This thread is for discussions of New Object-Oriented Capabilities in VB.NET.

If you set a shared property of a user class in a ASP.NET application, how long wil the value last? Application level? Session level? Page level? Well i was actually looking for an answer to that when i got here...  useful article anyway even though it doesn't answer my question...

I need a global variable; but it is a "XmlDocument" object, does anybody know how do I have to create it, and how to initialitze it?

boig,

I needed the same thing and found that I have it working using the Public Shared declaration on the class that contains my XMLDocument and the functions to access the document.  This makes the class available across the application.

Public Shared  oTriggers As Triggers

If you only need the XMLDocument I would give that a try.

Hope this helps.

How do we read the attributes in an XML file using a DataSet?

Error in the article "New Object-Oriented Capabilities in VB.NET - Events"

Derived classes cannot raise base class events in VB.Net. Handle them sure, but not raise them - even if they are declared public. In order to achieve this handle the base class event and raise a derived class event instead.

B.

Quote:

[1]Posted by bsol on 19 Mar 2004 04:06 PM[/1]
Error in the article "New Object-Oriented Capabilities in VB.NET - Events"

Derived classes cannot raise base class events in VB.Net. Handle them sure, but not raise them - even if they are declared public. In order to achieve this handle the base class event and raise a derived class event instead.

B.

While it is true that VB.NET cannot directly raise events in base classes from a derived class, there is an easy workaround. BTW, in C# you can simply call an event in a base class like: base.onMyEventName(EventArgs e).

But in VB.NET you cannot use MyBase.EventName() at all. But the workaround is an easy one.
1) In the base class add an overridable sub that simply raises an event defined in the base class.


Public MustInherit Class MyClass

 Protected Event MyEventName(ByVal e as EventArgs)

 Protected Overridable Sub OnMyEventName(ByVal e as EventArgs)
     Raiseevent MyEventName(e)
 End Sub

End Class

2) In the derived class make a call to the overridable method: Me.OnMyEventName(New EventArgs). It's really just that easy. Do it all the time.

Have Fun....

application level