急急急！！关于单据体某行字段锁定

DynamicObject newRows = entitys.DynamicObjectType.CreateInstance() as DynamicObject;

newRows["FTask_id"] = Convert.ToInt64(data[i]["FPROCESSID"]);
newRows["FPROCESSDESCRIPTION"] = Convert.ToString(data[i]["FOperDescription"]);
newRows["FROUTINGIDISNS"] = Convert.ToInt64(data[i]["FSubEntity_FDETAILID"]);
newRows["FUnit_id"] = Convert.ToInt64(data[i]["FOperUnitID"]);
newRows["FAmount"] = Convert.ToInt64(count) * Convert.ToInt64(data[i]["FUNITTRANSHEADQTY"]) * Convert.ToInt64(data[i]["FUNITTRANSOPERQTY"]);
newRows["seq"] = indexs;
if (Convert.ToInt64(newRows["id"]) == 0)
{
this.View.StyleManager.SetEnabled("FTASK", newRows, null, false);
}
为什么锁定没有效果呢。[/i][/i][/i][/i][/i][/i]