Passing object byval to function to Dispose?

I am passing anobject toa common function to dispose it.

Public Shared Sub ReleaseObject(ByVal reader As SqlDataReader)

  If Not IsNothing(reader) Then
   If Not reader.IsClosed Then
    reader.Close()
   End If
   reader = Nothing
  End If
 End Sub

Since I am passing thereaderobject byVal to this function. Iam still able to accessreader object in my calling class after my call to ReleaseObject.

calling code

ReleaseObject(rd)
';;
'just to check the object is disposed
debug.write (rd.Depth.ToString)
';;

I know following thing about parameter passing.
Reference Type.
1. If you pass ByVal you are creating a copy of the pointer to the object in the stack. both pointers point to a single instance of the object in the heap.

2. If you pass ByRef, you are using the original pointer in the stack.

Value Type
3. If you pass ByVal , you are creating a copy of the variable in the stack. (changes will not affect original variable)

4. If you pass ByRef, you are using the original value in the stack. ( changes will affect original variable)

I also know that setting a objectto nothing, will not release any memory
It justhelper the developer ... by throwing an exception if he used those object after disposing

My Question is whether it has any performance or memory issue in passing an object to dispose to a function by value?

like

dim r as new sqlDataReader
ReleaseObject(r)
'object is passed by value, i can still use
debug.write (r.depth)

Any thoughts will be helpful.

Thank you
Riju K K

Passing object byval to function to Dispose?

You can use google to search for other answers

More Threads