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AdvancedDataGrid: Adventures in binding

18 Sep

Quick post on AdvancedDataGrid dataProviders.

If your using a HierarchicalData provider for you AdvancedDataGrid (Flex) binding changes may (will) not be picked up by the AdvancedDataGrid.

For example


<mx:AdvancedDataGrid id="grid" bottom="10" top="40" left="10"
designViewDataType="tree" width="379">
<mx:dataProvider>
<mx:HierarchicalData source="{grades}"
childrenField="assignments"/>
</mx:dataProvider>
<mx:columns>
<mx:AdvancedDataGridColumn headerText="Course" dataField="title"/>
<mx:AdvancedDataGridColumn headerText="Score" dataField="scoreString" width="80"/>
</mx:columns>
</mx:AdvancedDataGrid>

Won’t pickup the update to ‘grades’. Instead you’ll need to update the dataProvider itself…


var hd:HierarchicalData = new HierarchicalData();
hd.childrenField = "assignments";
hd.source = grades;
grid.dataProvider = hd;

 
4 Comments

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  1. Salman

    September 19, 2008 at 8:06 am

    How about:

    grid.dataProvider.refresh();

    You could possibly take it further and try something like:

    BindSetter( function( obj:Object ):void { grid.dataProvider.refresh(); }, yourObject, “grades” );

    Reply
     

  2. Joshua

    September 19, 2008 at 4:16 pm

    Salman,
    Thanks for the reply.

    No, with a HierarchicalData dataProvider neither

    grid.dataProvider.refresh();

    nor

    BindingUtils.bindSetter(function( obj:Object ):void { grid.dataProvider.refresh(); }, this, “grades”);

    will solve the issue.

    You can find more details @ http://bugs.adobe.com/jira/browse/FLEXDMV-1334?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

    Reply
     

  3. mani

    October 13, 2008 at 9:42 pm

    Joshua, thanks for the article!

    By the way, could you opensource the DynamicModules which in the follow source page?
    It is wonderful, and could help me a lot.

    http://www.joshuaostrom.com/demos/mortgagepipes/srcview/index.html

    Thanks~~

    Reply
     

  4. Kazi

    November 15, 2008 at 5:26 pm

    Thanks Joshua,

    this really helped me!!!

    Reply