问题
Should you always close a DataReader before closing the connection, or is it okay to just close the connection? By just closing the connection does that effectively close the reader?
(This is for c#.net 3.5)
Thanks!
回答1:
Aside from making your intent clear, there is this from the Microsoft documentation (Retrieving Data Using a DataReader (ADO.NET)):
You should always call the Close method when you have finished using the DataReader object.
回答2:
Close the DataReader as well.
imo. if it implements IDisposable , or has a .close() method or a similar construct that the documentation states you should call when you're done with this instance - do it. Don't rely on something else to take care of it for you - unless the documentation explicitly states that it does. For a DataReader/DbConnection - the docs doesn't mention anything like this.
回答3:
I prefer to leverage the c# using statment which will call dispose() for you. Here is a decent explanation.
Using Statment
来源：https://stackoverflow.com/questions/2519379/close-reader-before-closing-connection