.NET MySql执行"使用"会关闭datareader吗？

Question

我曾经使用try/catch/finally块关闭一个打开的datareader:

 Dim dr As MySqlDataReader = Nothing
 Try
   dr = DBConnection.callReadingStoredProcedure("my_sp")

 Catch ex As Exception
   ' the caller will handle this
   Throw ex
 Finally
   If dr IsNot Nothing Then dr.Close()
 End Try

但我认为使用"Using"VB关键字应该更干净(并且更快):

Using dr As MySqlDataReader = DBConnection.callReadingStoredProcedure("my_sp")

End Using
'   dr is surely disposed, but is it closed? 

IDispose接口(使用时需要)是否在DataReader上执行关闭？

Answer 1

该物件将被处置.是的,这会关闭DataReader.