Question

我如何使这项工作就像我的数据库表中有5个字段一样。

我使用datannotations创建了一个验证模型，并创建了compare password字段以及comparepassword属性。（现在我的模型有6个字段，包括一个外部字段比较密码和5个数据库字段）
我使用该模型创建了一个视图。（用户）
现在我也创建了一个控制器，但问题出在这里，当调用ActionMethod编译器抱怨外部字段并告诉它找不到任何扩展方法时。如何创建扩展方法或解决此错误？
```
[HttpPost]
public ActionResult Create(User Users)
{

}
```

这是我得到的错误：

CS1061：'MvcApplication1.Models.User'不包含'ComparePassword'的定义，并且没有可以找到接受类型'MvcApplication1.Models.User'的第一个参数的扩展方法'ComparePassword'（你是否错过了使用指令或程序集引用？）

我的模特：

[MetadataType(typeof(UserModel))]
public partial class User { }  
public class UserModel
{
    [Display(Name = "User Name")]        
    [Remote("Username", "User", ErrorMessage = "User Name already exists")]
    [Required(ErrorMessage = "User Name is required")]
    public string vcr_UserName { get; set; }

    [RegularExpression(@"\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*", ErrorMessage = "Must be a valid Email Address")]
    [Remote("EmailAddress", "User", ErrorMessage = "Email Address already exists")]
    [Required(ErrorMessage = "Email is required")]
    [Display(Name = "Email Address")]
    public string vcr_EmailAddress { get; set; }

    [Display(Name = "Password")]
    [RegularExpression(@"^.{3,16}$", ErrorMessage = "The Password length must be between 3 and 16 characters ")]
    [Required(ErrorMessage = "Password is required")]
    public string vcr_Password { get; set; }

    [Display(Name = "Compare Password")]
    [Compare("vcr_Password", ErrorMessage = "Passwords do not match")]
    public string ComparePassword { get; set; }


    [Required(ErrorMessage = "Country is required")]
    [Display(Name = "Country")]
    public string vcr_Country { get; set; }

    [Required(ErrorMessage = "Website is required")]
    [Display(Name = "WebSite")]        
    public string vcr_Website { get; set; }

    [Display(Name = "Expertise")]
    [Required(ErrorMessage = "Expertise is required")]
    public string vcr_Expertise { get; set; }

    public int int_GroupId { get; set; }
    public Boolean bit_Active { get; set; }
}

我的控制器

  public ActionResult Create()
    {
        return View();
    }
    [HttpPost]
    public ActionResult Create(User Users)
    {
        try
        {

            UserRepository UserRep = new UserRepository();
            if (ModelState.IsValid)
            {
                Users.int_GroupId = 2;
                Users.dtm_CreatedDate = DateTime.Now;
                Users.bit_Active = true;
                UserRep.Add(Users);
                UserRep.Save();
            }
            return View();
        }
        catch { return View(); }
    }

查看

@model MvcApplication1.Models.User
   {
ViewBag.Title = "Index";
Layout = "~/Views/Shared/_Layout.cshtml";

}

索引

@using (Html.BeginForm()) {



  @Html.ValidationSummary(true)
<fieldset>
    <legend>Users</legend>

    <div class="editor-label">
        @Html.LabelFor(model => model.vcr_UserName)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.vcr_UserName)
        @Html.ValidationMessageFor(model => model.vcr_UserName)
    </div>
    <div class="editor-label">
        @Html.LabelFor(model => model.vcr_Password)
    </div>
    <div class="editor-field">
        @Html.PasswordFor(model => model.vcr_Password)
        @Html.ValidationMessageFor(model => model.vcr_Password)
    </div>
    <div class="editor-label">
        @Html.LabelFor(model => model.ComparePassword)
    </div>
    <div class="editor-field">
        @Html.PasswordFor(model => model.ComparePassword)
        @Html.ValidationMessageFor(model => model.ComparePassword)
    </div>
    <div class="editor-label">
        @Html.LabelFor(model => model.vcr_EmailAddress)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.vcr_EmailAddress)
        @Html.ValidationMessageFor(model => model.vcr_EmailAddress)
    </div>

    <p>
        <input type="submit" value="Create" />
    </p>

    </fieldset>

}

好的，当我点击创建我收到上述错误

Answer 1

“外场”是什么意思？

已经想到的一件事是：

不应将视图行为的数据注释放在模型类上。您应该将面向数据库的模型与面向视图的视图模型分开。有很多关于此的文章。

如果你创建了一个viewmodel，你可以在那里添加第6个字段，添加数据注释，让验证做它的事情等等。

您可以使用AutoMapper或ValueInjecter等工具执行从模型到视图模型的映射，反之亦然，这样您就不必编写太多代码。

如果您有任何其他问题，请随时提出......

asp.net mvc 3 dataanotation在模型中的数据库字段外部未验证

索引

1 个答案: