学习

首先我们需建立两个子程序，BDC_SCREEN是来存入Program，Dynpro和Dynbegin

   三个字段，也就是输入画面的程序名称及Screen Number，BDC_FIELD:用来存入

   Fnam及Fval两个字段，也就是输入画面所需填入的各个字段内容，程序内容如:

* Add BDC Screen Field Data

FORM BDC_SCREEN TABLES P_BDC STRUCTURE BDCDATA

     USING P_PROGRAM P_SCREEN.

  CLEAR  P_BDC.

  P_BDC-PROGRAM  =  P_PROGRAM.

  P_BDC-DYNPRO   =  P_SCREEN.

  P_BDC-DYNBEGIN = 'X'.

  APPEND  P_BDC.

ENDFORM.

* Add BDC Field Data

FORM BDC_FIELD TABLES P_BDC STRUCTURE BDCDATA

     USING P_NAME  P_VALUE.

  CLEAR P_BDC.

  CASE  P_VALUE.

    WHEN ''.

    WHEN OTHERS.

      P_BDC-FNAM  =  P_NAME.

      P_BDC-FVAL  =  P_VALUE.

      APPEND  P_BDC.

  ENDCASE.

ENDFORM.