Question

我有一个来自数据库的类构建，名为RSS_Head。它的一个属性是rss-feed的url。我想在表格中显示链接。

@using Pgsrssreader.Models
@model Pgsrssreader.Models.RSS_Head

<table>
            @{RSS_Head rsshead = new RSS_Head();}
            <tr>

                <th>@Html.LabelFor(model => rsshead.SUrl)</th>
            </tr>

现在我尝试使用foreach循环来显示这样的URL：

  @foreach (var item in Model)
{
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.SUrl)
        </td>
    </tr>
    </table>

我收到错误：

Foreach语句无法对Pgsrssreader.Models.RSS_Head类型的变量进行操作，因为Pgsrssreader.Models.RSS_Head不包含GetEnumerator的公共定义

namespace Pgsrssreader.Models
{
      using System;
      using System.Collections.Generic;

    public partial class RSS_Head
    {
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
        public RSS_Head()
        {
            this.RSS_Row = new HashSet<RSS_Row>();
            this.Rss_Category = new HashSet<Rss_Category>();
        }

        public int iRSSid { get; set; }
        public string SUrl { get; set; }
        public string sTitle { get; set; }
        public string sLink { get; set; }
        public string sDescription { get; set; }
        public string sLanguage { get; set; }
        public Nullable<System.DateTime> dBuildDate { get; set; }
        public string sCopyright { get; set; }
        public string sImageUrl { get; set; }
        public string sImageTitle { get; set; }
        public string sImageDescription { get; set; }
        public Nullable<int> iImageHeight { get; set; }
        public Nullable<int> iImageWidth { get; set; }
        public Nullable<bool> bAktiv { get; set; }
        public Nullable<byte> iDatumKorr { get; set; }
        public Nullable<bool> bDatumFinns { get; set; }
        public Nullable<byte> iTableIndex { get; set; }
        public string sTidning { get; set; }
        public string sCatFieldName { get; set; }
        public string sCatName { get; set; }
        public string sDateFieldName { get; set; }
        public string sDateReplace { get; set; }
        public string sRegexp { get; set; }
        public Nullable<int> iPaperId { get; set; }
        public Nullable<int> iFailed { get; set; }
        public Nullable<bool> IsDeleted { get; set; }

        public virtual RSS_Papers RSS_Papers { get; set; }
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
        public virtual ICollection<RSS_Row> RSS_Row { get; set; }
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
        public virtual ICollection<Rss_Category> Rss_Category { get; set; }
    }   
}

编辑：解决方案 我最终在共享视图中创建了一个帮助类：

public class Rsshelper
{
    private Rss_DevEntities _db = new Rss_DevEntities();


    public List<RSS_Head> Feeds()
    {
        List<RSS_Head> rss_head = new List<RSS_Head>();
        rss_head = _db.RSS_Head.ToList();
        return (rss_head);
    }
}

然后我写了

 @{ 
                List<RSS_Head> rsslist = new List<RSS_Head>();
                Rsshelper rsshelper = new Rsshelper();

                rsslist = rsshelper.Feeds();




            }
    <table>

        @{if (rsslist != null)
            {

                foreach (var item in rsslist)
                {



                    <tr>
                        <td>

                            @item.SUrl
                        </td>
                     </tr>

显示网址。可能有一个更好的解决方案，所以我可以随意改进：）

Answer 1

主要是实体框架是此类操作的最佳方法首先获取列表中的数据库记录。你可以在你的模型中提到这个，

型号：

public IEnumerable<modelname> AnyName{get; set;}

逻辑代码（控制器）：

Public ActionResult Youaction()
{
  modelclass yourmodel= new modelclass();
  yourmodel.AnyName=Fun1();
}
public IEnumerable<modelName> Fun1()
{
   databaseclass dbobj1= new databaseclass();
   tableclass tbl= new tableclass();
   modelName yourmodel= new modelName();
   return(var v in dbobj1.table1 select new model
          modelproperty1=v.tablevalue1,
           .,
           .,
      modelpropertyforUrl=v.tablevalueForUrl
).ToList();

}

您的观点：

<table>
@foreach(var item in AnyName)
{
  <tr>
<td>@item.modelpropertyforUrl</td>
  </tr>
}

</table>

如何在MVC中显示数据库中的表？

1 个答案: