two action at same time

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Hi all, I have created small windows apllication, in my form user will enter some data in the TextBox and user will save the data, but in background there should some process go on like checking the database connection whether it's open or not,

Both action should go on. Entering data as well as connectivity process
How to do this.

Posted 26-Mar-12 22:52pm

sameertm

Updated 26-Mar-12 23:22pm

Shahin Khorshidnia

v2

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4 solutions

Solution 1

You can make your application mutithreaded, see, for instance, the CodeProject's article "Introduction to making multithreaded VB.NET Apps"[^].

Posted 26-Mar-12 23:02pm

CPallini

Comments

Shahin Khorshidnia 27-Mar-12 5:24am

+5

Sergey Alexandrovich Kryukov 27-Mar-12 19:24pm

This is informative, my 5, but, strictly speaking, there is no "at the same time". This is not real time. I hope you'll like my answer... :-)
--SA

CPallini 29-Mar-12 3:34am

Well that's the 'UI level' same time. :-)

Sergey Alexandrovich Kryukov 29-Mar-12 12:40pm

I would understand it. There were a couple of cases where OP asked how to call "two methods at the same time", but in fact they just wanted to call two methods from one no matter in what order; some people do not understand what the call is...
--SA

Solution 2

Look at using a BackgroundWorker Thread: MSDN[^] - it is probably the simplest way to get started with threading. The link includes an example.

Posted 26-Mar-12 23:07pm

OriginalGriff

Comments

Shahin Khorshidnia 27-Mar-12 5:24am

+5

Solution 3

You should use a background worker on your application..
the one that will check the

VB

friend withevents Bw1 as new backgroundworker

VB

Private Sub StartButton_Click(ByVal sender As System.Object, _
                                  ByVal e As System.EventArgs) _
                              Handles StartButton.Click
        Bw1.RunWorkerAsync()
    End Sub


''here is the event for the backgroundworker
''check for the connection

    Private Sub Bw1_DoWork(ByVal sender As System.Object, _
   ByVal e As System.ComponentModel.DoWorkEventArgs)Handles Bw1.DoWork
''code here
    End Sub

You can also use system threading

Posted 26-Mar-12 23:19pm

nj15

Updated 26-Mar-12 23:21pm

v2

Comments

Shahin Khorshidnia 27-Mar-12 5:23am

2 because nothing more than Solution1 and Solution2.

sameertm 27-Mar-12 5:24am

can u give me some sample code for threading.

Shahin Khorshidnia 27-Mar-12 5:26am

Refer to the links in Solution1, there is a nice standard sample for BackgroundWorker. and a good sample in the article that linked in solution 2 for mutithread

sameertm 27-Mar-12 5:30am

i created one thread when my form is load thread will start.after thread start there will be some process go's on once ,once the prcoess is over,again i need to start my thread. this is my sample code

Private Sub Startup_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

t = New Thread(AddressOf Me.BackgroundProcess)
t.Start()
End Sub
Private Sub BackgroundProcess()
''my process
''
''
End Sub

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Sergey Alexandrovich Kryukov · Accepted Answer · 2012-03-27T12:27:00

Solution 4

Nothing can be guaranteed to happen at the same time, at least not in the non-real-time system.
If you do something in one thread, your actions follow consecutively. If you do it in different threads, they may overlap in time, but as thread scheduling is probabilistic, nothing can give you 100% guarantee exact timing. And if some objects move fast enough, the concept of the "same time" for a space-like interval does not even makes sense :-), please see:
http://en.wikipedia.org/wiki/Space-like#Space-like_interval[^].

—SA

Posted 27-Mar-12 12:27pm

Sergey Alexandrovich Kryukov

Comments

Shahin Khorshidnia 27-Mar-12 19:09pm

Good Point

Sergey Alexandrovich Kryukov 27-Mar-12 19:24pm

Thank you, Shahin.
--SA

CPallini 29-Mar-12 3:33am

My 5.

Sergey Alexandrovich Kryukov 29-Mar-12 10:44am

Thank you.
--SA