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我正在尝试使用 WebformsMVP 框架将 Webforms 应用程序重构为 Model-View-Presenter (MVP)。在创建演示者和调整视图代码时，我遇到了一个动态填充其某些子控件数据的视图。这是我正在处理的视图的非重构版本背后的代码：

[PresenterBinding(typeof(OrderDetailsPresenter))]
public partial class OrderDetails : AuthorizedPageBase<OrderDetailsPage>, IOrderDetails
{
    private PurchaseOrder _orderDetail;

    private int _orderGroupId;

    protected new void Page_Load(object sender, EventArgs e)
    {
        base.Page_Load(sender, e);

        _orderGroupId = string.IsNullOrEmpty(Request.QueryString["po"])
            ? _orderGroupId = 0
            : _orderGroupId = Int32.Parse(Request.QueryString["po"].ToString(CultureInfo.InvariantCulture));

        _orderDetail = OrderContext.Current.GetPurchaseOrder(SecurityContext.Current.CurrentContactId, _orderGroupId);

        if (_orderDetail == null)
            return;

        if (_orderDetail.OrderForms[0].Shipments.Count > 1)
        {
            var control = (OrderDetailsMultiShipment)LoadControl("~/Templates/Sample/Units/AccountManagement/OrderDetailsMultiShipment.ascx");
            control.OrderDetail = _orderDetail;
            modulePlaceHolder.Controls.Add(control);
        }
        else
        {
            var control = (OrderDetailsSingleShipment)LoadControl("~/Templates/Sample/Units/AccountManagement/OrderDetailsSingleShipment.ascx");
            control.OrderDetail = _orderDetail;
            modulePlaceHolder.Controls.Add(control);
        }

    }
}

如您所见，根据值，一个控件或另一个控件加载了多个信息。我的想法是：

  • 将 PurchaseOrder 属性移动到演示者
  • 尝试从 Page_Load 中移动尽可能多的逻辑
  • 将控件重构为普通且不填充任何 OrderDetail 属性（对我来说最令人困惑的问题）

我尝试了以下方法来解决这些问题（创建演示者填充数据的事件，然后由视图检查）：

[PresenterBinding(typeof(OrderDetailsPresenter))]
public partial class OrderDetails : AuthorizedPageBase<OrderDetailsPage>, IOrderDetails
{
    public event EventHandler<GetShipmentsArgs> GetShipments;

    protected new void Page_Load(object sender, EventArgs e)
    {
        base.Page_Load(sender, e);

        var args = new GetShipmentsArgs();
        GetShipments(this, args);

        if (args.Shipments.Count > 1)
        {
            var control = (OrderDetailsMultiShipment)LoadControl("~/Templates/Sample/Units/AccountManagement/OrderDetailsMultiShipment.ascx");
            control.OrderDetail = _orderDetail; //Here I duplicate the problem I tried to solve...
            modulePlaceHolder.Controls.Add(control);
        }
        else
        {
            var control = (OrderDetailsSingleShipment)LoadControl("~/Templates/Sample/Units/AccountManagement/OrderDetailsSingleShipment.ascx");
            control.OrderDetail = _orderDetail; //Here I duplicate the problem I tried to solve...
            modulePlaceHolder.Controls.Add(control);
        }
    }

是的，我知道我的代码无法编译，但我希望它能阐明我的想法。我的方法仍然有几个问题： - View 仍然有决定加载哪个控件的逻辑，并且必须加载要加载的控件的信息。

我考虑过一个演示者间通信系统，但我不确定它是否是最佳解决方案。在 MVP 范式上重构我的初始代码的最佳方式是什么？

谢谢

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