如何复制一行数据链接到其他表（相关）并将它们作为新记录插入 - Linq C#

Question

如何复制与其他 table 中链接的数据的行（相关）并将它们作为新记录插入所有表中，使用 :

ASP.NET MVC/C#/Linq（方法语法）/Entity Framework代码优先

例如：

我有这些 tables =>

我想复制"Customer"的最后一行table并在数据库的新行中添加一个新的ID，同时复制"Customer"中所有相关的订单table "Order" 并使用新 ID 的 "Customer" 的 "CustoemerID" 复制它们，同时复制 table [=41= 中的所有订单行] 并用新的 "OrderID"

复制它们

怎么做？

是否有执行此操作的简短代码？

The blue color is the last row in the database, and the green color is the result of the code what i'm looking for, a duplicate copy of the customer and his related data

主键：CustomerID & OrderID & OrderLineID = AUTO INCREMENT Field

Answer 1

看看这是否对你有帮助：

INSERT INTO customer (ID, Name, Address1, Address2, Address3) 
    SELECT 
        3, Name, Address1, Address2, Address3 
    FROM
        customer 
    WHERE
       ID = 2;

INSERT INTO Order (CustomerId, TotalAmount) 
    SELECT CustomerId, TotalAmount 
    FROM Order 
    WHERE CustomerID = 3;

INSERT INTO OrderLine (OrderId, ProductId, Quantity) 
    SELECT ol.OrderId, ol.ProductId, ol.Quantity 
    FROM OrderLine ol 
    WHERE ol.OrderId IN (SELECT o2.OrderId 
                         FROM Order o2 
                         WHERE o2.CustomerID = 3);

Answer 2

这个问题我能想出2种解法

使用Sql查询
首先使用 EF 代码，您可以在客户内部创建一个克隆方法 class。

  CREATE TABLE #Customer (
  CustomerId INT Identity(1, 1)
  ,Name NVARCHAR(100)
  ,Address1 NVARCHAR(100)
  ,Address2 NVARCHAR(100)
  ,Address3 NVARCHAR(100)
  )

INSERT INTO #Customer
VALUES (
  'N2'
  ,'A11'
  ,'A22'
  ,'A33'
  )

INSERT INTO #Customer
SELECT Name
  ,Address1
  ,Address2
  ,Address3
FROM #Customer
GROUP BY Name
  ,Address1
  ,Address2
  ,Address3
HAVING Count(*) BETWEEN 0
      AND 1

使用克隆方法

   public class Customer
    {
        public int CustomerId { get; set; }
        public string Name { get; set; }
        public string Address1 { get; set; }
        public string Address2 { get; set; }
        public string Address3 { get; set; }


        public Customer Clone()
        {
            // where the reference is not detached
            var employee1 = new Customer
            {
                Name = Name,
                Address1 = Address1,
                Address2 = Address2,
                Address3 = Address3
            };

            // with reference detached
            var serialisedData = JsonConvert.SerializeObject(this);
            var employee2 = JsonConvert.DeserializeObject<Employee>(serialisedData);

            //  return employee1 or employee2;
            return employee1;

        }
    }

如何复制一行数据链接到其他表（相关）并将它们作为新记录插入 - Linq C#

How to copy a row with his data linked in other tables (related ) and insert them as a new records - Linq C#

c#

linq

asp.net-mvc

entity-framework

ef-code-first