How To Make an event occur in fixed time intervals without Sleep( ) in C++/CLI

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I want the progress bar to have certain values after specific time intervals. but the Sleep function Stops the ui from appearing.

My Code

C++

private: System::Void ProgressBarSave_Load(System::Object^  sender, System::EventArgs^  e) 
	        {
		        for (int i = 0; i < 4; i++)
			{
				Thread::Sleep(3000);
				progressBar1 -> Value +=25;	//progress Bar Value
				if ( i == 3)
				{
		                    Close();			//Closes The Dialog
				}
			}
		}

Posted 13-Nov-12 21:35pm

BladeFireX

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2 solutions

Solution 1

Um.
Where do I start?
If you want a progress bar to show progress, then sleeping the thread is always going to be a silly move. Firstly because it stops the UI thread from actually changing the display, and secondly, because it doesn't allow any program to actually be made unless you have that working on a different thread. And if you have it working on a different thread, then why are you reporting progress as if it wasn't?

There are a couple of possibilities: make the progress bar a Marquee in which case it will rotate itself without your intervention, or do the job properly with a BackgroundWorker and ReportProgress

Posted 13-Nov-12 22:02pm

OriginalGriff

Comments

BladeFireX 14-Nov-12 4:30am

isn't there a delay like function in cli? if not, then how can i use ReportProgress?
and i do not have my code working on a different thread, and i have the progress bar opened up in a different dialog.

OriginalGriff 14-Nov-12 4:42am

Why not move your code into a background worker on the dialog containing the progress bar?
Any other way is multiplying interconnections, and making your life harder.
For example, if the progress dialog is modal, then the thread that displays it is frozen until it returns - so no work can continue on that thread anyway...

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Richard MacCutchan · Accepted Answer · 2012-11-14T01:59:00

Solution 2

Use the Timer class[^].

Posted 14-Nov-12 1:59am

Richard MacCutchan

How To Make an event occur in fixed time intervals without Sleep( ) in C++/CLI

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How To Make an event occur in fixed time intervals without Sleep( ) in C++/CLI

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