Using around DAO Objects
I would like to know if this is a good practice or not.
In our code it is recommended to put using statements around our data access objects.
Most of the time it is in a button event scope anyway, it should just gc correct?
In our code it is recommended to put using statements around our data access objects.
Most of the time it is in a button event scope anyway, it should just gc correct?
if (SOMETHING)
{
using (CustomersDao dao = CustomersDao())
{
//Do something with the object
}
}
else
{
using (CustomersDao dao = CustomersDao())
{
//Do something with the object
}
}
}
WHY NOT
CustomersDao dao;
if (SOMETHING)
{
dao = new CustomersDao();
{
//Do something with the object
}
}
else
{
dao = new CustomersDao();
{
//Do something with the object
}
}
}
ASKER
I guess in a page that could possibly have many of the same object to be sure that gc runs for that scope you would use it. Otherwise if it is a small object and a short visit then dont bother.
I suppose it is a best practice when things get complacated and to ensure the scope of the object.
I suppose it is a best practice when things get complacated and to ensure the scope of the object.
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
When you use the Using Key word it generates a try finally block in the back ground and it calls IDisposable.Dispose() in the finally block. Please note however that it does not generate a catch block
Making Use of Using can however cause issues if IDispoasble.Dispose() is not properly implemeted.
The Using statement is normally used if you want to release resources a soon as possible instead of waiting for the gc to this for you.
Hereis a link for you so that can read up on it: http://msdn.microsoft.com/en-us/library/yh598w02(VS.80).aspx
Your using code above is equivalent to
if (SOMETHING)
{
CustomersDao dao = CustomersDao();
try
{
//Do something with the object
}
finally
{
dao.Dispose();
}
}
else
{
CustomersDao dao = CustomersDao();
try
{
//Do something with the object
}
finally
{
dao.Dispose();
}
}