Hi, Dan,
The properties ItemStyle, SelectedItemStyle, AlternatingItemStyle,
EditItemStyle, HeaderStyle and FooterStyle expose an instance of type
TableItemStyle. Set the Wrap property on it to false to prevent wrapping.
i.e.
dataGrid1.ItemStyle.Wrap = false;
or
<asp:datagrid id="dataGrid1" runat="server"
itemstyle-wrap="false" .... />
Hope this helps
Martin