GridView中如何自动换行

protected void gvMessage_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        //word-break:break-all;
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            for (int i = 0; i < e.Row.Cells.Count; i++)
            {
                e.Row.Cells[i].Attributes.Add("Style", "word-break:break-all;");
            }
        }

    }