You can't use selectedItem because there is no selectedItem. You haven't clicked a row. Try looping through the grid.
In the end, I really don't understand why you don't do this in the dataCollection, or even in the source data. for (var i:Number = 0; i < mygrid.numChildren; i++) { if (mygrid.getChildAt(i)["Kind"] == "LONG") { mygrid.getChildAt(i)["Profit"] = "Profit"; } else { mygrid.getChildAt(i)["Profit"] = "ShProfit"; } --- In flexcoders@yahoogroups.com, "Craig" <cra...@...> wrote: > > Ok... In the parent component to the datagrid I used an initialize event: > > public function initDg():void { > > if(dgOrdExt.selectedItem["Kind"]=="LONG")dgOrdExt.Profit.dataField="Profit"; > if(dgOrdExt.selectedItem["Kind"]=="SHORT")dgOrdExt.Profit.dataField="ShProfit"; > > } > > it does not work. but if I replace the code with > dgOrdExt.dataField="Profit"; which just sets the dataField without > referencing the other column the code is all working... > > I also tried creationcomplete event and that did not work either. > > > > --- In flexcoders@yahoogroups.com, "Craig" <craigj@> wrote: > > > > cause I was doing it within the custom component (column) itself for the > > datagrid, which can not hold an Id value, I can put it in the parent > > component however.... i'll give that a whack. > > > > > > --- In flexcoders@yahoogroups.com, "postwick" <paul@> wrote: > > > > > > Not sure why you have all the Application.application stuff on there. > > > Just reference the datagrid by it's id. > > > > > > <mx:DataGrid id="mygrid"....> > > > > > > mygrid.selectedItem["columname"] = "some value" > > > > > > --- In flexcoders@yahoogroups.com, "Craig" <craigj@> wrote: > > > > > > > > From within the custom component DataGrid Column I tried this code as > > > > you suggested at the initialize event but it errors: > > > > > > > > > > > > if(Application.application.CnvPos.dgOrdExt.selectedItem["Kind"]=="LONG") > > > > Profit.dataField="Profit"; > > > > > > > > > > > > I don't think the selecteditem field is the answer. > > > > > > > > > > > > > > > > > > > > --- In flexcoders@yahoogroups.com, "Craig" <craigj@> wrote: > > > > > > > > > > yes the datagrid is bound to an array collection. > > > > > I don't want to select any item, I want to change the value of a > > > > > column's DataField to a one of two values based on the value of > > > > > another column's output. > > > > > > > > > > I don't want to have to 'selecteditem' but I can try that code below > > > > > are you suggesting that I use it in the labelfunction of the datagrid > > > > > column that I am trying to change? > > > > > > > > > > > > > > > --- In flexcoders@yahoogroups.com, "postwick" <paul@> wrote: > > > > > > > > > > > > Is the datagrid bound to a collection? if so, change the value in > > > > > > the collection. > > > > > > > > > > > > or try... > > > > > > > > > > > > yourDataGrid.selectedItem["dataColumn1"] = > > > > > > yourDataGrid.selectedItem["dataColumn2"] > > > > > > > > > > > > --- In flexcoders@yahoogroups.com, "Craig" <craigj@> wrote: > > > > > > > > > > > > > > I am trying to set the value of a column based on the value of > > > > > > > another column. If I use ...selectedItem... it does not work, > > > > > > > unless I am mistaken. > > > > > > > > > > > > > > --- In flexcoders@yahoogroups.com, "postwick" <paul@> wrote: > > > > > > > > > > > > > > > > You access the value in a column of a datagrid like this... > > > > > > > > > > > > > > > > yourDataGrid.selectedItem["dataColumnNameOfColumn"] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > --- In flexcoders@yahoogroups.com, "Craig" <craigj@> wrote: > > > > > > > > > > > > > > > > > > I GIVE UP!! I have tried everything!!.. I have a dataGrid > > > > > > > > > that binds to > > > > > > > > > an ArrayCollection. I need to change the value of one > > > > > > > > > columen (Profit) > > > > > > > > > based on the value of another column (Kind) ie.. the results > > > > > > > > > (either > > > > > > > > > 'LONG' or SHORT'). Here is where I'm at. I've tried putting > > > > > > > > > code into > > > > > > > > > customer DataGridColumns and labelFunctions and > > > > > > > > > ItemRenderers... but can > > > > > > > > > not do it. What seem to be working most are events in the > > > > > > > > > DataGrid > > > > > > > > > Component, better than others, but comparing values in a > > > > > > > > > DataGrid is > > > > > > > > > obviously impossible. > > > > > > > > > > > > > > > > > > Somehow I need the code to access ArrayCollection getItemat() > > > > > > > > > but I > > > > > > > > > can't do it! > > > > > > > > > > > > > > > > > > Please help! > > > > > > > > > > > > > > > > > > <mx:DataGrid xmlns:mx="http://www.adobe.com/2006/mxml" > > > > > > > > > initialize="initTA()"> > > > > > > > > > > > > > > > > > > <positions:KindColumn id="Kind" > > > > > > > > > headerText="Kind" > > > > > > > > > dataField="Kind" > > > > > > > > > > > > > > > > > > itemRenderer="com.steury.baseClasses.CellFieldTrd"/> > > > > > > > > > <positions:ProfitColumn id="Profit" > > > > > > > > > headerText="Profit"/> > > > > > > > > > > > > > > > > > > <mx:Script> > > > > > > > > > <![CDATA[ > > > > > > > > > import mx.collections.ArrayCollection; > > > > > > > > > import com.steury.baseClasses.*; > > > > > > > > > import mx.core.Application; > > > > > > > > > import mx.controls.dataGridClasses.DataGridListData; > > > > > > > > > import flash.events.Event; > > > > > > > > > import mx.core.ClassFactory; > > > > > > > > > import com.steury.controls.positions.*; > > > > > > > > > import mx.controls.dataGridClasses.DataGridColumn; > > > > > > > > > import mx.controls.DataGrid; > > > > > > > > > > > > > > > > > > private function initTA():String { > > > > > > > > > if > > > > > > > > > (value[Kind.dataField]=="LONG")Profit.dataField="Profit"; > > > > > > > > > if > > > > > > > > > (value[Kind.dataField]=="SHORT")Profit.dataField="ShProfit"; > > > > > > > > > Profit.itemRenderer=new > > > > > > > > > ClassFactory(com.steury.baseClasses.CellFieldInt); > > > > > > > > > return myDec.format(Profit)+"%"; > > > > > > > > > } > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > --- In flexcoders@yahoogroups.com, "Craig" <craigj@> wrote: > > > > > > > > > > > > > > > > > > > > I am trying to access the value of a DataGridColumn and > > > > > > > > > > change the > > > > > > > > > > DataField for another column based on this value... > > > > > > > > > > Here is my code: > > > > > > > > > > > > > > > > > > > > <?xml version="1.0" encoding="utf-8"?> > > > > > > > > > > <mx:DataGrid xmlns:mx="http://www.adobe.com/2006/mxml" > > > > > > > > > > creationComplete="getDp()" > > > > > > > > > > > > > > > > > > > > > ... Datagrid> > > > > > > > > > > <mx:columns> > > > > > > > > > > <mx:DataGridColumn dataField="Ticker" > > > > > > > > > > headerText="Ticker"/> > > > > > > > > > > <mx:DataGridColumn id="Kind" > > > > > > > > > > dataField="Kind" > > > > > > > > > > itemRenderer="com.steury.baseClasses.CellFieldTrd" /> > > > > > > > > > > <mx:DataGridColumn id="Profit" > > > > > > > > > > headerText="Profit"/> > > > > > > > > > > > > > > > > > > > > ActionScript: > > > > > > > > > > > > > > > > > > > > private function getDp():void { > > > > > > > > > > > > > > > > > > > if(Application.application.CnvPos.dgOrdExt.selectedItem.Kind=="LONG")Pro\ > > > > > > > > > \ > > > > > > > > > > > > > > > > > > > fit.dataField="Profit";Application.application.CnvPos.dgOrdExt.refresh()\ > > > > > > > > > \ > > > > > > > > > > ; > > > > > > > > > > } > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > //This code works find if I use > > > > > > > > > > > > > > > > > > > > if(Kind.DataField="Kind")Profit.dataField="Profit"; > > > > > > > > > > > > > > > > > > > > //above to test the rest of the code. > > > > > > > > > > > > > > > > > > > > I can not figure out how to access the value of the > > > > > > > > > > Datagridcolumn. I > > > > > > > > > > have tied using event listeners, etc.. which did not work. > > > > > > > > > > Please let > > > > > > > > > > me know if anyone can help this fairly simple dilemma. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >