如何制作DbSet的通用方法？

Question

I have many simular meyhod like this two:

    public static List<MyCatalogViewModel> LoadCatalog1(...)
    {
       var catalog= DbContext.MyContexClass1.Where(t => !t.Deleted).Select(k=> new MyCatalogViewModel{ Id= k.Id, Name = k.Name}).ToList();
       return catalog;
    }

    public static List<MyCatalogViewModel> LoadCatalog2(...)
    {
       var catalog= DbContext.MyContexClass2.Where(t => !t.Deleted).Select(k=> new MyCatalogViewModel{ Id= k.Id, Name = k.Name}).ToList();
       return catalog;
    }

Here is i take data from DbContext . Difference only in DBSet<> .
How can i make a generic method instead of this methods?

Classes MyContexClass2 and MyContexClass1 both have a properties Id and Name . And looks like:

public partial class MyContexClass1: AccountableDbObject
{
    public MyContexClass1()
    {
      <..some code..>
    }

    public override int Id{ get; internal set; }
    public string Name { get; set; }

     <...Another properties...>
}

Answer 1

The DbContext has a Set<T> method that allows retrieving a set of arbitrary entities (aslong as their type is registered with the context).

Update

To actually use the properties defined on these generic types, you need the model classes to implement a common interface:

public interface ICatalogItem { //or some other name 
      bool Deleted { get; }
      int Id { get; }
      string Name { get; }
}

Eg your MyContexClass1 definition would become

MyContexClass1 : AccountableDbObject, ICatalogItem

Now you can build a generic method that will return the appropriate viewmodels:

public static List<MyCatalogViewModel> LoadCatalog<T>()
    where T : class, ICatalogItem
{
   var catalog= DbContext.Set<T>.Where(t => !t.Deleted).Select(k=> new MyCatalogViewModel{ Id= k.Id, Name = k.Name}).ToList();
   return catalog;
}