List<> of objects, different types, sort and pull out types individually?
- by Brazos
I've got a handful of products, any, all, or none of which may be associated with a specific submission. All 7 products are subclasses of the class Product. I need to store all the products associated with a submission, and then retrieve them and their field data on my presentation layer. I've been using a List, and List, but when I use the OfType, I throw an error saying that I can't implicitly convert systems.generic.IEnumerable to type 'Product'. I've tried to cast, but to no avail.
When I use prodlist.OfType<EPL>(); there are no errors, but when I try and store that in an instance of EPL "tempEpl", I get the aforementioned cast-related error. What gives? Code below.
ProductService pserv = new ProductService();
IList<object> prodlist = pserv.getProductById(x);
EPL tempEpl = new EPL();
if ((prodlist.OfType<EPL>()) != null)
{
tempEpl = prodlist.OfType<EPL>(); // this throws a conversion error.
}
the Data layer
List<object> TempProdList = new List<object>();
conn.Open();
SqlCommand EplCmd = new SqlCommand(EPLQuery, conn);
SqlDataReader EplRead = null;
EplRead = EplCmd.ExecuteReader();
EPL TempEpl = new EPL();
if (EplRead.Read())
{
TempEpl.Entity1 = EplRead.GetString(0);
TempEpl.Employees1 = EplRead.GetInt32(1);
TempEpl.CA1 = EplRead.GetInt32(2);
TempEpl.MI1 = EplRead.GetInt32(3);
TempEpl.NY1 = EplRead.GetInt32(4);
TempEpl.NJ1 = EplRead.GetInt32(5);
TempEpl.PrimEx1 = EplRead.GetInt32(6);
TempEpl.EplLim1 = EplRead.GetInt32(7);
TempEpl.EplSir1 = EplRead.GetInt32(8);
TempEpl.Premium1 = EplRead.GetInt32(9);
TempEpl.Wage1 = EplRead.GetInt32(10);
TempEpl.Sublim1 = EplRead.GetInt32(11);
TempProdList.Add(TempEpl);
}
