ASP.net如何连接SQL SERVER 2012数据库

<connectionStrings>
<add name="SQLConnectionString" connectionString="Data Source=服务器名;Initial Catalog=数据库名;Integrated Security=True"
providerName="System.Data.SqlClient" />
</connectionStrings>

//获取数据库连接字符串
public static string connString = ConfigurationManager.ConnectionStrings["SQLConnectionString"].ConnectionString;