asp.net-mvc - Asp.Net MVC 4 模型

Question

你好 friend ，我在 mvc 4 中遇到问题，无法在 View 中发送动态模型建议我如何将动态模型与 View 绑定(bind)

这是我的 Action

[ChildActionOnly]

    public ActionResult TopArticles()
    {
        var model = from a in db.Articles.Take(3).OrderBy(m=>m.TotalViews) 
                    join u in db.UserProfiles 
                        on a.CreatedBy equals u.ID 
                    join t in db.Tags 
                        on a.TagID equals t.ID 
                    select new 
                    { 
                        Title = a.Title,
                       ArticleID = a.ArticleID, 
                        FirstName = u.FirstName, 
                        CreatedBy = a.CreatedBy, 
                        TagID = a.TagID, 
                        TagName = t.Name, 
                        CreationDate = a.CreationDate, 
                        TotalViews = a.TotalViews 
                    };  // get Top 3 Articles from Articles
        return PartialView(model);
    }

这是我的观点

 @model IEnumerable<dynamic>
@{
    ViewBag.Title = "TopArticles";   
}
@foreach(dynamic item in Model)
{
   <div class="row about_topviewedarticle1">
   <div class="row">
     <div class="columns twenty">
     <a href="#" class="title">@item.Title</a>
by   <a href="#"class="profilefont_eleven">@item.FirstName</a>
                    </div>
                </div>
                <div class="row">
                    <div class="columns twenty">
                        <label class="font_ten">views: @item.TotalViews  posted on : @item.CreationDate</label>
                    </div>
                </div>
            </div>
            }

当我运行这段代码时，出现以下错误

'object' does not contain a definition for 'Title'

Answer 1

第一种方式

试试这个

var model = from a in db.Articles.Take(3).OrderBy(m=>m.TotalViews) 
                    join u in db.UserProfiles 
                        on a.CreatedBy equals u.ID 
                    join t in db.Tags 
                        on a.TagID equals t.ID 
                    **select new Article**
                    { 
                        Title = a.Title,
                       ArticleID = a.ArticleID, 
                        FirstName = u.FirstName, 
                        CreatedBy = a.CreatedBy, 
                        TagID = a.TagID, 
                        TagName = t.Name, 
                        CreationDate = a.CreationDate, 
                        TotalViews = a.TotalViews 
                    };

According to David Ebbo, you can't pass an anonymous type into a dynamically-typed view because the anonymous types are compiled as internal. Since the CSHTML view is compiled into a separate assembly, it can't access the anonymous type's properties.

See this discussion

或者，

第二种方式

立即将匿名对象转换为 ExpandoObject。

public static ExpandoObject ToExpando(this object anonymousObject)
{
    IDictionary<string, object> anonymousDictionary =  new RouteValueDictionary(anonymousObject);
    IDictionary<string, object> expando = new ExpandoObject();
    foreach (var item in anonymousDictionary)
        expando.Add(item);
    return (ExpandoObject)expando;
}



 var model = from a in db.Articles.Take(3).OrderBy(m=>m.TotalViews) 
                        join u in db.UserProfiles 
                            on a.CreatedBy equals u.ID 
                        join t in db.Tags 
                            on a.TagID equals t.ID 
                      select new 
                        { 
                            Title = a.Title,
                           ArticleID = a.ArticleID, 
                            FirstName = u.FirstName, 
                            CreatedBy = a.CreatedBy, 
                            TagID = a.TagID, 
                            TagName = t.Name, 
                            CreationDate = a.CreationDate, 
                            TotalViews = a.TotalViews 
                        }**.ToExpando()**;

引用自 here和 here