Masoud Masoud - 3 months ago 15
C# Question

Find a specified generic DbSet in a DbContext dynamically when I have an entity

I have following classes and

DbContext
:

public class Order:BaseEntity
{
public Number {get; set;}
}
Product:BaseEntity;
{
public Name {get; set;}
}

public class Context : DbContext
{
....
public DbSet<Order> Orders { set; get; }
public DbSet<Product> Products { set; get; }
....
}


I have a list of objects that want to add to my context, too, but I don't know how can I find appropriate generic
DbSet
according each entity type dynamically.

IList<BaseEntity> list = new List<BaseEntity>();
Order o1 = new Order();
o1.Numner = "Ord1";
list.Add(o1);

Product p1 = new Product();
p1.Name = "Pencil";
list.Add(p1);

Context cntx = new Context();
foreach (BaseEntity entity in list)
{
cntx.Set<?>().Add(entity);
}


How can I do that?

Answer

DbContext has a method called Set, that you can use to get a non-generic DbSet, such as:

var someDbSet = this.Set(typeof(SomeEntity));

So in your case:

foreach (BaseEntity entity in list)
{
      cntx.Set(entity.GetType()).Add(entity);         
}