I think I understand why. The dataprovider in the example is the actual XML List. I was wrapping the XML List in an XML List Collection so it wasn't updating the underlying dataprovider.
--- In [email protected], "Tracy Spratt" <tr...@...> wrote: > > No, you maybe had something else going on. Here is an example based on the > example in the docs. > > > > <?xml version="1.0"?> > > <!-Editable DataGrid control example. --> > > <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"; > > > > > <mx:Panel title="DataGrid Control Example" height="100%" width="100%" > > paddingTop="10" paddingLeft="10" paddingRight="10"> > > > > <mx:Label width="100%" color="blue" > > text="Select a row in the DataGrid control."/> > > > > <mx:DataGrid id="dg" width="100%" height="100%" rowCount="5" > > dataProvider="{employees}" editable="true"> > > <mx:columns> > > <mx:DataGridColumn dataField="name" headerText="Name" > editable="true"/> > > <mx:DataGridColumn dataField="phone" headerText="Phone" > editable="true"/> > > <mx:DataGridColumn dataField="email" headerText="Email" > editable="true"/> > > </mx:columns> > > </mx:DataGrid> > > > > <mx:Button label="Show DataProvider" click="txtDP.text = > dg.dataProvider.toXMLString()" /> > > <mx:Text id="txtDP" width="100%" height="100%" /> > > </mx:Panel> > > > > <mx:XMLList id="employees"> > > <employee> > > <name>Christina Coenraets</name> > > <phone>555-219-2270</phone> > > <email>ccoenra...@...</email> > > <active>true</active> > > </employee> > > <employee> > > <name>Joanne Wall</name> > > <phone>555-219-2012</phone> > > <email>jw...@...</email> > > <active>true</active> > > </employee> > > <employee> > > <name>Maurice Smith</name> > > <phone>555-219-2012</phone> > > <email>maur...@...</email> > > <active>false</active> > > </employee> > > <employee> > > <name>Mary Jones</name> > > <phone>555-219-2000</phone> > > <email>mjo...@...</email> > > <active>true</active> > > </employee> > > </mx:XMLList> > > </mx:Application> > > > > > > Tracy Spratt, > > Lariat Services, development services available > > _____ > > From: [email protected] [mailto:[email protected]] On > Behalf Of valdhor > Sent: Friday, June 12, 2009 11:57 AM > To: [email protected] > Subject: [flexcoders] Re: ArrayCollection and Datagrid Binding and > DataProvider Question > > > > > > > > > I didn't know this. > > When I tried it, it didn't update the dataprovider. Is there anything > special that needs to happen. > > --- In flexcod...@yahoogro <mailto:flexcoders%40yahoogroups.com> ups.com, > "Tracy Spratt" <tracy@> wrote: > > > > Data binding in general is not two-way, but an editable datagrid is a > > special case. It will update the dataProvider items automatically. > > > > > > > > Tracy Spratt, > > > > Lariat Services, development services available > > > > _____ > > > > From: flexcod...@yahoogro <mailto:flexcoders%40yahoogroups.com> ups.com > [mailto:flexcod...@yahoogro <mailto:flexcoders%40yahoogroups.com> ups.com] > On > > Behalf Of valdhor > > Sent: Friday, June 12, 2009 9:42 AM > > To: flexcod...@yahoogro <mailto:flexcoders%40yahoogroups.com> ups.com > > Subject: [flexcoders] Re: ArrayCollection and Datagrid Binding and > > DataProvider Question > > > > > > > > > > > > > > > > > > Basically, no. The datagrid is like a window into your dataprovider. > > > > If you need to modify your dataprovider you need to listem for the > > itemEditEnd event, grab the data that was modified and update the > underlying > > dataprovider. > > > > The data binding will note that the dataprovider has changed and will > update > > the datagrid on the next redraw. > > > > What data binding does is add an event dispatcher to the variable you have > > defined as bindable. When the variable changes an event is generated to > let > > any component that is bound to that variable know that the variable has > > changed and update itself with the new data. > > > > Now, As I understand it (And I could be wrong) Flex 4 (Gumbo) does do full > > two way data binding. I have not read up on what or how it does this but > it > > sounds interesting. > > > > HTH > > > > Steve > > > > --- In flexcod...@yahoogro <mailto:flexcoders%40yahoogroups.com> ups.com, > > Angelo Anolin <angelo_anolin@> wrote: > > > > > > Good day. > > > > > > Learning Flex here for the past two (like three actually) weeks. Using > > only mxml compiler. > > > > > > I have a question with regards to the above subject: > > > > > > Assuming I declared an ArrayCollection as follows: > > > > > > [Bindable] private var _arrItems:ArrayCollection = new > > ArrayCollection([{"itemNo":"1", "testItem":"Angelo"}, {"itemNo":"2", > > "testItem":"Dinah"}]); > > > > > > This array I am binding to a datagrid as follows: > > > > > > <mx:DataGrid id="dgOutwardList" > > > dataProvider="{_arrItems}" > > > useRollOver="false" > > > height="450" > > > width="100%" > > > verticalScrollPolicy="auto" > > > sortableColumns="false" > > > draggableColumns="false" > > > resizableColumns="false"> > > > <mx:columns> > > > <mx:DataGridColumn headerText="" dataField="itemNo" width="20"/> > > > <mx:DataGridColumn headerText="Name of Passengers" dataField="testItem" > > width="200"> > > > <mx:itemRenderer> > > > <mx:Component> > > > <mx:TextInput width="100%" /> > > > </mx:Component> > > > </mx:itemRenderer> > > > </mx:DataGridColumn> > > > > > > </mx:columns> > > > </mx:DataGrid> > > > > > > No problem initially, as the itemNo and the testItem values are > displayed > > properly on the datagrid. > > > > > > Now for example, if I modified my first row which contains itemNo:1 and > > testItem:Angelo, where I changed Angelo to Mickey, will the dataprovider > > reflect the change in the said row? > > > How do I make so that the changes in the datagrid be reflected into the > > ArrayCollection? such that when I changed the testItem data for the first > > row and access the item, via: > > > > > > _arrItems.getItemAt(arrLength -1).itemNo > > > _arrItems.getItemAt(arrLength -1).testItem > > > > > > The result would be "1" and "Mickey" respectively? > > > > > > I am a bit puzzled on how databinding actually works in Flex. Is it like > a > > two-way live update (such that when you modify the value in the datagrid, > it > > is reflected back to the arraycollection)? > > > > > > Would love to hear your inputs. > > > > > > Thanks and regards, > > > Angelo > > > > > >
