关于ASP.NET MV2，我很少有事情不清楚。
在数据库中，我有一个包含多个字段的表Contacts，还有一个字段XmlFields，其类型为xml。在该字段中存储了附加描述字段
共有4个班级：
Contact类，对应Contact表，在创建LINQ类时默认定义ContactListView继承的类
Contact上课并且有一些
其他属性ContactXmlView包含的类
来自XmlFields字段ContactDetailsView上课哪个
合并ContactListView和
ContactXmlView进入一个班级
这一个用于显示数据
查看页面 ContactListView类重新定义了Contact类中的一些属性（以便我可以添加用于验证的[Required]过滤器） - 但是我收到警告消息：
在创建新联系人并将其添加到数据库时，'ObjectTest.Models.Contacts.ContactListView.FirstName' 隐藏继承的成员 'SA.Model.Contact.FirstName'。使用 如果想隐藏新关键字。
ContactDetailsView类也会在表单中使用。
我不确定这是否正确，警告信息让我感到困惑。有关于此的任何建议吗？
谢谢，
ILE
修改
根据Jakob's instructions我从头开始尝试：
[MetadataType(typeof(Person_Validation))]
public partial class Person
{
}
public class Person_Validation
{
[Required]
string FirstName { get; set; }
[Required]
string LastName { get; set; }
[Required]
int Age { get; set; }
}
在控制器中我有这个：
[HttpPost]
public ActionResult Create(Person person, FormCollection collection)
{
if (ModelState.IsValid)
{
try
{
personRepository.Add(person);
personRepository.Save();
}
catch
{
return View(person);
}
}
return RedirectToAction("Index");
}
查看：
<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<Validate.Models.Person>" %>
<asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">
Create
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<h2>Create</h2>
<% using (Html.BeginForm()) {%>
<%= Html.ValidationSummary(true) %>
<fieldset>
<legend>Fields</legend>
<div class="editor-label">
<%= Html.LabelFor(model => model.FirstName) %>
</div>
<div class="editor-field">
<%= Html.TextBoxFor(model => model.FirstName) %>
<%= Html.ValidationMessageFor(model => model.FirstName) %>
</div>
<div class="editor-label">
<%= Html.LabelFor(model => model.LastName) %>
</div>
<div class="editor-field">
<%= Html.TextBoxFor(model => model.LastName) %>
<%= Html.ValidationMessageFor(model => model.LastName) %>
</div>
<div class="editor-label">
<%= Html.LabelFor(model => model.Age) %>
</div>
<div class="editor-field">
<%= Html.TextBoxFor(model => model.Age) %>
<%= Html.ValidationMessageFor(model => model.Age) %>
</div>
<p>
<input type="submit" value="Create" />
</p>
</fieldset>
<% } %>
<div>
<%= Html.ActionLink("Back to List", "Index") %>
</div>
</asp:Content>
在发布没有值的新人时，没有任何反应（页面只是重新加载）。使用某些值发布时，person会添加到db。 我不知道我做错了什么。
编辑2
我认为问题出现在已经生成了部分类Person的LINQ中。当我定义新的部分类Person并单击它并“转到定义”时，我收到以下警告：
C：\ Documents and Settings \ Korisnik \ My Documents \ Visual Studio 2008 \项目\验证\验证\型号\ DataClasses1.designer.cs - （78,23）：Validate.Models.Person
C：\ Documents and Settings \ Korisnik \ My Documents \ Visual Studio 2008 \项目\验证\验证\型号\ PersonRepository.cs - （11,26）：Validate.Models.Person
这是LINQ生成的类的一部分：
[Table(Name="dbo.Persons")]
public partial class Person : INotifyPropertyChanging, INotifyPropertyChanged
{
private static PropertyChangingEventArgs emptyChangingEventArgs = new PropertyChangingEventArgs(String.Empty);
private int _PersonID;
private string _FirstName;
private string _LastName;
private string _Age;
...
我很确定这是原因，但我不知道如何解决这个问题。有什么想法吗？
编辑3
好吧，让我们从头开始......所以这是文件夹结构：
Dataclasses1.designer.cs：
#pragma warning disable 1591
//------------------------------------------------------------------------------
// <auto-generated>
// This code was generated by a tool.
// Runtime Version:2.0.50727.3603
//
// Changes to this file may cause incorrect behavior and will be lost if
// the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
namespace Validate.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;
[System.Data.Linq.Mapping.DatabaseAttribute(Name="Database1")]
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 InsertPerson(Person instance);
partial void UpdatePerson(Person instance);
partial void DeletePerson(Person instance);
#endregion
public DataClasses1DataContext() :
base(global::System.Configuration.ConfigurationManager.ConnectionStrings["Database1ConnectionString"].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<Person> Persons
{
get
{
return this.GetTable<Person>();
}
}
}
[Table(Name="dbo.Persons")]
public partial class Person : INotifyPropertyChanging, INotifyPropertyChanged
{
private static PropertyChangingEventArgs emptyChangingEventArgs = new PropertyChangingEventArgs(String.Empty);
private int _PersonID;
private string _FirstName;
private string _LastName;
private string _Age;
#region Extensibility Method Definitions
partial void OnLoaded();
partial void OnValidate(System.Data.Linq.ChangeAction action);
partial void OnCreated();
partial void OnPersonIDChanging(int value);
partial void OnPersonIDChanged();
partial void OnFirstNameChanging(string value);
partial void OnFirstNameChanged();
partial void OnLastNameChanging(string value);
partial void OnLastNameChanged();
partial void OnAgeChanging(string value);
partial void OnAgeChanged();
#endregion
public Person()
{
OnCreated();
}
[Column(Storage="_PersonID", AutoSync=AutoSync.OnInsert, DbType="Int NOT NULL IDENTITY", IsPrimaryKey=true, IsDbGenerated=true)]
public int PersonID
{
get
{
return this._PersonID;
}
set
{
if ((this._PersonID != value))
{
this.OnPersonIDChanging(value);
this.SendPropertyChanging();
this._PersonID = value;
this.SendPropertyChanged("PersonID");
this.OnPersonIDChanged();
}
}
}
[Column(Storage="_FirstName", DbType="NChar(10)")]
public string FirstName
{
get
{
return this._FirstName;
}
set
{
if ((this._FirstName != value))
{
this.OnFirstNameChanging(value);
this.SendPropertyChanging();
this._FirstName = value;
this.SendPropertyChanged("FirstName");
this.OnFirstNameChanged();
}
}
}
[Column(Storage="_LastName", DbType="NChar(10)")]
public string LastName
{
get
{
return this._LastName;
}
set
{
if ((this._LastName != value))
{
this.OnLastNameChanging(value);
this.SendPropertyChanging();
this._LastName = value;
this.SendPropertyChanged("LastName");
this.OnLastNameChanged();
}
}
}
[Column(Storage="_Age", DbType="NChar(10)")]
public string Age
{
get
{
return this._Age;
}
set
{
if ((this._Age != value))
{
this.OnAgeChanging(value);
this.SendPropertyChanging();
this._Age = value;
this.SendPropertyChanged("Age");
this.OnAgeChanged();
}
}
}
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
PersonRepository.cs：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations;
using System.Web.Mvc;
using Validate.Models;
namespace Validate.Models
{
[MetadataType(typeof(Person_Validation))]
public partial class Person
{
}
public class Person_Validation
{
[Required]
string FirstName { get; set; }
[Required]
string LastName { get; set; }
[Required]
int Age { get; set; }
}
public class PersonRepository
{
private DataClasses1DataContext db = new DataClasses1DataContext();
public IQueryable<Person> FindAllPersons()
{
return db.Persons;
}
public Person GetPerson(int id)
{
return db.Persons.SingleOrDefault(x => x.PersonID == id);
}
public void Add(Person person)
{
db.Persons.InsertOnSubmit(person);
}
public void Delete(Person person)
{
db.Persons.DeleteOnSubmit(person);
}
public void Save()
{
db.SubmitChanges();
}
}
}
/Views/Person/Create.aspx：
<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<Validate.Models.Person>" %>
<asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">
Create
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<h2>Create</h2>
<%= ViewData["greska"]%>
<% using (Html.BeginForm()) {%>
<%= Html.ValidationSummary(true) %>
<fieldset>
<legend>Fields</legend>
<div class="editor-label">
<%= Html.LabelFor(model => model.FirstName) %>
</div>
<div class="editor-field">
<%= Html.TextBoxFor(model => model.FirstName) %>
<%= Html.ValidationMessageFor(model => model.FirstName) %>
</div>
<div class="editor-label">
<%= Html.LabelFor(model => model.LastName) %>
</div>
<div class="editor-field">
<%= Html.TextBoxFor(model => model.LastName) %>
<%= Html.ValidationMessageFor(model => model.LastName) %>
</div>
<div class="editor-label">
<%= Html.LabelFor(model => model.Age) %>
</div>
<div class="editor-field">
<%= Html.TextBoxFor(model => model.Age) %>
<%= Html.ValidationMessageFor(model => model.Age) %>
</div>
<p>
<input type="submit" value="Create" />
</p>
</fieldset>
<% } %>
<div>
<%= Html.ActionLink("Back to List", "Index") %>
</div>
</asp:Content>
答案 0 :(得分：5)
执行此操作的一种方法是使用MetadataTypeAttribute。此属性允许您将“伙伴”类与LINQ2SQL类相关联。 buddy类包含与原始类相同的属性，但ASP.NET MVC将从buddy类中读取验证属性。引入了MetadataTypeAttribute是因为C＃不允许您添加在基类中定义的属性 - 因此您将获得错误。
以下示例是从MSDN复制的：
[MetadataType(typeof(CustomerMetaData))]
public partial class Customer
{
}
public class CustomerMetaData
{
// Apply RequiredAttribute
[Required(ErrorMessage = "Title is required.")]
public object Title { get; set; }
}
修改
我不确定您的操作实施是否正确。当模型状态无效时，您希望再次显示“创建”视图。请尝试沿着这些方向尝试：
[HttpPost]
public ActionResult Create(Person person, FormCollection collection)
{
if (ModelState.IsValid)
{
try
{
personRepository.Add(person);
personRepository.Save();
return RedirectToAction("Index");
}
catch
{
return View(person);
}
}
else
return View(person);
}
编辑2：
Linq2Sql已经为你创建了一个部分Person类，这就是应该的样子。当您创建自己的部分Person类时，编译器会将您的类定义与Linq2Sql创建的类定义合并到单个Person类。但是，两个部分类定义在同一个程序集中和在同一个名称空间中非常重要。因此，请确保将部分Person类定义放在与Linq2Sql Person类相同的命名空间中。
编辑3：
我突然想到你Person_Validation课程的属性是私有的。他们需要公开。我希望有所帮助： - ）
答案 1 :(得分：2)
@Jakob会显示正确的方法。您可能还需要考虑将视图模型与数据模型分离，并将注释添加到视图模型中。这并不妨碍您在数据模型上使用基于元数据的验证，但它会进一步将您的视图与数据模型分离。我经常发现在我的视图中需要更多（或不同）的数据，而不是试图用非持久性数据扩展数据模型类，我发现使用单独的视图模型并在两者之间进行转换是可取的。 / p>