Entity Framework : Entity from a View

in my database a have an invoice table and a payment table. i have a transactions view that shows payments and invoices. i created an entity from that tra开发者_开发百科nsaction view.

in my application i want to be able to add a payment from the transaction screen (which is a datagrid of transaction entities) and that the list of transactions be updated.

right now I can achieve this by saving the changes and refreshing the entity list.

Is there a way to do this without saving changes to the db ? like temporarily adding the payment to the transaction view ?