Startup.cs

public void ConfigureServices(IServiceCollection services)

  //分库分表映射类别
            if (_configuration.GetValue<string>("dbTableEs:mapperType") == "elasticsearch")
            {
                services.AddSingleton<IDbTableEs, DbTableEsProvider>();
            }
            else
            {
                services.AddSingleton<IDbTableEs, DbTableEsDefaultProvider>();
            }