Question

我被告知以下是在asp.net core 2.0中播种数据库的正确方法，即必须在program.cs中完成。

我想从文件系统中的CSV文件中播种数据库。但是，我无法想象在Main函数中访问内容根或Web根等。

        //Program. cs
        public class Program
        {
            public static void Main(string[] args)
            {
                var host = BuildWebHost(args);
                using (var scope = host.Services.CreateScope())
                {
                    var services = scope.ServiceProvider;
                    try
                    {
                        var context = services.GetRequiredService<EventContext>();

                       // => How can I get the webrootpath here to pass to the seed function? 
                       // => I cannot figure how to access the HostingEnvironment
                       DbInitialize.Seed(context);
                    }
                    catch (Exception ex)
                    {
                        ....
                    }
                }
                host.Run();
            }

            public static IWebHost BuildWebHost(string[] args) =>
                WebHost.CreateDefaultBuilder(args)
                    .UseStartup<Startup>()
                    .Build();
        }

Answer 1

不确定您是否已获得答案或找到解决方案，但不确定我们在项目中所做的事情。

public class SeedData
{
    public static void Seed(IServiceProvider serviceProvider)
         {
       using (var serviceScope = serviceProvider.GetRequiredService<IServiceScopeFactory>().CreateScope())
            {
                var env = serviceScope.ServiceProvider.GetRequiredService<IHostingEnvironment>();
                var webRoot = env.WebRootPath;


            }//end using scope
        }// end class

和用法

public class Program
{
    public static void Main(string[] args)
    {            
        var isSeed = args.Contains("/seed");            
        if (isSeed)
        {
            args = args.Except(new[] { "/seed" }).ToArray();
        }

        var host = BuildWebHost(args);

        if (isSeed)
        {               
            SeedData.EnsureSeeded(host.Services); 
        }

        host.Run();

    }

    public static IWebHost BuildWebHost(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
            .UseStartup<Startup>()
            .Build();
}

如何在Program.cs中的asp.net core 2中获取webrootpath

1 个答案: