Re: question about public function
- From: "Scott M." <s-mar@xxxxxxxxxxxxx>
- Date: Sun, 25 Feb 2007 10:36:13 -0500
Gee, I thought that is exactly what I said....
I indicated that a page is a class -
...while the page (class)...
And, loaded isn't really confusing at all, as I pointed out that this is
while "the page is being requested". Instances of classes are "loaded" into
the heap and assigned a pointer. While they have a pointer, they can be
accessed by your code. When the no longer have a pointer (like when the
page request is completed and the page response is loaded), they are the
GC's responsibility. They may still exist in memory (the heap) for some
period of time, but since the pointer to the object is gone, you can't get
to that particular instance of the object again.
Your last recommendation, "extract this method to a different object and use
that object from all pages" is exactly what I said, but more clearly, when I
indicated that the function could be placed inside of a class in a separate
..dll and then referenced and instantiated.
-Scott
"Laurent Bugnion [MVP]" <galasoft-lb@xxxxxxxxxx> wrote in message
news:%23Hm$bwMWHHA.496@xxxxxxxxxxxxxxxxxxxxxxx
Hi,
Scott M. wrote:
The function is only available while that page (class) is loaded, which
is only while the page is being requested.
Actually, a Page is an object like any other. "loaded" is a bit confusing
in this context.
When the request arrives, an instance of the corresponding Page is
created. The instance is disposed after the Response is sent. On the next
Request, another, brand new instance of the Page is created. This explains
why you cannot save instance variables over requests, but must resort to
Session, Cache, Application objects...
However, if you have a public method in a class deriving from Page, you
can use that method at any time simply by creating a new instance of that
Page:
MyOwnPage anInstance = new MyOwnPage();
anInstance.executeSomething();
However, I wouldn't recommend this. If you have a public method that is
used in multiple pages, extract this method to a different object and use
that object from all pages. It's all abut design ;-)
HTH,
Laurent
You could place a function like this (along with other functions you wish
to call repeatedly) in their own assembly (.dll) and then just reference
that assembly from your ASP.NET project, make an instance of the class
that contains them and run them as you need to.
"Gilbert" <gi@xxxxxxx> wrote in message
news:OsuiHxGWHHA.5108@xxxxxxxxxxxxxxxxxxxxxxx
Hi,
In the code-behind, i have this function:
Public Function myfunction(ByVal myvar As Object) As String
dim x as string = myvar
.....
Return x
End Function
My question is: can i use this function in other aspx / code-behind
pages of my application? Or, till where is this function accessible?
thanks
Gilbert
--
Laurent Bugnion [MVP ASP.NET]
Software engineering, Blog: http://www.galasoft-LB.ch
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