VB.NET Tutorial 53 - MultiThreading (Visual Basic 2008/2010)

[@rogerbreton6412]

Thank you so much for your patience and generosity in explaing the basic idea behind multithreading. This provides a simple solution to the issue I ran into, trying to start a Timer on a given WinForm at the press of a button. The problem is that the Timer_tick never excecutes.

[@philm5380]

Thank you for simplifying this concept! My UIs are always frozen and my progress bars are always ghetto (i += 1 and refresh, etc.) Now I'm gonna learn about delegates and get professional up in here... Um, where's the next tutorial with the delegates? ... TeachMeComputer! My career is in your hands! What are delegates and how do I use them?! :(

[@hdqxgxa]

Excellent tutorial. We appreciate the time that you take in developing and recording the tutorials. I also like the way you provide a quick explanation when you take "shortcuts" like the crossthreading check....for those critics out there....this is for Instructional Purposes Only due to time constraints..... Thanks again!

[@AbishaiSingh]

Thanks for explaining the concept in a very simplified manner..

[@stansarproductionz]

this scouser is great, explains complicated concepts with ease. keep it up!!!

[@taarchi]

我非常喜欢你的教程关于线程，你的解释很清除！ Thank you very mucch for your explanation, very clears, now I undestand crossthreading

[@NathanaelCrapo]

I like this tutorial upto the part where you used the cross threading. i found a way around that without doing the delegate thing and it was simple enough for me to learn all on my own.

[@Sc00rpY]

Just change quality to 720p and you will see the code on fullscreen :) Thanks for this tutorial, i looked for a way to pass that error on compiling

[@TheColonel_]

Very nice, when googling this I just end up with something that has 29347692837492837492834 lines of code just to show one small example -.- This was very nice and simple, thanks.

[@kevins1738]

Very good example! very usable for high frequency transactions, reports, etc

[@TeamOrtus]

Did you ever post the next tutorial explaining the use of delegates? If so any chance you can post where it's located as I can't seem to find it. Great tutorials... please keep adding more as they've helped me out alot. Many thanks :-)

[@peekay69]

Thanks a lot for your tutorial! Where is the delagate tutorial you promised?

[@gybersantos]

@TheCowWhoClutchd Timer executes the code inside it repeatedly with the delay of what the value of its Interval property. The thread executes the code parallel with the main thread. When we say parallel, it is executed at the same time...

[@LosTecH88]

thanks man... nice tutorial again...cant wait for the next tutorial...

[@ramasamyramasamy]

Thank you for video tutorial. After starting the thread you haven't mentioned anything about the thread abort or closing of thread. Hope it's necessary to abort the thread while closing the form. But Great work dude! Well done !

[@lycosa2000]

Thanks a lot for this.. I've been looking for a solution for VB's clunky timer control that opened, read, and then closed a serial port and my program froze each time the timer fired and it was really annoying me. This helped a ton!

[@rogerbreton6412]

I'm in the same boat! I need to show time elapsed in my Form for the user to know what's going on, because the time to send a command and receive a response from the RS-232 port can go from a few seconds to 10 minutes!

[@ThePassingVoid]

You can also use "i += 1" to increment i by 1in the loop.

[@ryasmi]

nice video, very descriptive and clear.

[@hectormzt1]

Thanks dude! i was looking for this

[@emann123456]

thank you for making the tutorial even if 3-4AM

[@henryjpr4756]

Thanks MUCH! It's a shame you didn't do the "Threading Using Delegate" tutorial. There are other tutorials on the subject, but I'm having trouble when a thread, from a module, attempts to update a control on a form in the UI Thread. I see nothing on that.

[@owlglazing]

Where is the Delegate post? My app is really big and multithreading doesn't work.

[@NathanaelCrapo]

or use an Enum as a status keeper and use a timer specific to managing those other threads from the main thread which want to access controls on the main thread.

[@ncc1853]

I love the simplicity of the tutorial. Do you post your somewhere?

[@MouraoRenato]

Excellent video. It`ll help me a lot in a project I`m developing. Thank you very much for the video.

[@victornogueira8317]

good video!!!! From GnSistemas!

[@klynh13]

thx big time. right now the only way i knew how to multithread was though a background worker but this is ay better

[@Machiavelli_0000]

I appreciate your videos. Thanks for your work.

[@wgh999]

Thanks for making it so basic!

[@GhostMajoRX]

Tnx bro now im fixed my chat application auto refreshing... thank you a lot ;)

[@50Hz]

That was very good..

[@tilankak]

Thanks. Very helpfull

[@oakbank1953]

Nice and simple; just what the doctor ordered...:)

[@misaik]

u can use delegate too for mor security

[@untitledname5183]

Great way to explain, thx

[@hwatcha24]

great tutorial !

[@Many_Mirrors]

Like you!

[@denisikac]

Thank you

[@danedavis5098]

great video, thanks!

[@Bulfoz]

Well done. thank you.

[@matrixitalia7575]

what the program 4 recording from desktop? :) thks nice video!

[@peterschiller2451]

Since VStudio 2012 it is possible to use Async with Await task.delay(xxx). It's much more easy to use. You can run as much threads as you want. Async Sub xxx() do until i >1000 I +=1 label1.text=i await task.delay(100) loop

[@iRepTiLeZHD]

make a separate thread for each sub and try to break everything into subs so every action can have its space. for example : private sub compress1 choose file - end subprivate sub compress2 read file end sub - private sub compress3 write to file end sub - private sub compress4 compress end sub ___ then make a thread for each sub

[@Vortex93]

Can you make a tutorial on how to make Server with ports and run on ip etc.. ??

[@hscsoft_tutorials]

Masssive thank u for crosscheck solution.

[@stonkwell]

yoink! cheers mate

[@soulreaver4962]

@5hunt3r it's just checkforillegalcrossthreadcalls = false

[@eduardositedotcom]

thanks thanks thanks thanks. you are my new.cool.idol(Byval thebest)

[@jeffb1122]

is that will work on datagridview?

[@carstorm85]

So doing this I can make a game right? Because right now My game is laggy-like because only one thing moves at a time.

[@fede142857]

Now, how do I run several pieces of the same code in different threads? I don't really know how to say it, so here is an example of what I want: Pretend I'm making a file compressor, but when I test it I find that it works too slowly (i.e. takes 2 minutes to compress a single 4MB file) and want to speed it up, say, at least 4 times as fast. How should I do that? Someone please reply.

[@pivitman101]

thanks man this help me .

[@iRepTiLeZHD]

actually, setting 'CheckForIllegalCrossThreadCalls' to false is important if your using multi-threading for security-purposes

[@odonnaghan]

Thank you!

[@HemmingEducation]

great

[@TheMadHeadSeries]

How come a open file dialog is blank when run on a separate thread is it a bug?

[@PaulNathan82]

Nice tutorial, thanks :-))

[@flyrose9685]

thank's men for this tutorial

[@25DMTutorial]

I have just add an updater in my application with the help of your Video: VB.NET Tutorial 40; and so When I checked for update and then when I click anywhere on the form then the Form does not respond. (My internet connection is too slow, so that I causes the Problem While Checking for update too...) So please Help me

[@roydolfje]

is there an way to make the countup faster

[@njthemonsterIII]

quick explanation: Me.ChekForIllegalCallSigns = False ; He got this error because both threads were using a shared variable or component (in this case Me.Refresh), this error is to prevent multiple threads from modifying a common variable and thereby screwing eachother over. Me.refresh wont cause anything bad to happen if they cross. But beware, never use a common variable with Me.CheckForIllegalCallsSigns =False :D I shall make a video to explain this fully.

[@엠에스티시스템]

Thanks.

[@TMakawa265]

PlayThroughForYou why shouldnt we use that checkforillegalcrossthreadcalls = false...what could end up happening?

[@Thapains]

@TheEpicNewb Do you have .net framework 4?

[@leriosindane720]

Still Dop in 2021

[@SlavaVB]

How come it counts up so slow washout a delay?

[@geilereliasradillosarmient4936]

and if to run two forms at once as I could do this using threads

[@megascan]

Thx man

[@ncc1853]

your code somewhere?

[@DJDexeee]

Guys Its not Me.CheckForIllegalCrossThreadCalls = False Its Control.CheckForIllegalCrossThreadCalls = False

[@alfredcancio982]

i just wanted to know if is it possible that an array of multithreading?

[@Mahekaru]

I wouldn't use an array try using a list try dim lstThreads = new list(of threads) then do lstthreads.add(). Keep in mind you'll need a loop like a for each loop to go through each thread and start them all. something like for each i in lstthreads i.start loop.

[@sarthaksharma9746]

Can I use Multi Threading to DDoS Websites also?

[@BitSec]

agcourse u can

[@5hunt3r]

little question ... tryed to add "Me.CheckForIllegalCrossThreadCalls = False" but VB2010 wont accept this .... anyone knows why ?

[@stefanorevic5116]

If i run multiple threads, how do i stop all of them in single button click?

[@Mahekaru]

it's like if thread.isbusy then thread.stop or suspend something like that.

[@destroyer7712]

thx

[@alialali3a]

Thankssssssssssssssssssss

[@sputtnikk11]

How do i pass parentheses? It wont let me :/

[@IMSSEvolution]

Add to form load Control.CheckForIllegalCrossThreadCalls = False THEN YOU WONT NEED Delgats

[@pranays94]

You are from Liverpool,arent you? :P

[@rogerbreton6412]

Is that where his accent comes from? I thought, naively, "Scotland". But I'm French :-)

[@Razorrule]

best way are Delegates instead of AllowCrossThreadCalls. (just want to say)

[@Blubbz0rZ]

@swehunter2000 You can actually do that, leave me a pm with the exact error and I'll tell you a fix.

[@MadMatty72]

'DoEvents' statement inside loop would have allowed either button to work. Both loops would be running on same thread however. Explanation good except for allowing cross threading - very bad.

[@rayags]

some tutorial where delegates use????? help me XD

[@Blubbz0rZ]

@swehunter2000 Form.Show / Form.ShowDialog Put control.checkforillegalcrossthreadcalls = False on startup

[@silentcod3r]

Agreed. Using this approach seems bad practice and it's a lazy programmers approach.

[@MadMatty72]

DoEvents

[@gamenew09]

@rich2600rich2600 Check if you muted on your computer and the KZbin player.

[@Irishsam]

Teaching yours to use check for illegal cross threads is just unforgivable. As your project grows and becomes more complex tracking down bugs may become harder. You can leave your self with race conditions or deadlocks. You should never be setting CheckForIllegalCrossThreadCalls to False. Whenever you have a need to access a control from a thread other than the UI thread, you should use a delegate to invoke a method.

[@PlayThroughForYou]

It would send many errors later on, all its doing is saying even if the application finds an error it would keep going, this is a bad thing. you want to invoke your threads rather than not checking for errors. look up invoking tutorials for real multi-threading. This is just the slum way of doing things and is really bad.

[@toneation]

Thanks,please zoom ; )

[@bubba6647]

Doing two bad functions at the same damn time.....

[@nemanja747]

I CANT SEE SHIT!!!

[@PlayThroughForYou]

NO NO NO NO NO, Me.CheckforIllegalCrossThreadCalls = false IS A BAD HABBIT, do not watch this! Can cause many issues later on. I love your tutorials but do not listen to this one!

[@nenenartey4266]

Thanks. very helpful