C#如何让GridView内某行数据根据条件变色(WEB FORM)

下列代码使GridView中title_id列值为 "PC8888"的行变成黄色

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        string str = Convert.ToString(DataBinder.Eval(e.Row.DataItem, "title_id"));
        if (str == "PC8888")
            e.Row.BackColor = System.Drawing.Color.Yellow;
    }