|
web
newsgroups
|
|||||||||||||||||||||||
|
|||||||||||||||||||||||
Using Special Folders in App.ConfigHow do you define one of the special folders in an App.Config file? For example, if one wanted to
refer to the user's temp directory in code it would be: My.Computer.FileSystem.SpecialDirectories.Temp.ToString() I want to define a trace output file in the user's temp directory using the application's configuration file. What should the xml look like? Hi Stewart,
I'm afraid there is no other way to create the trace log file in the temp directory except using code. Dim logFilename As String Dim listener As TraceListener logFilename = Path.Combine(Path.GetTempPath(), "my.log") listener = New TextWriterTraceListener(logFilename) Trace.Listeners.Add(listener) Trace.WriteLine("App started: " & DateTime.Now) I once tried using envrionment variable like this: <add name="myListener" type="System.Diagnostics.TextWriterTraceListener, system, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" initializeData="%temp%\my.log" /> But eventually the %temp% was not expanded to its real value at runtime (the TextWriterTraceListener actually calls Path.GetFullPath of the path specified in config file but that method won't expand the environment variables). So you need to add some code to config the listener at runtime to get the log file written to user's temp directory. Best regards, Jie Wang Microsoft Online Community Support Delighting our customers is our #1 priority. We welcome your comments and suggestions about how we can improve the support we provide to you. Please feel free to let my manager know what you think of the level of service provided. You can send feedback directly to my manager at: msd***@microsoft.com. ================================================== Get notification to my posts through email? Please refer to http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications. Note: MSDN Managed Newsgroup support offering is for non-urgent issues where an initial response from the community or a Microsoft Support Engineer within 2 business days is acceptable. Please note that each follow up response may take approximately 2 business days as the support professional working with you may need further investigation to reach the most efficient resolution. The offering is not appropriate for situations that require urgent, real-time or phone-based interactions. Issues of this nature are best handled working with a dedicated Microsoft Support Engineer by contacting Microsoft Customer Support Services (CSS) at http://msdn.microsoft.com/en-us/subscriptions/aa948874.aspx ================================================== This posting is provided "AS IS" with no warranties, and confers no rights. >system, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" How do you know what to use for Version (or system version -- see below) and PublicKeyToken? For>initializeData="%temp%\my.log" /> example, http://msdn.microsoft.com/en-us/library/xe8whywc.aspx has: <add name="myListener" type="System.Diagnostics.TextWriterTraceListener, system version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" initializeData="c:\myListener.log" /> as an example. jie***@online.microsoft.com ("Jie Wang [MSFT]") wrote: Show quoteHide quote >Hi Stewart, > >I'm afraid there is no other way to create the trace log file in the temp >directory except using code. > >Dim logFilename As String >Dim listener As TraceListener > >logFilename = Path.Combine(Path.GetTempPath(), "my.log") >listener = New TextWriterTraceListener(logFilename) > >Trace.Listeners.Add(listener) >Trace.WriteLine("App started: " & DateTime.Now) > >I once tried using envrionment variable like this: ><add name="myListener" type="System.Diagnostics.TextWriterTraceListener, >system, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >initializeData="%temp%\my.log" /> > >But eventually the %temp% was not expanded to its real value at runtime >(the TextWriterTraceListener actually calls Path.GetFullPath of the path >specified in config file but that method won't expand the environment >variables). > >So you need to add some code to config the listener at runtime to get the >log file written to user's temp directory. > >Best regards, > >Jie Wang > >Microsoft Online Community Support > >Delighting our customers is our #1 priority. We welcome your comments and >suggestions about how we can improve the support we provide to you. Please >feel free to let my manager know what you think of the level of service >provided. You can send feedback directly to my manager at: >msd***@microsoft.com. > >================================================== >Get notification to my posts through email? Please refer to >http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications. > >Note: MSDN Managed Newsgroup support offering is for non-urgent issues >where an initial response from the community or a Microsoft Support >Engineer within 2 business days is acceptable. Please note that each follow >up response may take approximately 2 business days as the support >professional working with you may need further investigation to reach the >most efficient resolution. The offering is not appropriate for situations >that require urgent, real-time or phone-based interactions. Issues of this >nature are best handled working with a dedicated Microsoft Support Engineer >by contacting Microsoft Customer Support Services (CSS) at >http://msdn.microsoft.com/en-us/subscriptions/aa948874.aspx >================================================== >This posting is provided "AS IS" with no warranties, and confers no rights. > How do you know what to use for Version (or system version -- Several ways to get that, either by code or by tools. Let me give one > see below) and PublicKeyToken? sample for each way. By code: Dim asmQualifiedName As String asmQualifiedName = GetType(TextWriterTraceListener).AssemblyQualifiedName You will now have the following string in asmQualifiedName: System.Diagnostics.TextWriterTraceListener, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 By tool: Use the .NET Reflector. If you don't have it, I strongly recommend it, a must have everyday tool for .NET developers. Select the System assembly in the .NET Reflector, you'll see the name of the assembly: System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 You can get .NET reflector here: http://www.red-gate.com/products/reflector/ Disclaimer: the link above is a 3rd party website not owned nor controlled by Microsoft, use it at your own risk. Hope this helps. Regards, Jie Wang Microsoft Online Community Support Delighting our customers is our #1 priority. We welcome your comments and suggestions about how we can improve the support we provide to you. Please feel free to let my manager know what you think of the level of service provided. You can send feedback directly to my manager at: msd***@microsoft.com. ================================================== Get notification to my posts through email? Please refer to http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications. Note: MSDN Managed Newsgroup support offering is for non-urgent issues where an initial response from the community or a Microsoft Support Engineer within 2 business days is acceptable. Please note that each follow up response may take approximately 2 business days as the support professional working with you may need further investigation to reach the most efficient resolution. The offering is not appropriate for situations that require urgent, real-time or phone-based interactions. Issues of this nature are best handled working with a dedicated Microsoft Support Engineer by contacting Microsoft Customer Support Services (CSS) at http://msdn.microsoft.com/en-us/subscriptions/aa948874.aspx ================================================== This posting is provided "AS IS" with no warranties, and confers no rights. >(the TextWriterTraceListener actually calls Path.GetFullPath of the path Sounds like an oversight. >specified in config file but that method won't expand the environment >variables). >So you need to add some code to config the listener at runtime to get the If the trace file is defined in the application's configuration file it is availble to the first bit>log file written to user's temp directory. of code that uses trace. To create the trace listener in code you have to find the earliest point in the code that might use it -- which can be a bit of a problem. jie***@online.microsoft.com ("Jie Wang [MSFT]") wrote: Show quoteHide quote >Hi Stewart, > >I'm afraid there is no other way to create the trace log file in the temp >directory except using code. > >Dim logFilename As String >Dim listener As TraceListener > >logFilename = Path.Combine(Path.GetTempPath(), "my.log") >listener = New TextWriterTraceListener(logFilename) > >Trace.Listeners.Add(listener) >Trace.WriteLine("App started: " & DateTime.Now) > >I once tried using envrionment variable like this: ><add name="myListener" type="System.Diagnostics.TextWriterTraceListener, >system, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >initializeData="%temp%\my.log" /> > >But eventually the %temp% was not expanded to its real value at runtime >(the TextWriterTraceListener actually calls Path.GetFullPath of the path >specified in config file but that method won't expand the environment >variables). > >So you need to add some code to config the listener at runtime to get the >log file written to user's temp directory. > >Best regards, > >Jie Wang > >Microsoft Online Community Support > >Delighting our customers is our #1 priority. We welcome your comments and >suggestions about how we can improve the support we provide to you. Please >feel free to let my manager know what you think of the level of service >provided. You can send feedback directly to my manager at: >msd***@microsoft.com. > >================================================== >Get notification to my posts through email? Please refer to >http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications. > >Note: MSDN Managed Newsgroup support offering is for non-urgent issues >where an initial response from the community or a Microsoft Support >Engineer within 2 business days is acceptable. Please note that each follow >up response may take approximately 2 business days as the support >professional working with you may need further investigation to reach the >most efficient resolution. The offering is not appropriate for situations >that require urgent, real-time or phone-based interactions. Issues of this >nature are best handled working with a dedicated Microsoft Support Engineer >by contacting Microsoft Customer Support Services (CSS) at >http://msdn.microsoft.com/en-us/subscriptions/aa948874.aspx >================================================== >This posting is provided "AS IS" with no warranties, and confers no rights. >If the trace file is defined in the application's configuration file it is availble to the first bit <Forgive replying to my own post -- I need to add something>>of code that uses trace. To create the trace listener in code you have to find the earliest point >in the code that might use it -- which can be a bit of a problem. I am trying to figure out where to put the trace listener's creation using the %Temp% environment variable in the code. I ran a trace of everything during application startup: 20090709 23:17:18.759: .ctor Tracing Started 20090709 23:17:18.790: MyApplication creator 20090709 23:17:18.790: .ctor Tracing Ended 20090709 23:17:18.821: OnCreateSplashScreen Tracing Started 20090709 23:17:18.821: .ctor Tracing Started 20090709 23:17:18.821: Splash Screen Creator 20090709 23:17:18.931: .ctor Tracing Ended 20090709 23:17:18.931: OnCreateSplashScreen Tracing Ended 20090709 23:17:18.931: MyApplication_Startup Tracing Started 20090709 23:17:18.931: MyApplication_Startup Tracing Ended 20090709 23:17:18.931: OnCreateMainForm Tracing Started 20090709 23:17:18.931: SplashScreen_Load Tracing Started 20090709 23:17:18.946: .ctor Tracing Started 20090709 23:17:18.946: MyApplication creator 20090709 23:17:18.946: .ctor Tracing Ended 20090709 23:17:18.946: Ver18ion: 1.0.0.72 20090709 23:17:18.946: SplashScreen_Load Tracing Ended The first .ctor is the creator (New method) in the Application.Designer.vb file for the MyApplication class. Unfortunately, this code is auto generated has a big warning: ' Changes to this file may cause incorrect behavior and will be lost if ' the code is regenerated. The MyApplicatoin_Startup method is not called until after the Splash Screen's creator (New method) is called. However, it appears the earliest safe point to put the trace listener's creation code. Stewart Berman <saberman@nospam.nospam> wrote: Show quoteHide quote >>(the TextWriterTraceListener actually calls Path.GetFullPath of the path >>specified in config file but that method won't expand the environment >>variables). > >Sounds like an oversight. > >>So you need to add some code to config the listener at runtime to get the >>log file written to user's temp directory. > >If the trace file is defined in the application's configuration file it is availble to the first bit >of code that uses trace. To create the trace listener in code you have to find the earliest point >in the code that might use it -- which can be a bit of a problem. > >jie***@online.microsoft.com ("Jie Wang [MSFT]") wrote: > >>Hi Stewart, >> >>I'm afraid there is no other way to create the trace log file in the temp >>directory except using code. >> >>Dim logFilename As String >>Dim listener As TraceListener >> >>logFilename = Path.Combine(Path.GetTempPath(), "my.log") >>listener = New TextWriterTraceListener(logFilename) >> >>Trace.Listeners.Add(listener) >>Trace.WriteLine("App started: " & DateTime.Now) >> >>I once tried using envrionment variable like this: >><add name="myListener" type="System.Diagnostics.TextWriterTraceListener, >>system, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >>initializeData="%temp%\my.log" /> >> >>But eventually the %temp% was not expanded to its real value at runtime >>(the TextWriterTraceListener actually calls Path.GetFullPath of the path >>specified in config file but that method won't expand the environment >>variables). >> >>So you need to add some code to config the listener at runtime to get the >>log file written to user's temp directory. >> >>Best regards, >> >>Jie Wang >> >>Microsoft Online Community Support >> >>Delighting our customers is our #1 priority. We welcome your comments and >>suggestions about how we can improve the support we provide to you. Please >>feel free to let my manager know what you think of the level of service >>provided. You can send feedback directly to my manager at: >>msd***@microsoft.com. >> >>================================================== >>Get notification to my posts through email? Please refer to >>http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications. >> >>Note: MSDN Managed Newsgroup support offering is for non-urgent issues >>where an initial response from the community or a Microsoft Support >>Engineer within 2 business days is acceptable. Please note that each follow >>up response may take approximately 2 business days as the support >>professional working with you may need further investigation to reach the >>most efficient resolution. The offering is not appropriate for situations >>that require urgent, real-time or phone-based interactions. Issues of this >>nature are best handled working with a dedicated Microsoft Support Engineer >>by contacting Microsoft Customer Support Services (CSS) at >>http://msdn.microsoft.com/en-us/subscriptions/aa948874.aspx >>================================================== >>This posting is provided "AS IS" with no warranties, and confers no rights. Let me share some of my thoughts:
1. The MyApplication.Startup event should be a safe place to initialize the TraceListeners. This event is designed to let developers to put their initialization logics in it. Usually we don't put our own code before this point. The splash screen usually doesn't contain code that need to be traced, or consider move the code to the Startup event handler. 2. If your application is single instance - that is, only one instance is allowed to run for one logged on user, and you want to trace the follow up instances (althought they will quite right away), you can add trace code in the MyApplication.StartupNextInstance event. For more details, see: http://msdn.microsoft.com/en-us/library/t4zch4d2(VS.80).aspx 3. If you use code to set the trace file path (into the %temp% dir), no need to use environment variable, just use Path.GetTempPath method will do: Path.Combine(Path.GetTempPath(), "my.log") Regards, Jie Wang Microsoft Online Community Support Delighting our customers is our #1 priority. We welcome your comments and suggestions about how we can improve the support we provide to you. Please feel free to let my manager know what you think of the level of service provided. You can send feedback directly to my manager at: msd***@microsoft.com. ================================================== Get notification to my posts through email? Please refer to http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications. Note: MSDN Managed Newsgroup support offering is for non-urgent issues where an initial response from the community or a Microsoft Support Engineer within 2 business days is acceptable. Please note that each follow up response may take approximately 2 business days as the support professional working with you may need further investigation to reach the most efficient resolution. The offering is not appropriate for situations that require urgent, real-time or phone-based interactions. Issues of this nature are best handled working with a dedicated Microsoft Support Engineer by contacting Microsoft Customer Support Services (CSS) at http://msdn.microsoft.com/en-us/subscriptions/aa948874.aspx ================================================== This posting is provided "AS IS" with no warranties, and confers no rights.  
Other interesting topics
|
|||||||||||||||||||||||
