Web Dynpro for ABAP(8):Service Calls

3.12 Service Calls

调用已经存在的function以及Class的方法。

1.创建Service Call

2.使用Service Call

选择Component->右键->Create->Service call

 

使用已有Component Controller

 

 

 

 

这里可以选择将function的参数创建为method的parameter或者controller的attributes或者context node，context attributes。

 

默认创建完成Component Controller会创建一个method: EXECUTE_BAPI_FLIGHT_GETLIST

示例代码:

* declarations for context navigation
  DATA lo_element TYPE REF TO if_wd_context_element.
  DATA lt_elements TYPE wdr_context_element_set.
* declarations for parameters
* get all involved child nodes
* get input from context
* the invocation - errors are always fatal !!!
  CALL FUNCTION 'BAPI_FLIGHT_GETLIST'
"   EXPORTING
"      airline =                         wd_this->airline
"      destination_from =                wd_this->destination_from
"      destination_to =                  wd_this->destination_to
"      max_rows =                        wd_this->max_rows
"   TABLES
"      date_range =
"      extension_in =
"      flight_list =
"      extension_out =
"      return =
  .
* store output to context