debugging - Break on value change?

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QAIX > .Net Development > debugging - Break on value change? 5 August 2008 15:39:24

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debugging - Break on value change?
Graeme Hood 5 August 2008 15:39:24
	I'm trying to find out where and when a value in a session variable is gettting changed. I know I can use conditional breakpoints, but then I would need to know what line of code to insert it into. Is there such a thing as a condition watch that will stop execution as soon as a variable has a specified value? Using VS 2008. TIA This email message is intended only for the use of the named recipient. Information contained in this email message and its attachments may be privileged, confidential and protected from disclosure. If you are not the intended recipient, please do not read, copy, use or disclose this communication to others. Also please notify the sender by replying to this message and then delete it from your system. =================================== This list is hosted by DevelopMentor http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
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Peter Vertes 4 August 2008 14:52:04 [ permanent link ]
	I always wanted a feature like that in a debugger but unfortunately I don't think the debugged that comes with Visual Studio has it. You might want to try a debugger called Mole ( http://www.codeproject.com/KB/macros/MoleForVisualStudioEdit.aspx) that might be able to do it for you. You can also try using Trace Point instead of Break Points in your code if Mole doesn't work out for you. -Pete On Mon, Aug 4, 2008 at 10:20 AM, Graeme Hood <G.Hood@iaea.org> wrote: I'm trying to find out where and when a value in a session variable is gettting changed. I know I can use conditional breakpoints, but then I would need to know what line of code to insert it into. Is there such a thing as a condition watch that will stop execution as soon as a variable has a specified value? Using VS 2008. TIA This email message is intended only for the use of the named recipient. Information contained in this email message and its attachments may be privileged, confidential and protected from disclosure. If you are not the intended recipient, please do not read, copy, use or disclose this communication to others. Also please notify the sender by replying to this message and then delete it from your system. =================================== This list is hosted by DevelopMentor(R) http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentor® http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
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Mike Andrews 4 August 2008 19:12:27 [ permanent link ]
	This was a well loved feature by me in VB4, 5, and 6. Recently I needed this feature as well just to know when a value had changed regardless of the line on which it occurred but alas, the VS debugger has no such feature. I really hope they implement this feature in a coming version. On Mon, Aug 4, 2008 at 9:20 AM, Graeme Hood <G.Hood@iaea.org> wrote: I'm trying to find out where and when a value in a session variable is gettting changed. I know I can use conditional breakpoints, but then I would need to know what line of code to insert it into. Is there such a thing as a condition watch that will stop execution as soon as a variable has a specified value? Using VS 2008. TIA This email message is intended only for the use of the named recipient. Information contained in this email message and its attachments may be privileged, confidential and protected from disclosure. If you are not the intended recipient, please do not read, copy, use or disclose this communication to others. Also please notify the sender by replying to this message and then delete it from your system. =================================== This list is hosted by DevelopMentor(R) http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentor® http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
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Chris Anderson 4 August 2008 19:15:04 [ permanent link ]
	Move access to the variable into a property get/set accessor (which will actually result in your code reading better anyway) Then put a breakpoint in the setter function (perhaps with a condition on the new value being differernt to the current one) ________________________________ From: Discussion of building .NET applications targeted for the Web on behalf of Graeme Hood Sent: Mon 04/08/2008 15:30 To: DOTNET-WEB@DISCUSS.DEVELOP.COM Subject: [DOTNET-WEB] debugging - Break on value change? I'm trying to find out where and when a value in a session variable is gettting changed. I know I can use conditional breakpoints, but then I would need to know what line of code to insert it into. Is there such a thing as a condition watch that will stop execution as soon as a variable has a specified value? Using VS 2008. =================================== This list is hosted by DevelopMentor® http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
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Graeme Hood 4 August 2008 19:15:49 [ permanent link ]
	Thanks for the tips - Mole looks pretty amazing, and I didn't know about tracepoints, but both still mean I have to know where my session contents are being changed in order to set a breakpoint. I need something that just sits on top and watches for a specific value change as I run the app. -----Original Message----- From: Discussion of building .NET applications targeted for the Web [mailtoOTNET-WEB@DISCUSS.DEVELOP.COM] On Behalf Of Peter Vertes Sent: Monday, 04 August 2008 16:38 To: DOTNET-WEB@DISCUSS.DEVELOP.COM Subject: Re: [DOTNET-WEB] debugging - Break on value change? I always wanted a feature like that in a debugger but unfortunately I don't think the debugged that comes with Visual Studio has it. You might want to try a debugger called Mole ( http://www.codeproject.com/KB/macros/MoleForVisualStudioEdit.aspx) that might be able to do it for you. You can also try using Trace Point instead of Break Points in your code if Mole doesn't work out for you. -Pete On Mon, Aug 4, 2008 at 10:20 AM, Graeme Hood <G.Hood@iaea.org> wrote: I'm trying to find out where and when a value in a session variable is gettting changed. I know I can use conditional breakpoints, but then I would need to know what line of code to insert it into. Is there such a thing as a condition watch that will stop execution as soon as a variable has a specified value? Using VS 2008. TIA This email message is intended only for the use of the named recipient. Information contained in this email message and its attachments may be privileged, confidential and protected from disclosure. If you are not the intended recipient, please do not read, copy, use or disclose this communication to others. Also please notify the sender by replying to this message and then delete it from your system. =================================== This list is hosted by DevelopMentor(R) http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentor(r) http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentor http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
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Graeme Hood 5 August 2008 11:27:10 [ permanent link ]
	It's actually a collection that is stored in the session at application startup in global.asax and from then on only accessed from the session variable. I see nowhere in the code that the session is written to after global.asax, yet on a page load event after a sequence of events, the collection has changed. Guess I need to understand how session works more. Anyone got a good explanatory link? -----Original Message----- From: Discussion of building .NET applications targeted for the Web [mailtoOTNET-WEB@DISCUSS.DEVELOP.COM] On Behalf Of Chris Anderson Sent: Monday, 04 August 2008 17:15 To: DOTNET-WEB@DISCUSS.DEVELOP.COM Subject: Re: [DOTNET-WEB] debugging - Break on value change? Move access to the variable into a property get/set accessor (which will actually result in your code reading better anyway) Then put a breakpoint in the setter function (perhaps with a condition on the new value being differernt to the current one) ________________________________ From: Discussion of building .NET applications targeted for the Web on behalf of Graeme Hood Sent: Mon 04/08/2008 15:30 To: DOTNET-WEB@DISCUSS.DEVELOP.COM Subject: [DOTNET-WEB] debugging - Break on value change? I'm trying to find out where and when a value in a session variable is gettting changed. I know I can use conditional breakpoints, but then I would need to know what line of code to insert it into. Is there such a thing as a condition watch that will stop execution as soon as a variable has a specified value? Using VS 2008. =================================== This list is hosted by DevelopMentor(r) http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com This email message is intended only for the use of the named recipient. Information contained in this email message and its attachments may be privileged, confidential and protected from disclosure. If you are not the intended recipient, please do not read, copy, use or disclose this communication to others. Also please notify the sender by replying to this message and then delete it from your system. =================================== This list is hosted by DevelopMentor http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
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Chris Anderson 5 August 2008 15:39:24 [ permanent link ]
	That sounds like the session is storing a reference to the collection - but there's other code that also has a reference to the same collection, changing it via that reference. I would track where references are obtained from the session, and examine those objects instead. The reference the session hasn't changed - the object it points to has. i.e. (pseudo-code) theCollection = Session["theCollection"]; (later) theCollection.Add(new Thing()); - The collection that the session refers to was only read once - and yet has been changed ________________________________ From: Discussion of building .NET applications targeted for the Web on behalf of Graeme Hood Sent: Tue 05/08/2008 08:45 To: DOTNET-WEB@DISCUSS.DEVELOP.COM Subject: Re: [DOTNET-WEB] debugging - Break on value change? It's actually a collection that is stored in the session at application startup in global.asax and from then on only accessed from the session variable. I see nowhere in the code that the session is written to after global.asax, yet on a page load event after a sequence of events, the collection has changed. Guess I need to understand how session works more. Anyone got a good explanatory link? -----Original Message----- From: Discussion of building .NET applications targeted for the Web [mailtoOTNET-WEB@DISCUSS.DEVELOP.COM] On Behalf Of Chris Anderson Sent: Monday, 04 August 2008 17:15 To: DOTNET-WEB@DISCUSS.DEVELOP.COM Subject: Re: [DOTNET-WEB] debugging - Break on value change? Move access to the variable into a property get/set accessor (which will actually result in your code reading better anyway) Then put a breakpoint in the setter function (perhaps with a condition on the new value being differernt to the current one) =================================== This list is hosted by DevelopMentor® http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
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QAIX > .Net Development > debugging - Break on value change? 5 August 2008 15:39:24

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debugging - Break on value change?

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