How to exclude user defined field on Contex.InsertOnSubmit() in LINQ-To-SQL?

Question

I have table CustomerPurchase and equivalent data class DBML file also created. In this, DBML class, I have added my Custom field ' TotalAmount ' for calculations to show in the Listivew. but InsertOnSubmit(), it is throwing an error as Invalid column name ' TotalAmount '.

How can I exclude this user defined field while submit?

Answer 1

If you look inside the dbml file, you can see it is generate partial classes , so you can some partial classes to your entities, and create other properties, like TotalAmount you need. There you can access other properties and make calculated property, for sample:

namespace YourEntityNameSpace
{
    public partial class CustomerPurchase 
    {
        public double TotalAmount
        { 
            get
            {
                // your code goes here to calculate, for sample:
                return UnitPrice * Amount;
            }
        }
    }
}