是否是使用的时候打开,使用完了就关闭? 我在做数据库操作的时候,有一些较为复杂的查询语句,发现我一直打开数据库连接的时候,读数的效率更高. 如果是要使用的时候重新打开,用完后再关闭,读数的速度实在让我受不了.....非常的迷惑.

Microsoft would like you to use ADO to access your data, but is it the right solution for you? Follow along with our step-by-step example to learn more about this technology and see what advantages ...

Learn how to turn ADO.NET classes into tools for constructing software using C# in Mahesh Chand's book, A Programmer's Guide to ADO.NET in C#. The majority of software developed for business relies ...