- #Multithreading vb net 2010 example how to
- #Multithreading vb net 2010 example update
- #Multithreading vb net 2010 example code
Have a look at the class for a more powerful API. This is a really weak API and will always have the delay you mentioned if the file is relatively large. If you want the sound to stop, use the My.() method. You *could* use the thread pool to play the sound synchronously, but there's no real reason. If it were me, I'd just use the My.() as indicated by Grimfort. It is a bit silly to use the thread pool because there are plenty of ways to play a sound without having to worry about threading, but that doesn't mean it's overkill. BackgroundWorker uses the thread pool, and I'd be willing to bet the general APM uses it as well. This is why the thread pool exists: so you can toss quick tasks onto a thread without paying the costs of creating a new thread. Every time you create a thread (and possibly restart it, I didn't research that thoroughly), there's an overhead of roughly 1MB of RAM in addition to the OS resources consumed by the thread.
#Multithreading vb net 2010 example update
' That means a thread can update ' m_MyForm.Value ' and then display its value without ' interference.ĭebug.The thread pool seems like total overkill for this You got this backwards. This doesn't do ' anything ' to the form, it just means no other ' thread can ' lock the form object until we release the ' lock. ' Count off seconds in the Output window. Public Sub New(ByVal my_form As Form1, ByVal my_number _
' This class's Run method displays a count in the Output ' window. If another thread reaches its SyncLock statement while this object holds a lock on the form, the second object waits until the lock is released. It then uses the End SyncLock statement to release its lock. Instead of displaying the value 2 and then 3, both of the threads display the value 3.Īfter it locks the form object, the Counter increments Value and displays the new value in the Output window. Object 2 displays the form's Value property 3.Object 1 displays the form's Value property 3.Object 2 increments the form's Value property to 3.Object 1 increments the form's Value property to 2.
#Multithreading vb net 2010 example code
Then suppose two threads are running and both enter this section of code at approximately the same time and follow this sequence of events: To see why this is important, suppose the form's Value variable holds the value 1. This doesn't do anything to the form, it just means no other thread can lock the form object until we release the lock. It sleeps for 1 second and then uses a SyncLock statement to get a lock on the form. The count comes from the form's Value variable. ' Make this a background thread so it automatically ' aborts when the main program stops.Ī Counter object displays its name and a count in the Debug window. ' Make a thread to run the object's Run method.ĭim counter_thread As New Thread(AddressOf _ System.Object, ByVal e As System.EventArgs) Handles _ĭim new_counter As New Counter(Me, thread_num) Private Sub btnStartThread_Click(ByVal sender As _ ' This value is incremented by all threads. The user can click this button several times to start different Threads. The program calls the Thread's Start method to make it run. If you don't do this, the Thread will keep running until its Run method exits (which it never does so it would run until it reached an overflow problem).
The program sets the Thread's IsBackground property to True so it will automatically stop when the program's main thread stops. It then creates a Thread, initializing it to execute the Counter's Run method. When the user clicks the Start Thread button, the program creates a new Counter object. Thread, multi-threading, SyncLock, asynchronous, threading
#Multithreading vb net 2010 example how to
This example shows how to start multiple threads in VB.NET. VB Helper: HowTo: Start multiple threads in VB.NET