Display Method on a DataSource, in a Grid Control

Hi,

we tried to use a display method on a datasource ( because we have a temporary table and we don't save the data until we close the form) in this scenario:

in a grid control, on a Id field, we open a lookup form, select a record from the other table, and then , in a string edit control bound to the datasource and having the datamethod property bound to the displaymethod created on the datasource, I want to display something similar to the name of a customer.

The problem is that when we add records in the grid, with CTRL-N, after selecting a new value for the Ident field, the displayed value is changed on every row.

If I move on another row in the grid, the corresponding value is displayed on all the rows.

Here is the code for my display method:

display str dispDebitor()
{
    simtDebitor deb;
    ;
 
    select nume, prenume from deb where deb.Ident == simtcotetmp.IdDebitor; 

    return deb.Nume;

}

Thanks a lot!