Dynamic Radiobutton Group By key in Web dynpro Java

Question

Hi I am making an online exam application in that there is a question and four options.  But when i am trying to create radiobuttons i could not bind options with radiobuttons. I tried using all three types of radiobuttons i.e single radiobuttons, group by index and group by key but the problem is the same
for(int j=0;j<4;j++)
    IWDRadioButtonGroupByIndex radioButtonGroupByIndex = (IWDRadioButtonGroupByIndex)view.createElement    (IWDRadioButtonGroupByIndex.class,"RadioButtonGroupByIndex1"ij);
radioButtonGroupByIndex.bindTexts("Questions.option"+wdContext.nodeQuestions().getQuestionsElementAt(i).getOption());
radioButtonGroupByIndex.setColCount(1);
transparentContainer.addChild(radioButtonGroupByIndex);
The problem is I get the same set of options in all the questions.
I am confused at what code should i write in bindTexts in groupby index and bindSelectedKey in groupby key
Please help
Swapnil Indulkar

Answer 1

That's absolutely genius, Armin !
This didn't strike my mind. Wonderful solution.
However i have managed to achieve it in a bit complex way as compared to yours.
(I have hard-coded it for 3 questions with 4 options each.)
//Code in wdDoInit() of View
     g_questionNode = wdThis.wdGetAPI().getContext().getRootNode().getChildNode("Questions", IWDNode.LEAD_SELECTION);
     g_optionsNode = wdThis.wdGetAPI().getContext().getRootNode().getChildNode("Options", IWDNode.LEAD_SELECTION);
     for(int i=0; i<3; i++){
          g_questionNode.getNodeInfo().addAttribute("Question"+i,"com.sap.dictionary.string");
          g_questionNode.getCurrentElement().setAttributeValue("Question"+i, "This is QuestionText["+ i+"] ?");
          g_optionsNode.getNodeInfo().addAttribute("Option"+i,"com.sap.dictionary.string");
          IModifiableSimpleValueSet optionsSet = g_optionsNode.getNodeInfo().getAttribute("Option"+i).getModifiableSimpleType().getSVServices().getModifiableSimpleValueSet();
          for(int j=0; j<4; j++){
               optionsSet.put("Q"+i+"O"+j, "This is optionText[" +j +"] for QuestionText[" + i + "]");
//Code in wdDoModifyView()
    if(firstTime){
          IWDTransparentContainer rootContainer = (IWDTransparentContainer) view.getElement("RootUIElementContainer");
          for(int i=0; i<3; i++){
               IWDLabel label = (IWDLabel) view.createElement(IWDLabel.class, "label_"+i);
               rootContainer.addChild(label);
               label.bindText(g_questionNode.getNodeInfo().getAttribute("Question"+i));
               label.setDesign(WDLabelDesign.EMPHASIZED);
               IWDGridData labelGridData = (IWDGridData) label.createLayoutData(IWDGridData.class);
               labelGridData.setCellBackgroundDesign(WDCellBackgroundDesign.PLAIN);
               labelGridData.setHAlign(WDCellHAlign.CENTER);
               IWDRadioButtonGroupByKey rbgbk = (IWDRadioButtonGroupByKey)view.createElement (IWDRadioButtonGroupByKey.class,"rbgbk_"+i);
               rootContainer.addChild(rbgbk);
               label.setLabelFor("rbgbk_"+i);
               rbgbk.bindSelectedKey(g_optionsNode.getNodeInfo().getAttribute("Option"+i));
               IWDGridData rbgbkGridData = (IWDGridData) rbgbk.createLayoutData(IWDGridData.class);
               rbgbkGridData.setCellBackgroundDesign(WDCellBackgroundDesign.PLAIN);
               rbgbkGridData.setHAlign(WDCellHAlign.CENTER);
This works fine too.
With regards,
Amey Mogare