How to Hide & Show a CommandColumn in a Grid ??

[RonaldR]

I have the Client & Admin, I ONLY want to show the Command Column base on their Windows NT login.

How would I go about doing that, because there is no ID or runat="server" on the "CommandColumn" ??

        <ext:GridPanel ID="GridPanelPlants" runat="server" StripeRows="true" Title="Existing Plants"
            TrackMouseOver="true" Icon="BuildingGo" Height="140" Width="575" AutoExpandColumn="PlantName"
            StyleSpec="margin-left: 20px; margin-top: 20px;">
            <Store>
                <ext:Store ID="StorePlant" runat="server" AutoLoad="true" AutoDataBind="true">
                    <Reader>
                        <ext:JsonReader Root="plants" IDProperty="PlantCode">
                            <Fields>
                                <ext:RecordField Name="PlantCode" Type="String" />
                                <ext:RecordField Name="PlantName" Type="String" />
                                <ext:RecordField Name="DateStartRun" Type="Date" />
                                <ext:RecordField Name="DateEndRun" Type="String" />
                                <ext:RecordField Name="IsActive" Type="Boolean" />
                            </Fields>
                        </ext:JsonReader>
                    </Reader>
                    <SortInfo Field="PlantCode" Direction="ASC" />
                </ext:Store>
            </Store>
            <ColumnModel ID="ColumnModel1" runat="server">
                <Columns>
                    <ext:Column ColumnID="PlantCode" Header="Plant Code" DataIndex="PlantCode" />
                    <ext:Column Header="Plant Name" DataIndex="PlantName" />
                    <ext:DateColumn Header="Start Date" DataIndex="DateStartRun" Format="MM-dd-yyyy" />
                    <ext:DateColumn Header="End Date" DataIndex="DateEndRun" Format="MM-dd-yyyy" />
                    <ext:Column Header="Is Active" DataIndex="IsActive">
                        <Renderer Fn="formatStatus" />
                    </ext:Column>
                    <ext:CommandColumn Width="30">
                        <PrepareToolbar Fn="prepareToolbar" />
                    </ext:CommandColumn>
                </Columns>
            </ColumnModel>
            <SelectionModel>
                <ext:RowSelectionModel ID="RowSelectionModel1" runat="server" SingleSelect="true" />
            </SelectionModel>
            <Listeners>
                <Command Fn="commandHandler" />    
            </Listeners>
            <LoadMask ShowMask="true" />
        </ext:GridPanel>

[RonaldR]

if (Session["IsAdmin"].ToString().AsBool())
GridPanelPlants.ColumnModel.Columns[5].Hidden = true;