5
我刚开始做MVC 4，我一直很享受它，但是当我遇到麻烦时我会遇到麻烦试图让我的数据库（只是NAME和EMAIL条目）在索引视图中显示其所有条目。我得到以下错误：MVC - 词典需要一个'System.Collections.Generic.IEnumerable`类型的模型项目1
The model item passed into the dictionary is of type 'System.Collections.Generic.List
1[MobileWebFormver2.Models.WebForm1]', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable1[MobileWebFormver2.Models.User]'.
我能够将程序连接到数据库，但我几乎卡在这里。我想知道我能否得到一些帮助。这里是我的代码：
用户类别
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations;
namespace MobileWebFormver2.Models
{
public class User
{
[Required(ErrorMessage="Please enter name.")]
public string Name { get; set; }
[Required(ErrorMessage="Please enter email.")]
public string Email { get; set; }
}
}
的HomeController（WebForm1的是数据库条目，包含姓名和电子邮件字段）
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MobileWebFormver2.Models;
using System.Data.Entity;
namespace MobileWebFormver2.Controllers
{
public class HomeController : Controller
{
DataClasses1DataContext db = new DataClasses1DataContext();
public ActionResult Index()
{
ViewBag.Message = "This is the TourEast Holidays Mobile Index";
return View(db.WebForm1s.ToList());
}
}
}
指数
@model IEnumerable<MobileWebFormver2.Models.User>
@{
ViewBag.Title = "Home Page";
}
@foreach (var item in Model)
{
<tr>
<td>
@Html.DisplayFor(modelItem => item.Name)
</td>
<td>
@Html.DisplayFor(modelItem => item.Email)
</td>
</tr>
}
编辑：这是指DataClasses1DataContext。我不知道这将是多么有用。
DataClasses1.cs
namespace MobileWebFormver2.Models
{
partial class DataClasses1DataContext
{
}
}
DataClasses1.designer.cs
#pragma warning disable 1591
//------------------------------------------------------------------------------
// <auto-generated>
// This code was generated by a tool.
// Runtime Version:4.0.30319.269
//
// Changes to this file may cause incorrect behavior and will be lost if
// the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
namespace MobileWebFormver2.Models
{
using System.Data.Linq;
using System.Data.Linq.Mapping;
using System.Data;
using System.Collections.Generic;
using System.Reflection;
using System.Linq;
using System.Linq.Expressions;
using System.ComponentModel;
using System;
[global::System.Data.Linq.Mapping.DatabaseAttribute(Name="MobileWebForm")]
public partial class DataClasses1DataContext : System.Data.Linq.DataContext
{
private static System.Data.Linq.Mapping.MappingSource mappingSource = new AttributeMappingSource();
#region Extensibility Method Definitions
partial void OnCreated();
partial void InsertWebForm1(WebForm1 instance);
partial void UpdateWebForm1(WebForm1 instance);
partial void DeleteWebForm1(WebForm1 instance);
#endregion
public DataClasses1DataContext() :
base(global::System.Configuration.ConfigurationManager.ConnectionStrings["MobileWebFormConnectionString"].ConnectionString, mappingSource)
{
OnCreated();
}
public DataClasses1DataContext(string connection) :
base(connection, mappingSource)
{
OnCreated();
}
public DataClasses1DataContext(System.Data.IDbConnection connection) :
base(connection, mappingSource)
{
OnCreated();
}
public DataClasses1DataContext(string connection, System.Data.Linq.Mapping.MappingSource mappingSource) :
base(connection, mappingSource)
{
OnCreated();
}
public DataClasses1DataContext(System.Data.IDbConnection connection, System.Data.Linq.Mapping.MappingSource mappingSource) :
base(connection, mappingSource)
{
OnCreated();
}
public System.Data.Linq.Table<WebForm1> WebForm1s
{
get
{
return this.GetTable<WebForm1>();
}
}
}
[global::System.Data.Linq.Mapping.TableAttribute(Name="dbo.WebForm1")]
public partial class WebForm1 : INotifyPropertyChanging, INotifyPropertyChanged
{
private static PropertyChangingEventArgs emptyChangingEventArgs = new PropertyChangingEventArgs(String.Empty);
private string _Name;
private string _Email;
#region Extensibility Method Definitions
partial void OnLoaded();
partial void OnValidate(System.Data.Linq.ChangeAction action);
partial void OnCreated();
partial void OnNameChanging(string value);
partial void OnNameChanged();
partial void OnEmailChanging(string value);
partial void OnEmailChanged();
#endregion
public WebForm1()
{
OnCreated();
}
[global::System.Data.Linq.Mapping.ColumnAttribute(Storage="_Name", DbType="NVarChar(50) NOT NULL", CanBeNull=false, IsPrimaryKey=true)]
public string Name
{
get
{
return this._Name;
}
set
{
if ((this._Name != value))
{
this.OnNameChanging(value);
this.SendPropertyChanging();
this._Name = value;
this.SendPropertyChanged("Name");
this.OnNameChanged();
}
}
}
[global::System.Data.Linq.Mapping.ColumnAttribute(Storage="_Email", DbType="NVarChar(50) NOT NULL", CanBeNull=false)]
public string Email
{
get
{
return this._Email;
}
set
{
if ((this._Email != value))
{
this.OnEmailChanging(value);
this.SendPropertyChanging();
this._Email = value;
this.SendPropertyChanged("Email");
this.OnEmailChanged();
}
}
}
public event PropertyChangingEventHandler PropertyChanging;
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void SendPropertyChanging()
{
if ((this.PropertyChanging != null))
{
this.PropertyChanging(this, emptyChangingEventArgs);
}
}
protected virtual void SendPropertyChanged(String propertyName)
{
if ((this.PropertyChanged != null))
{
this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}
}
#pragma warning restore 1591'
我看着类似的帖子在这里，我知道它有传递对象的事，但观点期待别的东西。不过，我会说我是一名初学者水平的程序员，我不认为我理解他们所说的大部分内容。我基本上遵循了来自Microsoft的MVC教程网站（Link）中关于如何在索引中显示数据库的代码，但是我收到了错误消息。任何指导将不胜感激。
你可以显示你的DbContext的实现吗？你需要一个DbSet来进行查询。 –
您能否向我提供关于如何显示实施的说明？我的道歉，我是一个真正的初学者哈哈。谢谢！ –
好吧，我去了我的模型，并有一个DataClasses1.dbml。我右键单击它并单击查看代码，现在我在DataClasses1.cs中。在代码中的所有存在的是：命名空间MobileWebFormver2.Models { 部分类DataClasses1DataContext { } } @LeonCullens –