Razor Pages - 一对多关系

Question

我正在尝试呈现一对多关系，但总是出现错误，无法继续。如果有人能找出错误，非常感谢。最后objective是在Villastable中选择一个记录，并且能够关联另一个table中的记录。谢谢

using Microsoft.EntityFrameworkCore;

namespace LeisureVillas.RazorPages.Models
{
    public class VillaStatAContext : DbContext
    {
        public DbSet<StatementA> Tbl_Statement_Autos { get; set; }
        public DbSet<Villa> Tbl_Villas { get; set; }
        public VillaStatAContext(DbContextOptions<VillaStatAContext> options) : base(options)
        {
        }
        #region Required
        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
           modelBuilder.Entity<Villa>()
               .HasMany<StatementA>(s => s.StatementAs)
               .WithOne(p => p.Villas)
               .HasForeignKey(s => s.Stat_A_Villas);
            #endregion
        }
    }
}

using LeisureVillas.RazorPages.Models;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc.RazorPages;
using System.Collections.Generic;
using System.Linq;

namespace LeisureVillas.RazorPages.Pages
{
    [Authorize(Roles = "Manager")]
    public class VillaStatementA : PageModel
    {
        private readonly VillaStatAContext db = null;

        public List<Villa> Villas { get; set; }
        public List<StatementA> StatementAs { get; set; }

        public void OnGet()
        {
            this.Villas = (from e in db.Tbl_Villas orderby e.Vill_Name select e).ToList();
        }
    }
}

Answer 1

使用评论中提到的依赖注入：

[Authorize(Roles = "Manager")]
public class VillaStatementA : PageModel
{
    private readonly VillaStatAContext _db;

    public VillaStatementA(VillaStatAContext db)
    {
        _db = db;
    }

    public List<Villa> Villas { get; set; }
    public List<StatementA> StatementAs { get; set; }

    public void OnGet()
    {
        this.Villas = (from e in db.Tbl_Villas orderby e.Vill_Name select e).ToList();
    }
}

Answer 2

@page
@model VillaStatementA
<h3>Suppliers Automatic</h3>
<div class="flex-cont">
    <div class="flex-item-left">
        <font size="2" face="Courier New">
            <table>
                <tr>
                    <th style="display:none;" bgcolor="#5D7B9D"><font color="#fff">ID</font></th>
                    <th bgcolor="#5D7B9D"><font color="#fff">Code</font></th>
                    <th bgcolor="#5D7B9D"><font color="#fff">Customer Name</font></th>
                    <th bgcolor="#5D7B9D"><font color="#fff">Address</font></th>
                    <th bgcolor="#5D7B9D"><font color="#fff">Location</font></th>
                </tr>
                @foreach (var item in Model.Villas)
                {
                    <tr>
                        <td style="display:none;">@item.Vill_ID </td>
                        <td>@item.Vill_Code</td>
                        <td>@item.Vill_Name</td>
                        <td>@item.Vill_Address</td>
                        <td>@item.Vill_Location</td>
                    </tr>
                }
            </table>
        </font>
    </div>
    <div class="flex-item-right">2</div>
    <font size="2" face="Courier New">
        <table>
            <tr>
                <th style="display:none;" bgcolor="#5D7B9D"><font color="#fff">ID</font></th>
                <th bgcolor="#5D7B9D"><font color="#fff">Villa</font></th>
                <th bgcolor="#5D7B9D"><font color="#fff">Amount Débit</font></th>
               <th bgcolor="#5D7B9D"><font color="#fff">Memo</font></th>
            </tr>
            @foreach (var item in Model.StatementAs)
            {
                <tr>
                    <td style="display:none;">@item.Stat_A_Id</td>
                    <td>@item.Stat_A_Villas</td>
                    <td>@item.Stat_A_Amount_Debt</td>
                    <td>@item.Stat_A_Memo</td>
                </tr>
            }
        </table>
    </font>
</div>

Razor Pages - 一对多关系

Razor Pages - Relationship One-To-Many

c#

entity-framework

asp.net-core

entity-relationship

razor-pages