MVC4局部视图错误＆QUOT;未将对象引用设置到对象的实例＆QUOT。 [英] MVC4 Partial View Error "Object reference not set to an instance of an object."

问题描述

我首先是在MVC一个完整的初学者。我怎么会是能够在局部视图中显示事件表数据库中的数据，如果某个布尔字段是真实的。

这是我的部分观点：

  @model IEnumerable的＆LT; TheBigEvent.Models.RecommendedEvents＆GT;
＆LT;表＆gt;
 ＆所述; TR＆GT;  ＆所述; TD＆GT;
     @ Html.DisplayNameFor（型号=＆GT; model.Event_Name）
      ＆LT; / TD＆GT;
      ＆所述; TD＆GT;
      @ Html.DisplayNameFor（型号=＆GT; model.Event_Date）   ＆LT; / TD＆GT;
  ＆LT; / TR＆GT; ＆所述; TR＆GT;      @foreach（以型号VAR项）{          ＆所述; TD＆GT;    @ Html.DisplayFor（modelItem =＆GT; item.Event_Name）
＆LT; / TD＆GT;
     ＆所述; TD＆GT;
    @ Html.DisplayFor（modelItem =＆GT; item.Event_Date）
         ＆LT; / TD＆GT;
     } ＆LT; / TR＆GT;
   ＆LT; /表＆gt;
 

这是我的控制器

 公众的ActionResult _RecommendedEvents（）    {
        从db.Database1活动VAR recommendedevents =
                                选择事件;        recommendedevents = recommendedevents.Where（S = GT; s.Recommended.Equals（真））;        返回PartialView（_ RecommendEvents，recommendedevents）;
    }
 

而code用于显示partialview

  @ Html.Partial（_ RecommmndedEvents）
 

这是我收到的错误

 公众的ActionResult _RecommendedEvents（RecommendedEvents模型）    {        模型=新RecommendedEvents（）;
        从db.Database1活动VAR recommendedevents =
                                选择事件;
        recommendedevents = recommendedevents.Where（S = GT; s.Recommended.Equals（真））;
        返回查看（模型）;
    }
 

解决方案

  @ {
        Html.RenderAction（查看，控制器）
}
 

这将跳转到指定控制器和动作有与正确的模型返回partialview

First of I am a complete beginner at MVC. How would I be able to display data from the database in the events table in a partial view if a certain boolean field is true.

This is my partial view:

@model IEnumerable<TheBigEvent.Models.RecommendedEvents>
<table>
 <tr>

  <td>  
     @Html.DisplayNameFor(model => model.Event_Name)
      </td>
      <td>
      @Html.DisplayNameFor(model => model.Event_Date)

   </td>
  </tr>

 <tr>   

      @foreach (var item in Model) {

          <td>  

    @Html.DisplayFor(modelItem => item.Event_Name)
</td>
     <td>
    @Html.DisplayFor(modelItem => item.Event_Date)
         </td>
     }

 </tr>                          
   </table>

This is my controller

public ActionResult _RecommendedEvents()

    {


        var recommendedevents = from Events in db.Database1
                                select Events;

        recommendedevents = recommendedevents.Where(s => s.Recommended.Equals(true));

        return PartialView("_RecommendEvents", recommendedevents);


    }

And the Code for displaying the partialview

 @Html.Partial("_RecommmndedEvents")

This is the error I am receiving

[EDIT]

 public ActionResult _RecommendedEvents(RecommendedEvents model)

    {

        model = new RecommendedEvents();


        var recommendedevents = from Events in db.Database1
                                select Events;


        recommendedevents = recommendedevents.Where(s => s.Recommended.Equals(true));








        return View(model);


    }

解决方案

@{
        Html.RenderAction("view","controller")
}

This will go to the given controller and action that has to return a partialview with the correct model

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