实体框架-无法引用实体上下文

Question

上下文：

public class EntityContext : DbContext
{
   public EntityContext(DbContextOptions options) : base(options)
      {

      }

   protected override void OnModelCreating(ModelBuilder modelBuilder)
      {
          var cascadeTables = modelBuilder.Model.GetEntityTypes()
           .SelectMany(foreignKeysTables => foreignKeysTables.GetForeignKeys())
           .Where(foreignKeysTables => !foreignKeysTables.IsOwnership &&
                  foreignKeysTables.DeleteBehavior == DeleteBehavior.Cascade);

         foreach (var table in cascadeTables)
         {
             table.DeleteBehavior = DeleteBehavior.Restrict;
         }

         base.OnModelCreating(modelBuilder);
     }

    DbSet<Account> Accounts { get; set; }
}

使用上下文保存到数据库中：

using (var context = new EntityContext()) //error on EntityContext()
{
     context.Account.Add(acc); //error on Account because EntityContext can't be referenced
     context.SaveChanges();
}

我无法引用上下文，因为有一个参数需要它（DbContextOptions选项），如何才能通过它，以便保存我的Account实例？

谢谢。

Answer 1

您可以使用依赖项注入（构造函数注入），如

public class YourClass {
    private readonly EntityContext context; 
    public YourClass(EntityContext context) {
        this.context = context;
    }

    public void YourMethod(){
       context.Account.Add(acc);
       context.SaveChanges();
    }
}