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POAdvanceddatagrid becomes empty while hiding the columns in the visible area
 

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    <p>We are developing an advanceddatagrid in flex 3 such that the columns in that datagrid can be hidden when a particular state is called.</p> <p>While doing a sample we faced an issue that, we have certain columns in our datagrid, and we scrolled to last column ,and then now we are hiding the all the columns which are in the visible area. After this , all columns are disappeared. here i have attached the snapshots.<img src="https://i.stack.imgur.com/fHBKU.png" alt="Datagrid at initial stage"></p> <p>After clicking the Hide columns button , the advanceddatagrid becomes <img src="https://i.stack.imgur.com/sMWi5.png" alt="enter image description here"></p> <p>Please help me on this issue.</p> <p>Note: we have tried by using validateNow() while hiding each column. but that created a lot of preoblem with our item editors.</p> <p>My sample code snippet:</p> <pre><code>protected function button1_clickHandler(event:MouseEvent):void { myADG.columns[7].visible = false; myADG.columns[8].visible = false; myADG.columns[9].visible = false; myADG.columns[10].visible = false; } </code></pre> <p>My Sample Code:</p> <pre><code> &lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" minWidth="955" minHeight="600"&gt; &lt;mx:Script&gt; &lt;![CDATA[ import mx.collections.ArrayCollection; import mx.controls.Alert; import mx.core.mx_internal; use namespace mx_internal; [Bindable] private var dpFlat:ArrayCollection = new ArrayCollection([ {Region:"Southwest", Territory:"Arizona", Territory_Rep:"Barbara Jennings", Actual:38865, Estimate:40000}, {Region:"Southwest", Territory:"Arizona", Territory_Rep:"Dana Binn", Actual:29885, Estimate:30000}, {Region:"Southwest", Territory:"Central California", Territory_Rep:"Joe Smith", Actual:29134, Estimate:30000}, {Region:"Southwest", Territory:"Nevada", Territory_Rep:"Bethany Pittman", Actual:52888, Estimate:45000}, {Region:"Southwest", Territory:"Northern California", Territory_Rep:"Lauren Ipsum", Actual:38805, Estimate:40000}, {Region:"Southwest", Territory:"Northern California", Territory_Rep:"T.R. Smith", Actual:55498, Estimate:40000}, {Region:"Southwest", Territory:"Southern California", Territory_Rep:"Alice Treu", Actual:44985, Estimate:45000}, {Region:"Southwest", Territory:"Southern California", Territory_Rep:"Jane Grove", Actual:44913, Estimate:45000} ]); protected function button1_clickHandler(event:MouseEvent):void { myADG.columns[7].visible = false; myADG.columns[8].visible = false; myADG.columns[9].visible = false; myADG.columns[10].visible = false; } ]]&gt; &lt;/mx:Script&gt; &lt;mx:Panel title="AdvancedDataGrid Control Example" height="75%" width="75%" layout="horizontal" paddingTop="10" paddingBottom="10" paddingLeft="10" paddingRight="10"&gt; &lt;mx:AdvancedDataGrid id="myADG" width="50%" height="60%" dataProvider="{dpFlat}" horizontalScrollPolicy="on" &gt; &lt;mx:columns&gt; &lt;mx:AdvancedDataGridColumn dataField="Region" width="100" headerText="1"/&gt; &lt;mx:AdvancedDataGridColumn dataField="Territory" width="100" headerText="2" visible="true"/&gt; &lt;mx:AdvancedDataGridColumn dataField="Territory_Rep" headerText="3" width="100" visible="true"/&gt; &lt;mx:AdvancedDataGridColumn dataField="Actual" width="100" headerText="4" visible="true"/&gt; &lt;mx:AdvancedDataGridColumn dataField="Estimate" width="100" headerText="5" visible="true"/&gt; &lt;mx:AdvancedDataGridColumn dataField="Territory_Rep" headerText="6" width="100" visible="true"/&gt; &lt;mx:AdvancedDataGridColumn dataField="Actual" width="100" headerText="7"/&gt; &lt;mx:AdvancedDataGridColumn dataField="Estimate" width="100" headerText="8"/&gt; &lt;mx:AdvancedDataGridColumn dataField="Territory_Rep" headerText="9" width="100"/&gt; &lt;mx:AdvancedDataGridColumn dataField="Actual" width="100" headerText="10"/&gt; &lt;mx:AdvancedDataGridColumn dataField="Estimate" width="100" headerText="11"/&gt; &lt;/mx:columns&gt; &lt;/mx:AdvancedDataGrid&gt; &lt;mx:Button label="Hide Columns" click="button1_clickHandler(event)" /&gt; &lt;/mx:Panel&gt; &lt;/mx:Application&gt; </code></pre>
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    1. COI don't know if I am understanding you correctly, are you trying to hide columns that are currently in view, all columns or column headers or what?
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      1. USPete TNT
    2. COI added the sample code snippet. i hide the columns which are in view(by keeping horizontal scroll position at last).
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    3. COWhat does tracing the dataProvider say after you have hidden the columns? Have you tried also using invalidateDisplayList()-method after hiding them?
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      1. USPete TNT
 

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