1. 錯誤描述 :no database provider has been configured fot this DbContext.sql
此類錯誤是上下文的註冊形成的.解決方式在DBContext中重寫OnConfiguring方法去注入數據庫鏈接.數據庫
DbContext中:ide
public static string ConnectionString { get; set; } protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) { optionsBuilder.UseSqlServer(ConnectionString); base.OnConfiguring(optionsBuilder); }
在Startup.cs中sqlserver
public void ConfigureServices(IServiceCollection services) { // Add framework services. var sqlserverConnection = Configuration.GetConnectionString("SQLServerConnection"); DbContext.ConnectionString = sqlserverConnection;//將配置鏈接傳入DbContext中 services.AddDbContext<DbContext>(options => options.UseSqlServer(sqlserverConnection)); services.AddMvc(); }
2.錯誤描述:Could not add Model type XXX to DbContextui
錯誤描述沒有註冊DbSet屬性.但其實是有 public DbSet<XXX> XXX{ get; set; }註冊的.將DbSet<XXX>中的類改爲<命名空間+類名>這種完整聲明便可解決this