The Windows-specific Dispatcher.BeginInvoke API method
The Windows-specific Dispatcher.BeginInvoke API method.
This API call asynchronously runs a delegate on the dispatcher-associated thread.
Questions tagged [begininvoke]
280 questions
11
votes
2 answers
Where are CLR-defined methods like [delegate].BeginInvoke documented?
[EDIT, Completely rephrased:] Seems like my question was poorly worded indeed, and poorly received too. So I hope that this complete rephrasing helps...
MSDN tells clearly specifies:
Control.BeginInvoke() Executes a delegate on the thread that the…
Adam
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10
votes
2 answers
Winforms to WPF conversion: BeginInvoke to what?
Here's my old code from WinForms:
private void ValueChanged(double inValue1, double inValue2) {
//only manual mode for this driver, so that's easy.
if (ValueLabel.InvokeRequired) {
ValueLabel.Invoke(new…
mmr
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10
votes
3 answers
Call BeginInvoke on MulticastDelegate?
According to Jon Skeet, "You can only call BeginInvoke on a delegate which has a single target invocation."
Why is that? What's the real reason?
Note: For clarification (and because I made this mistake), I am talking about the BeginInvoke on…
richard
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10
votes
2 answers
Dispatcher.Invoke with anonymous delegate works in Silverlight but not WPF
In Silverlight 4 I have a custom service class which has an asynchronous Completed event. Inside the Completed event I take the returned data and invoke a populate method via something like this:
private void service_Completed(object sender,…
Edward J. Stembler
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9
votes
4 answers
Do I need to call EndInvoke after a timeout?
On a web page, I am calling a third party who does not allow me to set timeout programatically. I call BeginInvoke and use the AsyncWaitHandle.WaitOne to wait a specified amount of time.
If the call times out, I move on and forget about the thread…
Chad
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9
votes
3 answers
Does BeginInvoke() run a separate thread?
In my WPF application, I want to do some work in a non-UI thread so as to avoid the UI from become not-responding. For that I did this:
var caller = new AsyncMethodCaller(this.SetPatternType);
caller.BeginInvoke(_patterns, null, null);
And…
Nawaz
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9
votes
3 answers
What should be passed for BeginInvoke's @object parameter?
I have an event delegate that is defined as follows:
public delegate void CallbackDelegate(Data data);
public event CallbackDelegate OnDataComplete;
I raise the event asynchronously:
// Raise the OnDataComplete event
OnDataComplete.BeginInvoke(new…
Kiril
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9
votes
1 answer
Understanding Thread/BeginInvoke? [beginner]
Consider the code:
class Work
{
public void DoStuff(string s)
{
Console.WriteLine(s);
// .. whatever
}
}
class Master
{
private readonly Work work = new Work();
public void Execute()
{
string hello =…
Moberg
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8
votes
3 answers
How to Unit Test BeginInvoke on an Action
I am looking for a way to test BeginInvoke on an Action method, since the method runs on a background thread there is no way of knowing when it actually completes or calls callback method. I am looking for a way to keep my test wait until the…
skjagini
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8
votes
3 answers
Delegate.BeginInvoke Delay
Sometimes when Delegate.BeginInvoke is invoked, it takes more than one second to execute the delegate method.
What could be the reasons for the delay? I get this issue 1 or 2 times a day in an application which runs continuosly.
Please help…
Maanu
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8
votes
7 answers
Why is my BeginInvoke method not async?
In order to avoid freezing of GUI, I wanted to run method connecting to DB asynchronously. Therefore I have written this:
DelegatLoginu dl = ConnectDB;
IAsyncResult ar = dl.BeginInvoke(null, null);
var result = (bool)dl.EndInvoke(ar);
But it is…
Petr
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7
votes
2 answers
Invoke of an EventHandler
I have the following EventHandler:
private EventHandler _myEventHandler;
public event EventHandler MyEvent
{
add { _myEventHandler += value; }
remove { _myEventHandler -= value; }
}
Could somebody explain the…
WaltiD
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7
votes
3 answers
Asynchronous Invoking - Is EndInvoke required?
Possible Duplicates:
Must every BeginInvoke be followed by an EndInvoke?
Is EndInvoke() optional, sort-of optional, or definitely not optional?
I've got a multithreaded application, and one of the secondary threads needs to get some code to…
William Lawn Stewart
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7
votes
3 answers
A threading problem where mono hangs and MS.Net doesn't
I'm testing my app with mono in prevision of a Linux port, and I have a threading problem. I initially considered pasting 3000 code lines here, but finally I've devised a small minimal example ;)
You have a form with a button (poetically named…
Clément
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7
votes
1 answer
Pass multiple parameters to BeginInvoke()
I have simple (as i think) logic.
public static void NotifyAboutNewJob(int jobId, bool forceSending = false)
{
Action notifier = SendAppleNotifications;
notifier.BeginInvoke(jobId, null, null);
}
Method SendAppleNotifications…
demo
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