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by: John Altland |
last post by:
Here is my basic problem. I have a form that executes a
cpu instensive algorithm occupying the first thread. When
the algorithm is executed another form pops up telling the
user the progress that has been made.
Whenever I attempt to update my frmProgress, the events
are put placed at the end of the thread's queue and
executed after my algorithm is finished. Using the
frmProgress.Label.Invoke method with delagates, I have
heard would fix...
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by: RickDee |
last post by:
Please help, anybody.
I am trying to write a program so that it can launch an exe file ( which is
also genereated in C# ) and then simulate the button clicking and invoke the
methods inside the exe. The button clicking part is working fine, but I just
cannot get the method call.
Here is my program snippet.
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by: Stephen Lamb |
last post by:
I have a background worker thread which I start from a form's HandleCreated
event that makes calls back to the form using Invoke. During shutdown the
form is disposed and the background worker thread is aborted by the system.
How is one to keep the background thread from calling form.Invoke after the
form's window handle has been destroyed? This is definitely happening in my
application. I haven't read anything about this problem in...
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by: rawCoder |
last post by:
Hi
I am having this InvalidOperationException with message Cannot call Invoke
or InvokeAsync on a control until the window handle has been created
This is raised when i try to invoke a method with arguments
I need to do this as the method is being called Asynchronously from
elsewhere using delegate's BeginInvoke method.
The form is well created/initialized yet the messages states otherwise.
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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: Charles Law |
last post by:
Hi guys.
I have two threads: a main thread and a background thread. Lots of stuff
happens in the background thread that means I have to update several (lots)
of controls on a form.
It is quite tiresome to have to write code to call MyControl.Invoke for each
control on the form, along with the delegates that are required for each.
Is there a better way to do this? What I mean is, if I could marshal the
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by: Pawan Narula via DotNetMonster.com |
last post by:
hi all,
i'm using VB.NET and trying to code for contact management in a tree. all my contacts r saved in a text file and my C dll reads them one by one and sends to VB callback in a sync mode thread. so far so good. all contacts r added properly.
now when another login adds me in his contact, i recv a subscription, so i popup a form and ask for accept/reject. this all happens in a separate thread. popup form gets opened and choice is...
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by: Jeff Stewart |
last post by:
I need a thread to run a subroutine which updates my main form's
progress bar. I've properly marshaled all UI updates to the main UI
thread, and after the main thread starts the worker thread, it waits
for the worker thread to complete by means of a while t.isAlive,
sleep(0) mechanism. But when my worker thread calls my
UpdateProgressBar routine, which calls Me.Invoke, the invoke call
blocks forever. But I can't figure out why the main...
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by: m.posseth |
last post by:
Hello
does someone know how i can invoke a method in the underlying thread without
the usage of a window handle ??
This works perfect in a form
Me.Invoke(New MethodInvoker(AddressOf ShowRecvdMessage))
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by: =?Utf-8?B?a2VubmV0aG1Abm9zcGFtLm5vc3BhbQ==?= |
last post by:
vs2005, c#
Trying to understand why one way works but the other doesnt.
I have not tried to create a simpler mdi/child/showdialog app for posting
purposes (I think even this would not be so small or simple). I am hoping
the description will generate some ideas I can check out.
PROBLEM:
-----------------
Switching to UI thread using Invoke(), everything seems good.
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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: 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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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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