SqlBulkCopy insert order

Question

To copy data from one database to another in different server with same schema, I am planning to use SqlBulkCopy class from C sharp library. Whether SqlBulkCopy will maintain the same order as it is in the datatable while inserting the records ?

Example: id is the identity column.

Server1, db1

TableA
id   name
1    name10
2    name20
3    name30
4    name40

Server2, db1

TableA
    id   name
    1    name1
    2    name2
    3    name3
    4    name4
    ..........
    ..........
    5000 name22
    5001 name33

• Step1: var dt = select * from server1.dbo.TableA order by id;
• Step2: SQL bulk copy into server2 bulkCopy.WriteToServer(dt);
• Step3: var resultDt = select top 4 id from server2.dbo.TableA order by id desc. Since we know the number of records we inserted I am using "top 4".
• Step4: resultDt.DefaultView.Sort = "id asc";

Question: Whether id in resultDt will represent id in dt for all the rows ? i.e,.

5002 from server2 = 1 from server1
5003 from server2 = 2 from server1
5004 from server2 = 3 from server1
5005 from server2 = 4 from server1

Note: Just for example purpose I have given less records. Actual table contains some thousands of records.

Answer 1

看来批量插入时无法保证订单。所以我在目标表中添加了一个临时id列。流程如下：

Step1: var dt = select *, id as tempId from server1.dbo.TableA order by id;
Step2: SQL bulk copy into server2 bulkCopy.WriteToServer(dt);
Step3: var resultDt = select top 4 id, tempId from server2.dbo.TableA order by id desc. Since we know the number of records we inserted I am using "top 4".

现在id将是server2生成的新id，tempId将是server1的id。问题解决了:)）

Answer 2

另一种解决方案可在以下链接中找到：

https://social.msdn.microsoft.com/Forums/en-US/ee3d90b0-d212-4bf0-8f2a-5dcb716896eb/sqlbulkcopy-insert-order?forum=adodotnetdataproviders

• 使用与tableA相同的结构创建临时表（比如tmp_tableA） 没有身份。
• 将数据批量复制到tmp_tableA。
• 现在从tmp_tableA插入tableA。