Identity column insert not working when bulk copying using c#

Question

I have a SOURCE table as below in Prod:

    SELECT '-1' as PKey, NULL as ID, 'Unknown' as Name
    UNION
    SELECT '1' as PKey, 01 as ID, 'ABC' as Name
    UNION
    SELECT '2' as PKey, 02 as ID, 'XYZ' as Name

I want to replicate (move) it to DEV environment. For this I have a Foreach loop container with following three tasks:

1) Identity_Insert ON: Checks if the table has any identity column or not, if Yes, then set it to ON (I have tested this and it works)

2) Script_task_1: This uses the following code to move the data from PROD to DEV

    try{
        string connectionString =
                @"Data Source=Prod_Server;Initial Catalog=Source_DB;Integrated Security=SSPI;";
        // get the source data
        using (SqlConnection sourceConnection =
                new SqlConnection(connectionString))
        {
            SqlCommand myCommand =
                new SqlCommand("SELECT * FROM " + TableName, sourceConnection);
            sourceConnection.Open();
            SqlDataReader reader = myCommand.ExecuteReader();

            // open the destination data
            string connectionString1 = @"Data Source=Dev_Server;Initial Catalog=Dest_DB;Integrated Security=SSPI;";

            using (SqlConnection destinationConnection =
                        new SqlConnection(connectionString1))
            {
                // open the connection
                destinationConnection.Open();

                using (SqlBulkCopy bulkCopy =
                new SqlBulkCopy(destinationConnection.ConnectionString, SqlBulkCopyOptions.KeepNulls & SqlBulkCopyOptions.KeepIdentity))
                {
                    bulkCopy.BatchSize = 500;
                    bulkCopy.NotifyAfter = 1000;
                    bulkCopy.SqlRowsCopied +=
                        new SqlRowsCopiedEventHandler(OnSqlRowsCopied);
                    bulkCopy.DestinationTableName = TableName;
                    bulkCopy.WriteToServer(reader);
                }
            }
            reader.Close();
            //MessageBox.Show("Data copied successfully!!");
        }
        }
            catch(Exception E){
                Console.WriteLine(E.Message);
            }

3) Identity_Insert OFF: Checks if the table has any identity column or not, if Yes, then set it to OFF

After this process..My destination table is looking like this:

    SELECT '1' as PKey, NULL as ID, 'Unknown' as Name
    UNION
    SELECT '2' as PKey, 01 as ID, 'ABC' as Name
    UNION
    SELECT '3' as PKey, 02 as ID, 'XYZ' as Name

So, it is copying the data properly, but the Identity field for the root record is not replicating. instead of being -1, it is starting at 1.

Does anyone have an idea what am I doing wrong here?

Answer 1

我相信您希望查看批量插入书籍在线文档的KeepIdentity部分。