Adding dynamic context node

Hello,
I having problems with creating a dynamic context node.
How can i add a new node to the context on runtime and not on design time.
Best Regards,
Smadar.

Hi,
IWDNodeInfo nodeinfo=wdContext.getNodeInfo();
/* This will add a ValueNode */
IWDNodeInfo customerNode=nodeinfo.addChild("Customer",null,true,true,true,false,false,true,null,null,null);
/* This will add a Attribute to the above Node */
IWDAttributeInfo custAttr=customerNode.addAttribute("AttribName","com.sap.dictionary.string");
Regards, Anilkumar

Similar Messages

Error creating dynamic context node in Webdynpro for ABAP. Plesae help!

Hi
   I am getting the following error while creating a dynamic context node with 2 attributes. Please help me resolve this problem.
Note
The following error text was processed in the system PET : Line types of an internal table and a work area not compatible.
The error occurred on the application server FMSAP995_PET_02 and in the work process 0 .
The termination type was: RABAX_STATE
The ABAP call stack was:
Method: IF_WD_CONTEXT_NODE~GET_STATIC_ATTRIBUTES_TABLE of program CL_WDR_CONTEXT_NODE_VAL=======CP
Method: GET_REF_TO_TABLE of program CL_SALV_WD_DATA_TABLE=========CP
Method: EXECUTE of program CL_SALV_WD_SERVICE_MANAGER====CP
Method: APPLY_SERVICES of program CL_SALV_BS_RESULT_DATA_TABLE==CP
Method: REFRESH of program CL_SALV_BS_RESULT_DATA_TABLE==CP
Method: IF_SALV_WD_COMP_TABLE_DATA~MAP_FROM_SOURCE_DATA of program CL_SALV_WD_C_TABLE_V_TABLE====CP
Method: IF_SALV_WD_COMP_TABLE_DATA~MAP_FROM_SOURCE of program CL_SALV_WD_C_TABLE_V_TABLE====CP
Method: IF_SALV_WD_COMP_TABLE_DATA~UPDATE of program CL_SALV_WD_C_TABLE_V_TABLE====CP
Method: IF_SALV_WD_VIEW~MODIFY of program CL_SALV_WD_C_TABLE_V_TABLE====CP
Method: IF_SALV_WD_COMPONENT~VIEW_MODIFY of program CL_SALV_WD_A_COMPONENT========CP
My code is like the following:
TYPES: BEGIN OF t_type,
            CARRID TYPE sflight-carrid,
            CONNID TYPE sflight-connid,
         END OF t_type.
Data: i_struc type table of t_type,
dyn_node   type ref to if_wd_context_node,
rootnode_info   type ref to if_wd_context_node_info,
i_node_att type wdr_context_attr_info_map,
wa_node_att type line of wdr_context_attr_info_map.
      wa_node_att-name = 'CARRID'.
      wa_node_att-TYPE_NAME = 'SFLIGHT-CARRID'.
      insert wa_node_att into table i_node_att.
      wa_node_att-name = 'CONNID'.
      wa_node_att-TYPE_NAME = 'SFLIGHT-CONNID'.
      insert wa_node_att into table i_node_att.
clear i_struc. refresh i_struc.
select carrid connid into corresponding fields of table i_struc from sflight where carrid = 'AA'.
rootnode_info = wd_context->get_node_info( ).
rootnode_info->add_new_child_node( name = 'DYNFLIGHT'
                                   attributes = i_node_att
                                   is_multiple = abap_true ).
dyn_node = wd_context->get_child_node( 'DYNFLIGHT' ).
dyn_node->bind_table( i_struc ).
l_ref_interfacecontroller->set_data( dyn_node ).
I am trying to create a new node. That is
CONTEXT
- DYNFLIGHT
CARRID
CONNID
As you see above I am trying to create 'DYNFLIGHT' along with the 2 attributes which are inside this node. The structure of the node that is, no.of attributes may vary based on some condition. Thats why I am trying to create a node dynamically.
Also I cannot define the structure in the ABAP dictionary because it changes based on condition

Ok, I think I found a bug... It seems for adobe forms in WD4A, the root context node must be 1-1 and you must nest the 1-n node within that... Not sure why, but it worked. So in my case my context would look like this:
FOO_NODE (1-1)
     Widget (1-N)
          -Widget_info (1-1)
               *Name
               *Sku
               *Description
          -Widget_plant (1-M)
               *Plant_Code
               *Plant_State
               *Plant_City
          -Widget_pic (1-1)
               *Picture

To access a dynamic context node defined in a Used Component

Hi Gurus,
I need your help with something.
I have a dynamic context node in ComponentA. I want it in Component B too.
Component B uses Component A, but I am not able to get access to the context node.
Is it possible to do this? Any suggestions how to proceed.
PS: I am trying to do a dynamic mapping. The initial scenario was here, Set data into Model Node on Navigating from a View
Thanks in advance,
Anjana R.
Message was edited by:
Anjana Raghav

Hi Gurus,
Its working now. Earlier, the code was something like this....
IWDNodeInfo compNode = wdThis.wdGet<i>Comp</i>Interface().wdGetAPI().getContext().getRootNodeInfo().getChild(nodeNm);
viewNodeInfo.setMapping(compNode,true);
and was trying to map it using
iewNodeInfo.addMappedAttribute("order",".<i>Comp</i>."+ nodeNm + ".order");
Now, I am mapping like this.
viewNodeInfo.addMappedAttribute("order","order");
Thanks,
Anjana R.

Create dynamic context node

Hi Experts,
I have tried the given example for Dynamic Context Node in Webdynpro ABAP
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/4c70444a-0801-0010-7688-9e4bd844b783
But getting the Error when executing this application
Note
The following error text was processed in the system ISP : Adapter error in &VIEW_ELEMENT_TYPE& "TABLENAME" of view "ZWD_SACHIN_DYN_ALV.MAIN_VIEW": Context binding of property VALUE cannot be resolved: Node MAIN_VIEW.1.INPUT does not contain any elements
The error occurred on the application server usirs254_ISP_01 and in the work process 0 .
The termination type was: RABAX_STATE
The ABAP call stack was:
Method: RAISE_FOR of program CX_WDR_ADAPTER_EXCEPTION======CP
Method: RAISE_BINDING_EXCEPTION of program CL_WDR_VIEW_ELEMENT_ADAPTER===CP
Method: GET_BOUND_ELEMENT of program CL_WDR_VIEW_ELEMENT_ADAPTER===CP
Please resolve this issue because when I am mapping the Attribute TableName in the InputGroup, it is throwing above Error.
Thanks in advance
Regards
Sachin

Hi Sachin,
I am unable to understand why you are getting an error. I have tried the same tutorial myself and it works fine for me. Make sure that the TABLENAME attribute (which is of string type) is properly binded to the value property of the input field.
Regards
Arjun
Edited by: Arjun Thakur on Mar 17, 2009 1:46 PM

Using Search Help with ALV and Dynamic context node

The topic subject already describes my situation.
I have to create, populate and remove context nodes at runtime, and bind them to an ALV, to let user display the data or modify the data. The nodes I create are always typed with a table name, but the table name is of course, dynamic.
This is all working: what's not working is help for entries inside the ALV; since the table has foreign keys and domains with check tables or fixed values, I expected that search helps were detected and managed by the framework.
Instead, no help search is displayed except the input help based on data-type of the one "Date" input fields.
I think I have to work on the dynamic node creation, and not on the ALV itself, since the latter only takes the node/attributes information, but i could be wrong. I tried with both the two following codings:
CALL METHOD lo_nd_info_root->add_new_child_node
    EXPORTING
      static_element_type          = vs_tabname
      name                         = 'SAMPLE_NODE_NAME'
*    is_mandatory                 = abap_false
*    is_mandatory_selection       = abap_false
     is_multiple                  = abap_true
     is_multiple_selection        = abap_false
*    is_singleton                 = abap_false
      is_initialize_lead_selection = abap_false
      is_static                    = abap_false
    RECEIVING
      child_node_info              = lo_nd_info_data .
cl_wd_dynamic_tool=>create_nodeinfo_from_struct(
      parent_info = lo_nd_info_root
      node_name = 'SAMPLE_NODE_NAME'
      structure_name = vs_tabname
      is_multiple = abap_true ).
The result is the same...is there any way to let the ALV know what search helps it has to use, and doesn't force me to manually build a VALUE_SET to be bound on the single attributes? There are many tables, with many fields, and maintaining this solution would be very costly.

I have checked with method GET_ATTRIBUTE_VALUEHELP_TYPE of interface IF_WD_CONTEXT_NODE_INFO, on an attribute which i know to have a search help (Foreign key of a check table).
The method returns 'N', that is the constant IF_WD_VALUE_HELP_HANDLER~CO_VH_TYPE_NO_HELP. So, the framework was not able to find a suitable search help.
Using method GET_ATTRIBUTE_VALUE_HELP of the same interface, on the same attribute, returns me '111', which is constant C_VALUE_HELP_MODE-AUTOMATIC.
Therefore, the WD framework knows it has to automatically detect a value help, but fails to find one.
Also, this means in my opinion that the ALV and the dynamic external mapping are not the culprits: since node creation, no help is detected for any attribute but the date. Honestly, I don't have a clue on what's happening.

ABAP: dynamic context node + attribute for DROP_DOWN_BY_KEY

Hello,
I need to create a Node with attributes dynamically and than assign it to a DROP_DOW_BY_KEY element in ABAP.
I create drop down this way:
drop_down_figure = cl_wd_dropdown_by_key=>new_dropdown_by_key( bind_selected_key = 'REPOSITORY.FIGURES' on_select = 'GET_OPERATOR' ).
cl_wd_grid_data=>new_grid_data( element = drop_down_figure ).
ui_container->add_child( drop_down_figure ).
However, here I bind to REPOSITORY.FIGURES. Instead of doing this I need to bind it to an attribute that I create.
I can access wd_context but I am not sure how to create a node in wd_context, then attribute for that node that will contain items for drop down.
bind_selected_key is type of String. If I create a node with attribute how do I cast it to a String so I can pass it to a constructor of a drop down?
Thank you.

Hi Georgy,
There is a 3 - series weblog for this.
The first one is:
/people/thomas.szcs/blog/2005/12/28/dynamic-programming-in-web-dynpro-abap--introduction-and-part-i-understanding-ui-elements
The following are the the general steps for creating a node and table where table name is input by the user:
DATA:
UI Elements
    group_1       TYPE REF TO cl_wd_uielement_container,
    new_tab       TYPE REF TO cl_wd_table,
Context Nodes
    dyn_node      TYPE REF TO if_wd_context_node,
    tabname_node TYPE REF TO if_wd_context_node,
Node Info
    rootnode_info TYPE REF TO if_wd_context_node_info,
Data Reference (for internal table)
    stru_tab      TYPE REF TO data,
String (for table name)
    tablename     TYPE string.
FIELD-SYMBOLS:
    <tab> TYPE table.
1) * get node info of context root node
rootnode_info = wd_context->get_node_info( ).
2) * create sub node named TEST1 of structure (tablename)
cl_wd_dynamic_tool=>create_nodeinfo_from_struct(
    parent_info = rootnode_info
    node_name = tablename
    structure_name = tablename
    is_multiple = abap_true ).
3) * get instance of new node
dyn_node = wd_context->get_child_node( name = tablename ).
4) ***** create new UI element table *******************************************************
new_tab = cl_wd_dynamic_tool=>create_table_from_node(
ui_parent = group_1
table_id = 'TESTTAB'
node      = dyn_node ).
5) ***** fill context node with data *******************************************************
create internal table of (tabletype)
CREATE DATA stru_tab TYPE TABLE OF (tablename).
ASSIGN stru_tab->* TO <tab>.
Get table content
SELECT * FROM (tablename) INTO CORRESPONDING FIELDS OF TABLE <tab>.
Bind internal table to context node.
dyn_node->bind_table( <tab> ).
Regards,
Srini.

Dynamic Context Node Copying question

I am trying to dynamically copy some context nodes from my component controller to the view controller. In the source context, I have a node whose "Multiple" property is set to true.
I use the function addMappedChild to copy the attribute info, but the copied node always has "Multiple" set to false!! In the definition of addMappedChild there is no paramter for "Multiple". How do I do this?
Thanks
Walter
public IWDNodeInfo addMappedChild(java.lang.String name,
                                  java.lang.Class elementClass,
                                  boolean singleton,
                                  boolean mandatorySelection,
                                  boolean multipleSelection,
                                  java.lang.String mappedPath,
                                  boolean selectionMapped,
                                  boolean initializeLeadSelection)

Are you making like dscribed here
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/webas/webdynpro/dynamically creating, building, and mapping a context in web dynpro.pdf
page 14?
Best Regards, Maxim r.

How to implement Dynamic Context Node Mapping between Components

Hey genuis:
I am looking for how to implement context mapping bwteen two components. I read some threads, and try to use external context mapping. The example works fine. However, my requirement is more than that.
I have a context node in Component B, and the attributes in it are dynamically generated. Component A is the main component which use Component B's function. Both A and B work fine by theirselves.
When I assemble A and B (external mapping), the system gives me a exception:com.sap.tc.webdynpro.progmodel.context.ContextException: MappedNodeInfo(T8UploadCompInterface.data): cannot create nodes, no mapping defined yet.
Please give me some suggestion?
Any responses are appreciated.

I miss this thread.
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/6fdae690-0201-0010-a580-d104b459cb44
This is almost the right solution for my problem.

Delete Dynamic context nodes?

I have created Context nodes dynamically,, I want to delete few nodes dynamically itself.
wdContext.getContext().reset(true) would delete entire dynamically created nodes..... but i want to delete particular nodes...
can any 1 help me regarding this....
thanku

Try
wdContext.removeElementAt(index)
or
wdContext.removeElement(IWDNodeElement)
Regards, Aldo.

Dynamic context nodes

Hi all,
I want to create a dynamic context in this way. But in this example I always need a data element in the dictionary for the describe by name method --> here ZREMARK
I can use here describe_by_name( 'STRING' ) but then the column headerline is empty.
How can I set the column headerline when I use this coding?
comp-name = 'REMARK'.
comp-type ?= cl_abap_datadescr=>describe_by_name( 'ZREMARK' ).
APPEND comp TO comp_tab.
not this structure contains the fields "CONNID" and "CARRID"
struct_type = cl_abap_structdescr=>create( comp_tab ).
now the nodeinfo is created
node_info = wd_context->get_node_info( ).
node_info = node_info->add_new_child_node(
    name                         = 'MY_NODE'
    is_mandatory                 = abap_false
    is_multiple                  = abap_true
    static_element_rtti          = struct_type
    is_static                    = abap_false
regards

>Is it possible to create the columns of the table control in a similar way?
Yes you can create the table and its columns dynamically in WDDOMODIFYVIEW. Here is a sample - I'm only creating one column, but it would be easy to adapt this logic to loop through some list of fields to create the columns.
DATA lr_container TYPE REF TO cl_wd_uielement_container.
DATA lr_input TYPE REF TO cl_wd_input_field.
DATA lr_table TYPE REF TO cl_wd_table.
DATA lr_caption TYPE REF TO cl_wd_caption.
DATA lr_table_column TYPE REF TO cl_wd_table_column.
DATA lr_table_standard_cell TYPE REF TO cl_wd_table_standard_cell.
IF first_time = abap_true.
    lr_container ?= view->get_element( 'ROOTUIELEMENTCONTAINER' ).
    cl_wd_table=>new_table(
      EXPORTING
        bind_data_source              = 'SFLIGHT.SFLIGHT'
        id                            = 'DYNTABLE'
      RECEIVING
         control                       = lr_table ).
    cl_wd_input_field=>new_input_field(
      EXPORTING
         bind_value             = 'SFLIGHT.SFLIGHT.CARRID'
         id                     = 'INPUT1'
      RECEIVING
        control                = lr_input ).
    lr_table_column = cl_wd_table_column=>new_table_column( ).
    lr_table_column->set_table_cell_editor( lr_input ).
    lr_caption = cl_wd_caption=>new_caption( ).
    lr_caption->set_text( 'Some text' ).
    lr_table_column->set_header( EXPORTING the_header = lr_caption ).
    lr_table->add_column( EXPORTING the_column = lr_table_column ).
*       create the layout data of the text view
    DATA lr_grid_data TYPE REF TO cl_wd_grid_data.
    lr_grid_data = cl_wd_grid_data=>new_grid_data( lr_table ).
    lr_table->set_layout_data( lr_grid_data ).
    lr_container->add_child(
      EXPORTING
        the_child = lr_table ).
ENDIF.

Dynamic Context node

Hi,
    I am new to Webdynpro abap.
   while creating Dynamic node with passing input value am getting error ' Adapter error in &VIEW_ELEMENT_TYPE& "INPUT1" of view "ZKI_WEB_DEMO21.MAIN": Context binding of property VALUE cannot be resolved: Node MAIN.1.INPUT1 does not contain any elements "
Here i'm passing plant as an input field . i create a node with attribute plant 'type = zplant' and method in component controller.
mapping context and calling method in main view.
without passing input am getting the output.
Regards
Kishore

Hi Kissnas,
                      once User Giving the table name and click the button it displaying the output.
but my requirement is user want to give table name and Input value then clicking the button. i binded the value
property to inputfield. when im test the WD Appl it showin error.(before the selection screen it showing error)
Regards
Kishore

How to access the structure of a dynamically created context node/element

Hi All,
in method wddoinit I have added a context node and some attributes
lo_node = wd_context->get_child_node( name = wd_this->wdctx_instructors ).
lo_node_info = lo_node->get_node_info( ).
lo_node_info = lo_node_info->add_new_child_node( name                  = 'OCCUPANCY'
                                                   is_mandatory          = abap_true
                                                   is_multiple           = abap_false
                                                   is_multiple_selection = abap_false ).
      lo_node_info->add_attribute( ls_attr ).
So far, I have node INSTRUCTORS (0...n) with a subnode OCCUPANCY (1...1)
In the supply_method of INSTRUCTORS I would like to fill the instructors node and the OCCUPANCY subnode.
The thing is I do not know the structure of the dynamicaly created subnode OCCUPANCY there. How can I get a description of this node (that, what in non-dynamic programming would be wd_this->element_occupancy...)??
THANKS,
Johannes

...I got this one solved by myself...
I simply added this coding:
lo_node_info = lo_node->get_node_info( ).
lt_attributes = lo_node_info->get_attribute_names( ).
This appers to be enough information to be good to gogo
Thanks anyway.

Error while generating the context node

Hi ,
Requirement is to add the marketing attribute field under the Account details overview Page. As the field was not available in the context node i have added a new context node in the Account details. I used the wizard and added the context node BuilmktattributeRel so as i can add "Attribute set" under the BP overview page."
Now after adding the context node and while executing i am unable to see the overview view page, i am getting an error :
1. Component GET_ATTRIBUTE does not exist
2. Determination of BOL attributes failed
Also i am unable to regenrate the GET_I_method. If i want to delete the Zcontextnode, i am unable to do so.
Kindly help me with the technical approach to add the context node in the overview page.
Thanks in advance,
Sunil

One thread would have been sufficient.
Error while generating the context node

Dynamic Context Mapping in Web Dynpro ABAP

Hi Experts,
How can I create two dynamic Context nodes, one in ViewController and the other in Component Controller and finally create a context mapping between them?
Regards,
Johan Kriek.

Hi Johan,
I found a method IF_WD_CONTEXT_NODE_INFO~ADD_NEW_MAPPED_CHILD_NODE that seems to be the one that I am looking for.
I do have same idea but i have been trying to give solution by using above method,unfortunately here my server is down.check the below code. i didnt check this code due to server down.
DATA: lo_nd_purchase_header TYPE REF TO if_wd_context_node,
      lo_el_purchase_header TYPE REF TO if_wd_context_element,
ls_purchase_header TYPE wd_this->element_purchase_header,
      lo_node_info type ref to if_wd_context_node_info,
      lo_child_node_info type ref to if_wd_context_node_info,
      MAPPING_INFO type WDR_CONTEXT_MAPPING_INFO.
* navigate from <CONTEXT> to <PURCHASE_HEADER> via lead selection
lo_nd_purchase_header = wd_context->get_child_node( name = wd_this->wdctx_purchase_header ).
              CALL METHOD LO_ND_PURCHSE_HEADER->GET_NODE_INFO
                RECEIVING
                  NODE_INFO = lo_node_info.
       MAPPING_INFO-controller = 'ZWDC_ALV'. "conponent name
       MAPPING_INFO-path = 'PURCHASE_HEADER'. "Controller context node name
      CALL METHOD LO_NODE_INFO->ADD_NEW_MAPPED_CHILD_NODE
        EXPORTING
          CHILD_NAME      = 'PURCHASE_HEADER'
          MAPPING_INFO    = MAPPING_INFO
*          IS_STATIC       = ABAP_TRUE
        RECEIVING
          CHILD_NODE_INFO = lo_child_node_info

Element addition to context node at runtime.

Hi all,
I have a class array object in which all data comes at runtime.
I created a node in context.
i have to add the element to node. i ahve used that node as a datasource to table UI.
EmpWrapper e[] = null;
e = tmp1.Get(wdContext.currentContextElement().getDIVISION());
// i am getting all data in e[]
        if (e.length != 0)
        for (int i=0;i<= e.length;i++){
//how to add the e data to node EMP in context

Hi Shefali,
Here is the link to create dynamic context nodes and its attributes.
https://www.sdn.sap.com/irj/sdn/downloaditem?rid=/library/uuid/b3f6e990-0201-0010-c087-c865f2c738b3
Regards,
Abhimanyu L

Adding dynamic context node

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