你可以用这个MVC视图模型问题帮助吗？ [英] Can you help with this MVC ViewModel issue?

问题描述

我有，我只是似乎无法来解决MVC视图的一个问题。这就是。

1）我有一个显示零售商从零售商表数据的列​​表的索引图。到目前为止好。

2）我还希望包括零售商类别被存储在一个RetailersCategories表，其中每个零售商可以有多个类别的每个零售商

我已经尝试了一些事情，但似乎无法使这项工作。最近我来到了我想要的是使用视图模型。我已经包括下面的code。

我真正得到正确的数据回来，但我得到的所有的零售商记录，然后所有的类别记录。

我需要的是一个零售商在记录与所有涉及到的零售商类别的时间。

谁能告诉我我怎么能做到这一点？

  //控制器公众的ActionResult指数（INT？页，诠释国家）
{
    VAR可视数据=新retailersIndexViewModel（_retailerRepository.GetAllRetailersByCountry（国家），_retailerRepository.GetRetailerCategories（））;
    返回视图（可视数据）;
}//视图模型公共类RetailersIndexViewModel
{
    公共IEnumerable的＆LT; RetailersShipping＆GT; RetailerShipping {搞定;组; }
    公共IEnumerable的＆LT; RetailersCategory＆GT; RetailerCategories {搞定;组; }    公共RetailersIndexViewModel（IEnumerable的＆LT; RetailersShipping＆GT;零售商的IEnumerable＆LT; RetailersCategory＆GT; retailercategory）
    {
        this.RetailerShipping =零售商;
        this.RetailerCategories = retailercategory;
    }
}
// IndexView＆LT;％@页面语言=C＃的MasterPageFile =〜/查看/共享/ Inner.Master继承=System.Web.Mvc.ViewPage＆LT; RetailersIndexViewModel＆gt;中％GT;＆LT;％Html.RenderPartial（RetailerSummaryPartial，this.ViewData.Model.RetailerShipping）; ％GT;
＆LT; D​​IV ID =retailer_index_categories＆GT;＆LT;％
    的foreach（在ViewData.Model.RetailerCategories RetailersCategory类）
    {％GT;
        ＆LT;％Html.RenderPartial（RetailerCategoryPartial类）; ％GT;
    ＆LT;％}％GT;
// RetailerSummaryPartial＆LT;％@控制语言=C＃继承=System.Web.Mvc.ViewUserControl＆LT;＆IEnumerable的LT; RetailersShipping＆GT;＆gt;中％GT;＆LT; D​​IV ID =retailer_partial_summary＆GT;
＆LT;％的foreach（在VAR模型零售商）
{％GT;
    ＆LT; D​​IV ID =retailer_index_image＆GT;
        ＆LT; IMG SRC =＆LT;％= Html.En code（retailer.Retailer.Country.Image）％GT;标题=＆LT;％= Html.En code（retailer.Retailer.Name）％GT;＆gt;中ALT =＆LT;％= Html.En code（retailer.Retailer.Name）％GT;类=主图像/＆GT;
        ＆LT; BR /＆GT;
    ＆LT; / DIV＆GT;
    ＆LT; D​​IV ID =retailer_index_logo＆GT;
        ＆LT; IMG SRC =＆LT;％= Html.En code（retailer.Retailer.Logo）％GT;标题=＆LT;％= Html.En code（retailer.Retailer.Name）％GT;＆gt;中ALT =＆LT;％= Html.En code（retailer.Retailer.Name）％GT;类=主图像/＆GT;
    ＆LT; / DIV＆GT;
    ＆LT; D​​IV ID =retailer_index_name_comment＆GT;
        ＆LT;％= Html.En code（retailer.Retailer.Name）％GT;＆LT; BR /＆GT;
        ＆LT;跨度＆GT;＆LT;％，如果（retailer.Retailer.CountryId == retailer.Retailer.CountryId）％GT;
                ＆LT;％= Html.En code（retailer.Retailer.LocalComment）％GT;
                ＆LT;％= Html.En code（retailer.Retailer.IntComment）％GT;
        ＆LT; / SPAN＆GT;
    ＆LT; / DIV＆GT;＆LT;％}％GT;
＆LT; / DIV＆GT;
// RetailerCategoryPartial＆LT;％@控制语言=C＃继承=System.Web.Mvc.ViewUserControl＆LT; RetailersCategory＆gt;中％GT;
＆LT; D​​IV ID =retailer_index_categories＆GT;
    ＆LT;％= Html.En code（Model.Category.CategoryName）％GT;
＆LT; / DIV＆GT;
 

解决方案

我要重构你的视图模型。如果你打算重新$ P $集合这是内psenting集合最适​​合您的视图模型反映这一点。

 公共类RetailersIndexViewModel {    公共IEnumerable的＆LT; RetailersShippingViewModel＆GT; RetailerShippings {搞定;组; }    公共RetailersIndexViewModel（IEnumerable的＆LT; RetailersShipping＆GT;运送）
    {
        this.RetailerShippings =航运;
        的foreach（在运送VAR运费）
        {
            shipping.RetailerCategories = shipping.Categories //假设关键字在你的零售商航运类被引用;
        }
    }
}公共类RetailerShippingViewModel {    公共IEnumerable的＆LT; RetailersCategory＆GT; RetailerCategories {搞定;组; }    公共RetailersIndexViewModel（IEnumerable的＆LT; RetailersCategory＆GT; retailercategories）
    {
        this.RetailerCategories = retailercategories;
    }
}
 

和使它像这样

 ＆LT;％@页面语言=C＃的MasterPageFile =〜/查看/共享/ Inner.Master继承=System.Web.Mvc.ViewPage＆LT; RetailersIndexViewModel＆gt;中％GT;   ＆LT;％的foreach（在Model.RetailerShippings VAR运费）
      {
          Html.RenderPartial（RetailerSummaryPartial，发货）;
      }％GT;
 

在您的RetailerSummaryPartial称之为而不是索引视图的

 ＆LT;％
    的foreach（在ViewData.Model.RetailerCategories VAR类）
       {％GT;
    ＆LT;％Html.RenderPartial（RetailerCategoryPartial类）; ％GT;
    ＆LT;％}％GT;
 

I have a problem with an MVC view that I just cannot seem to solve. Here it is.

1) I have an index view that displays a list of retailers with data from the retailers table. So far so good.

2) I also want to include the retailer categories for each retailer which are stored in a RetailersCategories table where each retailer can have multiple categories

I have tried a few things but cannot seem to make this work. The closest I came to what I wanted was using a view model. I have included the code below.

I actually get the right data back but I get all of the retailer records and then all of the category records.

What I need is one retailer record at a time with all of the categories that relate to that retailer.

Can anyone show me how I can achieve this?

//Controller   

public ActionResult Index(int? page, int country)
{
    var viewdata = new retailersIndexViewModel(_retailerRepository.GetAllRetailersByCountry(country),  _retailerRepository.GetRetailerCategories());
    return View(viewdata);       
}

// ViewModel

public class RetailersIndexViewModel
{        
    public IEnumerable<RetailersShipping> RetailerShipping { get; set; }
    public IEnumerable<RetailersCategory> RetailerCategories { get; set; }

    public RetailersIndexViewModel(IEnumerable<RetailersShipping> retailer, IEnumerable<RetailersCategory> retailercategory)
    {
        this.RetailerShipping = retailer;
        this.RetailerCategories = retailercategory;
    }
}


//IndexView

<%@ Page Language="C#" MasterPageFile="~/Views/Shared/Inner.Master" Inherits="System.Web.Mvc.ViewPage<RetailersIndexViewModel>" %>

<% Html.RenderPartial("RetailerSummaryPartial", this.ViewData.Model.RetailerShipping); %>
<div id="retailer_index_categories">

<%
    foreach (RetailersCategory category in ViewData.Model.RetailerCategories) 
    {%>
        <% Html.RenderPartial("RetailerCategoryPartial", category); %>
    <% } %>


// RetailerSummaryPartial

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<IEnumerable<RetailersShipping>>" %>

<div id="retailer_partial_summary">
<% foreach (var retailer in Model)
{ %>
    <div id="retailer_index_image">
        <img src="<%=Html.Encode(retailer.Retailer.Country.Image) %>" title="<%= Html.Encode(retailer.Retailer.Name) %>>" alt="<%= Html.Encode(retailer.Retailer.Name) %>" class="main-image" />
        <br />
    </div>
    <div id="retailer_index_logo">
        <img src="<%=Html.Encode(retailer.Retailer.Logo) %>" title="<%= Html.Encode(retailer.Retailer.Name) %>>" alt="<%= Html.Encode(retailer.Retailer.Name) %>" class="main-image" />
    </div>
    <div id="retailer_index_name_comment">
        <%= Html.Encode(retailer.Retailer.Name)%><br />
        <span><%if (retailer.Retailer.CountryId == retailer.Retailer.CountryId) %>
                <%= Html.Encode(retailer.Retailer.LocalComment)%>
                <%= Html.Encode(retailer.Retailer.IntComment)%>
        </span>
    </div>

<% } %>
</div>


//RetailerCategoryPartial

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<RetailersCategory>" %>
<div id="retailer_index_categories">
    <%= Html.Encode(Model.Category.CategoryName) %>
</div>

解决方案

I'd refactor your view models. If you're going to be representing a collection within a collection it's best your view models reflect that.

public class RetailersIndexViewModel {

    public IEnumerable<RetailersShippingViewModel> RetailerShippings { get; set; }

    public RetailersIndexViewModel(IEnumerable<RetailersShipping> shippings)
    {
        this.RetailerShippings = shipping;
        foreach( var shipping in shippings)
        {
            shipping.RetailerCategories = shipping.Categories // assuming Categories is referenced in your Retailer Shipping class;
        }
    }
}

public class RetailerShippingViewModel {

    public IEnumerable<RetailersCategory> RetailerCategories { get; set; }

    public RetailersIndexViewModel(IEnumerable<RetailersCategory> retailercategories)
    {
        this.RetailerCategories = retailercategories;
    }
}

and render it like so

<%@ Page Language="C#" MasterPageFile="~/Views/Shared/Inner.Master" Inherits="System.Web.Mvc.ViewPage<RetailersIndexViewModel>" %>

   <% foreach(var shipping in Model.RetailerShippings)
      {
          Html.RenderPartial("RetailerSummaryPartial", shipping); 
      }%>

call this in your RetailerSummaryPartial instead of the index view

<%
    foreach (var category in ViewData.Model.RetailerCategories) 
       {%>
    <% Html.RenderPartial("RetailerCategoryPartial", category); %>
    <% } %>

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