Stronglytyped HTML辅助与GET和POST不同型号 [英] Stronglytyped html helper with different model for get and post

问题描述

如果一个获取操作返回一个汽车模型视图。视图从对象显示的信息，并采取输入到表格内张贴到另一个动作是一个类型的对象付款

If a Get Action returns a View with a "Car" model. The view displays info from the object and takes input to post within a form to another action that takes an object of type "Payment"

在视图的模型是类型的车，给我stronglytyped HTML支持和其他一些功能，如displaytext。但对于我张贴有像文本框不支持的HtmlHelper（X => x.amount我需要像@ Html.TextBox（数量......
其可能的，但是这是唯一的选择？

The Model on the view is of type Car and gives me stronglytyped html support and some other features like displaytext. But for posting I there is no Htmlhelper support like TextBox(x => x.amount I need to make it like @Html.TextBox("Amount"... Its possible, but is this the only option?

推荐答案

您可以这样做：

@{
var paymentHtml = Html.HtmlHelperFor<Payment>();
}

@paymentHtml.EditorFor(p => p.Amount)

此扩展方法：

public static class HtmlHelperFactoryExtensions {

   public static HtmlHelper<TModel> HtmlHelperFor<TModel>(this HtmlHelper htmlHelper) {
      return HtmlHelperFor(htmlHelper, default(TModel));
   }

   public static HtmlHelper<TModel> HtmlHelperFor<TModel>(this HtmlHelper htmlHelper, TModel model) {
      return HtmlHelperFor(htmlHelper, model, null);
   }

   public static HtmlHelper<TModel> HtmlHelperFor<TModel>(this HtmlHelper htmlHelper, TModel model, string htmlFieldPrefix) {

      var viewDataContainer = CreateViewDataContainer(htmlHelper.ViewData, model);

      TemplateInfo templateInfo = viewDataContainer.ViewData.TemplateInfo;

      if (!String.IsNullOrEmpty(htmlFieldPrefix))
         templateInfo.HtmlFieldPrefix = templateInfo.GetFullHtmlFieldName(htmlFieldPrefix);

      ViewContext viewContext = htmlHelper.ViewContext;
      ViewContext newViewContext = new ViewContext(viewContext.Controller.ControllerContext, viewContext.View, viewDataContainer.ViewData, viewContext.TempData, viewContext.Writer);

      return new HtmlHelper<TModel>(newViewContext, viewDataContainer, htmlHelper.RouteCollection);
   }

   static IViewDataContainer CreateViewDataContainer(ViewDataDictionary viewData, object model) {

      var newViewData = new ViewDataDictionary(viewData) {
         Model = model
      };

      newViewData.TemplateInfo = new TemplateInfo { 
         HtmlFieldPrefix = newViewData.TemplateInfo.HtmlFieldPrefix 
      };

      return new ViewDataContainer {
         ViewData = newViewData
      };
   }

   class ViewDataContainer : IViewDataContainer {

      public ViewDataDictionary ViewData { get; set; }
   }
}

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