BDC Data transfer - Session method...?

Question

Dear All,
How to Transfer data using BDC Session method? - Step-by-step Process.
Regards,
Dharmesh

Answer 1

hi,
this will be usefull to u
2.1.     Steps for submitting data for Batch Processing
1.     Analyze the transactions for which a BDC program.
The user has to determine the sequence of screens in the transactions and the information   about all the fields in every screen. To do this the user must run the transaction .
Then select System  Status. This will give the screen number and the module pool associated with this screen of the transaction. These two are the most important fields that     the user would need in order to write the BDC program.
2.     Use transaction SE38 to write the BDC program. This ABAP/4 program should reads the  external data that is to be entered in the SAP System and stores the data in a "batch-input session." A session stores the actions that are required to enter data using normal SAP transactions.  This is done by basically using three functions:
   BDC_OPEN_GROUP
   BDC_INSERT
   BDC_CLOSE_GROUP.
3.     To create a batch input session, use the function BDC_OPEN_GROUP. This function has the following 5 parameters :
a.     CLIENT which is by default set to SY_MANDT. It is the client in which the session is to be processed.
b.     GROUP which is the name of the BDC session. This parameter is important because it is with this name that the user will recognize the BDC session in the batch input queue. Using this name process the BDC session.
c.     USER which is usually set to SY-UNAME. It is the user name for starting the session in background.
d.     KEEP indicates whether the session should be kept or deleted after processing. If ‘ ‘ then the session is deleted. If ‘X’ then the session is retained even after it is successfully processed without any errors.          
e.     HOLDDATE Lock date.  The session is locked and may not be processed until after the date that is specified. Default:  No lock date, session can be processed immediately.  A lock date is optional.
4.     Populate the bdcdata table .
      The user may define the table as  follows:
      DATA: BEGIN OF BDCDATA OCCURS 0.
                  INCLUDE STRUCTURE BDCDATA.
      DATA: END OF BDCDATA.
      This bdcdata structure has the following fields:
•      PROGRAM
Name of the program.
•      DYNPRO
Number of the screen.  Set this field only in the first record for the screen.
•      DYNBEGIN
Indicates the first record for the screen.  Set this field to X only in the first record for the screen. (Reset to ' ' (blank) for all other records.)
•      FNAM
Name of a field in the screen.  The FNAM field is not case-sensitive.
•      FVAL
Value for the field named in FNAM. 
5.     The next step is to submit the BDC session. Use the BDC_INSERT function module to add a transaction to a batch input session.  Specify the transaction that is to be started in the call to BDC_INSERT.
      BDC_INSERT takes the following parameters:
•      TCODE
The code of the transaction that is to be run. TCODE is an EXPORTING parameter in the function module.
•      DYNPROTAB
The BDCDATA structure that contains the data that is to be processed       by the transaction. DYNPROTAB is a tables parameter in the function       module.
6.     The final step is to close the BDC session. Use the BDC_CLOSE_GROUP function module to close a session. Once a session is closed, it can be processed.
7.     Running this program will create a batch input session by the name that is specified in the GROUP parameter in the BDC_CREATE_GROUP function call.
8.     Transaction SM35 can be used to process the submitted session. This transaction can be used to check the status of all BDC sessions.
2.2.     Summary: Creating Batch Input Session:
•     Open Batch Input group
    CALL FUNCTION 'BDC_OPEN_GROUP'   
    EXPORTING
          CLIENT = SY-MANDT
          GROUP  = GROUP
          USER   = USER
          KEEP   = KEEP.
•     Fill in the Data for Transaction in an internal table 'BDCDATA'
        FORM INSERT_SCREEN USING PROGRAM DYNPRO.
           CLEAR BDCDATA.
           BDCDATA-PROGRAM = PROGRAM.
           BDCDATA-DYNPRO  = DYNPRO.
           BDCDATA-DYNBEGIN = 'X'.
           APPEND BDCDATA.
        ENDFORM.
        FORM INSERT_FIELD USING FNAM FVAL.
           CLEAR BDCDATA.
           BDCDATA-FNAM = FNAM.
           BDCDATA-FVAL = FVAL.
           APPEND BDCDATA.
        ENDFORM.
•     Insert Transacton
        CALL FUNCTION 'BDC_INSERT'   
        EXPORTING
            TCODE     = 'ME21'
        TABLES
          DYNPROTAB = BDCDATA.
•     Close Batch Input group
        CALL FUNCTION 'BDC_CLOSE_GROUP'.
Finally to process Batch Input Session, first execute the BDC ABAP. This will create
a BDC session. Run transaction 'SM35' & processes the BDC session.
regards,
padma.