110,539
社区成员
发帖
与我相关
我的任务
分享
string strCon = ConfigurationManager.ConnectionStrings["con"].ConnectionString;
using (SqlConnection sqlconnection = new SqlConnection())
{
sqlconnection.ConnectionString = strCon;
sqlconnection.Open();
//do sth
}
////////////////////////////////////////////////////////////////////////////分割线
using (SqlConnection connection = new SqlConnection("con"))
{
connection.Open();
//do sth
}
using (SqlConnection connection = new SqlConnection("con"))
{
connection.Open();
//do sth
}
string strCon = ConfigurationManager.ConnectionStrings["con"].ConnectionString;
//为什么要这样写啊?string strCon和"con"有区别吗?