Thanks for your answer AgentD5.

Here is the code i'm using to hide the column:

<script type="text/javascript">

    function changeGroup(e, f) {

        var grid = $find("MyGrid");

        var parentGrid = grid.get_gridView();

        parentGrid.get_columns().get_columnFromKey(f.get_effectedColumn().get_columnKey()).set_hidden(hidden);

    }

</script>

I call this function on the GroupedColumnsChanging client method.

Thanks for your answers. The code you put worked perfectly.

I added some code for ungrouping because when you ungroup a column it continued hidden.

protected void WebHierarchicalDataGrid1_GroupedColumnsChanging(object sender, GroupedColumnsChangingEventArgs e)

        {

            if (e.Action == GroupByChangeAction.Ungroup)

                foreach (GroupedColumn col in e.EffectedColumns)

                    e.Band.Columns[col.ColumnKey].Hidden = false;

        }

I've found another issue with the grids. When order a grid by a column (clicking at the column header or by method) the width of the grid columns is not fixed to the width of the grid (i have columns with the width value defined and columns without it). It happens with the explorer 8. In the explorer 9 seems to be fixed.

The only solution i see is to set the width value for all the columns but i have another problem. When i group by a column the grid messes up.

I have another error when i try to group by a column with the behavior columnfixing and AutoAdjustCells set to true.

This is a javascript error at the _onHorizontalScrollBarWidthInit function. "Can't obtain the value of the property 'get_element': the object is null or undefined" and another at the _gridViewCreated function. "The object doesn't allows the property or method '_get_bandFromAdr' "

I'm using version 10.3.20103.2120

Hi,

Column Fixing is not supported in the WHDG at this point in time.  If you would like to see it so, please submit a feature request.

regards,
David Young 

Ok, thanks.