
  "ConnectionStrings": {
    "MyContext": "Server=.;Database=BlogDemo;Trusted_Connection=True;MultipleActiveResultSets=true"

  }

}

1.HTTPS  HSTS

 services.AddHttpsRedirection(options =>
            {
                options.RedirectStatusCode = StatusCodes.Status307TemporaryRedirect;
                options.HttpsPort = 5001;
            });

            services.AddHsts(options =>
            {
                options.Preload = true;
                options.IncludeSubDomains = true;
                options.MaxAge = TimeSpan.FromDays(60);
                options.ExcludedHosts.Add("example.com");
                options.ExcludedHosts.Add("www.example.com");
            });

2. .UseStartup<Startup>(); 使用基于环境的类

 .UseStartup(typeof(StartupDevelopment).GetTypeInfo().Assembly.FullName);

3.表为空填写默认数据,在program.cs修改如下

            // CreateWebHostBuilder(args).Build().Run(); 将词句注释掉,
            var host= CreateWebHostBuilder(args).Build();
            using (var scope=host.Services.CreateScope())
            {
                var services = scope.ServiceProvider;
                var loggerFactory = services.GetRequiredService<ILoggerFactory>();
                try
                {
                    var myContext = services.GetRequiredService<MyContext>();
                    MyContextSeed.SeedAsync(myContext, loggerFactory).Wait();
                }
                catch (Exception e)
                {
                    var logger = loggerFactory.CreateLogger<Program>();
                    logger.LogError(e,"填写默认数据失败");
                }
            }

                host.Run();

3.2数据表为

namespace BlogDemo.Infrastructure.Database
{
    public class MyContextSeed
    {
        public static async Task SeedAsync(MyContext myContext,
                          ILoggerFactory loggerFactory, int retry = 0)
        {
            int retryForAvailability = retry;
            try
            {
                // TODO: Only run this if using a real database
                // myContext.Database.Migrate();

                if (!myContext.Posts.Any())
                {
                    myContext.Posts.AddRange(
                        new List<Post>{
                            new Post{
                                Title = "Post Title 1",
                                Body = "Post Body 1",
                                Author = "Dave",
                                LastModified = DateTime.Now
                            },
                            new Post{
                                Title = "Post Title 2",
                                Body = "Post Body 2",
                                Author = "Dave",
                                LastModified = DateTime.Now
                            },
                            new Post{
                                Title = "Post Title 3",
                                Body = "Post Body 3",
                                Author = "Dave",
                                LastModified = DateTime.Now
                            }
                        }
                    );
                    await myContext.SaveChangesAsync();
                }
            }
            catch (Exception ex)
            {
                if (retryForAvailability < 10)
                {
                    retryForAvailability++;
                    var logger = loggerFactory.CreateLogger<MyContextSeed>();
                    logger.LogError(ex.Message);
                    await SeedAsync(myContext, loggerFactory, retryForAvailability);
                }
            }
        }
    }
}