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by: Paul |
last post by:
Hi,
I have the following code in a winform:
....
private delegate void DownloadDelegate(string src, string dest);
....
private void DownloadFile(string src, string dest)
{
WebClient wc = new WebClient();
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by: Paul Tomlinson |
last post by:
Morning all. Let me describe my problem.
Main thread creates child objects and threads and starts them
Timer on the main thread (which only gets activated after the child threads
have started) periodically calls a function Refresh().
This refresh function runs on its own thread and queries our database for
new jobs.
For each job found this timer invokes a delegate on one of the child thread
objects.
I then get the error "Cannot call...
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by: pz0071 |
last post by:
G'day,
I think I got my head around using delegates, particularily when
updating the user interface from another thread. I got it all sussed,
just not 100% sure on the correct syntax for calling the delegate.
Is
this.Invoke(delUpdateUI, args);
Same as
delUpdateUI(i);
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by: Wavemaker |
last post by:
One of the things I've struggled with from time to time is handling
events raised on different threads. For example, an object could be
listening to events from one or more objects running in different
threads besides itself. There is a concern for thread safety. There are
various ways of dealing with this. One way is to make the class thread
safe by putting in locks. But another way is to stream the events from
the various threads into a...
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by: Valerie Hough |
last post by:
I'm not entirely sure what the difference is between these two approaches.
In order to avoid reentrant code, I was using Control.BeginInvoke in my UI
to cause an asynchronous activity to be done on the UI's message loop. I
began to get System.ExecutionEngineException errors so (on the theory of do
something different if what you're doing isn't working) I switched to using
delegate.BeginInvoke with the appropriate EndInvoke and the problem...
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by: Eric Newton |
last post by:
Given the following code,
Public class ProgressFormManager
Public Sub BeginInvoke(ByVal method As , ByVal args() As Object)
Dim asyncCallback As New System.Threading.WaitCallback(method)
System.Threading.ThreadPool.QueueUserWorkItem(asyncCallback, args)
End Sub
....
End Class
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by: Terry Olsen |
last post by:
I'm running an asynchronous Socket. In the ReceiveCallback method, I need
to append what is received to a textbox on the main form. I have this code:
Private Sub ToChatWindow(ByVal msg As String)
txtChat.AppendText(msg)
End Sub
I've never used a delegate or invoke before and I'm rather confused on the
topic. Hope someone can help.
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by: Richard MSL |
last post by:
I have an application in managed C++, and a method in C# that I call. But now
I want to add the ability to tell the C# method a specific method in my C++
assembly to call back to. For example, to have the C++ call a sort routine in
C#, and send it a compare method, which the C## would call back to. I know
that within C# pointing to methods is done with delegates, but is it possible
between C++ and C#? Is there an example of this somewhere...
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by: jecheney |
last post by:
Hi,
another thread, Debug_Console is a listbox control on my main form, i
created the delegate to avoid the cross threading error. Now the
strange thing is, when i call the method from my other thread, the
entry string is added to the listbox, but it also throws an exception
after the string is added. I cant work out why.
The exception is:
=========================
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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: 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 tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
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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 Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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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: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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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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