Get Record ID in Entity Framework after insert

I'm developing an ASP.net application using Entity Framework. I'm using DetailsView to insert data into database. There is a table as Client and its primary key is client_id. client_id is auto generated by database. I need to get auto generated client_id after inserting a record into Client table and assign it to a hidden field for future use.

I searched about this and I found lot of solutions. But I don't know how to use them since I'm new to asp.net. I found that Entity Framework automatically populates business objects with the db-generated values after call SaveChanges(). My question is where should I call this in my partial class ? What is the event ?

I'm using DetailsView with EntityDataSource and binding EntityDataSource directly with Entity Model, so I'm not creating objects to insert data.

This is what I'm looking for.

in partial class

protected void clientDataSource_OnInserted(object sender, EntityDataSourceChangedEventArgs e )
{

    int newPrimaryKey = ((Client)e.Entity).ClientId;
    Debug.WriteLine(" Client ID is " + newPrimaryKey);

}

and added below line in EntityDataSource in aspx page.

OnInserted="clientDataSource_OnInserted"