Stack Overflow
Stack Overflow

Questions tagged [cross-thread]

38 questions
0
votes
0 answers

Is there a way to simplify the code for handling multiple cross-threaded exceptions?

I'm making a 1:N asynchronous chat program in C# Windows Form. When the server connection was successful, an attempt was made to change the Enabled property of the Connect button to false. A cross-thread exception was thrown at this…
user18024704
0
votes
0 answers

WinForms Tab Control Causing Cross-Thread Operation

This is the error I am receiving. I have a button on a winforms control (as depicted below). I have an async void method that is attached to the click event handler (as depicted below) The issue that I am having is that this code runs perfectly…
Jeremy Buentello
  • 133
  • 9
0
votes
0 answers

Why creating a new form and showing it in another thread does not raise cross-thread exception in Visual Studio?

Say I have a Windows form and then click a button to start a new thread. If in that new thread I change something about the current form, like its background color, Visual Studio will raise an invalid operation exception as I have crossed threads…
Girl Spider
  • 330
  • 2
  • 6
0
votes
2 answers

How to let the code run smoothly using timers and different threads

I'm trying to prevent the GUI from freezing, because of a low timer interval and too much to process in the Timer.Tick event handler. I've been googling a while and I understood that I cannot update UI from any other thread other than the UI…
Mattia
  • 258
  • 7
  • 25
0
votes
0 answers

Cross Thread operation on Rich Text Box Selection actions

I've created a custom Rich Text box in my .Net winform application, and I'm facing a strange issue. The goal is append Text to the rich text box with a specific formating, all of this within another thread. For this I've created delegates callback.…
TmZn
  • 399
  • 5
  • 16
0
votes
0 answers

.net add handler multithread

I’m tying myself up in knots here with multithread in vb. I have a working program that I subscribe to 4 events using the add handler address of and point to a function on my main form. I have 4 separate functions that all do exactly the same thing…
Paul Speirs
  • 19
  • 2
0
votes
1 answer

how to safe call a control from another thread using Timers.Timer

I read various posts, and made a practice project, but it does not works. The form have a button and a text box with a default text 'Updated 0 times'. On button click starts the timer and each time update the text with the number of times the text…
user2150033
  • 83
  • 5
0
votes
0 answers

Cross-thread operation error occur when using backgroudWorker C#

I want to display a progress bar when fetching data to textbox using backgroundWorker. But when debugging, it raised an the following error: I have read the similar case but It cannot solve my problem. System.InvalidOperationException:…
Cát Tường Vy
  • 398
  • 6
  • 32
0
votes
1 answer

DataGrid not creating Rows when its ItemSource is updated & Sometimes Duplicate entries

We are making a WPF app that uses a FileSystemWatcher to monitor changes to a directory of the user's choice and outputs the changes onto a DataGrid. In my MainWindow() constructor, I bind my DataGrid to a List I call _eventList via…
Matthew Jett
  • 57
  • 9
0
votes
0 answers

Control.InvokeRequired - Subject to a race condition

I found a suggested solution to the cross-thread exception issue in another posting and have used it my code below, but I am finding it erratic at best. My tests indicate that it's correct operation is at the mercy of a race condition so I was…
BenevolentDeity
  • 693
  • 1
  • 4
  • 18
0
votes
1 answer

async/await debugging in WinForms: system.invalidoperationexception cross-thread operation not valid

When starting/running your aplication from within Visual Studio 2017 by Ctrl+F5 (Start Without Debugging) and using async/await for winforms' controls events processing. e.g., button click event processing, you can access these controls properties…
ShamilS
  • 1,410
  • 2
  • 20
  • 40
0
votes
1 answer

Error while dynamically creating toolStripMenuItem

I'm having the following issue: I have a config file and a listener over this file. When changed, triggers a method (createMenuAndItems), that modifies the toolStripMenuItem. The method createMenuAndItems is called upon load of the Form and when the…
Lasmaty07
  • 21
  • 6
0
votes
2 answers

Cross-thread operation

I happen to get this Cross-Thread Error when trying to invoke a textbox from a different thread other than the main MMI Thread. I already understand why it happens.I would like your opinion about the way I am solving this. I am using this because I…
Yaniv.M
  • 3
  • 2
0
votes
1 answer

Update ListView from a thread not the original thread in C#

I already know that to update control, I can use Invoke Action progressBar1.Invoke(new Action(() => { progressBar1.Maximum = 0; })); But that only work with property of control which are single data. Now I have a thread that need to change the list…
user3505230
  • 33
  • 8
-1
votes
1 answer

Using Task to Setup a DataGridView

I am using Task() to offload work during the start of my application. And it was working fine. And then it wasn't... If I've got it right, I am making a copy of 'SomeStatusradGridView'. Which means I should be fine, except I get the following…
Scooter
  • 364
  • 3
  • 8
1
2
3