Inputfields validaion

Hi
I want to validate my input fields which i m using in mu webdynpro java application
here i m using sample application to display flightlistdetails..
here context i m having like this
context(contextnode)
bapi_flighlist_input(node)
        destinationfrom(childnode)
     city(attribute)
        destinationto(childnode)
     city(attribute)
   bapi_flightlist_output(node)
        flightlist(childnode)
              (some attributes)
here those city is input field
i m having button called submit
when i click on buttun, i should get flightlist details in a table
till here i got the output
but i wanna maintain city is madatory field
if i dont give any input...out put should not generate
for this i wrote the below code
i create a message at messagepool also
method:Checkmanditory
public void CheckMandatory( java.lang.String FieldName )
    //@@begin CheckMandatory()
     IWDMessageManager messageMgr = wdComponentAPI.getMessageManager();
     Object attributeValue = wdContext.currentDestination_FromElement().getAttributeValue(FieldName);
     IWDAttributeInfo attributeInfo = wdContext.getNodeInfo().getAttribute(FieldName);
     messageMgr.reportSuccess(wdContext.getNodeInfo().getAttribute(FieldName).toString());
     if (((String) attributeValue).length() == 0)
     messageMgr.reportContextAttributeMessage(
                                             wdContext.currentContextElement(),
                                             attributeInfo,
                                             IMessageFlightList_Comp.MISSING_INPUT,
                                             new Object[] { "City" },
                                             true);
    //@@end
action button: submit
public void onActionsubmit(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )
    //@@begin onActionsubmit(ServerEvent)
    this.CheckMandatory(IPrivateFlightList_View.IDestination_FromElement.CITY);
             wdThis.wdGetFlightList_CompController().executeBapi_Flight_Getlist_Input();
    //@@end
now after executnig n click on submit button, i m getting below error:
java.lang.NullPointerException
     at com.sccl.FlightList_View.CheckMandatory(FlightList_View.java:149)
     at com.sccl.FlightList_View.onActionsubmit(FlightList_View.java:169)
     at com.sccl.wdp.InternalFlightList_View.wdInvokeEventHandler(InternalFlightList_View.java:205)
     at com.sap.tc.webdynpro.progmodel.generation.DelegatingView.invokeEventHandler(DelegatingView.java:87)
     at com.sap.tc.webdynpro.progmodel.controller.Action.fire(Action.java:67)
     at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.doHandleActionEvent(WindowPhaseModel.java:420)
     at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.processRequest(WindowPhaseModel.java:132)
     at com.sap.tc.webdynpro.clientserver.window.WebDynproWindow.processRequest(WebDynproWindow.java:335)

Hi,
For this you have to link your input field with error message.
Create a message pool with message key and error message. after write code like this, here I am giving you the generic code, change as you want
//Report a message with reference to the context (links message to the offending field)
        msgMgr.reportContextAttributeMessage(
                              nodeElement,
                              attrInfo,
                              IMessage{nc}.{MessageKey},
                             new Object[] {p1,u2026,pn},
                            boolean);
// Metadata of context attribute {ca}, containing the erroneous value
     IWDAttributeInfo attrInfo =
                  wdContext.node{cn}.getNodeInfo().getAttribute({ca});
// Reference to element at lead selection, having {ca} as a child
     I{cn} Element nodeElement = wdContext. node{cn}.current{cn}Element();
Checking the Exception Manager for stored messages and terminate user coding processing
     wdComponentAPI.getMessageManager()
          .raisePendingException();
here is the step by step procedure for doing the above one
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/70361a88-d6ce-2a10-b1bc-c357097a7d26
http://help.sap.com/erp2005_ehp_03/helpdata/EN/36/d4528e6dbf084b9d79a50fb8d08e86/frameset.htm
regards,
Pradeep

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Gaurav

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Regards,
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How to change attribute "read_only" of a inputfield in a table?

Hi, experts,
action:
1.Create a table with name " A_TABLE" in the layout in a view.
2.Binding some fields from a structure to the table.
3.Field "Checkbox" is a checkbox type and field "input" is a inputfield type with readonly in the table "A_TABLE" .
4.I hope: When selecting a checkbox in the "Checkbox" colume in a row in the table, the field "input" corresponding will be changed readonly.
The follow is my code: When select Field "Checkbox" , the method is invoked.
method ONACTIONCLICK4DISDESC .
   data view           type ref to if_wd_view.
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Best regards,
tao

Hello Wang,
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How to set mandatory a InputField in standard Web Dynpro component?

Hi guys.
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Incredibly, my error text message appears in the MESSAGEAREA, and the UI components from GENERAL_DATA_VIEW are rightly still in the screen waiting for user answer since I set CANCEL_NAVIGATION = 'X', but the UI components from LAYOUT_VIEW (the buttons with navigate functions) changed like they had accepted my entry in spite of I set the code in this view. In fact, below my error text displayed, there is other (success) text which communicates "Standing approval for business trips exists" with a green tick.
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hi,
just make the input feild as mandatory in properties and use the following code.
data:
lo_view_controller type ref to if_wd_view_controller,
lo_dyn type ref to cl_wd_dynamic_tool.
Create Object
create object lo_dyn.
data lt_messages type lo_dyn->t_check_result_message_tab.
Get view controller reference
lo_view_controller = wd_this->wd_get_api( ).
Call Method to verify the element has the value or not
call method cl_wd_dynamic_tool=>check_mandatory_attr_on_view
exporting
view_controller = lo_view_controller
display_messages = ABAP_TRUE
importing
messages = lt_messages .
endmethod.
Regards,
Kranthi

Wdr:select_options and highlight Error Message with a Link to Inputfield

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I have created a InputField on a View using WDR_SELECT_OPTIONS. I want to validate this Input Field and give
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wd_this->lv_sel_handler =
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Dear Experts
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Hi Arun ,
you need to maintain the Meta data entries ,
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<%
DATA:
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Arun Prakash

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Edited by: Lavanya YH1504 on Jul 30, 2010 1:20 PM

I got it thank you.
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I have a problem here: I have a table on the screen, there are two columns which are inputfield,when user type something and press the "Enter" button, my program will check whether the value is correct or not. And when the input is wrong I want to point out the specific cell which is wrong by make the frame of the cell red, green or something else.
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hi,
check out this thread :
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I use the htmlb:tableView and defined one column as editable where a dropdown-list is assigned (by iterator).
In the "OnInputProcessing" I read the new selected value of the edit-column and write this value to my internal table.
Here the Coding of this:
Get Data for tv_cols, the current edited row, and update table
DATA: tab_view TYPE REF TO CL_HTMLB_TABLEVIEW.
DATA: tab_data TYPE REF TO CL_HTMLB_EVENT_TABLEVIEW.
DATA value TYPE STRING.
DATA: inputfield TYPE REF TO CL_HTMLB_INPUTFIELD.
FIELD-SYMBOLS: <row> TYPE ZSEM_0APPR_REQU_1.
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                        name         = 'tableView'
                        id           = 'tab_APPR_REQU_status' ).
get changes into internal table
get changes into internal table
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                        name         = 'inputField'
                        id           = value ).
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ENDIF.
last_selected_rowIndex = tab_data->SelectedRowIndex.
ENDIF.
Now my problem:
If I select a new line in the tableView the value of the line selected before is in the variable "inputField->value" and everything is working fine.
But if I had selected a line and changed the editable column and then push an save-button on the BSP-Site the variable "inputField->value" is empty. Though the "inputfield" itself was assigned correct.
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Whenever you select a new line the OnInputProcessing fires and you can read the value and store it then when the screen is rendered again the value is there and they are now on the new line to edit.
When you build the element into your table it is assigned the [tablename]_[cell]_[row] and if you know those items then you can do a simple get_form_field call.
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How to enable the InputField when press the Button

My sceanrio is by default the InputField is in disable .when ever i press the button it should enable.

Here is the sample code for HTMLB :
<hbj:inputField
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</hbj:page>
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Refer to the following links for more info...
http://help.sap.com/saphelp_nw04/helpdata/en/53/9d0e41a346ef6fe10000000a1550b0/content.htm
http://help.sap.com/saphelp_nw04/helpdata/en/43/067941a51a1a09e10000000a155106/content.htm
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Inputfields validaion

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