ModelState.IsValid一直返回为false

Question

所以我有一个视图，其中成员输入与他们相关的PIN以登录

@model Models.Member
@{
Layout = "~/Views/Shared/_HomeLayout.cshtml";
}
<h1 style="margin-top: 0px;">Club Members Login Below!</h1> @*add this to the style for better ipad title -> "text-align: center;"*@
</br>
@using (Html.BeginForm("ClubHours", "Login", FormMethod.Post))
{
@Html.LabelFor(c => c.PIN)
@Html.TextBoxFor(c => c.PIN)<br />
@Html.ValidationMessageFor(c => c.PIN)<br />
<input type="submit" name="submit" value="ClockIn" />
<input type="submit" name="submit" value="ClockOut" />
}

它与这个动作结果相互作用：

[HttpPost]
public ActionResult ClubHours(string submit, Member member)//member clocking in
{
if (submit.Equals("ClockIn"))
{
if (!ModelState.IsValid) //validating events fields
{
return View("UserLogin");
}
else
{
var mem = _context.Members.SingleOrDefault(c => c.PIN == member.PIN);
var hours = new MemberClubHours();
hours.ClockIn = DateTime.Now;
mem.Hours.Add(hours);
_context.SaveChanges();
return View("ClockIn");
}
}
else if (submit.Equals("ClockOut"))
{
if (!ModelState.IsValid) //validating events fields
{
return View("UserLogin");
}
else
{
var mem = _context.Members.SingleOrDefault(c => c.PIN == member.PIN);
var hours = new MemberClubHours();
hours.ClockOut = DateTime.Now;
mem.Hours.Add(hours);
_context.SaveChanges();
return View("ClockOut");
}
}
else
{
return View("UserLogin","Login");
}
}

最后是会员级

public class Member
{
public int Id { get; set; }
[Required]
[MaxLength(4, ErrorMessage = "PIN must be 4 numbers long"), MinLength(4, ErrorMessage = "PIN must be 4 numbers long")]
public string PIN { get; set; }
[Required]
[Display(Name ="First Name")]
public string FirstName { get; set; }
[Required]
[Display(Name = "Last Name")]
public string LastName { get; set; }
[Display(Name = "Date of Birth")]
public DateTime? Birthdate { get; set; }
public virtual ICollection<MemberClubHours> Hours { get; } = new HashSet<MemberClubHours>();
}

和会员俱乐部小时类

public class MemberClubHours
{
public int Id { get; set; }
public DateTime? ClockIn { get; set; }
public DateTime? ClockOut { get; set; }
[Required]
public Member Member { get; set; }
}

该代码工作正常，将跟踪成员的工作时间，但我正在尝试实现验证，但即使我在系统中输入了与成员关联的PIN，它也会返回为无效？任何帮助都将不胜感激！

Answer 1

您正在验证从前端发送的模型。不是数据库，你确定模型是根据你在模型中的数据注释填充的吗？

查看ModelState，它是asp.net内核3.1，但仍然与相关

Answer 2

成员模型显示为无效，因为成员模型需要Id、PIN、FirstName和LastName字段。

您无法使用ModelState.IsValid验证此类，因为它将检查所有属性——并且看起来您只是在传递PIN属性

如果你不想为它创建一个viewModel，你可以将这些属性作为隐藏的输入字段；

@using (Html.BeginForm("ClubHours", "Login", FormMethod.Post))
{
@Html.HiddenFor(c=>c.Id)
@Html.HiddenFor(c=>c.FirstName)
@Html.HiddenFor(c=>c.LastName)
@Html.LabelFor(c => c.PIN)
@Html.TextBoxFor(c => c.PIN)<br />
@Html.ValidationMessageFor(c => c.PIN)<br />
<input type="submit" name="submit" value="ClockIn" />
<input type="submit" name="submit" value="ClockOut" />
}