WebOct 15, 2014 · Your form / control should have the Invoke method. Pass it the callback delegate, and it should execute it on the UI thread. Oh, and you should be able to do things like asynchronous I/O without creating new threads anyway, just use an asynchronous API to do the download. – Luaan Oct 15, 2014 at 15:25 2 What doesn't work in your code? WebOct 25, 2013 · You're still performing a single-threaded task, just re-launching it on the UI thread if needed. for (int i = 0; i < 500; i++) { string text = ""+i; textBox.BeginInvoke ( (MethodInvoker)delegate () { textBox.Text += text; }); } Share Improve this answer Follow answered Jan 28, 2013 at 19:22 Sten Petrov 10.9k 1 43 60 Add a comment 4
How to I invoke a delegate thread - CodeProject
WebDec 14, 2024 · BeginInvoke posts the delegate on the WinForms message queue and lets the calling code proceed immediately (in your case the for-loop in the SampleFunction ). Invoke not only posts the delegate, but also waits until it has been completed. So in the method AppendTextBox from your example you would replace Invoke with BeginInvoke … WebDec 17, 2024 · Solution 1 Do it the other way round: display the spinner - and control it - from the main UI thread, and use the BackgroundWorker events to monitor progress and termination. The long job gets done in the BackgroundWorker, the UI in the UI thread. That way, there is no need to invoke anything! fix your password
c# - How to update textboxes in main thread from another thread ...
WebDec 20, 2016 · The invocation list has the target property, which is the event's subscriber. If this subscriber implements ISynchronizeInvoke (all UI controls implement it) we then check its InvokeRequired property, and it is true we just Invoke it passing the delegate and parameters. Calling it this way will synchronize the call into the UI thread. WebAug 31, 2024 · You can either pass an instance of a UI control to the method (then fall Invoke on that), else wrap up what you want as a delegate; for example: static void DoStuff (..., Action updateMessage) { ... //loop updateMessage (currentState); } With: DoStuff (..., msg => this.Invoke ( (MethodInvoker)delegate { this.Text = msg; })); Share WebJun 1, 2016 · this.Invoke (new Action ( () => { MessageBox.Show (this, "text"); })); This will switch to main thread and show MessageBox with form1 parent. Share Follow edited Jul 31, 2012 at 14:32 Otiel 18.3k 16 77 126 answered Mar 18, 2011 at 8:22 Stecya 22.8k 10 72 102 This gives me a lot of compilation errors (ie. cannondale set off flat kit