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
3
votes
1 answer
stop a thread before closing form
Using .NET4, c#,
I have a grid on a winform. When I hit a process button, I need to perform a timely operation with a few steps on each row and then update the row with a result. This way the user can see progress while the next row is processing.…
Mike Turner
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3
votes
3 answers
WhenAll() not working as expected
I need to make UI thread wait until a task array completes execution.The problem with below code is that - the tasks inturn invoke UI thread to write into textbox. How to fix this?
public partial class FormConsole : Form
{
public FormConsole()
…
Murali Uppangala
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3
votes
1 answer
Convert BeginInvoke to async/await
I have a function apiClient.OrderSend that must be called inside the "GUI" thread, so I created this function
private void RunOnUIThread(Action action)
{
this.BeginInvoke(action);
}
I then have a function that needs to return an…
Ivan
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3
votes
0 answers
How do I identify and resolve memory leaks in WPF's BeginInvoke()?
I'm working a windows .Net C# WPF application.
The application displays video frames in addition to displaying some additional analytic data in a canvas.
The app is processing a frame rate of about 15 frames per second.
Processing is completed on…
JohnB
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3
votes
2 answers
Invoke and Delegates in events - Why does the actions happen in this (unexpected) order?
I had a problem with component events which could be solved by using a delegate.
I haven't worked with delegates before, so I tested a little bit and found this strange behaviour:
When using delegates the actions happen in a for me completely…
marsh-wiggle
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3
votes
0 answers
C# - Calling BeginInvoke on a control fails to call the delegate
I am faced with an interesting issue that happens on Windows 8.1 while the application runs fine on Windows 7. The problem happens when we call BeginInvoke on a control to switch the execution to the UI thread that created the control in order to…
Adi
- 31
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3
votes
2 answers
Delegate, BeginInvoke. EndInvoke - How to clean up multiple Async threat calls to the same delegate?
I've created a Delegate that I intend to call Async.
Module Level
Delegate Sub GetPartListDataFromServer(ByVal dvOriginal As DataView, ByVal ProgramID As Integer)
Dim dlgGetPartList As GetPartListDataFromServer
The following code I use in a…
Dan
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3
votes
2 answers
AdressOf method signature
Since I can't put in parameters, how can I respect the following signature?
Private Sub SetFocusToRow(ByRef ultraGridRow As Infragistics.Win.UltraWinGrid.UltraGridRow)
grdSoldeOuverture.ActiveCell = ultraGridRow.Cells(0)
…
phadaphunk
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3
votes
4 answers
BeginInvoke claims the control's window handle has not been created even though I think it was
In my form's constructor, I call:
InitializeComponent(); // boilerplate placed by VS, initializing controls
label1.BeginInvoke(new InvokeDelegate(RefreshLabelDelegate));
Yet, I get the dreaded exception with the message:
"Invoke or BeginInvoke…
Not So Sharp
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votes
7 answers
When is the GUI overloaded?
Suppose you are permanently invoking a method asynchronously onto the UI thread/dispatcher with
while (true) {
uiDispatcher.BeginInvoke(new Action(insert_), DispatcherPriority.Normal, new object[] { });
}
On every run of the program…
marc wellman
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3
votes
2 answers
For a given priority, are Dispatcher.Invoke() and Dispatcher.BeginInvoke() equal?
Given that Invoke() blocks the calling thread until the delegate is executed, I was wondering if it is given any kind of priority over delegates queued by BeginInvoke(), which by definition would infer that timeliness is less important?
Anyone know?…
GazTheDestroyer
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2
votes
3 answers
UI still non responsive after using control.begininvoke
i've made a C# winforms application. Now i have a form which has lots of buttons, which call huge number crunching functions whose output i update in a textbox. I call the textbox.begininvoke() method to which i pass a delegate to the function which…
Anirudh Goel
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2
votes
2 answers
Why is Visual Studio 2010 telling me "'System.Delegate' does not contain a definition for 'EndInvoke'"?
Why is Visual Studio 2010 telling me "'System.Delegate' does not contain a definition for 'EndInvoke'" when I call job.Delegate.EndInvoke()? How do I fix it? Note that it likes BeginInvoke() just fine, and doesn't complain if I add EndInvoke()…
sh-beta
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2
votes
1 answer
WPF BeginInvoke and EntityFramework
I have a search through database. Search works in separate thread.
When entity is found I have to show it and some of related data into WPF UI.
I use EntityFramework. Main idea of search process is:
foreach (var item in _currentEntitySet)
{
…
Renatus
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2
votes
1 answer
Decoupling caller from callee in C# using delegate/BeginInvoke
In C# I have a hierarchy of classes that perform actions that could potentially take a long time. For this reason, I implemented a decoupling/callback mechanism so the caller is not blocked, but is informed of an action's completion through a…
Jeroen
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