This webinar discusses:
-Common barriers companies experience when moving to the cloud
-How SD-WAN changes the way we look at networks
-Best practices customers should employ moving forward with cloud migration
-What happens behind the scenes of SteelConnect’s one-click button
Course Of The Month
2 days, 9 hours left to enrollBecome a Premium Member and unlock a new, free course in leading technologies each month.
Solved
Moving from Event Handlers in vb.net to c#.net
Posted on 2009-06-30
Okay, I've finally given up on trying to do this. I only recently learnt to do it in vb.net and found it really useful. Translating that to C# is proving to be an absolute nightmare.
What I had in vb.net was this. A class that inherited and extended the data table class called xDataTable.
One of the main features of this extension is that the base data table will populate itself from a SQL server database if a populated SQLCommand is given to it.
I then added an event to the xDataTable which fired whenever the base data table was populated. Trying to do this in C# is proofing to be my worst nightmare. Can anyone help please.
Summary:
Class xDataTable will contain an event called hasData
Form fEditor should then add a handler to use this event.
Please could someone help and stop me from going back to vb
Thanks.
What I had in vb.net was this. A class that inherited and extended the data table class called xDataTable.
One of the main features of this extension is that the base data table will populate itself from a SQL server database if a populated SQLCommand is given to it.
I then added an event to the xDataTable which fired whenever the base data table was populated. Trying to do this in C# is proofing to be my worst nightmare. Can anyone help please.
Summary:
Class xDataTable will contain an event called hasData
Form fEditor should then add a handler to use this event.
Please could someone help and stop me from going back to vb
Thanks.
[X]
Welcome to Experts Exchange
Add your voice to the tech community where 5M+ people just like you are talking about what matters.
- Help others & share knowledge
- Earn cash & points
- Learn & ask questions
2-
2
4 Comments
Active 3 days ago
Hi,
If you have a class xDataTable you should create a delegate like so
// Create Event
public delegate void HandleData();
public class xDataTable {
public event HandleData hasData
public void Fire() {
hasData();
}
}
//Register Event in Form
class registerEvent {
xDataTable xdata = new xDataTable();
ImplementationEvent myImpl = new ImplementationEvent();
xdata.hasData += new HandleData(myImpl.DoSometh
}
//Register Event in Form
class ImplementationEvent {
public void DoSomething() {
console.WriteLine("EventFi
}
}
Hope this helps,
Darren
If you have a class xDataTable you should create a delegate like so
// Create Event
public delegate void HandleData();
public class xDataTable {
public event HandleData hasData
public void Fire() {
hasData();
}
}
//Register Event in Form
class registerEvent {
xDataTable xdata = new xDataTable();
ImplementationEvent myImpl = new ImplementationEvent();
xdata.hasData += new HandleData(myImpl.DoSometh
}
//Register Event in Form
class ImplementationEvent {
public void DoSomething() {
console.WriteLine("EventFi
}
}
Hope this helps,
Darren
Thanks very much for your reply. It took a while but I got it to work with my scenario. C# is giving me nightmares, but I shall persevere.
Would there be much difference if I passed values with the events?
Thanks
Paul
Would there be much difference if I passed values with the events?
Thanks
Paul
Active 3 days ago
Hi Paul,
Your delegate will have to change to something like
public delegate void HandleData(string value);
You will have to call the event using a parameter
hasData("Hello");
and your implementation will have to change to
public void DoSomething(string value) {
console.WriteLine(value);
}
Think that's it.
Obviously haven't tested it.
Cheers,
Darren
Your delegate will have to change to something like
public delegate void HandleData(string value);
You will have to call the event using a parameter
hasData("Hello");
and your implementation will have to change to
public void DoSomething(string value) {
console.WriteLine(value);
}
Think that's it.
Obviously haven't tested it.
Cheers,
Darren
Featured Post
Question has a verified solution.
If you are experiencing a similar issue, please ask a related question
Suggested Solutions
| Title | # Comments | Views | Activity |
|---|---|---|---|
| aspx ascx, c# | 7 | 45 | |
| .NET Redemption/Outlook Examples | 3 | 35 | |
| Help solve error message when converting date using vb.NET | 10 | 44 | |
| What!!!??? | 5 | 63 |
Exception Handling is in the core of any application that is able to dignify its name.
In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
Performance in games development is paramount: every microsecond counts to be able to do everything in less than 33ms (aiming at 16ms). C# foreach statement is one of the worst performance killers, and here I explain why.
The viewer will learn how to implement Singleton Design Pattern in Java.
The goal of the tutorial is to teach the user how to use functions in C++. The video will cover how to define functions, how to call functions and how to create functions prototypes. Microsoft Visual C++ 2010 Express will be used as a text editor an…
Suggested Courses
Course of the Month2 days, 9 hours left to enroll
752 members asked questions and received personalized solutions in the past 7 days.
Join the community of 500,000 technology professionals and ask your questions.