Question

有一种表格，我将要求学术详情：

毕业
毕业后（硕士）
专业资格。

到目前为止，任何用户都说UserId =“1”将在我的AcademicMaster中创建3个条目，分别用于学士，硕士（毕业后）和专业资格。

我的数据库AcademicMaster表字段和datamodel：

Id,Qualification(GraduationCourses),Acheievement,UserId

查看型号：

public class AcademicViewModel
{
    public int Id { get; set; }
    public virtual Graduation     Graduation{ get; set; }
    public virtual PostGraduation PostGraduation{ get; set; }
    public virtual ProfessionalQualification ProfessionalQualification{ get; set; }
}

public class Graduation
{
    public string BachelorQualification { get; set; }
    public string BachelorAchievement { get; set; }
}
public class PostGraduation
{
    public string MasterQualification { get; set; }
    public string MasterAchievement { get; set; }
}
public class ProfessionalQualification
{
    public string ProfessionalQualifications { get; set; }
}

所以我的观点是这样的：

@model AcademicViewModel
@{
    IEnumerable<SelectListItem> graduationList = ViewBag.GraduationList;
    IEnumerable<SelectListItem> postGraduationList = ViewBag.PostGraduationList;
}
@using (Html.BeginForm())
{
    <div class="row">
        Bachelors
        @Html.DropDownListFor(model => model.Graduation.Qualification, graduationList)
    </div>
    @Html.TextAreaFor(model => model.Graduation.Achievement)

    <div class="row">
        MASTERS
        @Html.DropDownListFor(model => model.PostGraduation.Qualification, postGraduationList)
    </div>
    @Html.TextAreaFor(model => model.PostGraduation.Achievement)
    <div class="row">
        PROFESSIONAL QUALIFITCATION
        @Html.TextAreaFor(model => model.ProfessionalQualification.ProfessionalQualifications)
    </div>
    <input type="submit" value="Save">
}

这是我的控制器：

[HttpPost]
public ActionResult MyController(AcademicViewModel model)
{
    //Actions
}

我的视图模型结构是否合适以及如何在AcademicMaster表中创建3个条目？

Answer 1

我首先要说的是，拥有一个表可能不是最佳选择（如果稍后您开始添加可能适用于Graduation但不适用于Professional的其他属性会发生什么情况 - 对于示例YearOfGraduation - 您最终可能会有大量字段，其中许多字段可能有null个值。

但是，如果您想要一个表，那么至少要添加另一个字段，以便您可以确定数据是否与Graduation，PostGraduation或Professional相关。 AcademicMasters表的关联数据模型将是

public class AcademicMaster
{
  public int ID { get; set; }
  public string Type { get; set; } // may be an enum?
  public string Qualification { get; set; }
  public string Achievement { get; set; }
  public int UserID { get; set; }
}

附注：对enum属性使用Type可能更好

public enum AcademicType
{
  Graduation,
  PostGraduation,
  Professional
}

您当前的Graduation，PostGraduation和ProfessionalQualification模型似乎没有必要，您的视图模型应该是

public class AcademicViewModel
{
  public string GraduationQualification { get; set; }
  public string GraduationAchievement { get; set; }
  public string PostGraduationQualification { get; set; }
  public string PostGraduationAchievement { get; set; }
  public string ProfessionalAchievement { get; set; }
  public IEnumerable<SelectListItem> GraduationList { get; set; }
  public IEnumerable<SelectListItem> PostGraduationList { get; set; }
}

附注：不清楚当前ProfessionalQualifications属性是什么 - 是否会将其分配给数据库中的Qualification字段或Acheievement字段？由于您使用的是视图模型，因此它应该包含SelectList，而不是使用ViewBag。

然后你的观点将是

@model AcademicViewModel
@using (Html.BeginForm())
{
  <h2>Graduation</h2>
  @Html.DropDownListFor(m => m.GraduationQualification, Model.GraduationList)
  @Html.TextAreaFor(m => m.GraduationAchievement)
  ... // repeat for PostGraduation and Professional
  <input type="submit" value="Save">
}

POST方法将是

[HttpPost]
public ActionResult MyController(AcademicViewModel model) // should be named Create?
{
  var userID = ....
  AcademicMaster graduation = new AcademicMaster
  {
    Type = AcademicType.Graduation,
    Qualification = model.GraduationAchievement,
    Achievement = model.GraduationAchievement,
    UserId = userID;
  };
  db.AcademicMasters.Add(graduation);
  // Repeat for PostGraduation and Professional
  db.SaveChanges();
  // redirect?
}

如何在控制器上发布模型列表？

1 个答案: