setting checked value of a Radio Button Group server Side

Question

In a repeat (var=row, indexVar=rownumber) ,I can't get the the defaultselected to work . The return value becomes correctly "true" but doesn't work.

The idea is that 1 radio from this radiogroup ("selection") is preselected, based on the value in the viewScope selectie.

<xp:radio id="radio1" value="#{viewScope.test}" groupName="selection">
            <xp:this.text><![CDATA[#{javascript:row[3]}]]>
            </xp:this.text>                                                     
       <xp:this.defaultSelected><![CDATA[#{javascript:var check = "no";
         try{
           for (i=0;i<25;i++){
             if( @IsMember(row[4],viewScope.selectie[0][i])==1){var 
             check="true";break}//only 1 can be checked
           }//end for i
          if (check=="true"){return true}
          else {return false}
        }//end try
        catch (e){
          sessionScope.error = "error radio1 :"+e.toString();}}]]>
    </xp:this.defaultSelected>
    <xp:eventHandler event="onchange" submit="true" refreshMode="partial" 
     refreshId="resultPanel">
         <xp:this.action><![CDATA[#{javascript:var item 
             =viewScope.lijnknr.intValue();
             viewScope.selectie[0].set(item,row[4]);}]]>
         </xp:this.action>
    </xp:eventHandler>
</xp:radio>

EDIT I added following line : <xp:this.selectedValue><![CDATA[#{javascript:row[4]}]]></xp:this.selectedValue> since I read following post : Xpages radio btn group checked

but it still doesn't work .....

SECOND EDIT added another property : skipContainers="1" as found in "Mastering Xpages",

but still doesn't work ....

Answer 1

An alternative approach, if possibile, is to to use the radioGroup component:

<xp:radioGroup value="#{viewScope.fruit}" defaultValue="orange">
    <xp:selectItems value="#{javascript:['apple', 'orange', 'banana']}" />
    <xp:eventHandler event="onclick" submit="true"
        execMode="partial" refreshMode="partial" refreshId="result" />
</xp:radioGroup>

<xp:div id="result">
    <xp:text value="The selected fruit is: #{empty viewScope.fruit ? 'none' : viewScope.fruit}" />
</xp:div>

Answer 2

IMPORTANT EDIT!

What I wrote below stands if the radios were declared one by one - therefore outside the repeat component. When placed inside the repeat component there's a bug that prevents the radio group from working as one. In fact, the output name param results different for every looped radio component...

---

I don't see your whole code there so I will go with an example. Consider the following (and for brevity's sake I will commit this sin of using SSJS sometimes):

<xp:repeat value="#{javascript: ['apple', 'orange', 'banana']}"
    var="fruit">
    <xp:radio groupName="fruits" selectedValue="#{fruit}"
        value="#{viewScope.fruit}" defaultSelected="#{fruit eq 'orange'}" text="#{fruit}" />
</xp:repeat>

I passed an on-the-fly array to the repeat control and I will reference each value as fruit.

At this point I populate the radio component:

1. I used the same groupName to group the radios (this you know)
2. I assigned the selectedValue to the current fruit. This is the value that will be saved if the radio gets selected
3. I bound value to the property where the selected value will actually be saved (in this case, like you did, I went for the viewScope)
4. I set the defaultSelected value (evaluated from the literal value orange but you can do it differently). In case viewScope.fruit is empty orange will be the default value.
5. I assigned the text - label - again to the current fruit variable

Again, this will give you the orange choice as default selection in case the variable viewScope.fruit is empty. If, supposedly, you had assigned a value to the viewScope during page load like, say:

<xp:view xmlns:xp="http://www.ibm.com/xsp/core" beforePageLoad="#{javascript: viewScope.fruit = 'banana'}">

Then the selected radio would not have been orange but banana.

Regarding the eventHandler, it's not clear to me what you're trying to achieve there. If you want to further explain maybe I can help there also.