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Another question about memory : System.IO.StringWriter and DisposeI m' sorry for my questions .. Under framework 1.1 with vb.net, i m using a StringWriter object to export in .xls file. To empty memory, I would like to use the propterty dispose on the object StringWriter. But i have received an error like this : example : Dim myStringWriter As System.IO.StringWriter = New System.IO.StringWriter .... myStringWriter.Dispose(System.Boolean)(true) myStringWriter=Nothing >> Error BC30390: 'System.IO.StringWriter.Protected Overrides Sub Dispose(disposing As Boolean)' is not accessible in that context. it is protected.. I can use the Close() method but i m not sure that this last one have the same effects for Garbage Collector ? Is it possible to use Dispose method with StringWriter object Thanks for you help fabrice Fabrice,
The overloaded version you use is meant for the Idispose itself and not for direct use. You can rely on the standard version or just the quicker one, the close. (setting it to nothing is absolute without any sense after the close, where I assume that you have instanced in the method, and otherwise should try to do that). Cor Show quote "fabrice" <emouc***@test.com> schreef in bericht news:%23C9taF$BHHA.4256@TK2MSFTNGP04.phx.gbl... > > Re hello, > > I m' sorry for my questions .. > Under framework 1.1 with vb.net, i m using a StringWriter object to export > in .xls file. > To empty memory, I would like to use the propterty dispose on the object > StringWriter. > But i have received an error like this : > > example : > > Dim myStringWriter As System.IO.StringWriter = New System.IO.StringWriter > ... > myStringWriter.Dispose(System.Boolean)(true) > myStringWriter=Nothing > >>> Error > > BC30390: 'System.IO.StringWriter.Protected Overrides Sub Dispose(disposing > As Boolean)' is not accessible in that context. it is protected.. > > > I can use the Close() method but i m not sure that this last one have the > same effects for Garbage Collector ? > Is it possible to use Dispose method with StringWriter object > > > Thanks for you help > fabrice > > Call Dispose() and then set variable to nothing (the later might just speed
it up a bit or not) - that is the quickest way. -- Show quoteMiha Markic [MVP C#, INETA Country Leader for Slovenia] RightHand .NET consulting & development www.rthand.com Blog: http://cs.rthand.com/blogs/blog_with_righthand/ "fabrice" <emouc***@test.com> wrote in message news:%23C9taF$BHHA.4256@TK2MSFTNGP04.phx.gbl... > > Re hello, > > I m' sorry for my questions .. > Under framework 1.1 with vb.net, i m using a StringWriter object to export > in .xls file. > To empty memory, I would like to use the propterty dispose on the object > StringWriter. > But i have received an error like this : > > example : > > Dim myStringWriter As System.IO.StringWriter = New System.IO.StringWriter > ... > myStringWriter.Dispose(System.Boolean)(true) > myStringWriter=Nothing > >>> Error > > BC30390: 'System.IO.StringWriter.Protected Overrides Sub Dispose(disposing > As Boolean)' is not accessible in that context. it is protected.. > > > I can use the Close() method but i m not sure that this last one have the > same effects for Garbage Collector ? > Is it possible to use Dispose method with StringWriter object > > > Thanks for you help > fabrice > > Miha, it is normally slower, although it is probably only a clock tick.
I have however seen that C# programmers have more the habit to declare global than VB.Net programmers do. In that global situation it makes sense. Cor Show quote "Miha Markic [MVP C#]" <miha at rthand com> schreef in bericht news:627979F7-B366-48D2-9439-E4D533FE58AA@microsoft.com... > Call Dispose() and then set variable to nothing (the later might just > speed it up a bit or not) - that is the quickest way. > > -- > Miha Markic [MVP C#, INETA Country Leader for Slovenia] > RightHand .NET consulting & development www.rthand.com > Blog: http://cs.rthand.com/blogs/blog_with_righthand/ > > "fabrice" <emouc***@test.com> wrote in message > news:%23C9taF$BHHA.4256@TK2MSFTNGP04.phx.gbl... >> >> Re hello, >> >> I m' sorry for my questions .. >> Under framework 1.1 with vb.net, i m using a StringWriter object to >> export in .xls file. >> To empty memory, I would like to use the propterty dispose on the object >> StringWriter. >> But i have received an error like this : >> >> example : >> >> Dim myStringWriter As System.IO.StringWriter = New System.IO.StringWriter >> ... >> myStringWriter.Dispose(System.Boolean)(true) >> myStringWriter=Nothing >> >>>> Error >> >> BC30390: 'System.IO.StringWriter.Protected Overrides Sub >> Dispose(disposing As Boolean)' is not accessible in that context. it is >> protected.. >> >> >> I can use the Close() method but i m not sure that this last one have the >> same effects for Garbage Collector ? >> Is it possible to use Dispose method with StringWriter object >> >> >> Thanks for you help >> fabrice >> >> > Why do you think it is slower? It releases reference to the instance and
thus it is immediately available for GC. -- Show quoteMiha Markic [MVP C#, INETA Country Leader for Slovenia] RightHand .NET consulting & development www.rthand.com Blog: http://cs.rthand.com/blogs/blog_with_righthand/ "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message news:O5vHgWOCHHA.4680@TK2MSFTNGP04.phx.gbl... > Miha, it is normally slower, although it is probably only a clock tick. > > I have however seen that C# programmers have more the habit to declare > global than VB.Net programmers do. In that global situation it makes > sense. > > Cor > > "Miha Markic [MVP C#]" <miha at rthand com> schreef in bericht > news:627979F7-B366-48D2-9439-E4D533FE58AA@microsoft.com... >> Call Dispose() and then set variable to nothing (the later might just >> speed it up a bit or not) - that is the quickest way. >> >> -- >> Miha Markic [MVP C#, INETA Country Leader for Slovenia] >> RightHand .NET consulting & development www.rthand.com >> Blog: http://cs.rthand.com/blogs/blog_with_righthand/ >> >> "fabrice" <emouc***@test.com> wrote in message >> news:%23C9taF$BHHA.4256@TK2MSFTNGP04.phx.gbl... >>> >>> Re hello, >>> >>> I m' sorry for my questions .. >>> Under framework 1.1 with vb.net, i m using a StringWriter object to >>> export in .xls file. >>> To empty memory, I would like to use the propterty dispose on the object >>> StringWriter. >>> But i have received an error like this : >>> >>> example : >>> >>> Dim myStringWriter As System.IO.StringWriter = New >>> System.IO.StringWriter >>> ... >>> myStringWriter.Dispose(System.Boolean)(true) >>> myStringWriter=Nothing >>> >>>>> Error >>> >>> BC30390: 'System.IO.StringWriter.Protected Overrides Sub >>> Dispose(disposing As Boolean)' is not accessible in that context. it is >>> protected.. >>> >>> >>> I can use the Close() method but i m not sure that this last one have >>> the same effects for Garbage Collector ? >>> Is it possible to use Dispose method with StringWriter object >>> >>> >>> Thanks for you help >>> fabrice >>> >>> >> > > And what does that speed up. The GC runs the most optimal in Idle time.
Setting it to null/nothing means to run an instruction extra in processing time. While the reference was direct available before that setting to null, because without that setting to null/nothing it had already be gone out of scoop (assuming this is the last instruction in the method as it is showed).. cor Show quote "Miha Markic [MVP C#]" <miha at rthand com> schreef in bericht news:94B0B672-0EB2-45C6-AA9E-713A63B3DAA5@microsoft.com... > Why do you think it is slower? It releases reference to the instance and > thus it is immediately available for GC. > > -- > Miha Markic [MVP C#, INETA Country Leader for Slovenia] > RightHand .NET consulting & development www.rthand.com > Blog: http://cs.rthand.com/blogs/blog_with_righthand/ > > "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message > news:O5vHgWOCHHA.4680@TK2MSFTNGP04.phx.gbl... >> Miha, it is normally slower, although it is probably only a clock tick. >> >> I have however seen that C# programmers have more the habit to declare >> global than VB.Net programmers do. In that global situation it makes >> sense. >> >> Cor >> >> "Miha Markic [MVP C#]" <miha at rthand com> schreef in bericht >> news:627979F7-B366-48D2-9439-E4D533FE58AA@microsoft.com... >>> Call Dispose() and then set variable to nothing (the later might just >>> speed it up a bit or not) - that is the quickest way. >>> >>> -- >>> Miha Markic [MVP C#, INETA Country Leader for Slovenia] >>> RightHand .NET consulting & development www.rthand.com >>> Blog: http://cs.rthand.com/blogs/blog_with_righthand/ >>> >>> "fabrice" <emouc***@test.com> wrote in message >>> news:%23C9taF$BHHA.4256@TK2MSFTNGP04.phx.gbl... >>>> >>>> Re hello, >>>> >>>> I m' sorry for my questions .. >>>> Under framework 1.1 with vb.net, i m using a StringWriter object to >>>> export in .xls file. >>>> To empty memory, I would like to use the propterty dispose on the >>>> object StringWriter. >>>> But i have received an error like this : >>>> >>>> example : >>>> >>>> Dim myStringWriter As System.IO.StringWriter = New >>>> System.IO.StringWriter >>>> ... >>>> myStringWriter.Dispose(System.Boolean)(true) >>>> myStringWriter=Nothing >>>> >>>>>> Error >>>> >>>> BC30390: 'System.IO.StringWriter.Protected Overrides Sub >>>> Dispose(disposing As Boolean)' is not accessible in that context. it is >>>> protected.. >>>> >>>> >>>> I can use the Close() method but i m not sure that this last one have >>>> the same effects for Garbage Collector ? >>>> Is it possible to use Dispose method with StringWriter object >>>> >>>> >>>> Thanks for you help >>>> fabrice >>>> >>>> >>> >> >> > "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message You don't know when GC kicks in.news:uSJ%23RBPCHHA.3600@TK2MSFTNGP06.phx.gbl... > And what does that speed up. The GC runs the most optimal in Idle time. > And that potentially speeds up the garbage collection of instance. I was > Setting it to null/nothing means to run an instruction extra in processing > time. under impression that OP was asking how to speed up the collection. Now that I reread the thread i am not sure anymore. -- Miha Markic [MVP C#, INETA Country Leader for Slovenia] RightHand .NET consulting & development www.rthand.com Blog: http://cs.rthand.com/blogs/blog_with_righthand/  |
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