ado.net 学习小结

连接数据源

Connection对象。Connection对象处于最顶层，是所有数据访问请求的关口。我们通过其暴露的属性进行配置。下面是一段连接字符串的示例。

 

 1 if (string.IsNullOrEmpty(con.ConnectionString))
 2             {
 3                 con.ConnectionString = "Data Source=localhost\\sql08; Initial Catalog=ado_test;user ID=sa;password=test;";// Integrated Security=SSPI
 4             }
 5 
 6             if (con.State != ConnectionState.Open)
 7             {
 8                 con.Open();
 9             }
10             if (con.State == ConnectionState.Open)
11                 lbConnect.Text = "CONNECTED NOW!";

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