mysql transaction (commit and rollback)

Question

below is the code i am using for MySqlTransaction and it is running perfectly.... but problem is as i am using single instance of mysqlcommand i have to use unique PARAMETER

Answer 1

To execute multiple commands within the same transaction, ensure that you assign the transaction object to each command individually:

Dim selectCmd As MySqlCommand = con.CreateCommand()
Dim insertCmd As MySqlCommand = con.CreateCommand()

selectCmd.CommandText = "SELECT ..."
insertCmd.CommandText = "INSERT ..."

Dim sqlTran As MySqlTransaction = con.BeginTransaction()
Try
  selectCmd.Transaction = sqlTran
  insertCmd.Transaction = sqlTran

  ...selectCmd.ExecuteScalar()...
  ...insertCmd.ExecuteNonQuery()...

  sqlTran.Commit()
Catch
  sqlTran.Rollback()
End Try

As others have mentioned, it is generally a good idea to Dispose() objects (that are IDisposable) as soon as you're done working with them. After disposing objects, they can no longer be used.