If i select a check box i cant able to get the values in language columns in datagird??.......whats

Question

<?xml version="1.0"?>
<!-- dpcontrols\ModifyDataGridData.mxml -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" width="500"
                height="600" >
    <mx:Script>
        <![CDATA[
            import mx.collections.*;
            import mx.controls.*;
            import mx.events.*;
            import mx.utils.object_proxy;
            // Add event information to a log (displayed in the TextArea).
            public function collectionEventHandler(event:CollectionEvent):void {
                switch(event.kind) {
                    case CollectionEventKind.ADD:
                        addLog("Item "+ event.location + " added");
                        break;
                    case CollectionEventKind.REMOVE:
                        addLog("Item "+ event.location + " removed");
                        break;
                    case CollectionEventKind.REPLACE:
                        addLog("Item "+ event.location + " Replaced");
                        break;
                    case CollectionEventKind.UPDATE:
                        addLog("Item updated");
                        break;
            // Helper function for adding information to the log.
            public function addLog(str:String):void {
    //        log.text += str + "\n";
            // Add a person to the ArrayCollection.
            public function addPerson():void {
                var s:String;
                var l:String;
                if(rg1.selected)
                    s=rg1.label;
                else
                    s=rg2.label;
                if(ENG.selected)
                    l=ENG.label;
                else
                    l=TAM.label;
                if(ENG.selected && TAM.selected)
                    l=ENG.label.toString()+'&'+TAM.label.toString();
                ac.addItem({Name:NameInput.text, Age:AgeInput.text,Sex:s ,Languagesknown:l});
                clearInputs();
            // Remove a person from the ArrayCollection.
            public function removePerson():void {                // Make sure an item is selected.
                if (dg.selectedIndex >= 0) {
                    ac.removeItemAt(dg.selectedIndex);
            // Update an existing person in the ArrayCollection.
            public function updatePerson():void {
                var s:String;
                var l:String;
                if(rg1.selected)
                    s=rg1.label;
                else
                    s=rg2.label;
                if(ENG.selected)
                    l=ENG.label;
                if(TAM.selected)
                    l=TAM.label;
                if(ENG.selected && TAM.selected)
                    l=ENG.label.toString()+'&'+TAM.label.toString();
                // Make sure an item is selected.
                if(dg.selectedItem !== null) {
                    ac.setItemAt({Name:NameInput.text, Age:AgeInput.text,Sex:s,languageknown:l},dg.selectedIndex);
            // The change event listener for the DataGrid.
            // Clears the text input controls and updates them with the contents
            // of the selected item.
            public function dgChangeHandler():void {
                var s:String;
                var l:String;
                if(rg1.selected)
                    s=rg1.label;
                else
                    s=rg2.label;
                if(ENG.selected)
                    l=ENG.label;
                if(TAM.selected)
                    l=TAM.label;
                if(ENG.selected && TAM.selected)
                    l=ENG.label.toString()+'&'+TAM.label.toString();
                clearInputs();
                NameInput.text = dg.selectedItem.Name;
                AgeInput.text = dg.selectedItem.Age;
                s=dg.selectedItem.Sex;
                l=dg.selectedItem.Languageknown;
            // Clear the text from the input controls.
            public function clearInputs():void {
                var s:String;
                var l:String;
                if(rg1.selected)
                    s=rg1.label;
                else
                    s=rg2.label;
                if(ENG.selected)
                    l=ENG.label;
                if(TAM.selected)
                    l=TAM.label;
                if(ENG.selected && TAM.selected)
                    l=ENG.label.toString()+'&'+TAM.label.toString();
                NameInput.text = "";
                AgeInput.text = "";
                s="";
                l="";
        ]]>
    </mx:Script>
    <!-- The ArrayCollection used by the DataGrid and ComboBox. -->
    <mx:ArrayCollection id="ac"
                        collectionChange="collectionEventHandler(event)">
    </mx:ArrayCollection>
    <mx:DataGrid width="450" id="dg" dataProvider="{ac}"
                 change="dgChangeHandler()">
        <mx:columns>
            <mx:DataGridColumn dataField="Name" headerText="Name"/>
            <mx:DataGridColumn dataField="Age" headerText="Age"/>
            <mx:DataGridColumn dataField="Sex" headerText="Sex"/>
            <mx:DataGridColumn dataField="Languageknown" headerText="Languageknown"/>
        </mx:columns>
    </mx:DataGrid>
    <!-- Form for data to add or change in the ArrayCollection. -->
    <mx:Form>
        <mx:FormItem label="Name">
            <mx:TextInput id="NameInput"/>
        </mx:FormItem>
        <mx:FormItem label="Age">
            <mx:TextInput id="AgeInput"/>
        </mx:FormItem>
        </mx:Form>
    <mx:Form width="300" height="90">
        <mx:RadioButtonGroup id="radiogroup1"/>
        <mx:FormItem width="53" label="Sex">
        </mx:FormItem>
        <mx:RadioButton id="rg1" label="Male"  groupName="radiogroup1"/>
        <mx:RadioButton id="rg2" label="Female" groupName="radiogroup1"/>
    </mx:Form>
    <mx:Form x="98" width="304" height="150">
        <mx:FormItem label="Languages known" >
        </mx:FormItem>
        <mx:CheckBox id="ENG" label="English" 
                     />
        <mx:CheckBox id="TAM" label="Tamil" />
        </mx:Form>
    <mx:HBox>
        <!-- Buttons to initiate operations on the collection. -->
        <mx:Button label="Add New" click="addPerson()"/>
        <mx:Button label="Update Selected" click="updatePerson()"/>
        <mx:Button label="Remove Selected" click="removePerson()"/>
        <!-- Clear the text input fields. -->
        <mx:Button label="Clear" click="clearInputs()"/>
    </mx:HBox>
</mx:Application>

Answer 1

Hi gayathriguru,
You just need to correct the name for Languageknown while inserting object into array collection.
ac.addItem({Name:NameInput.text, Age:AgeInput.text,Sex:s ,Languagesknown:l});
You have by mistaken written it as Languagesknown instead of Languageknown. (<mx:DataGridColumn dataField="Languageknown" headerText="Languageknown"/>)
Thanks and Regards
Pooja Kuber | [email protected] | www.infocepts.com