Question

我相信我有正确的方法但是，我无法让它发挥作用。我正在使用代码第一种方法。我有三张桌子。接下来，我为Build-Inspection创建了一个视图模型。根据类别是否包装或检查，检查和包装表都是可插入的可选表格。我的观点不会显示。为什么会这样？为什么我没有错误？

 public class Build
{
    public int BuildID { get; set; }
    // order of each individual step
    public int BuildStep { get; set; }

    public string Category { get; set; }

    public string SubCategory { get; set; }

    public string Details { get; set; }

    public string AdditionalNotes { get; set; }

    public DateTime? Date { get; set; }

    public int? Weight { get; set; }

    public Inspection Inspection { get; set; }
    public Packaging Packaging { get; set; }
}

包装表

      public class Packaging
       {
    public int PackagingID { get; set; }
    public int MaxWeight { get; set; }

    public int? MINWeight { get; set; }
    public int? MAXWidth { get; set; }
    public int? MaxHeight { get; set; }

    public int BuildID {get; set;}
    public Build Build { get; set; }
}

检查表

  public class Inspection
 {
  public int InspectionID {get; set;}
  public int Type  {get; set;}
  public int TensileMAX {get; set;}

  public int BuildID {get; set;}
  public Build Build { get; set; }
 }

查看构建检查模型

   public class BuildInspectionViewModel
  {
public int BuildStep { get; set; }

public string Category { get; set; }

public string SubCategory { get; set; }

public string Details { get; set; }

public string AdditionalNotes { get; set; }

public DateTime? Date { get; set; }

public int? Weight { get; set; }

public int Type  {get; set;}

public int TensileMAX {get; set;}

}

接下来我制作了一个控制器，它应该能够使用视图

插入到两个表中

    //grabbing my db context or my database
    private readonly DataContext _context;

    public BuildController(DataContext context)
    {
        _context = context;
    }

   [HttpPost]
    public ActionResult Create(BuildPackagingViewModel viewModel)
    {
        Build build = new Build()
        {
            BuildStep = viewModel.BuildStep,
            Category = viewModel.Category,
            SubCategory = viewModel.SubCategory,
            Details = viewModel.Details,
            AdditionalNotes = viewModel.AdditionalNotes

        };

        Inspection inspection = new Inspection()
        {
            Type = viewModel.Type,
            TensileMax = viewModel.TensileMax,

        };

              _context.Build.Add(build);
               inspection.BuildID = build.BuildID;
              _context.Inspection.Add(inspection);
              _context.SaveChanges();



        return View();

然后我做了一个视图，这样我就可以插入检查和构建表。

     @model DemoOnMVVM.Models.ViewModels.BuildInspectionViewModel

 @{
      ViewBag.Title = "Index";
  }

  <h2>Index</h2>
    <form asp-controller="BuildInspection" asp-action="Create" method="post" 
    class="form-horizontal" role="form">

<fieldset>
    <legend> BuildInspectionViewModel </legend>

    <div class="editor-label">
        @Html.LabelFor(model => model.BuildStep)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.BuildStep)
        @Html.ValidationMessageFor(model => model.BuildStep)
    </div>

       <div class="editor-label">
        @Html.LabelFor(model => model.Category)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.Category)
        @Html.ValidationMessageFor(model => model.Category)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.SubCategory)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.SubCategory)
        @Html.ValidationMessageFor(model => model.SubCategory)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.Details)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.Details)
        @Html.ValidationMessageFor(model => model.Details)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.AdditionalNotes)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.AdditionalNotes)
        @Html.ValidationMessageFor(model => model.AdditionalNotes)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.Weight)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.Weight)
        @Html.ValidationMessageFor(model => model.Weight)
    </div>

        <div class="editor-label">
        @Html.LabelFor(model => model.Type)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.Type)
        @Html.ValidationMessageFor(model => model.Type)
    </div>

        <div class="editor-label">
        @Html.LabelFor(model => model.TensileMax)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.TensileMax)
        @Html.ValidationMessageFor(model => model.TensileMax)
    </div>
<p>
        <input type="submit" value="Create" />
    </p>
</fieldset>

这是我用来搭建数据库的DataContext

    public class DataContext : DbContext
{

  public DataContext(DbContextOptions<DataContext> options) : base(options)
       {

    }
    public DbSet<Packaging> Packaging { get; set; }
    public DbSet<Build> Build { get; set; }
    public DbSet<Inspection> Inspection { get; set; }

protected override void OnModelCreating(ModelBuilder modelBuilder)
    {

        modelBuilder.Entity<Inspection>().ToTable("Inspection");
        modelBuilder.Entity<Build>().ToTable("Build");
        modelBuilder.Entity<Packaging>().ToTable("Packaging");
    }
}

这是我的startup.cs文件

public void ConfigureServices(IServiceCollection services)
    {

        services.AddMvc();
        services.AddDbContext<DataContext>(options =>

options.UseSqlServer(Configuration.GetConnectionString("DataContext")));

appsettings.json文件

  {
   "ConnectionStrings": {
    "DataContext": "Mysqlserverconnection"
  },

总的来说，我不确定为什么我的观点不会显示。我只使用代码第一种方法搭建包装，构建和检查表。以下是我的资源链接。

（Best way to insert data to multiple table MVC ASP）

（https://docs.microsoft.com/en-us/ef/core/miscellaneous/configuring-dbcontext）

将数据插入多个表的最佳方法ASP.NET CORE？

0 个答案: