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[英]ViewComponent With CRUD Operations in ASP.NET CORE MVC
[英]Many to Many CRUD operations ASP.Net Core
我有三个表 - 联系人、地址和联系人地址(连接表)。 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; }
}
}
为简单起见,我没有使用存储库模式。
对于创建操作,有两种情况:
对于我们的业务需求,我正在尝试调整第一个,因为用户将在用户点击“保存”按钮时同时填充联系人和地址表。
我该怎么做(在创建两个实体时填充链接实体。),以及如何在更新实体时更新多对多关系? 还有删除操作。
如果您的Guid Id
是在数据库级别生成的(它是在插入后分配的)。 对于您的情况:插入Contact
和Address
并链接它们,您必须先像这样插入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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