get_dataItem() is null in OnRowSelecting()

[Jeff]

We need a grid in which the user can drag rows to reorder them, except for the first few rows, which must remain fixed.

I thought I'd figured out how to do this in OnRowSelecting, as described in this thread: http://www.telerik.com/community/forums/aspnet-ajax/grid/undraggable-rows.aspx

Unfortunately, that depends upon out setting Enabled=false in OnItemDataBound().  If the row is disabled, it can't be edited, and we need these rows to be editable, even if they can't be reordered.

I had thought that if I added a boolean column "isFixed" to the datasource, or a hidden GridBoundColumn to the grid, I'd be able to access one or the other in OnRowSelecting.

function onRowSelecting(sender, args) {
  var item = args.get_gridDataItem();
  var element = item.get_element();
  var dataItem = item.get_dataItem();
}

Unfortunately, element does not contain the hidden GridBoundColumn, so I can't access it.  And get_dataItem() returns null.

Looking through your examples, the only ones that show get get_dataItem() being called are in OnRowDataBound().

Is there some way to access the underlying row data in OnRowSelecting()?

[Shinu]

Hi Jeff,

Give a try with the following code snippet to get the cell value in the OnRowSelecting client event.

CS:

<script type="text/javascript" >
 function OnRowSelecting(sender, eventArgs)
 {
   var grid = sender;
   var MasterTable = grid.get_masterTableView();
   var row = MasterTable.get_dataItems()[eventArgs.get_itemIndexHierarchical()];
   var cell = MasterTable.getCellByColumnUniqueName(row, "ProductID");
   //here cell.innerHTML holds the value of the cell
   alert(cell.innerHTML)
 }
</script>

Regards
Shinu

[Jeff]

MasterTable.getCellByColumnUniqueName() returns null, when the column is not visible.

[Shinu]

Hi Jeff,

Try hiding the column using the Display property instead of Visible property and see whether you are able to get the cell value of the hidden column on the client side.

Thanks
Shinu

[Jeff]

That works, thanks.