| rity is secure when you are on a single machine doing development. However, you will often want to specify security based on a SQL Server User ID with permissions set specifically for the application you are using. The following shows a connection string, using the User ID and Password parameters:
当你在一个独立的机器上面做开发的时候，集成安全是安全的。然而，你通常希望指明所使用的应用程序的基于SQL Server用户ID的安全许可。下面显示的连接字符串使用了User ID和Password参数：
SqlConnection conn = new SqlConnection(
"Data Source=DatabaseServer;Initial Catalog=Northwind;User ID=YourUserID;Password=YourPassword");
Notice how the Data Source is set to DatabaseServer to indicate that you can identify a data base located on a different machine, over a LAN, or over the Internet. Additionally, User ID and Password replace the Integrated Security parameter.
注意Data Source被设置为DatabaseServer来指示你能够指明位于不同机器――跨局域网或者Internet――的数据库。另外，User ID和Password替换调了集成安全参数。
Using a SqlConnection
使用SqlConnection
The purpose of creating a SqlConnection object is so you can enable other ADO.NET code to work with a data base. Other ADO.NET objects, such as a SqlCommand and a SqlDataAdapter take a connection object as a parameter. The sequence of operations occurring in the lifetime of a SqlConnection are as follows:
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