protected void dsReferralInsert_Inserted(object sender, ObjectDataSourceStatusEventArgs e)
{
    int intKey;
    if (int.TryParse(e.ReturnValue, out intKey))
    {
        Response.Redirect("ReferralDetail.aspx?ReferralID=" + intKey.ToString());
    }
}

void CustomerDetailsView_ItemInserted(Object sender,
    DetailsViewInsertedEventArgs e)
{
    var key = e.Values["Key"];

}