Webdynpro abap- navigation to context node

Hello all,
I am a new user for Webdynpro - abap. I was trying to set a default value to a input field. I am using WDDOINIT method for navigation to context node FLIGHTINFO. But i am not getting the exact idea behind the navigation at code level. Also not clear about get element at lead selection for context node FLIGHTINFO.
Please provide inputs in this case.
Thanks,
Yogesh

Hi
There can be many nodes in the context, and many elements in each node. In order to set the default value to one of the attributes, we need to proceed as follows:
1) Get the reference of node, whose attribute needs to be defaulted. Following is the code for the same:
DATA lo_nd_cn_node TYPE REF TO if_wd_context_node.
navigate from <CONTEXT> to <CN_NODE> via lead selection
lo_nd_cn_node = wd_context->get_child_node( name = wd_this->wdctx_cn_node ).
wd_context has the reference of context node (root node). It gives the reference of desired node (its child node) using method get_child_node. We pass the name of desired node as parameter of this method.
2) In similar way we proceed to get the reference of desired element using following code:
DATA lo_el_cn_node TYPE REF TO if_wd_context_element.
get element via lead selection
lo_el_cn_node = lo_nd_cn_node->get_element( ).
3) This element may have many attributes. We set the default value to attribute of selected node using following code:
set single attribute
lo_el_cn_node->set_attribute(
EXPORTING
name = `CA_TEST` " name of attribute where input field is bound
value = lv_ca_test ). "Value that you want to set as default
Follow the links for more help:
http://help.sap.com/erp2005_ehp_04/helpdata/EN/46/14cf058d484250e10000000a1553f6/content.htm
http://help.sap.com/erp2005_ehp_04/helpdata/EN/46/1b994f0c475a67e10000000a1553f7/content.htm.
Regards,
Saket.

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Problem description:
There is parent node (cardinality 0..n), which has some attributes and also a sub node.
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Regards
Sagar

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Kindly,Help me in setting the Default values for the Select-options in Webdynpro ABAP.
Here the Node and the Attributes are Created Dynamically, and then Displayed Select-options Component View.
Regards,
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Xavier Reddy Penta sent me this question via email and I answered it directly yesterday. Here is the solution that I provided to him, so that it is stored with the original question:
I believe your problem is that you are not setting the value into the range correctly. You are setting it directly into the field symbol of the range like such:
<FS> = L_STRING2.
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1.     sign of type c and length 1. The content of sign determines for every row whether the result of the condition formulated in the column is included or excluded in the entire resulting set for all rows. Evaluable values are "I" for include and "E" for exclude.
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3.     low of the data type defined after FOR. This column is designated for the comparison value or the lower interval limitation.
4.     high of the data type defined after FOR. This column is designated for the upper interval limitation.
So when you are moving the value into the field symbol you are setting it into the sign column.
Here is an example of how you can access the components of the range:
* create a range table that consists of this new data element
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                         <struct>      TYPE ANY,
                         <wa>          TYPE ANY,
                         <option>      TYPE char2,
                         <sign>        TYPE char1,
                         <high>        TYPE ANY,
                         <low>         TYPE ANY,
                         <wa_values>   TYPE ANY.
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      APPEND INITIAL LINE TO <tab> ASSIGNING <wa>.
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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,
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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.
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      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( ).
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                                   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)
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Venkat

Hi,
Check the NW release,
I checked with NW 7.02 - 2 tabs were available.
with NW 7 - only 1 tab was available which you mentioned.
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i am trying to read a context in an webdynpro for ABAP where the context is an table. if I try to read a single attribute there is no problem:
get single attribute
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    EXPORTING
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    IMPORTING
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    elem_ex_mat_data                    TYPE REF TO if_wd_context_element,
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navigate from <CHANGING> to <EX_MAT_DATA> via lead selection
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IF ( node_ex_mat_data IS INITIAL ).
ENDIF.
get element via lead selection
elem_ex_mat_data = node_ex_mat_data->get_element( ).
@TODO handle not set lead selection
IF ( elem_ex_mat_data IS INITIAL ).
ENDIF.
alternative access via index
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@TODO handle non existant child
if ( Elem_Ex_Mat_Data is initial ).
endif.
get all declared attributes
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    IMPORTING
      static_attributes = stru_ex_mat_data ).
While debugging I find in node_ex_mat_data (CLASS=CL_WDR_CONTEXT_NODE_VAL) a attribute collection with 55 values (thats the number of values the context table should have) but I have no idea how to get the values for my internal table.
Please help.
regards
stefan

Hi Stefan,
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I have an table in webdynpro and a datagrid in flex, both getting the value from the same context node. My requirement is to make the table fields editable and when I make changes in the datagrid, it should get reflected back in the webdynpro table.
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Hi,
As you are using a datasource, i assume you have set method in flex to read the datasource(context node). What you need to do is store the reference to this datasource in a local flex variable. Have a look at the below code:
private var refreshFlexUINode:ArrayCollection;
public function set refreshFlexUI(datasource:ArrayCollection):void
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it would be like, if you want to save second row of the datagrid
Object obj = refreshFlexUI.getItemAt(1)
obj[<CONTEXT_ATTR_NAME>]=<new value>
Hope this helps!
Best Regards,
Srilatha
Edited by: Srilatha M on Jun 28, 2011 6:34 AM
Edited by: Srilatha M on Jun 28, 2011 6:35 AM

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Hello,
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cl_wd_grid_data=>new_grid_data( element = drop_down_figure ).
ui_container->add_child( drop_down_figure ).
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Hi Georgy,
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/people/thomas.szcs/blog/2005/12/28/dynamic-programming-in-web-dynpro-abap--introduction-and-part-i-understanding-ui-elements
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String (for table name)
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FIELD-SYMBOLS:
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new_tab = cl_wd_dynamic_tool=>create_table_from_node(
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Context system menu (Webdynpro Abap)

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Help me!!! How can I disable/hide the context menu in webdynpro Abap for system user parameter, when I run a web application?
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Thanks

Hi,
please watch this [Thread|https://forums.sdn.sap.com/click.jspa?searchID=9590724&messageID=4706614]
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Edited by: Koen Labie on Mar 10, 2008 4:00 PM
corrected link

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please give the detailed explanation.
by
Parthasarathi

Hey Lingam,
Check out this link...
[Inserting a Table or Loop|http://help.sap.com/erp2005_ehp_04/helpdata/EN/4c/9cc19e5c874091a99790e540b06f3a/frameset.htm]
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I remembered I read a blog and some forum posts that mentioned about this solution, but I just could not locate where they are now through SDN search now.
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Portal Runtime Error
An exception occurred while processing a request for :
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How to deal with the dynamic nodes ...in webdynpro abap

Hi Guys,
How to insert the dynamic nodes in the context controller...
Thanks
Chandra

You can use node_info to create a dynamic node or use CL_WD_DYNAMIC_TOOL to create dynamic nodes under a node
For Eg Struc_Node
fields A type char20,
fields B type char 20
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data lv_node_info type ref to if_wd_context_node_info.
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CALL METHOD lv_node_info->add_new_child_node
EXPORTING
static_element_type = 'Struc_node
name = lv_node_name
is_static = abap_false
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RECEIVING
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or
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(ABAP) Internal table of type context node (Urgent)

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Now I would like to pass this as a exporting parameter to a method in component controller. Kindly suggest how i can achieve this. I tried the following:
it_abc exporting element_abc_node.
But this does not work.
Kindly reply soon.
Regards,
Anoop
Message was edited by: Anoop Singh Saini

Hi Anoop,
Web Dynpro generates an internal table (and structure) for each context node in a controller's context. Such a definition is local to the controller where the node is defined, since a different controller could have a node of the same name with different attributes. Nonetheless, it is possible to transfer the data of a node to another controller by:
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Best regards,
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Thus, I need to know which month's current schedule is chosen by the user. My tree UI is an adaptation from WDT_TREE example from Std SAP example programs. For the chosen month to be known, I have to go up in the context node hierarchy by one level? (something like, get_parent of) from the current leaf. I am not sure how would i do it. Any pointers would be greatly helpful. I tried to pick up ideas from couple of tutorials and bunch of forum posts but I did not get anywhere.
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Could you please elaborate a bit more on your tip. I am a fledgling OO abapper not 'really' knowing as much OO as I should ..!!
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In order to get this Month node text for the selected 'Current Schedule' leaf, User have to click on the Month Node that opens the Current Schedule Leaf. If they clicked on the triangle beside the node, it still opens the Month Node to reveal the Current Schedule leaf, but the Month name wont be captured until User expressly clicked on Month Node first or the Folder Icon associated with it..!!
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As I await your reply i shall try to pick up from your tip.
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Webdynpro abap- navigation to context node

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