Creating Node for Context in a component controller disabled.

Hi, I am trying to create this node, i see the option when I do RightClick the context in the component controller > Create>Node, but i was not able to select it. Am i missing some settings to enable it?
Appreciate your help.
Thanks,
Chinnam.

hi..
No worries, this forum will help you
On top left corner you will find , small icons for change, dispaly..
just place your mouse over those icons...you wil get the tooltips.
to build a simple applicatioin
http://www.****************/Tutorials/WebDynproABAP/SimpleApplication/SimpleApp1.htm
and to learn webdynpro just go through the below links
http://www.sdn.sap.com/irj/scn/webdynpro-elearning
Regards
Srinivas

Similar Messages

Cannot access Created Context Attribute from Component Controller

Hello All,
I have added a new attribute to a node in my component controller 'LOGONUID' and I cannot access it within my windows within the WDA application.
DATA lo_nd_url_param TYPE REF TO if_wd_context_node.
DATA ls_workset TYPE wd_this->element_workset.
"DATA ls_logonuid TYPE wd_this->element_logonuid.
I get an error as soon as I try to activate this code in my method in my W_MAIN
In my component controller I do not see it reference in the SAP generated code in my WD_THIS IF_COMPONENTCONTROLLER?
* Intf.: ig_componentcontroller
* Purp.: programming interface for access of this controller within
*        other controllers of the same component
*        controller: <COMPONENTCONTROLLER> of
*        component:   <zhr_wd_mss>
* UDate: 20111207 145441
*=====================================================================*
interface ig_componentcontroller.
interfaces: ziwci_hr_wd_mss .
constants:
    wdctx_context type string value `CONTEXT`.
constants:
    wdctx_cuifcontext type string value `CUIFCONTEXT`.
types:
    begin of Element_cuifcontext,
      USERID type String,
      LASTEVENTOPERATION type String,
    end of Element_cuifcontext,
    Elements_cuifcontext type
       standard table of Element_cuifcontext
       with default key.
constants:
    wdctx_messages type string value `MESSAGES`.
types:
    Element_messages type ZHR_S_MESSAGE,
    Elements_messages type
       standard table of Element_messages
       with default key.
constants:
    wdctx_workset type string value `WORKSET`.
I want it to be declared as the constant 'WORKSET'
thank you
Edited by: Keith Warnock on Dec 7, 2011 8:55 PM
Edited by: Keith Warnock on Dec 7, 2011 8:56 PM

> I have added a new attribute to a node in my component controller 'LOGONUID' and I cannot access it within my windows within the WDA application.
>
>
>
> DATA lo_nd_url_param TYPE REF TO if_wd_context_node.
>   DATA ls_workset TYPE wd_this->element_workset.
>   "DATA ls_logonuid TYPE wd_this->element_logonuid.
>
>
>
This declaration is not right. There is no element logonuid, you have the attribute inside a node. workset is a node and thats why you can declare that way.
easiest way is to declate
data lv_logonuid type <ddic type> or
data lv_logonuid type wd_this-><node name>-logonuid.
You can also use the code generator in (CTRL +F7 ) to get/set attributes.

Access context of Component Controller from Views

Hi,
In WD Java, I used to set attributes value for Context present in Component controller from the view. I used to write a piece of code at the view level for this.
How do i do this in WD ABAP. I believ I have to get instance of Component controller like this:
lr_compcontroller type REF TO ig_componentcontroller.
lr_compcontroller = wd_this->get_componentcontroller_ctr( ).
Regards,
Murali.

Hi Murali,
yes you can access the comp_controller in the same sort of way in WDA.
You declared component usages on the property tab.
The wizard (ctrl-F7)has various options, check it out.
One is calling methods on declared controller usages.
the result is for example such generated code:
DATA: l_ref_ANOTHER_CONTROLLER TYPE REF TO IG_ANOTHER_CONTROLLER .
l_ref_ANOTHER_CONTROLLER = wd_This->Get_Another_Controller_Ctr( ).
data:
l_Api_Another_Controller type ref to IF_WD_CONTROLLER.
See also local interface code in CTRL-SHIFT F1.
You work directly with this info. Indeed constants from the interfaces should be used this way.
Work with the wizard. And declare all usages in the properties tab.
Moving outside of the framework is possible but not recommended
regards
Phil

Mapping one node in a view context to many nodes in the component controlle

Hi guys,
I need to map an element (attribute) of a node in the View Context to an attribute of multi nodes of the same type:
Context View:
customer_no
      |
      | -> KUNNR
Component Controller Context having two nodes:
- Node1
     RFC1
        |
        |->KUNNR
- Node2
      RFC2
         |
         |->KUNNR
Above I need to map the (KUNNR) in customer_no node to KUNNR in the RFC1 RFC2 before i execute the two RFCs services.
Note:
if this is not possible would you mention another solution.
Thanks,

Hi,
   As per MVC you cannot map context from view controller to component controller.Mapping can happen from component
controller to view controller.
You cannot create mapping for context attributes. You can map nodes if both source node and destination node both has same structure and same number of attributes. If they dont contain same number of attributes the extra attributes from the source node gets copied to the destination node.
In your case before the RFC execution you can read the value of attribute Kunnr from view and set it the RFC attribute Kunnr before the Function module execution.
Regards
Bala Baskaran.S

Read a View Context's node's element and assign from Component controller

Hello Experts,
I'm new to JAVA WD.
Here is my scenario.
I have to use an Adobe form in a WDJ. The input parameters and the output parameters of the DC are defined in a method in the Interface Controller method.
The context of the Component Controller has the following structure
Context
---StartDate
---EndDate
---AbsenceType
Then the mapping between the Component controller and the interface controller is done so that the Interface controller also has the context structure as
Context
---StartDate
---EndDate
---AbsenceType
So now the interface controller and the component controller are bounded correctly.
Now I bind the view also with the Component controller as below.
Context
---StartDate
---EndDate
---AbsenceType
But since i need to use an Adobe interactive form inside this view, the datasource for the form cannot be the root context node but some other node. So I replicated the same structure in the view context so as to make the fields visible in the Adobe form context. Now the context looks as below.
Context
---StartDate
---EndDate
---AbsenceType
---DATA_NODE
-----StartDate
-----EndDate
-----AbsenceType
Now my question is, how do i map the result from the Adobe form into the context of the view??
What code should i write and where should i write to achieve this?
I need to do the following. But dont know how to write the code for this.
Context.StartDate = Context.DATA_NODE.StartDate
Context.EndDate = Context.DATA_NODE.StartDate
Context.AbsenceType= Context.DATA_NODE.AbsenceType
Please help!
Any help will be greatly appreciated.
Thanks,
Sam

Hello Nikhil,
I'm stuck with another small issue.
Let me first explain what I'm trying to do.
I have a view with the context structure as follows
Context
---DATA_NODE (Node)
----Data1
----Data2
---Data1
---Data2
All i need to do is, at the start of the view, i need to move the data from
Context.Data1=>Context.DATA_NODE.Data1 and
Context.Data2=>Context.DATA_NODE.Data2
Also, at the View Submit button click, I need to move the data from
Context.DATA_NODE.Data1 => Context.Data1 and
Context.DATA_NODE.Data2 => Context.Data2
(I managed to do this submit button click by calling an action->method and wrote the code as you gave earlier)
wdContext.currentContextElement().setData1(wdContext.currentData_NodeElement().getData1());
wdContext.currentContextElement().setData2(wdContext.currentData_NodeElement().getData2());
But I wrote at wdInit() for the view the code in the reverse way, but the values are not getting passed to the Data_Node and hence its not defaulting with the values from the elements of the context.
This is what I wrote.
wdContext.currentData_NodeElement().setData1(wdContext.currentContextElement().getData1());
wdContext.currentData_NodeElement().setData2(wdContext.currentContextElement().getData2());
Please let me know if I'm doing something wrong here.
Appreciate your help in advance!
Cheers,
Sam

Map context node web dynpro to context DATA of interface controller ALV

Hi Experts,
I have started creating simple ALV by following the example in the below mentioned link.
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/3439404a-0801-0010-dda5-8c14514d690d
I have completed 95% development but stuck with last bit of
Set data to ALV for display (via reverse context mapping).
When Click on the Controller Usage button. The component controller of your Web Dynpro component DOES NOT appears on the right side of the screen.
Therefore I can not Map context node NODE_FLIGHTTAB of your Web Dynpro component to context DATA of the interface controller of the ALV component.
Could you please shed me light on this.
Your time and help much appreciated.
Best Regards
CB

Hi Chandra,
You need to add component controller first. Just go to the property tab of interface controller of the alv component and click on create button and then add the component controller. After that you'll be able to see the node in the context tab.
Regards
Arjun

ALV and component Controller Context.

Good morning experts,
i use an alv to display a context from the component controller. The ALV is editable.
My problem now is that changes to the ALV never reach the node.
Where are my changes and what must i do to write them to the node.
Thank you and best regards
René

Hi Rene,
You need to create an event handler method (say for example CHECK_DATA_CHANGE) for the event ON_DATA_CHECK of the ALV.
You would have to first call the DATA_CHECK method of the ALV component. This method checks if any data has changed in the ALV and then triggers the ON_DATA_CHECK event if it finds that something has changed in the ALV. Create an eventhandler method for the ON_DATA_CHECK method and within this method write the code for modifying the context attributes to reflect the new ALV data.
Call this DATA_CHECK method from WDDOAFTERACTION so that whenever any action is performed the system would check if any data has changed in the ALV & then eventually execute your eventhandler method resulting in the context node getting updated. Hope that this is clear for you now.
method WDDOAFTERACTION .
DATA lo_interfacecontroller TYPE REF TO iwci_salv_wd_table .
lo_interfacecontroller = wd_this->wd_cpifc_alv( ).
lo_interfacecontroller->data_check( ).
endmethod.
Regards,
Uday

How to create a byte[] as parameter for a Method inside the Controller

Hi Experts,
I want to create a method getCachedWebResource inside the component controller which has a parameter file which is of type byte[].
But in Netweaver Developer Studio I am not able to create this parameter with type byte[] .
When I try creating a parameter of this type (byte[]) . I get only byte from drop down and below Array type checkbox is disabled.
Please help me in this regards.
I am already highly obliged to his forum with lots of useful answers. Hoping the same this time too
Best Regards,
Roby..

Robert-
There are two ways of achieving this:
1. Create a private getCachedWebResource() method inside your component controller's others section. i.e. do not create a method on the Methods tab, but instead code the method directly into the controller.
2. Create a parameter of type java.lang.Byte[ ] instead of byte[ ]. This can be done by clicking on the Browse button next to the Type and then choosing the Java Native Type radio button. In the Java Native Type input field provide java.lang.Byte. Click on Ok and you should see the Array Type option getting enabled. Check it, and in the method you should convert from java.lang.Byte to byte.
I would stick to option (1)
Cheers-
Atul

Mapping between view controller and component controller

Hi Experts,
I am new to web dynpro ABAP. First I created an application using one input field and one button, my view name is V1. In view context, I created one node viz. NODE1 using table SFLIGHT, fields chosen are CARRID CONNID and FLDATE. I have bind that to my input field and for button I have not done any thing. So, when I am running this application it is allowing me to select value for my input field. After this, I have added a table to the view layout. I have added to nodes using sflight table in COMPONENT CONTROLLER. First node is SFLIGHT with CARRID, CONNID, FLDATE, PRICE and PLANETYPE and second node is NODE1(same name) with only CARRID. Now in VIEW CONTEXT it is showing -
CONTEXT
   NODE1
     CARRID
     CONNID
     FLDATE
(which I had created in VIEW CONTEXT for input field)
CONTEXT COMPONENT CONTROLLER
   SFLIGHT
     CARRID
     CONNID
     FLDATE
     PRICE
     PLANETYPE
   NODE1
     CARRID
(which I had created in component controller after adding table)
Now both this context should be matched as per my knowledge, so that when I bind the table it should V1.SFLIGHT.<fieldname> and not as V1.NODE1.<fieldname>
But I don't know how to match them. Please help.

Hi Sambaran,
I guess I understood what you want.
To achieve this, proceed as follows:
1)Open your View, goto Properties tab. Here in the Used controller table, click on the create icon to include the component controller (component controller is added by default by the framework, if you use custom controller you need to define this usage).
2)Once you do this, goto Context tab of the view, here now you will be able to see the component controller on the right hand side.
3)Next, drag the SFLIGHT node from the component controller, and drop it on the Context (root context) of the view (left side). Doing this system will create a mapped context node on the view which you will use to bind to the view elements on the layout.
The above steps apply if you want to directly create a view context from component controller context.
Hope this helps!
Thanks,
Chitrali

Binding 2 Models in the Same component controller

I'm using 2 Import Adaptive RFC Models. I want to bind both the models in the component controller of the same web dynpro component.
But when I try to do model binding for the second model, it does not allow me to do so. If I try to bind the same model in a different project, it happens perfectly and works fine. That means the model i.e. the BAPI is perfectly ok.
Can anyone please tell why is it not allowing to bind 2 models in the component controller of the same web dynpro component?

Hi Satyadev,
   If I undersatand your description properly, you have 2 models nodes in a webdynpro component, and you want to bind these two together. If this is the question, then, yes you cant do the bindings declaralatively, you have to do it dynamically...
Look at the code snippet below, it may help you...
Suppose ChildNode1 and ChildNode2 are the model node in the context of the component controller. Then you can map these two nodes dynamically....
wdContext.wdGetAPI().reset();
     IWDNodeInfo testNodeInfo1 = wdThis.wdGetAPI().getContext().getRootNode().getChildNode("ChildNode1", IWDNode.LEAD_SELECTION).getNodeInfo();
     IWDNodeInfo testNodeInfo2 = wdThis.wdGetAPI().getContext().getRootNode().getChildNode("ChildNode2", IWDNode.LEAD_SELECTION).getNodeInfo();
     testNodeInfo2.setMapping(testNodeInfo1, true);
     testNodeInfo2.addAttributesFromDataNode();
Hope this helps,
Please let me know if I have not understood your question properly...
Regards,
Vishnu Prasad Hegde

CE: Mapping from Component-Controller to Component-Interface

Hi experts,
how can I map the context of a component controller to the component interface? There is a predefined data link between them but I do not find any possibility to edit this link.
Thank you for each hint,
Christoph

Hi,
Copy the context node from the component controller and paste it to the interface controller.
Regards
Ayyapparaj

What is CUSTOM CONTROLLER & COMPONENT CONTROLLER

hI ALL
1)what is CUSTOM CONTROLLER & COMPONENT CONTROLLER
GIVE DIFFRENCES AND ADVANTAGES OF EACH
REGARDS
BABU

Hi,
Custom Controllers -
A controller that can be defined by application development and used to share common data over several views. Custom controllers are defined for purposes that cannot be assigned to view controllers or component controllers, and serve as structuring element of a Web Dynpro application. Custom controllers use their context to communicate with their surroundings. They are used for manipulating data, or connecting to the back end.
Leaving content frame
Component Controllers-
Each Web Dynpro component contains exactly one component controller. This controller is automatically created during the component creation and contains a context, events, and methods. Unlike a view controller, the component controller is visible for all views in a component. This means, the controllers of different component views can access context elements or methods of the component controller. For this purpose, the component controller usage is automatically created for every view controller.
See this link for more details -
http://help.sap.com/saphelp_erp2005/helpdata/en/eb/e1cb5eea012b4481f8077c6023a70e/frameset.htm
The definitions explain the difference between these 2 types of controllers.
Hope this helps.
ashish

Is it possible to serialize a web dynpro component controller?

Hi,
Is it possible to serialize a web dynpro component controller and deserialize it for use?
I have one web dynpro application WDA1 for web dynpro component WDC1. And another web dynpro application WDA2 for WDC2 will be opened in a new window triggered by a button action in WDC1.
Iu2019d like to pass the object reference of WDC1 component controller to WDC2.
I first tried to use a static member of a class object but found out that even the static member is initialized and set in WDC1, itu2019s still initial when I access it in WDC2.
Then I searched the forum and found one article Passing Object ref to Webdynpro Application while calling from BSP screen .
The recommended way is to serialize the object reference and store in a DB table, later on read it out and deserialize it for use.
I tried serialization using the following code, but when itu2019s deserialized, the result is initial.
Can anyone share some ideas on this?
Serialize
data: ostream type string,
           xslt_err type ref to cx_xslt_exception.
***** serialize model class
try.
      call transformation id
      source model = wd_comp_controller
      result xml ostream.
    catch cx_xslt_exception into xslt_err.
endtry.
Deserialize
    data: istream type string,
          xslt_err type ref to cx_xslt_exception.
    istream = ls_db_sel-obj.
    data lr_wdc type REF TO ZIWCI_BY_WDC_SERIALIZE.
    try.
        call transformation id
        source xml istream
        result model = lr_wdc.
      catch cx_xslt_exception into xslt_err.
    endtry.

When you say new window, I assume you mean new browser window. This is a separate user session then. This is why the singleton pattern doesn't work. Have you considered using a new dialog window instead of a new browser window. It will be modal, but will share the same user session as the parent window.
>Why do you choose this approach over cross-component usage ? component usage is the way webdynpro components are >to be reused.
>You can also consider using Singleton OO pattern class to share data between these two components.
Neither of these approaches will work if you are using separate browser windows. Such an approach results in two separate user sessions (perhaps even running on different application servers depending upon how you have load balancing setup) and therefore can't share data using either of these approaches.
In general the idea of serialization and then writing the string ito a server cookie or other database table is sound. I don't think you should try and serialize the component controller, however. Serialization only saves and restores public attributes - not protected or private ones. So in general a class has to be designed for serialization. The component controller is much too complex and wasn't designed for such an operation.
I would suggest instead extracting the data you want to share out of component controller or context and serializing it into a custom class and passing that to the other component.

How to create a context node for "IBHeader" at the view "BuPaIBaseDetail"?

hi, experts
for the requirement, i have to get data from a root BO-IBHeader in the view of "BuPaIBaseDetail".But the view already has IBHeader's child object-"IBComponent", whose controller class is "CL_CRM_IC_BUPACONTROLLER_CN08", how can i create the context node for "IBHeader"?
angerly wait for the answer. thanks a lot

If you right click on an empty container or a container with an object in it, it has the same available choices to select. However, if you create a blank property node on the block diagram, and wire up the .net object to it, you will see a much different list of properties.
So, the property node created from right clicking a .NET container will be for that container, even if there is an object inside. To create a property node for the object, you must wire the .NET object to an empty property node on the block diagram.
Chris Van Horn
Applications Engineer

How to populate context node of component controller

Dear People,
Is there any way i could access my custom context node of component controller in the context node class of my custom controller.
I am navigating from one component to another, Upon initial launch everything is working fine, however if i go to home page and come back. the assignment block is coming empty.
In WD_USAGE_INITIALIZE i m binding my custom controllers context node with the component controller's context node of the other component and it works fine when i load the UI. however if i go to home page and come back. the assignment block is coming empty.
Following code is in method of DO_VIEW_INIT_ON_ACTIVATION of the other componenet.
METHOD do_view_init_on_activation.
DATA:   lv_btstatus_parent TYPE REF TO cl_crm_bol_entity,
        lv_comp_ctrl      TYPE REF TO cl_btstatus_bspwdcomponen_impl.
CONSTANTS:
        lc_us_header      TYPE crmt_relation_name VALUE 'BTStatusHUserAll',
        lc_us_item        TYPE crmt_relation_name VALUE 'BTStatusIUserAll'.
lv_comp_ctrl ?= me->comp_controller.
check if relationname has been passed from outside
    gc_relation_name = lv_comp_ctrl->get_relation_name( ).
IF gc_relation_name IS INITIAL.
check type of parent to determine relationname
    *lv_btstatus_parent ?= lv_comp_ctrl->typed_context->btstatusparent->collection_wrapper->get_current( ).*
   check lv_btstatus_parent is bound.
    CASE lv_btstatus_parent->get_name( ).
        WHEN 'BTStatusH'.
          gc_relation_name = lc_us_header.
        WHEN 'BTStatusI'.
          gc_relation_name = lc_us_item.
    ENDCASE.
ENDIF.
CALL METHOD super->do_view_init_on_activation.
ENDMETHOD.
Here lv_btstatus_parent is bound during initial launch, however after navigating back to the same page, its blank leading to exception.
any suggestions would be helpful.
regards,
pradeep

solved myself

Creating Node for Context in a component controller disabled.

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