How to get parent and child table title using nested foreach loop in entity framework

Question

I have one Parent table and its child table.I have to display title from parent and child table on page as given below in MVC project:

Answer 1

Assume that parent is User and Product is their childs. Here is your entities.

public class User {
  public int Id {get; set;}
  public string Name {get; set;}
}

public class Product {
  public int Id {get; set;}
  public string Name {get; set;}

  //user who created this product
  public int UserId {get; set;}
}

You can create viewmodel and collect your data to show:

public class ProductUserViewModel {
  public User User {get; set;}
  public List Products {get; set;}
}

In action collect data:

public ActionResult GetAllUsersAndTheirProducts()
{
   var allUsers = db.UserTable.ToList();

   List result = new List();
   foreach(var user in allUsers)
   {
       ProductUserViewModel model = new ProductUserViewModel();
       model.User = user;
       model.Products = db.ProductTable.Where(e=>e.UserId == user.Id).ToList();
       result.Add(model);
   }

   return View(result);
}

And In view:

@model IEnumerable

foreach(var item in Model)
{
   
@item.User.Name
   foreach(var product in item.Products)
   {
     
@product.Name
   }
}