怎样删除单据体的不符合条件的行

public override void BarItemClick(BarItemClickEventArgs e)
{
base.BarItemClick(e);
Entity entitys = this.View.BillBusinessInfo.GetEntity("FEntity");
DynamicObjectCollection cons = entitys.DynamicProperty.GetValue(this.Model.DataObject) as DynamicObjectCollection;
if (e.BarItemKey=="tbSave" || e.BarItemKey=="tbSplitSave")
{
for (int j =0 ; j < cons.Count; j++)
{
if (this.View.Model.GetValue("FRealQty",j).ToString() == "0")
{
this.View.Model.DeleteEntryRow("FEntity", j);
}
}
}
}

当点击销售出库单保存按钮时，删除实发数量为空的行，
怎么一次删除不完呢

循环不对啊，请老师指点一下，谢谢！