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[英]ViewComponent With CRUD Operations in ASP.NET CORE MVC
[英]Many to Many CRUD operations ASP.Net Core
我有三個表 - 聯系人、地址和聯系人地址(連接表)。 以下是表格:
using System;
using System.Collections.Generic;
namespace ProjectWayneAPI.Models
{
public partial class Contact
{
public Guid Id { get; set; }
public DateTime? DateEntered { get; set; }
public bool? Deleted { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string PhoneHome { get; set; }
public string Email { get; set; }
public virtual ICollection<ContactAddress> ContactAddress { get; set; }
}
}
using System;
using System.Collections.Generic;
namespace ProjectWayneAPI.Models
{
public partial class Address
{
public Guid Id { get; set; }
public DateTime? DateCreated { get; set; }
public DateTime? DateModified { get; set; }
public string Lot { get; set; }
public string Road { get; set; }
public string Street { get; set; }
public string Suburb { get; set; }
public string City { get; set; }
public string State { get; set; }
public string Postcode { get; set; }
public string Country { get; set; }
public string Latitude { get; set; }
public string Longitude { get; set; }
public bool? Deleted { get; set; }
public virtual ICollection<ContactAddress> ContactAddress { get; set; }
}
}
using System;
using System.Collections.Generic;
namespace ProjectWayneAPI.Models
{
public partial class ContactAddress
{
public Guid Id { get; set; }
public DateTime? Created { get; set; }
public bool? Deleted { get; set; }
public Guid? ContactId { get; set; }
public Guid? AddressId { get; set; }
public virtual Address Address { get; set; }
public virtual Contact Contact { get; set; }
}
}
為簡單起見,我沒有使用存儲庫模式。
對於創建操作,有兩種情況:
對於我們的業務需求,我正在嘗試調整第一個,因為用戶將在用戶點擊“保存”按鈕時同時填充聯系人和地址表。
我該怎么做(在創建兩個實體時填充鏈接實體。),以及如何在更新實體時更新多對多關系? 還有刪除操作。
如果您的Guid Id
是在數據庫級別生成的(它是在插入后分配的)。 對於您的情況:插入Contact
和Address
並鏈接它們,您必須先像這樣插入Contact
和Address
:
var contact = new Contact();
var address = new Address();
dbContext.Add(contact);
dbContext.Add(address);
dbContext.SaveChanges();
var contactAddress = new ContactAddress()
{
AddressId = address.Id,
ContactId = contact.Id
}
dbContext.Add(contactAddress);
dbContext.SaveChanges();
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