ASP.NET MVC 生成的视图无法正常工作

Question

我有一个奇怪的错误。 我使用 SQL Server Management Studio 创建了数据库。所有主键、外键、唯一集和工作。

我将数据库导入 mvc 项目并生成模型、控制器和视图，所有这些都与本教程中的一样：click

但由于未知原因，内置验证仅适用于外键！即使所有其他验证规则都是由 Visual Studio 搭建的。

不知道我应该提供什么代码，所以请随意提问，我会更新我的问题。

例如：创建用户：

@model magazyn.Models.User

@{
    ViewBag.Title = "Create";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Create</h2>


@using (Html.BeginForm()) 
{
    @Html.AntiForgeryToken()

<div class="form-horizontal">
    <h4>User</h4>
    <hr />
    @Html.ValidationSummary(true)

    <div class="form-group">
        @Html.LabelFor(model => model.EmployeeNo, new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.EmployeeNo)
            @Html.ValidationMessageFor(model => model.EmployeeNo)
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Name, new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Name)
            @Html.ValidationMessageFor(model => model.Name)
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Surname, new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Surname)
            @Html.ValidationMessageFor(model => model.Surname)
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.ContactInfo, new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.ContactInfo)
            @Html.ValidationMessageFor(model => model.ContactInfo)
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.RoleId, "RoleId", new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.DropDownList("RoleId", String.Empty)
            @Html.ValidationMessageFor(model => model.RoleId)
        </div>
    </div>

    <div class="form-group">
        <div class="col-md-offset-2 col-md-10">
            <input type="submit" value="Create" class="btn btn-default" />
        </div>
    </div>
</div>
}

<div>
    @Html.ActionLink("Back to List", "Index")
</div>

控制器：

        public ActionResult Create()
    {
        ViewBag.RoleId = new SelectList(db.Roles, "Id", "RoleName");
        return View();
    }
    [HttpPost]
    [ValidateAntiForgeryToken]
    [UserEditAuth]
    public ActionResult Create([Bind(Include="Id,EmployeeNo,Name,Surname,ContactInfo,RoleId")] User user)
    {
        if (ModelState.IsValid)
        {
            db.Users.Add(user);
            db.SaveChanges();
            return RedirectToAction("Index");
        }
        ViewBag.RoleId = new SelectList(db.Roles, "Id", "RoleName", user.RoleId);
        return View(user);
    }

和用户实体（由entityFramework生成）：

public partial class User
{
    public User()
    {
        this.DeviceUsages = new HashSet<DeviceUsage>();
    }

    public int Id { get; set; }
    public string EmployeeNo { get; set; }
    public string Name { get; set; }
    public string Surname { get; set; }
    public string ContactInfo { get; set; }
    public int RoleId { get; set; }

    public virtual ICollection<DeviceUsage> DeviceUsages { get; set; }
    public virtual Role Role { get; set; }
}

在这种情况下，仅验证角色，因为它是来自其他表的外键

Answer 1

您正在使用Database-first 方法来生成所有模型。您必须扩展每个 EF 生成的模型，然后提供 metadata 以将每个属性注释为Required、MaxLength 等。您应该看看这里：

• Data Validation in ASP.NET MVC Database First
• ASP.NET MVC3 - Data Annotations with EF Database First (ObjectConext, DbContext)
• MVC 4 - Database First - Add validation
• MVC3 Validation with Entity Framework Model/Database First