在datagrid有的aspx中加事件:
<asp:DataGrid ...OnItemDataBound="Grid_ItemDataBound"../>
在cs文件代码中
public void Grid_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{


if (e.Item.ItemIndex!=-1)
{

e.Item.Attributes.Add("onMouseOver","className='cssTdBg1'");

e.Item.Attributes.Add("onMouseOut","className='cssORow'");
}
}