473,474 Members | 1,304 Online
Bytes | Software Development & Data Engineering Community
Create Post

Home Posts Topics Members FAQ

Scope of an event handler?

I'm in the process of defining a very complex data model that consists of
dozens & dozens of properties. To keep things better organized I've decided
to embed some classes within the main class, such as this:

public class MainClass
{
public class SubClass
{
Nov 17 '05 #1
1 2077
Robert W. <Ro*****@discussions.microsoft.com> wrote:
I'm in the process of defining a very complex data model that consists of
dozens & dozens of properties. To keep things better organized I've decided
to embed some classes within the main class, such as this:

public class MainClass
{
public class SubClass
{
.
.
This works fine but yet when I define an EventHandler at the topmost level
(ie. just inside the MainClass) I can't seem to access it from the SubClass.
Here's the syntax I used:

public event System.EventHandler ModelEvent;
I was expecting to be able to access it from anywhere in the class. Any
idea why I can't?


Yes - because you need an instance of the main class to handle an event
for. Having an instance of SubClass doesn't give you an instance of
MainClass automatically. (It's not like Java's inner classes, it's like
Java's static nested classes.)

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
Nov 17 '05 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

7
by: Pavils Jurjans | last post by:
Hallo, I have been programming for restricted environments where Internet Explorer is a standard, so I haven't stumbled upon this problem until now, when I need to write a DOM-compatible code. ...
1
by: Dark Magician | last post by:
Comrades: Am trying to build a UI widget. I'm sure part of the problem is proper variable scope or object reference, and part of the problem may be the way I'm calling the function, but, here...
1
by: Grant | last post by:
The Idea: Page1.aspx sets a property value to an arraylist. Page2.aspx retreives that property (using a Context.Handler) every time the page loads. It then iterates through the arraylist and...
3
by: Daniel Bass | last post by:
where szStartDate, szEndDate, szStatus, szMsgType, szClient, szFilter are all strings declared and containing data as this code executes... ' hook up a refresh event to the refresh button Dim...
2
by: George | last post by:
I'm having a weird problem. When I double-click a Web server control that I have on my design-time Web form, such as a button, it puts the event handler in the Code Behind as a Private Sub...
2
by: Carlos | last post by:
Hi all, I just tried to use a static variable within the scope of the page_load event handler, but apparently it did not work all I wanted to do is to evaluate the postback condition and...
2
by: Ralph | last post by:
Hi I don't understand why it's not working: function schedule(imTop){ this.tdImagesTop = imTop; } schedule.prototype.selectEl = function() { alert(this.tdImagesTop);
4
by: parsifal | last post by:
Hi everyone :-) In my Page_Load, I create a control, and do an AddHandler on it (VB.NET). The button is created and displayed, and does cause a postback, but the event handler isn't fired. ...
4
by: Enkidu | last post by:
I've not much experience of C#, so maybe someone can help me with this little problem? I've discovered that an event handler seems to be able to call methods in its own class, but not in other...
0
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
0
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
0
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...
0
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
1
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...
0
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...
0
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing,...
0
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
0
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated ...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.