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by: Martin Maat [EBL] |
last post by:
Hi,
I have a GUI application that responds to events coming from an externaql
application. In the implementing code for the event I need to create a GUI
control and "parent" the control into the GUI. Doing this directly fails, it
is not allowed to parent a control that was not created on the main GUI
thread into the main GUI through another thread (an exception is thrown on
"control.Parent = container;").
So I have to create the...
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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: BoloBaby |
last post by:
OK, check this out...
I have a form with a panel control and button on it (outside the panel
control).
I have two event handlers - one handles the click event of the button on the
form. The other handles a custom "CardInserted" event for a class I wrote
that watches for smart cards to be inserted into an attached smart card
reader.
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by: Thai Mai Shu |
last post by:
What is wrong with my call below. If I change the
delegate and the CallBackComplete function to not take in
parameters then the .Invoke call works fine. As soon as I
put the parameters back I get "Parameter count mismatch."
error. Am I supposed to implement ISynchronizeInvoke in
order to call .Invoke? If so, why does it work when the
method i am trying to invoke has no parameters.
Private Delegate Sub CallbackCompleteDelegate(ByVal...
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by: Samuel R. Neff |
last post by:
I'm trying to find a good way to handle Control.InvokeRequired without
duplicating four lines of code in every function/event. Typically
what I've seen in books is this:
If InvokeRequired Then
Invoke(new EventHandler(AddressOf thisFunc), new Object() { sender,
e})
Return
End If
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by: George |
last post by:
Hi,
Does anyone know how Control.Invoke can invoke a method which has ref
parameters?
For example,
class A {
public delegate MyFuncHandler(ref int i, ref int j);
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by: xamman |
last post by:
the handler declaration:
CustomValidator1_ServerValidate(ByVal source As System.Object, ByVal
args As System.Web.UI.WebControls.ServerValidateEventArgs) Handles
CustomValidator1.ServerValidate
the question:
if in this sub i am to set args.IsValid to true or false depending on
my custom validator code,
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by: Jeroen |
last post by:
We are experiencing a tuff-to-debug problem ever since we introduced a
WebBrowser control into our failry large application. I'm not sure if
the problem description below contains enough details, so if I need to
elaborate on something please ask for it.
We have a UserControl with a WebBrowser on it. This UserControl is
instantiated a few times during the program run, depending on user
interaction. The WebBrowser then navigates to a local...
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by: Phillip Taylor |
last post by:
I'm having a problem with this code. I can't really understand why it
won't work if, for example, I pass in a linked list of 0 records.
Public Sub ConversionUpdateComplete(ByRef records As LinkedList(Of
ListViewItem))
If (Me.InvokeRequired) Then
Dim method As New MigrationCompleteEventHandler(AddressOf
ConversionUpdateComplete)
Me.Invoke(method, New Object() {records})
Else
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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: 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: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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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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