Can you please file a bug at http://bugs.adobe.com/flex/ and include a test case which shows the error.

Thanks,
Peter

I want to be able to set the background of the second, third and forth columns to #555555 but as soon as I try, I get script errors.

http://www.battletech-live.net/error1010.png

if the value in column1 is true then the backgroundcolor of column2 must be red or else if the value in column1 is false then the backgroundcolor of column 2 must be
blue

If possible plase let me, how convert the colums as a rows?
arraycollection(a:’col1′,b:’col2′)

To round to two decimals you can use <Number>.toFixed(2), or you can use a CurrencyFormatter or NumberFormatter.

As for your other question, this should get you somewhat close, but there are still a few bugs in the code. Most notably:
(a) Rearranging columns in the top DataGrid control causes the column order in the top and bottom data grid to get out of sync.
(b) Changing data providers on the top DataGrid doesn’t correctly update the values in the bottom DataGrid. You’ll need to add additional logic/code.

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        horizontalAlign="left"
        verticalAlign="top"
        initialize="init();">

 <mx:Script>
  <![CDATA[
   import mx.collections.ArrayCollection;
   import mx.controls.Alert;
   import mx.controls.Label;
   import mx.controls.dataGridClasses.DataGridColumn;
   import mx.events.CollectionEvent;
   import mx.events.DataGridEvent;
   import mx.utils.ObjectUtil;

   private function resizeCols(event:Event=null) : void {
    if(dgS.rowCount > dgS.dataProvider.length)
      dgtot.width = dgS.width;
     else
      dgtot.width = dgS.width-16;
   }

   private function resizeCol(event : DataGridEvent) : void {
    DataGridColumn(dgtot.columns[event.columnIndex]).width = DataGridColumn(dgS.columns[event.columnIndex]).width;
   }

   private function sum_labelFunc(item:Object, col:DataGridColumn):String {
    var sum:Number = Number(item.Price) * Number(item.Quantity);
    return currencyFormatter.format(sum);
   }

   private function currency_labelFunc(item:Object, col:DataGridColumn):String {
    return currencyFormatter.format(item[col.dataField]);
   }

   private function sum_sortCompareFunc(a:Object, b:Object):int {
    var sumA:Number = Number(sumCol.itemToLabel(a));
    var sumB:Number = Number(sumCol.itemToLabel(b));
    return ObjectUtil.numericCompare(sumA, sumB);
   }

   [Bindable]
   public var dpADG:ArrayCollection = new ArrayCollection([
    {Artist:'Pavement',      Album:'Slanted and Enchanted',  Price:11.99, Quantity:10},
    {Artist:'Pavement',      Album:'Brighten the Corners',   Price:11.99, Quantity:-12},
    {Artist:'Saner',         Album:'A Child Once',           Price:11.99, Quantity:30},
    {Artist:'Saner',         Album:'Helium Wings',           Price:12.99, Quantity:45},
    {Artist:'The Doors',     Album:'The Doors',              Price:10.99, Quantity:60},
    {Artist:'The Doors',     Album:'Morrison Hotel',         Price:12.99, Quantity:45},
    {Artist:'Grateful Dead', Album:'American Beauty',        Price:11.99, Quantity:23},
    {Artist:'Grateful Dead', Album:'In the Dark',            Price:11.99, Quantity:36},
    {Artist:'Grateful Dead', Album:'Shakedown Street',       Price:11.99, Quantity:73},
    {Artist:'The Doors',     Album:'Strange Days',           Price:12.99, Quantity:11},
    {Artist:'The Doors',     Album:'The Best of the Doors',  Price:10.99, Quantity:19},
    {Artist:'The Doors2',    Album:'The Best of the Doors2', Price:10.99, Quantity:21}
   ]);

   private var dpADG2:ArrayCollection = new ArrayCollection([
    {Artist:'Pavement',      Album:'Slanted and Enchanted', Price:11.99, Quantity:12},
    {Artist:'Pavement',      Album:'Brighten the Corners',  Price:11.99, Quantity:76},
    {Artist:'Saner',         Album:'A Child Once',          Price:11.99, Quantity:98},
    {Artist:'Saner',         Album:'Helium Wings',          Price:12.99, Quantity:54},
    {Artist:'The Doors',     Album:'The Doors',             Price:10.99, Quantity:79},
    {Artist:'The Doors',     Album:'Morrison Hotel',        Price:12.99, Quantity:28},
    {Artist:'Grateful Dead', Album:'American Beauty',       Price:11.99, Quantity:39},
    {Artist:'Grateful Dead', Album:'In the Dark',           Price:11.99, Quantity:30},
    {Artist:'Grateful Dead', Album:'Shakedown Street',      Price:11.99, Quantity:38}
   ]);

    private function init():void {
        dpADG.addEventListener(CollectionEvent.COLLECTION_CHANGE, dpADG_collectionChange);
        dpADG.refresh();
    }

    private var quantityTotal:Number;
    private var sumTotal:Number;

    private function dpADG_collectionChange(evt:CollectionEvent):void {
        quantityTotal = 0;
        sumTotal = 0;
        dpADG.source.forEach(quantitySum);
        var it:Object = dpADGTotal.getItemAt(0);
        it.Quantity = quantityTotal;
        it.Sum = sumTotal;
        dpADGTotal.setItemAt(it, 0);
    }

    private function quantitySum(item:*, index:int, array:Array):void {
        quantityTotal += item.Quantity;
        var sum:Number = Number(item.Price) * Number(item.Quantity);
        sumTotal += sum;
    }

   [Bindable]
   private var dpADGTotal:ArrayCollection = new ArrayCollection([
    {Artist:'', Album:'Total', Quantity:'', Sum:''}
   ]);

  ]]>
 </mx:Script>
 <mx:Style>
  .title {
   text-align: center;
   font-weight: bold;
  }
  .body {
   text-align: right;
   padding-right: 10;
  }
 </mx:Style>

 <mx:NumberFormatter id="numberFormatter"/>
 <mx:CurrencyFormatter id="currencyFormatter" precision="2" />

 <mx:Button label="{'Switch to Dataprovider '+ (dgS.dataProvider == dpADG ? 'without' : 'with') +'  scroll'}"
         click="dgS.dataProvider = (dgS.dataProvider == dpADG ? dpADG2 : dpADG);"/>

 <mx:VBox width="100%" height="100%" verticalGap="0">
  <mx:DataGrid id="dgS"
               dataProvider="{dpADG}"
               height="40%" width="100%"
               resize="resizeCols();"
               columnStretch="resizeCol(event);"
               creationComplete="dgS.addEventListener(CollectionEvent.COLLECTION_CHANGE, resizeCols, false, 0, true);"
               editable="true"
               textAlign="right">
   <mx:columns>
    <mx:DataGridColumn id="dcArt"
            dataField="Artist"
            textAlign="left"
            headerStyleName="title" />
    <mx:DataGridColumn dataField="Album"
            textAlign="left"
            headerStyleName="title" />
    <mx:DataGridColumn dataField="Quantity"
            textAlign="right"
            headerStyleName="title"
            paddingRight="10"
            editable="true"
            itemEditor="mx.controls.NumericStepper"
            editorDataField="value" />
    <mx:DataGridColumn dataField="Price"
            textAlign="right"
            headerStyleName="title"
            paddingRight="10"
            labelFunction="currency_labelFunc" />
    <mx:DataGridColumn id="sumCol"
            textAlign="right"
            headerStyleName="title"
            paddingRight="10"
            editable="false"
            headerText="Sum"
            labelFunction="sum_labelFunc"
            sortCompareFunction="sum_sortCompareFunc" />
   </mx:columns>
  </mx:DataGrid>
  <mx:DataGrid id="dgtot"
               width="40%"
               dataProvider="{dpADGTotal}"
               showHeaders="false"
               rowCount="1"
               height="{dgtot.rowHeight}"
               creationComplete="{resizeCols()}"
               fontWeight="bold">
   <mx:columns>
    <mx:DataGridColumn/>
    <mx:DataGridColumn dataField="Album"
            textAlign="right"
            fontStyle="italic"
            paddingRight="10" />
    <mx:DataGridColumn dataField="Quantity"
            textAlign="right"
            paddingRight="10" />
    <mx:DataGridColumn dataField="Price" />
    <mx:DataGridColumn dataField="Sum"
            textAlign="right"
            paddingRight="10"
            labelFunction="currency_labelFunc" />
   </mx:columns>
  </mx:DataGrid>
 </mx:VBox>

</mx:Application>

Peter

I have two questions in the script below:
- How round the result in each row of the sum column (2 decimales) , i tried toString but i have an error.
- Is it possible, and how, to pass the total quantity and the total sum in an other datagrid in order to display the result.

Thank for your help

Regards

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" horizontalAlign="left" verticalAlign="top">
 <mx:Script>
  <![CDATA[
   import mx.controls.Label;
   import mx.controls.dataGridClasses.DataGridColumn;
   import mx.utils.ObjectUtil;
   import mx.events.CollectionEvent;
   import mx.collections.ArrayCollection;
   import mx.controls.Alert;
   import mx.events.DataGridEvent;

   private function resizeCols(event:Event=null) : void {
    if(dgS.rowCount > dgS.dataProvider.length)
      dgtot.width = dgS.width;
     else
      dgtot.width = dgS.width-16;
   }

   private function resizeCol(event : DataGridEvent) : void {
    DataGridColumn(dgtot.columns[event.columnIndex]).width = DataGridColumn(dgS.columns[event.columnIndex]).width;
   }

   private function sum_labelFunc(item:Object, col:DataGridColumn):Number {
    var sum:Number = Number(item.Price) * Number(item.Quantity);
    return sum;
   }

   private function sum_sortCompareFunc(a:Object, b:Object):int {
    var sumA:Number = Number(sumCol.itemToLabel(a));
    var sumB:Number = Number(sumCol.itemToLabel(b));
    return ObjectUtil.numericCompare(sumA, sumB);
   }

   [Bindable]
   public var dpADG:ArrayCollection = new ArrayCollection([
    {Artist:'Pavement',      Album:'Slanted and Enchanted',  Price:11.99, Quantity:10},
    {Artist:'Pavement',      Album:'Brighten the Corners',   Price:11.99, Quantity:-12},
    {Artist:'Saner',         Album:'A Child Once',           Price:11.99, Quantity:30},
    {Artist:'Saner',         Album:'Helium Wings',           Price:12.99, Quantity:45},
    {Artist:'The Doors',     Album:'The Doors',              Price:10.99, Quantity:60},
    {Artist:'The Doors',     Album:'Morrison Hotel',         Price:12.99, Quantity:45},
    {Artist:'Grateful Dead', Album:'American Beauty',        Price:11.99, Quantity:23},
    {Artist:'Grateful Dead', Album:'In the Dark',            Price:11.99, Quantity:36},
    {Artist:'Grateful Dead', Album:'Shakedown Street',       Price:11.99, Quantity:73},
    {Artist:'The Doors',     Album:'Strange Days',           Price:12.99, Quantity:11},
    {Artist:'The Doors',     Album:'The Best of the Doors',  Price:10.99, Quantity:19},
    {Artist:'The Doors2',    Album:'The Best of the Doors2', Price:10.99, Quantity:21}
   ]);

   private var dpADG2:ArrayCollection = new ArrayCollection([
    {Artist:'Pavement',      Album:'Slanted and Enchanted', Price:11.99, Quantity:12},
    {Artist:'Pavement',      Album:'Brighten the Corners',  Price:11.99, Quantity:76},
    {Artist:'Saner',         Album:'A Child Once',          Price:11.99, Quantity:98},
    {Artist:'Saner',         Album:'Helium Wings',          Price:12.99, Quantity:54},
    {Artist:'The Doors',     Album:'The Doors',             Price:10.99, Quantity:79},
    {Artist:'The Doors',     Album:'Morrison Hotel',        Price:12.99, Quantity:28},
    {Artist:'Grateful Dead', Album:'American Beauty',       Price:11.99, Quantity:39},
    {Artist:'Grateful Dead', Album:'In the Dark',           Price:11.99, Quantity:30},
    {Artist:'Grateful Dead', Album:'Shakedown Street',      Price:11.99, Quantity:38}
   ]);

   [Bindable]
   private var dpADGTotal:ArrayCollection = new ArrayCollection([
    {Artist:'', Album:'Total', Quantity:'XXX.XX'}
   ]);

  ]]>
 </mx:Script>
 <mx:Style>
  .title {
   text-align:center;
   font-weight:bold;
  }
  .body {
   text-align:right;
   padding-right:10;
  }
 </mx:Style>

 <mx:NumberFormatter id="numberFormatter"/>

 <mx:Button label="{'Switch to Dataprovider '+ (dgS.dataProvider == dpADG ? 'without' : 'with') +'  scroll'}" click="{dgS.dataProvider = (dgS.dataProvider == dpADG ? dpADG2 : dpADG)}"/>

 <mx:VBox width="100%" height="100%" verticalGap="0">
  <mx:DataGrid id="dgS"
               dataProvider="{dpADG}"
               height="40%" width="40%"
               resize="{resizeCols()}"
               columnStretch="{resizeCol(event)}"
               creationComplete="{dgS.addEventListener(CollectionEvent.COLLECTION_CHANGE, resizeCols, false, 0, true)}"
               editable="true"
               textAlign="right">
   <mx:columns>
    <mx:DataGridColumn dataField="Artist"   id="dcArt" textAlign="left"  headerStyleName="title"/>
    <mx:DataGridColumn dataField="Album"               textAlign="left"  headerStyleName="title"/>
    <mx:DataGridColumn dataField="Quantity"            textAlign="right" headerStyleName="title" paddingRight="10"
                       editable="true" itemEditor="comps.MyNumericStepper" editorDataField="value"/>
    <mx:DataGridColumn dataField="Price"               textAlign="right" headerStyleName="title" paddingRight="10"/>
    <mx:DataGridColumn                      id="sumCol" textAlign="right" headerStyleName="title" paddingRight="10"
                       editable="false"
                       headerText="Sum"
                       labelFunction="sum_labelFunc"
                       sortCompareFunction="sum_sortCompareFunc" />
   </mx:columns>
  </mx:DataGrid>
  <mx:DataGrid id="dgtot"
               width="40%"
               dataProvider="{dpADGTotal}"
               showHeaders="false"
               rowCount="1"
               height="{dgtot.rowHeight}"
               creationComplete="{resizeCols()}"
               fontWeight="bold">
   <mx:columns>
    <mx:DataGridColumn/>
    <mx:DataGridColumn dataField="Album"               textAlign="right" fontStyle="italic" paddingRight="10"/>
    <mx:DataGridColumn dataField="Quantity"            textAlign="right"                    paddingRight="10"/>
    <mx:DataGridColumn dataField="Price"/>
    <mx:DataGridColumn                    id="sumLign" textAlign="right"                 paddingRight="10"
                       labelFunction="sum_labelFunc"/>
   </mx:columns>
  </mx:DataGrid>
 </mx:VBox>

</mx:Application>

thank you for your prompt response.

Best regards.