1, Call Transaction
Call Transaction: 就是直接调用Tcode进行数据批量导入。
优点：方便快捷，程序处理方便,同步更新时能实时得到BDC处理结果。
缺点：系统不能自动保存BDC 日志，需自己建透明表来维护数据，或者仅仅是将日志显示出来。
call transaction方法将数据归集到BDCDATA 结构的内表中，然后导入到系统中，通过BDCMSGCOLL结构返回BDC导入操作的成功与否消息。
BDCDATA结构中比较关键的几个字段解释：
PROGRAM - BDC module pool
DYNPRO- BDC Screen number
DYNBEGIN- BDC screen start
FNAM- Field name
FVAL- BDC field value
2, SHDB/SM35录屏
以FB09更改payment block为例，
2.1 Tcode SHDB进行录屏，
2.2 输入Document Number，Company Code，Fiscal Year，Line item，然后回车进入下一屏幕，
输入Pmnt Block ‘A'，然后保存
2.3 得到BDC录屏结果，可以按需要调整结果，并据此写BDC代码
3, 例子代码
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REPORT ztest_bdc_transaction.
* update payment block by BDC
DATA:git_bdcdata TYPE STANDARD TABLE OF bdcdata,
gwa_bdcdata LIKE LINE OF git_bdcdata,
git_messtab TYPE STANDARD TABLE OF bdcmsgcoll,
gwa_messtab LIKE LINE OF git_messtab,
gwa_ctu TYPE ctu_params.
REFRESH:git_bdcdata,
git_messtab.
* input document number
PERFORM frm_bdc_dynpro USING 'SAPMF05L' '0102'.
PERFORM frm_bdc_field USING 'RF05L-BELNR'
'016000000'.
PERFORM frm_bdc_field USING 'RF05L-BUKRS'
'3250'.
PERFORM frm_bdc_field USING 'RF05L-GJAHR'
'2015'.
PERFORM frm_bdc_field USING 'RF05L-BUZEI'
'1'.
PERFORM frm_bdc_field USING 'BDC_OKCODE'
'/00'.
* set payment block
PERFORM frm_bdc_dynpro USING 'SAPMF05L' '0302'.
PERFORM frm_bdc_field USING 'BSEG-ZLSPR'
'A'.
* save
PERFORM frm_bdc_field USING 'BDC_OKCODE'
'=AE'.
gwa_ctu-defsize = 'X'.
gwa_ctu-dismode = 'N'.
gwa_ctu-updmode = 'S'.
CALL TRANSACTION 'FB09' USING git_bdcdata
OPTIONS FROM gwa_ctu
MESSAGES INTO git_messtab.
LOOP AT git_messtab INTO gwa_messtab WHERE msgtyp = 'E'
OR msgtyp = 'X'
OR msgtyp = 'A'.
* error handling .....
ENDLOOP.
*----------------------------------------------------------------------*
* Start new screen *
*----------------------------------------------------------------------*
FORM frm_bdc_dynpro USING i_program
i_dynpro.
CLEAR gwa_bdcdata.
gwa_bdcdata-program = i_program.
gwa_bdcdata-dynpro = i_dynpro.
gwa_bdcdata-dynbegin = abap_true.
APPEND gwa_bdcdata TO git_bdcdata.
ENDFORM. "FRM_BDC_DYNPRO
*&---------------------------------------------------------------------*
*& Form FRM_BDC_FIELD
*&---------------------------------------------------------------------*
* text
*----------------------------------------------------------------------*
* -->P_1131 text
* -->P_LWA_CO07_BDgco_mATNR text
*----------------------------------------------------------------------*
FORM frm_bdc_field USING i_fnam
i_fval.
CLEAR gwa_bdcdata.
gwa_bdcdata-fnam = i_fnam.
gwa_bdcdata-fval = i_fval.
"delete leading zero
SHIFT gwa_bdcdata-fval LEFT DELETING LEADING space.
APPEND gwa_bdcdata TO git_bdcdata.
ENDFORM. " FRM_BDC_FIELD
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以上。