如何显示从控制器发送的数据到视图？ [英] How to display data sent from controller to view ?

问题描述

  ///  获取所有国家/地区
  < span class =code-summarycomment> ///   <   / summary  >  
   ///  < span class =code-comment> <  返回  >  <   / returns  >  
   public  IQueryable GetAllCountry（）
 {
 使用（Context context =  new  Context（））
 {
  var  count ries = context.COUNTRY.Select（c = >   new  
 {
 country =  new  
 {
 ID = c.ID，
说明= c.DESCRIPTION，
 CountryPhoneCode = c。 COUNTRY_PHONE_CODE，
货币= c.CURRENCY.CURRENCY，
语言= context.LANGUAGE.Where（l = >  l.COUNTRY_ID == c .ID）。选择（l = >   new  {lang = l.DESCRIPTION}）。Distinct（ ）
} 
}）; 
 
 返回个国家/地区; 
} 
 
} 
 

 < span class =code-comment> //   GET：/ Country / My controller  
 
  public  ActionResult DisplayCountries（）
 {
 DAL library =  new  DAL（）; 
 
  var  country = library.GetAllCountry（）; 
 ViewBag.countries = country; 
  return 查看（  DisplayCountries）; 
} 
 
  //  我的观点 
 
 @ {
 ViewBag.Title =   DisplayCountries; 
} 
 
国家/地区列表
 
 @ {
  var  countries = ViewBag.countries; 
 
  foreach （ var  country 在国家/地区）
 {
 @ country.country.ID;  //  未定义属性国家/地区。错误！ 
} 
} 

问题：

如何显示从控制器发送到View的数据。我是否需要创建一个单独的类来显示数据？没有别的方法可以做到这一点吗？如果我不想使用ViewBag，有什么选择？

解决方案

viewbag的替代方法是将countries对象作为模型发送，以查看和添加strogly类型的视图。 />
，代码将是，

  //  控制器 
  public  ActionResult DisplayCountries（）
 {
 DAL library =  new  DAL（）; 
 
  var  country = library.GetAllCountry（）; 
  return 查看（  DisplayCountries，国家）; 
} 
 
  //  查看 
 @model Demo.Counties 
 
< ul> 
 @foreach（ var  country  in  Model.Countries）
 {
< li> country.Description < /   li   >  
} 
 < /   ul  >  

/// Get All Countries
     /// </summary>
     /// <returns></returns>
     public IQueryable GetAllCountry()
     {
         using (Context context = new Context())
         {
             var countries = context.COUNTRY.Select(c => new
             {
                 country = new
                 {
                     ID = c.ID,
                     Description = c.DESCRIPTION,
                     CountryPhoneCode = c.COUNTRY_PHONE_CODE,
                     Currency = c.CURRENCY.CURRENCY,
                     Language = context.LANGUAGE.Where(l => l.COUNTRY_ID == c.ID).Select( l => new { lang = l.DESCRIPTION }).Distinct()
                 }
             });

             return countries;
         }

     }

        // GET: /Country/ My controller 

        public ActionResult DisplayCountries()
        {
            DAL library = new DAL();

            var country = library.GetAllCountry();
            ViewBag.countries = country;
            return View("DisplayCountries");
        }

//My View

@{
    ViewBag.Title = "DisplayCountries";
}

Country list

   @{
       var countries = ViewBag.countries;

        foreach (var country in countries)
        {
            @country.country.ID; // property country is not defined. error!
        }
   }

Problem:
How do I display the data sent from controller to View. Do I need to create a separate class to display the data? Is there no other way to do this ? What are the alternatives if I dont want to use ViewBag ?

解决方案

Alternative for viewbag is send the countries object as a model to view and add strogly typed view.
and the code will be ,

//Controller
 public ActionResult DisplayCountries()
        {
            DAL library = new DAL();
 
            var country = library.GetAllCountry();           
            return View("DisplayCountries",country);
        }

//View
@model Demo.Counties

<ul>
@foreach(var country in Model.Countries)
{
 <li>country.Description</li>
}
</ul>

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