The “Copy this Cell” option will only appear in WebGrid’s context menu when a cell is selected.

Your scenario can be achieved by following the steps mentioned below.

1. On each column of WebGrid, set the value of EditType property to NoEdit. WebGrid will becomes read-only.
2. In LayoutSettings, set the value of CellClickAction property to CellSelect.

For example:

<ISWebGrid:WebGrid ID="WebGrid1" runat="server" DataSourceID="AccessDataSource1"
    Height="250px" UseDefaultStyle="True" Width="500px">
    <LayoutSettings CellClickAction="CellSelect">
    </LayoutSettings>
    <RootTable DataKeyField="ShipperID">
        <Columns>
            <ISWebGrid:WebGridColumn Caption="ShipperID" DataMember="ShipperID"
                DataType="System.Int32" Name="ShipperID" Width="100px" EditType="NoEdit">
            </ISWebGrid:WebGridColumn>
            <ISWebGrid:WebGridColumn Caption="CompanyName" DataMember="CompanyName"
                Name="CompanyName" Width="100px" EditType="NoEdit">
            </ISWebGrid:WebGridColumn>
            <ISWebGrid:WebGridColumn Caption="Phone" DataMember="Phone" Name="Phone"
                Width="100px" EditType="NoEdit">
            </ISWebGrid:WebGridColumn>
        </Columns>
    </RootTable>
</ISWebGrid:WebGrid>

Hope this helps.

Hello,

To get "Copy this Cell" menu, you should need to set "Allow Edit" yes.
However, if you still want to set Read-only into your WebGrid, you would need to add Edit Type properties to No Edit in each of your WebGridColumn.

Regards,
Handy