EntityFramework 7，遷移和ConnectionString

Startup.cs下面的代碼將在啟動時應用數據庫遷移。

    public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
    {

        // other app setup omitted.

        if (env.IsDevelopment())
        {
            // development settings here.
            app.UseDeveloperExceptionPage();
        }
        else
        {
            // production settings here.
            try
            {
                using (var serviceScope = app.ApplicationServices.GetRequiredService<IServiceScopeFactory>()
                                             .CreateScope())
                {
                    serviceScope.ServiceProvider.GetService<YourDbContext>()
                                .Database.Migrate();
                }
            }
            catch
            {
                // ignored
            }
        }
    }