asp.net 获取web.config中的连接字符串

比如在web.config中，连接为：

<connectionStrings>
<add name="sosuo8cmsConnectionString" connectionString="Data Source=.;database=sosuo8cms;User ID=sa;Password="
providerName="System.Data.SqlClient" />
</connectionStrings>

那么可以这样调用:

SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["sosuo8cmsConnectionString"].ConnectionString);