数据库第一个数据注释问题asp.net mvc 4

Question

我在使用数据库优先方法模型验证时遇到问题，我阅读了 Scott Gu 的著名 ASP.NET MVC 2: Model Validation，但问题是它在我的 mvc 项目中不起作用，我在 Project.Model 类中有我的 Edmx 文件库，以及我在 Project.Model.Membership 命名空间中的验证类，我在这里并没有真正理解问题的概念。 这是代码：

namespace Project.Model
//part of generated code by EF database first
public partial class Member
{
    public Member()
    {
        this.SideDuties = new HashSet<SideDuty>();
        this.Member_In_Role = new HashSet<Member_In_Role>();
        this.Messages = new HashSet<Message>();
        this.Messages1 = new HashSet<Message>();
    }

    public System.Guid mId { get; set; }
    public byte MemberTypeNo { get; set; }
    public string mName { get; set; }
    public string mLName { get; set; }
    public string mUserName { get; set; }
    public string mPass { get; set; }
    public Nullable<byte> MarriageStatusNo { get; set; }
    public Nullable<byte> GenderNo { get; set; }
    public Nullable<int> mPhone { get; set; }
    public Nullable<long> mMobile { get; set; }
    public Nullable<int> mEmrgPhone { get; set; }
    public Nullable<long> mEmrgMobile { get; set; }
    public string mEmail { get; set; }
    public string mProfilePicExt { get; set; }
    public bool mIsOperator { get; set; }
    public bool mIsAdmin { get; set; }

    public virtual ...
}



namespace Project.Model.membership
//my class handling data annotations, not work!
[MetadataType(typeof(Member_Validation))]
public partial class Member
{

}

//buddy class
[Bind(Exclude = "mId")]
public sealed class Member_Validation
{
    //public System.Guid mId { get; set; }
    public byte MemberTypeNo { get; set; }
    [Required(ErrorMessage = "blah blah")]
    public string mName { get; set; }
    [Required]
    public string mLName { get; set; }
    public string mUserName { get; set; }
    public string mPass { get; set; }
    public Nullable<byte> MarriageStatusNo { get; set; }
    public Nullable<byte> GenderNo { get; set; }
    public Nullable<int> mPhone { get; set; }
    public Nullable<long> mMobile { get; set; }
    public Nullable<int> mEmrgPhone { get; set; }
    public Nullable<long> mEmrgMobile { get; set; }
    public string mEmail { get; set; }
    public string mProfilePicExt { get; set; }
    public bool mIsOperator { get; set; }
    public bool mIsAdmin { get; set; }
}

Answer 1

好的，所以首先，看看这个： http://www.asp.net/mvc/tutorials/mvc-4/getting-started-with-aspnet-mvc4/adding-validation-to-the-model

其次，我建议使用 ViewModels 来验证对象。就像下面的代码（快捷方式）：

MemberViewModel.cs

public class MemberViewModel
{
    [Required]
    [StringLength(10)]
    public string mName { get; set; }

    [Required]
    public string mLName { get; set; }
}

然后，将您的 ViewModel 发送到编辑/添加视图：

Add.cshtml

@Model MemberViewModel //namespace etc.


@using (Html.BeginForm("Add"))
{

@Html.ValidationSummary()
@ViewBag.Status
    @Html.LabelFor(m => m.mName)
    @Html.TextBoxFor(m => m.mName)
    @Html.ValidationMessageFor(m => m.mName)

    @Html.LabelFor(m => m.mLName)
    @Html.TextBoxFor(m => m.mLName)
    @Html.ValidationMessageFor(m => m.mLName)

    <input type="submit" />
}

控制器和添加 ActionResult

    [HttpPost]
    public ActionResult Add(MemberViewModel model)
    {

        if (ModelState.IsValid)
        {
            Member memberToAdd = new Member{ };

            memberToAdd.mLName = model.mLName;
            memberToAdd.mName = model.mName;
            (..)

            //some operation, perhaps on database, with memberToAdd

            return RedirectToAction("xyz");
        }
        else
            return View(model);
    }

使用这种方法，您将拥有清晰的实体模型（POCO 类，如 Member）和 Domian 模型（ViewModels，如 MemberViewModel），并带有自定义验证。