循环内，循环外实例化对象的效率问题。。
在一个函数体内function aa ()
{
for (int i = 0; i < dataTable.Count; i++)
{
var conn1 = CData.TableAdaptorHelper.GetConnection(DB_SCHEMA);
using (TransactionScope scope1 = new TransactionScope(TransactionScopeOption.RequiresNew))
{
conn1.Open();
A0TableAdapter A0 = new A0TableAdapter()
{
Connection = conn1
};
A0DataTable A0DataTable = new DataSet.A0DataTable();
B0TableAdapter b0 = new B0TableAdapter()
{
Connection = conn1
};
B0DataTable b0DataTable = new DataSet.B0DataTable();
C0TableAdapter c0 = new C0TableAdapter()
{
Connection = conn1
};
C0DataTable c0DataTable = new DataSet.C0DataTable();
D0TableAdapter d0 = new D0TableAdapter()
{
Connection = conn1
};
D0DataTable d0DataTable = new DataSet.D0DataTable();
E0TableAdapter A0 = new E0TableAdapter()
{
Connection = conn1
};
E0DataTable e0DataTable = new DataSet.E0DataTable();
..........
}
}
}
function aa ()
{
var conn1 = CData.TableAdaptorHelper.GetConnection(DB_SCHEMA);
A0TableAdapter A0 = new A0TableAdapter()
{
Connection = conn1
};
A0DataTable A0DataTable = new DataSet.A0DataTable();
B0TableAdapter b0 = new B0TableAdapter()
{
Connection = conn1
};
B0DataTable b0DataTable = new DataSet.B0DataTable();
C0TableAdapter c0 = new C0TableAdapter()
{
Connection = conn1
};
C0DataTable c0DataTable = new DataSet.C0DataTable();
D0TableAdapter d0 = new D0TableAdapter()
{
Connection = conn1
};
D0DataTable d0DataTable = new DataSet.D0DataTable();
E0TableAdapter A0 = new E0TableAdapter()
{
Connection = conn1
};
E0DataTable e0DataTable = new DataSet.E0DataTable();
for (int i = 0; i < dataTable.Count; i++)
{
using (TransactionScope scope1 = new TransactionScope(TransactionScopeOption.RequiresNew))
{
conn1.Open();
..........
}
}
}
两种方法实列化效率上有啥区别哇》？？？ 请教各位。。。。
--------------------编程问答-------------------- 循环内，实例一次又一次 --------------------编程问答--------------------
但是只是在循环体内有效， 出了循环体那个变量就不存在了啊，只是内存有没有及时回收，不是很清楚。。。
--------------------编程问答-------------------- 你把这段也放到循环外就可以了：
using (TransactionScope scope1 = new TransactionScope
--------------------编程问答--------------------
额，这个是我的疏忽， 效率上是不是放在循环体外效率高的多？
--------------------编程问答-------------------- 都一样吧，都要创建新的对象，对象不用，就抛弃了，但是等待垃圾回收 --------------------编程问答-------------------- 但是你这种写法，放到循环外边，就是一个对象，循环内，就是多个对象了，放到循环外边好 --------------------编程问答-------------------- --------------------编程问答-------------------- 自己运行下比较下时间就知道了。应该差别不大。
补充：.NET技术 , C#
