gridview,datagrid 表头背景

private void DataGrid1_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
...{
    if(e.Item.ItemType == System.Web.UI.WebControls.ListItemType.Header)
    ...{
        e.Item.Attributes.Add("style", "background-image:url('background.gif')");
    }
}

GridView：
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
...{
    if (e.Row.RowType == DataControlRowType.Header)
    ...{
        e.Row.Attributes.Add("style", "background-image:url('background.gif')");
    }
}