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POEnterprise Logging not translating environment variables in XML Trace Listener fileName specification
 

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    <p>I am using Microsoft Enterprise Library 5.0 Optional Update 1 for logging. I've got a declared section in my app.config file as follows:</p> <pre><code> &lt;loggingConfiguration name="LLamasoftLoggingConfiguration" tracingEnabled="true" defaultCategory="General"&gt; &lt;listeners&gt; &lt;add name="XML Trace Listener" type="Microsoft.Practices.EnterpriseLibrary.Logging.TraceListeners.XmlTraceListener, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.505.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.XmlTraceListenerData, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.505.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" fileName="%ALLUSERSPROFILE%\CompanyName\AppName\Diagnostics\ErrorLog.xml" traceOutputOptions="None" /&gt; &lt;/listeners&gt; ... &lt;/loggingConfiguration&gt; </code></pre> <p>When I run the application and get down to using the logging, e.g.,</p> <pre><code> logWriter = Microsoft.Practices.EnterpriseLibrary.Common.Configuration.EnterpriseLibraryContainer.Current.GetInstance&lt;LogWriter&gt;(); logWriter.Write(logEntry); </code></pre> <p>I'll get a DirectoryNotFoundException with the text: Could not find a part of the path <code>'D:\Project\Application\bin\x86\Debug\%ALLUSERSPROFILE%\CompanyName\AppName\Diagnostics\ErrorLog.xml'.</code></p> <p>When I use an absolute path like <code>'C:\ProgramData\CompanyName\AppName\Diagnostics\ErrorLog.xml'</code> it works.</p> <p>I see a number of references saying I should be able to use environment vars in the log file path but, no matter which I try, they get appended to the current execution directory path. The references also say that the logging system will create the folder if it does not exist but I have to ensure that it exists.</p> <p>This is my first use of the Enterprise Logging application block so I don't know whether the behavior has changed between versions and if this one just has these quirks. For now, I've hard-coded the path into my app.config file but for the final version this should be dynamically determined.</p> <p>Suggestions appreciated.</p>
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