GridView模板列DropDownList当前行索引

 protected void DDLAnnex_SelectedIndexChanged(object sender, EventArgs e)
    {
        DropDownList drp = sender as DropDownList; // 触发事件的 DropDownList
        GridViewRow row = drp.NamingContainer as GridViewRow; // GridView 当前行        
        row.Style.Add(HtmlTextWriterStyle.BackgroundColor, drp.SelectedValue);
        int CurRow = row.RowIndex;
    }