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by: Steve Amey |
last post by:
Hi all
I am creating a basic control to perform some tasks, and I want to declare
some events to be raised so they can be handled from the form that the
control is on. I can create my own Event Handler class and use that, but I
would like to use the System.EventArgs class so that my event can be handled
by different controls.
For example:
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by: ZAky |
last post by:
Why do I get a System.NullReferenceException for this script?
I added the following script to a simple form with a button.
<Script>
public event EventHandler DoThis;
static void Main()
{
Application.Run(new Form1());
}
private void button1_Click(object sender, System.EventArgs e)
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by: Phill |
last post by:
All the event handlers seem to pass an Object and an EventArgs object.
If the event doesn't need this info why pass them anyway? It is inefficient.
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by: Jack Addington |
last post by:
I have a 3rd party object that fires an itemchanged event when someone edits
some data on a form. This event has a custom eventArgs that has a field
called ActionCode. In the code of the event, if you set this ActionCode to
various values the control will respond in various ways (reject, reject
change field, accept, etc). I am trying to understand exactly how that
works as I am trying to extend the control and add more processing s...
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by: Amil |
last post by:
when i double-click on a button on a form as i am designing the form, the IDE
creates a method corresponding to a event assignment as follows:
this eventhandler: this.exitToolStripMenuItem.Click += new
System.EventHandler(this.exitToolStripMenuItem_Click);
is paired with: private void exitToolStripMenuItem_Click(object sender,
EventArgs e) {}
How do/Can I what the EventArgs are?
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by: Yangtsi River |
last post by:
Hi,
in any event procudure,there is two paras:sender As Object, e As EventArgs,
i copied them-not know what they are about, and my ASPX works.
I guess the sender is the control by which I triggered this sub, and what is
EventArgs then?
I am passing a third para to the sub, that is mysub("jim",sender As Object,
e As EventArgs),
the sub is defined like :
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by: Leslie Sanford |
last post by:
I have a hierarchy of message classes. Many times when messages are
created/received by a class, an event is generated to let the outside
know. Also, the message is passed along when raising the event.
To follow the .NET event guidelines, each message class therefore needs
its own EventArgs derived class to represent it. The problem is that
these EventArgs classes do not add anything of value themselves. There
is no additional event data...
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by: Bob |
last post by:
Hi,
I'm still new to asp.net and i would like to understand this: "Source As
Object, e As EventArgs"
<script runat="server">
Sub button1(Source As Object, e As EventArgs)
p1.InnerHtml="You clicked the blue button!"
End Sub
</script>
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by: Frankie |
last post by:
The .NET Framework provides us with built-in event handlers:
System.EventHandler
and the generic
System.EventArgs<TEventArgs>
It appears that those built-in event handler delegates are just a
convenience for us, as we can use those instead of creating a new delegate
for every event that we implement.
Question: Is it good to use those built-in event handlers as a matter of
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by: Tony |
last post by:
Hello!
One more thing assume I create an event and an object derived from the
eventArgs containing some info about the event.
Then create another event also with an object derived from the eventArgs
containing some info about the
event.
When creating the event handler I have two choices either use EventArgs as
the second parametr and cast to the actual type
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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, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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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 effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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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, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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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 protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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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 we have to send another system
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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