Datagrid, Where Statement ?

Question

Hello All.
I have a datagrid that pulls all its data from a database.
It has two colums - String and Visibile.
I would like to create a function, that acts as a "Where" statement.  Its function should look at the datagrid and set the value of a label.text to the String from the datagrid whos Visible value is yes.  Only one string can have a visible value of Yes, the rest are no.
So basically all its got to do is look thru the datagrid and set the text value of a label to the string of the item whos visible = Yes.
Im not sure if this can be done with a "Where" statement.
I have tried looking about on Google, but no luck.
Im not sure if i have explained this well enough.  Let me know if i havent.
Thanks

Answer 1

Hello,  Thanks again for the reply.
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
               xmlns:s="library://ns.adobe.com/flex/spark"
               xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">
    <fx:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
    </fx:Declarations>
    <fx:Script>
        <![CDATA[
            import mx.collections.ArrayCollection;
            import mx.collections.XMLListCollection;
            import mx.controls.Alert;
            import mx.events.FlexEvent;
            import mx.events.ListEvent;
            import mx.messaging.ChannelSet;
            import mx.messaging.channels.AMFChannel;
            import mx.messaging.events.MessageAckEvent;
            import mx.messaging.events.MessageEvent;
            import mx.messaging.messages.AsyncMessage;
            import mx.rpc.events.FaultEvent;
            import mx.rpc.events.ResultEvent;
            import mx.rpc.xml.SimpleXMLEncoder;
            import mx.utils.ObjectUtil;
            import org.osmf.events.TimeEvent;       
            import spark.events.TextOperationEvent;
            [Bindable] private var StringArr:ArrayCollection = new ArrayCollection(
                    [{id:"1", string:"String 1", vis:"no"},
                    {id:"2", string:"String 2", vis:"no"},
                    {id:"3", string:"String 3", vis:"no"},
                    {id:"2", string:"String 4", vis:"no"},
                    {id:"2", string:"String 5", vis:"yes"},
                    {id:"2", string:"String 6", vis:"no"},]);
            protected function getString():void
        ]]>
    </fx:Script>
    <mx:DataGrid x="10" y="34" dataProvider="{StringArr}" editable="true">
        <mx:columns>
            <mx:DataGridColumn headerText="ID" dataField="id"/>
            <mx:DataGridColumn headerText="String" dataField="string"/>
            <mx:DataGridColumn headerText="Vis" dataField="vis"/>
        </mx:columns>
    </mx:DataGrid>
    <s:Label x="10" y="184" id="VisString" width="210"/>
    <s:Button x="237" y="184" label="Get String" click="getString()"/>
</s:Application>
here is my code, for the sake of the example, i have removed the connection to the database and just added an array into the code.  But in real the array is pulled from the database.
Now what i want, when the user clicks the "Get String" button, i want the function "getString" to look at the datagrid's array and find the String that has the value vis:Yes.  I then want it to return the String associated with that into the text value of VisString.
So for example, when you click "Get String" the function sees that string 5 has the visible Yes, so the text value of  VisString should change to "String 5"
Hope you now understand what  i mean ?