Hi guys,

I am new to nhibernate. I have a simple customer table with ID and Name column. I have done all the nhibernate mapping and every thing is working fine. The layout of the form is i have a text box which accepts customer name, there are three buttons Save, Clear and Delete. There is a datagridview control on the form which shows existing records from customer table.
While loading the form system gets customer collection through nhibernate and displays in grid.
Save button is creates a new customer object and save it.
Delete button deletes selected customer.
Clear button deletes all the customers.

My grid is editable.
If i change something in the grid and then goto customer textbox type some value and click on save button then system creates a new customer with the name i typed in the textbox ( till this point is fine) and it also saves the changes i made in the grid.

Now my question is how i can avoid saving grid data. I know if disable grid then user will not be able to edit, but i want to save only newely added record.

Here is the code i am using to save new entity object which also saves the grid data

private void button1_Click(object sender, EventArgs e)
{
Customer c = new Customer();

using (ITransaction tx = session.BeginTransaction())
{
c.Name = txtName.Text;
object obj = session.Save(c);
tx.Commit();
MessageBox.Show(c.ID.ToString());
FillGrid();
}
}

The other objects are probably still in the session. You can clear the session after loading.

Can anybody explain solution to this problem, it would be nice to add some example...

thanks,
Naim

After the first fetch, close the session, this should cause all other objects to be detached, since you do not want any update this should be fine.


An other approach would be to mark those properties as immutable so they can be filled only once and not be updated.

set update to false