我需要从xls向XD02中的客户添加新的电子邮件地址。 没关系，但是，当我调用方法cmd_ei_api => maintain_bapi时 这确实改变了电子邮件，但是删除了XD02上的所有电子邮件，这不是我想要的，我想添加新的电子邮件并将其设置为默认值，但是我想保留旧的电子邮件。
我的代码：
FORM data_to_bapi.
DATA: gs_correct TYPE cmds_ei_main,
gt_customers TYPE cmds_ei_main,
gs_address TYPE bapiad1vl,
gs_addressx TYPE bapiad1vlx,
gs_company_code_st TYPE cmds_ei_company,
gs_company_code TYPE cmds_ei_cmd_company,
gt_smtp TYPE cvis_ei_smtp_t,
gs_smtp LIKE LINE OF gt_smtp,
gs_comm TYPE cvis_ei_cvi_communication,
gs_customers TYPE cmds_ei_extern,
gs_defective TYPE cmds_ei_main,
gs_msg_correct TYPE cvis_message,
gs_msg_error TYPE cvis_message,
iv_test_run TYPE c.
LOOP AT lt_data INTO wa_data.
"Controlo
gs_customers-header-object_instance-kunnr = wa_data-kunnr. "kunnr
gs_customers-header-object_task = 'U'. "Update this kunnr
gs_smtp-contact-task = 'I'. " Insert New Email
gs_smtp-contact-data-e_mail = wa_data-email. " New email
gs_smtp-contact-datax-e_mail = 'X'.
APPEND gs_smtp TO gt_smtp.
gs_comm-smtp-smtp = gt_smtp[].
gs_customers-central_data-address-communication = gs_comm.
gs_customers-central_data-address-task = 'I'. " Insert new communication
APPEND gs_customers TO gt_customers-customers.
**********************************************************************
* CALL BAPI *
**********************************************************************
CHECK gt_customers-customers IS NOT INITIAL.
gv_collect_messages = abap_true.
cmd_ei_api=>initialize( ).
iv_test_run = ' '.
CALL METHOD cmd_ei_api=>maintain_bapi
EXPORTING
iv_test_run = iv_test_run
iv_collect_messages = gv_collect_messages
is_master_data = gt_customer
" Master Data
IMPORTING
es_master_data_correct = gs_correct
es_message_correct = gs_msg_correct
es_master_data_defective = gs_defective
es_message_defective = gs_msg_error.
CALL FUNCTION 'BAPI_TRANSACTION_COMMIT'
EXPORTING
wait = 'X'.
CLEAR wa_data.
ENDLOOP.
ENDFORM. "data_to_bapi
谢谢！