Help in Web dynpro research

Hello everyone, i m doing my masters research on Web Dynpro and i need some opinions of Web dynpro users..
Is it possible for u guys to answer some really simple questions and help me..
following are the questions.
1.Do you think Web Dynpro facilitates only in GUI development or it comprises other benefits as well?
2. How does Web dynpro helps a programmer?
3. To what extent does it help the programmer?? are there any possible alternatives??does a programmer requre anything more from web dynpro??
4. How the Web Dynpro is beneficial over traditional technology?
5. What shorcomings in encomapasses?
6.What are the other comparable technologies?
7. Are any improvemnts required in web dynpro in future???
Lot of questions here..answer them for me if you can..it will be a great help..
Cheers,
Dakshata Gulkhobare

Web Dynpro is the SAP programming model used to develop professional Web UIs for business applications. It consists of a runtime environment and a graphical development environment with special Web-Dynpro tools that are integrated in the SAP NetWeaver Developer Studio.
The Web Dynpro tools support application development during the implementation and design phases. When a Web Dynpro application is developed, a platform-independent metamodel is created from which Java classed are generated.
Since Web Dynpro features a clear separation between layout data and business data, you can develop Web Dynpro applications with the same programming model both for mobile devices and conventional PCs.
WebDynpro Provides Application Developers the following advantages:
1.Web Dynpro supports a structured design process
2. Strict separation of layout data and business data through use of the Model View Controller concept
3. Different implementation languages are supported
4.The use of declarative and graphical tools significantly reduces the implementation effort
5.Reuse and better maintainability by using components
6.Syntax check at design time
7. Automatic data transport using data binding is also possible.
8.Automatic input check.
9.Flicker-free screen construction.
10. Ensuring platform-independence with the meta model approach
11. Minimizing the implementation effort through declarative programming
12. Supporting a structured design process by applying the model view controller paradigm
13. Providing reuse and better maintainability by using components
14. Providing graphical support with tools in the Web Dynpro perspective
15. Providing the SAP NetWeaver Java Development Infrastructure (NWDI) which supports team work with different services such as source code versioning and the Central Build Service.
Please check these threads
Why Webdynpro
Why WebDynpro ?
Why webdynpro and not BSP or JSP?
Webdynpro vs. Struts
Web Dynpro vs. Struts - a few questions
Kind of applications smade thru Webdynpro
What kind of applications are being developed with Web Dynpro?
Advantages of webdynpro
Re: Why WebDynpro ?
Hope it helps.
Regards.
Rajat

Similar Messages

Search help for Web Dynpro using the SAP-search help

Hi,
Im trying to create a generic search help for Web Dynpro using the SAP-search help. It should working so, that I construct a Web Dynpro-component, that gets the data of the search help from the SAP-system, interpreted it and creates the ui-elements and the needed context generic.
The mapping between the Input field of the customerview and the right search help is to be made with an xml-file, which contains the information: name of the view, the input field, the search-help-name and the name of the field that will be returned.
The xml-file is reading from a helper-class. That helper-class contains any information, witch need the search help-component as well as the customer-component.
The initialization takes place in the method wdDoModify of the customer. The call of the search help from the customer should be implement with an Action, witch is bound to a Button(create dynamic in the helper-class behind the input field).
In a second foot should be create a plugin for eclipse, witch insert the used files (search help component, helper class, ) in the project. In addition it should create the call in the customer generic.
It would be great if someone can give me a feedback!

Hi Mike,
The BlanketAgreement.exe is a reference to the executable that will be created when you compile the solution you created in Part II - Part III. I think there is a mistake in the tutorial because it asks you to name the project 'Blanket' which means that by default the executable will be called Blanket.exe and not BlanketAgreement.exe. The tutorial also misses the step asking you to compile the Blanket project before you go on to create an installer. You should compile your Blanket project in Release mode before creating an installer. By compiling the project you'll get a Blanket.exe file in the bin folder of your Blanket project which you then need to add to the installer per the instructions.
SAP do offer development courses in some areas and there is training material here on the SDN and on the SAP partner portal (and maybe the customer portal as well). Try searching this forum for 'training' or 'tutorial' and you should get a few links. There's also a development certification.
Personally I'd recommend you give yourself a little project to work on and just get stuck in
Kind Regards,
Owen

How to create search help for Web Dynpro?

Hi all,
I have troubles when creating search help for web dynpro. I have visited this link /people/dirk.rehberg/blog/2006/12/27/generic-search-help-for-web-dynpro-for-java but I can't find this generic search help plug-in for download. If u have this plug-in can u share it for me or upload somewhere for download. Or anyone has already done this search help please help me solve this problem! Thanks in advance!

Hi Dinh Thieu Thien,
please place such a request to the appropriate forum "[Web Dynpro for Java|Web Dynpro Java;".
Thanks and regards,
Boris

How to create value help in web-dynpro-abap

Hi ,
can anybody tell me detailed step for creating value help in web-dynpro-abap .

Hi,
Web Dynpro provides two types of pre-implemented search helps :
1. ABAP Dictionary Search help
2. OVS
Input Help for WDA
http://help.sap.com/saphelp_nw04s/helpdata/en/b3/4d3642eca5033be10000000a1550b0/frameset.htm
There is a blog on implementing OVS help in WDA. You can refer below link for sample code.
/people/shruti.rathour/blog/2008/05/05/ovs-help-in-web-dynpro-abap
In addition, you can also provide help through Drop Downs and Select options.
Working with Select options in WDA
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/c09fec07-0dab-2a10-dbbe-c9a26bdff03e
Plz reward if helpful.
Thanks.
Raj.

Creating Search Help for Web Dynpro ABAP (FPM) Forms

Dear All ,
I am very new with SAP HCM P&F with FPM form. I am stuck with field search help functionality in FPM form. I have created on search help using
Web dynpro component to get all travel requests for all employees and linked it to FPM form field and its working fine....
But.... my requirement is how to filter travel request based on the PERNR (employee number) field in FPM form.
I think it can be achieved by using importing parameter LISTENER of interface IF_WD_VALUE_HELP_LISTENER but I am clueless how to pass PERNR to this interface to get travel requests for only employee number in field PERNR.
Kindly help me out in this issue.
Chohan

Use this code in set_value_help_listener
for e.g to read effective date.
wd_this->help_listener->f4_context_element->get_attribute( EXPORTING name = 'EFFECTIVE_DATE' IMPORTING value = wd_this->gv_eff_date ).

Search Help with Web Dynpro call on another system

Hi all,
I have to create a search help with web dynpro on a field but the database is on another system... How can I do?
Many Thanks in advance...

I would use a search help exit. Nothing WDA specific here, as this has been possible long before WDA came around. With a search help exit you define the search help like normal, but instead of database table or view being the source of selection, you have a function module. Within the coding of this function module you can call an RFC to read data from another system or call a web service if you need to bridge over to something that isn't ABAP based.
You can read more about Search Help Exits here:
http://help.sap.com/saphelp_nw70ehp1/helpdata/en/cf/21ee52446011d189700000e8322d00/frameset.htm

Search Help with Web Dynpro

Hi all,
I have to create a search help with web dynpro on a field but the database is on another system... How can I do?
Many Thanks in advance...

I would use a search help exit. Nothing WDA specific here, as this has been possible long before WDA came around. With a search help exit you define the search help like normal, but instead of database table or view being the source of selection, you have a function module. Within the coding of this function module you can call an RFC to read data from another system or call a web service if you need to bridge over to something that isn't ABAP based.
You can read more about Search Help Exits here:
http://help.sap.com/saphelp_nw70ehp1/helpdata/en/cf/21ee52446011d189700000e8322d00/frameset.htm

Search help in web dynpro Java i-view

Hi experts!!
I am new to EP so i need some help..
I am trying to implement some web dynpro i-views and i would like to know if there is any way to have F4 search help for fields in form template that correspond to R/3 fields. In other words i want to take the search help values from the R/3.
Should i create a model to call a BAPI for search help??? Or is there any other way?????
Thanx in advance...!!!
PS: will reward points to usefull answers.

Hi You can create Value Help in Webdynpro to show F4 Help values.
Follow this link
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/2833ce90-0201-0010-f1af-d3cfe1155b16
Reward Points if Helpful
Edited by: Praveen Kommineni on May 7, 2008 8:05 PM

Search help in web dynpro

Hallo dear all,
i defined a search help in the ABAP Dictionary and want to use it in a web dynpro. The search help is based on the data base table /BIC/PSCPLPROD (selection method).
It shall be used in a web dynpro that presents select-options (among others) for the field /BIC/SFINCUST of the table /BIC/SCPLPROD.
How can i realize that the selct-options field can automatically use the predefined search help?
I must explain additionally that the mentioned select options field is alreday linked to an other search help which unfortenately is unseless in this case. So Iwant to "overwrite" this link with the link to my search help on the DDIC.
Your answer would really minimize my project troubles. Many thanks in advance.
Best regards Dorothea.

why can't you have another field and have the required search help attched to it.
if you can control this at Dictionary level then the Problems at WebDynpro side is minimum.

How to put dynamic search help in web dynpro ABAP.

Hi,
I have a table element with two columns in my web dynpro ABAP.Both the columns are F4 helps.
Based on the value of the first column,the F4 help of second column must change dynamically.Kindly tell me how to do this.
Thanks & Regards,
Raji.

Hi ,
Use this code to dynamically assign search help and to deactivate search helps.
data lo_nd_info type if_wd_context_node_info.
lo_nd_info = lo_nd->get_node_info( ).
CALL METHOD lo_nd_info->set_attribute_value_help
EXPORTING
name = 'ATTR1' " Your attribute Name
value_help_mode = '121' " Valid value help mode
value_help = 'Z187442'. " Search help name
The various possible values that you can pass to value_help_mode are as shown below.
deactivated 101
automatic 111
ddic 121
ovs 131

CALL SEARCH HELP IN WEB DYNPRO

Description :
My web dynpro contains some buttons and allow some interaction...
One of the buttons is : 'LOAD DATA'...
I'd like to call a search help when the user PRESSES this button, how can i do that ? maybe a reusable component ???
Thank you...

Hi Stephan,
Well there is a way by which you can achieve this functionality... You need to call the static method HANDLE_VALUE_HELP of class CL_WDR_VALUE_HELP_HANDLER. To use it we simply need to pass in a reference to the context element, and the name of an attribute. It will then run the value help defined in the context for that attribute.
However being SAP internal, the method could change or disappear at any time. So this isn't a reliable approach. You would be better off following the approach suggested by the other users. I am however just quoting it for your inspection.
Suppose I have a context node by name NODE1 & an attribute MATNR under it of type MARA-MATNR. Now up on click on a button I want the search help MAT1 for MATNR to be displayed. Below is the coding for the buttons action handler:
method ONACTIONCALL_VALUE_HELP .
data: wd_node type ref to if_wd_context_node,
        wd_element type ref to if_wD_context_element.
wd_node = wd_context->get_child_node( name = 'NODE1' ).
wd_element = wd_node->get_element( index = 1 ).
CALL METHOD CL_WDR_VALUE_HELP_HANDLER=>HANDLE_VALUE_HELP
    EXPORTING
      CONTEXT_ELEMENT   = wd_element
      CONTEXT_ATTRIBUTE = 'MATNR'.
endmethod.
Regards,
Uday

Value Help in Web Dynpro Runtime

Hi all,
I have added value help in form. While running that application in an flash compiler,it is working correctly. But if i run in Web Dynpro Runtime . it shows the Internal Server Error. What may be the problem?
Whether i have to do any configuration?
Help me in this regard
Thanks & Regards,
Hemalatha J

Hi,
as Govindu mentioned only webservices are suported in the webdynpro runtime. Check [this wiki page |https://wiki.sdn.sap.com/wiki/display/VC/Flashvs.WebDynpro] for more details.
Best Regards,
Marcel

I need help regarding web dynpros.

what is web dynpro? and how to create it?

Hi,
Webdynpro is actually the front end that we use in Web Application server. It allows the developer to define screen and Workflow using Netweaver Developer Studio that call ABAP applicatons in the R/3 server.There are pre defined UI elements as well as APIs which we can use to write the logic.SAP has structured the WebApplication Server in such a way that we can easilly do the data binding between model,controller and view.
) How to build a Web Dynpro Application
http://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sapportals.km.docs/documents/a1-8-4/how%20to%20build%20a%20web%20dynpro%20application.pdf
2) How to program Portal Eventing
http://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sapportals.km.docs/documents/a1-8-4/how%20to%20program%20portal%20eventing
3) How to integrate a Web Dynpro Application into SAP EP 6.0
http://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sapportals.km.docs/documents/a1-8-4/how%20to%20integrate%20a%20web%20dynpro%20application%20into%20sap%20ep%206.0
Hope this helps you
Regards
Bala

Search help in Web Dynpro in ABAP

Hi,
I am starting with WD for ABAP (NW04s). I am using PA0022 table as model and displaying these values on the view. By default most of the fields like country, education centre, Faculty, Branch, Score come with an F4 option. But the value displayed in these fields are always key fields(Numeric), which would not make any sense for the end user. Now I would like the Text/Descriptions to be displayed against each field.
Can anyone help me out.
Regards,
<i><b>Seema.</b></i>

Hi Phil
This is the dump i m getting,
Note
The following error text was processed in the system D35 : Attribut LANGU konnte nicht gefunden werden. ¥ꯂ¦
The error occurred on the application server RETHR6_D35_01 and in the work process 0 .
The termination type was: RABAX_STATE
The ABAP call stack was:
Method: IF_WD_CONTEXT_NODE_INFO~GET_ATTRIBUTE of program CL_WDR_CONTEXT_NODE_INFO======CP
Method: GET_AND_FORMAT of program CL_WDR_DATA_CONTAINER=========CP
Method: IF_WDR_SHLP_CONTEXT_MANAGER~GET_VALUES of program CL_WDR_DEFAULT_SHLP_CONTEXT===CP
Method: CREATE_SEARCH_HELP of program CL_WDR_DDIC_SEARCH_HELP=======CP
Method: CONSTRUCTOR of program CL_WDR_VALUE_HELP_HANDLER=====CP
Method: HANDLE_DD_SHLP of program CL_WDR_VALUE_HELP_HANDLER=====CP
Method: HANDLE_VALUE_HELP of program CL_WDR_VALUE_HELP_HANDLER=====CP
Method: HANDLE_AFTER_UPDATE_DATA of program /1WDA/LSTANDARD===============CP
Method: IF_WDR_CLIENT~AFTER_CLIENT_UPDATES of program CL_WDR_CLIENT_SSR=============CP
Method: DO_AFTER_TRANSPORT of program CL_WDR_WINDOW_PHASE_MODEL=====CP
Plz help me out.
Regards,
Seema

How can I click to hande OVS and Search help for Web Dynpro

Once the F4 help is clicked, the event OVS of IF_WD_VALUE_HELP_FORWARD is triggered.
Here I would like to change the value list of F4 help list, I implemented a class and a method that handle that event.
Since event only has importing parameter, how can I change the exporting paramter?
Thanks
Xin.

hi,
when you click on F4 help, Event OVS is triggered.
now you can define an Event handler for OVS event.
Inside this Event handler , you can change the Value help list.
Inside the event handler there are three different phases to achieve this :
Phase 0 :configuration phase.
Phase 1 :Read values of the original context entered by user in Search Criteria.
Phase 2 : call business logic for a table of possible values.
Phase 3 : apply result.
Refer the SAP Standard Component : Demo_Value_help.

Help in Web dynpro research

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