web dynpro for abap fix for tutorial 6

Web Dynpro for ABAP:

Fix for Tutorial 6 – Component Usage

By Bruno Esperança

04.05.2012

Web Dynpro for ABAP: Fix for Tutorial 6 – Component Usage 2

Context

Web dynpro is becoming increasingly popular, and demand for experts in this area is on the rise. Due to this, many developers are training themselves around web dynpros, both for abap and java. One very well known group of tutorials is the one in SCN provided by Antje Boehm-Peters and Razi Mateen of SAP NetWeaver Product Management. To get there you can follow the link http://scn.sap.com/docs/DOC-8863 and you will be presented with Web Dynpro for ABAP: Tutorials for Beginners. In this group of tutorials you are presented with six different tutorials. Following and completing them is pretty straightforward, however I did come across a small “glitch” in tutorial 6 – component usage. It seems that my system did not have the reusable component necessary to complete this tutorial, component TECHED_05S_CUSTOMER_DATA. I googled around the internet and it seemed others were facing the same problem and were having a hard time working around this problem, so I took the initiative to investigate how to solve this problem and write this “fix” for it. I hope you will find it valuable.

http://scn.sap.com/docs/DOC-8863

04.05.2012


Procedure

1. Creating a new component ......................................................................................... 4

2. Creating the attributes in the component controller’s context ................................... 4

3. Map the component’s context to the view’s context .................................................. 4

4. Creating the layout ..................................................................................................... 5

5. Creating the method ................................................................................................... 6

6. Save it and activate everything! ................................................................................. 8

04.05.2012


1. Creating a new component

Start by creating a new component and name it whatever you like. I named it ZZ_00_CUSTDISPLAY. I entered the same name for the window and left the default name for the view.

2. Creating the attributes in the component controller’s context

Switch to the context tab of the component’s controller. Create a node and use structure BAPICUSTOMER_04. For simplicity I added four attributes from the structure: Customer, Name, City and Street. In the end it should look something like this:

3. Map the component’s context to the view’s context

Now you need to map the component’s context to the view’s context. Switch to the context tab of the component view to be able to do this. Drag the component’s context node to the view’s context node. If done properly, it should look like this:

04.05.2012


4. Creating the layout

Now you have to change to the layout tab and draw it out, mapping the fields to the respective attributes in the view’s context. I used read-only input fields and labels. This is how it looks like in the end:

04.05.2012


5. Creating the method

Now we need to implement the method that will get the information for the customer and display it on the screen. Switch to the method tab of the component controller and create method SHOWCUSTOMER. Don’t forget to check the interface checkbox or it won’t be available for the component usage controller. Method list:

Double click it. Now you have to implement the method. We need an importing parameter, CUSTOMER_ID, of type S_CUSTOMER, like this:

04.05.2012


Here’s the code for the method: METHOD showcustomer .

DATA:

lv_kunnr TYPE kunnr,

ls_cust TYPE bapicustomer_04.

CALL FUNCTION 'CONVERSION_EXIT_ALPHA_INPUT'

EXPORTING

input = customer_id

IMPORTING

output = lv_kunnr.

CALL FUNCTION 'BAPI_CUSTOMER_GETDETAIL2'

EXPORTING

customerno = lv_kunnr

IMPORTING

customeraddress = ls_cust.

DATA lo_nd_cust_data TYPE REF TO if_wd_context_node.

DATA lo_el_cust_data TYPE REF TO if_wd_context_element.

DATA ls_cust_data TYPE wd_this->element_cust_data.

* navigate from <CONTEXT> to <CUST_DATA> via lead selection

lo_nd_cust_data = wd_context->get_child_node( name = wd_this-

>wdctx_cust_data ).

* @TODO handle non existant child

* IF lo_nd_cust_data IS INITIAL.

* ENDIF.

* get element via lead selection

lo_el_cust_data = lo_nd_cust_data->get_element( ).

04.05.2012


* @TODO handle not set lead selection

IF lo_el_cust_data IS INITIAL.

ENDIF.

* @TODO fill static attributes

ls_cust_data = ls_cust.

* set all declared attributes

lo_el_cust_data->set_static_attributes(

static_attributes = ls_cust_data ).

ENDMETHOD.

6. Save it and activate everything!

Save and activate everything, you should now be able to proceed with tutorial 6 – component usage. Hope this was helpful for you.

web dynpro for abap fix for tutorial 6

Documents