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interrupting calculationsWhen I do a long calculation is there a possibility to interrupt this
calculation properly? For i as integer = 1 to 100000000 do something next and retrieve the i at the moment of the interrupting Thanks for any response Hello Andreas,
The term is: coroutine This article describles how to implement coroutines using the Win32 Fiber API: http://msdn.microsoft.com/msdnmag/issues/03/09/CoroutinesinNET/default.aspx -Boo Show quoteHide quote > When I do a long calculation is there a possibility to interrupt this > calculation properly? > > For i as integer = 1 to 100000000 > do something > next > and retrieve the i at the moment of the interrupting > > Thanks for any response > Do you mean this:
dim iAfterLoop as integer for i as integer =1 to 10000000 if i = something then iAfterloop = i end for end if next Ahmed andreas wrote: Show quoteHide quote > When I do a long calculation is there a possibility to interrupt this > calculation properly? > > For i as integer = 1 to 100000000 > do something > next > > and retrieve the i at the moment of the interrupting > > Thanks for any response No, Ahmed I am thinking at the event of closing my form.
Show quoteHide quote "Ahmed" <ahmed1***@gmail.com> wrote in message news:1151183649.478586.29540@m73g2000cwd.googlegroups.com... > Do you mean this: > > dim iAfterLoop as integer > > for i as integer =1 to 10000000 > > if i = something then > iAfterloop = i > end for > end if > next > > Ahmed > andreas wrote: > > When I do a long calculation is there a possibility to interrupt this > > calculation properly? > > > > For i as integer = 1 to 100000000 > > do something > > next > > > > and retrieve the i at the moment of the interrupting > > > > Thanks for any response > Hello Andreas,
Ah, I misunderstood as well. If yer looking for how to interrupt at form close, perhaps for the purpose of continuing the long op at the next run.. it's pretty simple. Im the Form_QueryClose event set a varaible.. like bFormClosing to True.. Then in the loop ask the variable if the form is closing.. and if it is, exit the op. (Exit For). -Boo Show quoteHide quote > No, Ahmed I am thinking at the event of closing my form. > > "Ahmed" <ahmed1***@gmail.com> wrote in message > news:1151183649.478586.29540@m73g2000cwd.googlegroups.com... >> Do you mean this: >> >> dim iAfterLoop as integer >> >> for i as integer =1 to 10000000 >> >> if i = something then >> iAfterloop = i >> end for >> end if >> next >> Ahmed >> andreas wrote: >>> When I do a long calculation is there a possibility to interrupt >>> this calculation properly? >>> >>> For i as integer = 1 to 100000000 >>> do something >>> next >>> and retrieve the i at the moment of the interrupting >>> >>> Thanks for any response >>> Note that this aproach will only succeed if the loop is started with a
asynchronous delegate Otherwise the form will simply freeze untill the loop has completed and pressing the close button will result in a " This program is not responding message " But for the rest you are right you can then set a boolean flag to jump out of the loop and let the function or a property setter return the value to the initial caller regards Michel Posseth [MCP] Show quoteHide quote "GhostInAK" <ghosti***@gmail.com> schreef in bericht news:c71747b4186fb8c865fbfa85872a@news.microsoft.com... > Hello Andreas, > > Ah, I misunderstood as well. If yer looking for how to interrupt at form > close, perhaps for the purpose of continuing the long op at the next run.. > it's pretty simple. > > Im the Form_QueryClose event set a varaible.. like bFormClosing to True.. > Then in the loop ask the variable if the form is closing.. and if it is, > exit the op. (Exit For). > > -Boo > >> No, Ahmed I am thinking at the event of closing my form. >> >> "Ahmed" <ahmed1***@gmail.com> wrote in message >> news:1151183649.478586.29540@m73g2000cwd.googlegroups.com... >>> Do you mean this: >>> >>> dim iAfterLoop as integer >>> >>> for i as integer =1 to 10000000 >>> >>> if i = something then >>> iAfterloop = i >>> end for >>> end if >>> next >>> Ahmed >>> andreas wrote: >>>> When I do a long calculation is there a possibility to interrupt >>>> this calculation properly? >>>> >>>> For i as integer = 1 to 100000000 >>>> do something >>>> next >>>> and retrieve the i at the moment of the interrupting >>>> >>>> Thanks for any response >>>> > > Example
Public Class Form1 Private Mvar_Cancell As Boolean Friend Property Cancell() As Boolean Get Return Mvar_Cancell End Get Set(ByVal value As Boolean) Mvar_Cancell = value End Set End Property Delegate Sub AsynchMethodInvoker() Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim AsyncProcess As New AsynchMethodInvoker(AddressOf Me.DoSomething) AsyncProcess.BeginInvoke(Nothing, Nothing) End Sub Private i As Integer Private Sub DoSomething() For i = 1 To 100000000 'do your stuff here If Me.Cancell Then Exit For End If Next End Sub Private Sub Form1_FormClosing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles MyBase.FormClosing Me.Cancell = True MsgBox("The value of i =" & i.ToString) End Sub End Class regards Michel Posseth [MCP] Show quoteHide quote "Michel Posseth [MCP]" wrote: > Note that this aproach will only succeed if the loop is started with a > asynchronous delegate > > Otherwise the form will simply freeze untill the loop has completed and > pressing the close button will result in a " This program is not responding > message " > > But for the rest you are right you can then set a boolean flag to jump out > of the loop and let the function or a property setter return the value to > the initial caller > > regards > > Michel Posseth [MCP] > > > > > > > "GhostInAK" <ghosti***@gmail.com> schreef in bericht > news:c71747b4186fb8c865fbfa85872a@news.microsoft.com... > > Hello Andreas, > > > > Ah, I misunderstood as well. If yer looking for how to interrupt at form > > close, perhaps for the purpose of continuing the long op at the next run.. > > it's pretty simple. > > > > Im the Form_QueryClose event set a varaible.. like bFormClosing to True.. > > Then in the loop ask the variable if the form is closing.. and if it is, > > exit the op. (Exit For). > > > > -Boo > > > >> No, Ahmed I am thinking at the event of closing my form. > >> > >> "Ahmed" <ahmed1***@gmail.com> wrote in message > >> news:1151183649.478586.29540@m73g2000cwd.googlegroups.com... > >>> Do you mean this: > >>> > >>> dim iAfterLoop as integer > >>> > >>> for i as integer =1 to 10000000 > >>> > >>> if i = something then > >>> iAfterloop = i > >>> end for > >>> end if > >>> next > >>> Ahmed > >>> andreas wrote: > >>>> When I do a long calculation is there a possibility to interrupt > >>>> this calculation properly? > >>>> > >>>> For i as integer = 1 to 100000000 > >>>> do something > >>>> next > >>>> and retrieve the i at the moment of the interrupting > >>>> > >>>> Thanks for any response > >>>> > > > > > > > Hello Michel Posseth [MCP],
The loop could alternatively massage the message pump to keep a responsive UI. -Boo Show quoteHide quote > Note that this aproach will only succeed if the loop is started with a > asynchronous delegate > > Otherwise the form will simply freeze untill the loop has completed > and pressing the close button will result in a " This program is not > responding message " > > But for the rest you are right you can then set a boolean flag to jump > out of the loop and let the function or a property setter return the > value to the initial caller > > regards > > Michel Posseth [MCP] > > "GhostInAK" <ghosti***@gmail.com> schreef in bericht > news:c71747b4186fb8c865fbfa85872a@news.microsoft.com... > >> Hello Andreas, >> >> Ah, I misunderstood as well. If yer looking for how to interrupt at >> form close, perhaps for the purpose of continuing the long op at the >> next run.. it's pretty simple. >> >> Im the Form_QueryClose event set a varaible.. like bFormClosing to >> True.. Then in the loop ask the variable if the form is closing.. and >> if it is, exit the op. (Exit For). >> >> -Boo >> >>> No, Ahmed I am thinking at the event of closing my form. >>> >>> "Ahmed" <ahmed1***@gmail.com> wrote in message >>> news:1151183649.478586.29540@m73g2000cwd.googlegroups.com... >>>> Do you mean this: >>>> >>>> dim iAfterLoop as integer >>>> >>>> for i as integer =1 to 10000000 >>>> >>>> if i = something then >>>> iAfterloop = i >>>> end for >>>> end if >>>> next >>>> Ahmed >>>> andreas wrote: >>>>> When I do a long calculation is there a possibility to interrupt >>>>> this calculation properly? >>>>> >>>>> For i as integer = 1 to 100000000 >>>>> do something >>>>> next >>>>> and retrieve the i at the moment of the interrupting >>>>> Thanks for any response >>>>> > The loop could alternatively massage the message pump to keep a responsive and so wasting proces cycles ? > UI. However you are right it could work ,,, personally i would prefer ofcourse my example code wich has the highest performance and is most flexible regards Michel Posseth [MCP] Show quoteHide quote "GhostInAK" wrote: > Hello Michel Posseth [MCP], > > The loop could alternatively massage the message pump to keep a responsive > UI. > > -Boo > > > > Note that this aproach will only succeed if the loop is started with a > > asynchronous delegate > > > > Otherwise the form will simply freeze untill the loop has completed > > and pressing the close button will result in a " This program is not > > responding message " > > > > But for the rest you are right you can then set a boolean flag to jump > > out of the loop and let the function or a property setter return the > > value to the initial caller > > > > regards > > > > Michel Posseth [MCP] > > > > "GhostInAK" <ghosti***@gmail.com> schreef in bericht > > news:c71747b4186fb8c865fbfa85872a@news.microsoft.com... > > > >> Hello Andreas, > >> > >> Ah, I misunderstood as well. If yer looking for how to interrupt at > >> form close, perhaps for the purpose of continuing the long op at the > >> next run.. it's pretty simple. > >> > >> Im the Form_QueryClose event set a varaible.. like bFormClosing to > >> True.. Then in the loop ask the variable if the form is closing.. and > >> if it is, exit the op. (Exit For). > >> > >> -Boo > >> > >>> No, Ahmed I am thinking at the event of closing my form. > >>> > >>> "Ahmed" <ahmed1***@gmail.com> wrote in message > >>> news:1151183649.478586.29540@m73g2000cwd.googlegroups.com... > >>>> Do you mean this: > >>>> > >>>> dim iAfterLoop as integer > >>>> > >>>> for i as integer =1 to 10000000 > >>>> > >>>> if i = something then > >>>> iAfterloop = i > >>>> end for > >>>> end if > >>>> next > >>>> Ahmed > >>>> andreas wrote: > >>>>> When I do a long calculation is there a possibility to interrupt > >>>>> this calculation properly? > >>>>> > >>>>> For i as integer = 1 to 100000000 > >>>>> do something > >>>>> next > >>>>> and retrieve the i at the moment of the interrupting > >>>>> Thanks for any response > >>>>> > > > 
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