how to include selectall checkbox and selectall funtionality to existing combobox in ext.net 3.0

[Kasani007]

How Can I Implement A MultiComboBox With SelectAll Checkbox On The Top OF The List Of MultiCombo Checkboxes Items, Which are From Store In Ext.NET 3.0

[sateeshdasarikapil]

Hi dear,
If you are binding the data from the database through store, just add record as 'select all' to that store.
else do the following...

<listeners>
<BeforeExpand handler="addSelectAll(this);" />
</listeners>

<script>
var addSelectAll=function(control)
{
       if(control.getStore().getAt(0).get('DataIndexOfValueField')!=0)
      {
             control.getStore().insertRecord(0,{DataindexofDisaplayField:'Select All',DataIndexOfValueField:0});  
      }
}
</script>

[Kasani007]

hi Sateesh,

I Had used your code, it is showing that BeforeExpand Is Not Supported For This Listener and also if i changed the BeforeExpand To BeforeRender then it is not showing blank page.

please can you give me some more that works for me.

thank you