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<title>FileAppender Class</title>
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<td class="runninghead">log4net SDK Reference</td>
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<h1 class="dtH1">FileAppender Class</h1>
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<p> Appends logging events to a file. </p>
<p>For a list of all members of this type, see <a href="log4net.Appender.FileAppenderMembers.html">FileAppender Members</a>.</p>
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<a href="http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfSystemObjectClassTopic.asp">System.Object</a>
<br /><a href="log4net.Appender.AppenderSkeleton.html">log4net.Appender.AppenderSkeleton</a><br /><a href="log4net.Appender.TextWriterAppender.html">log4net.Appender.TextWriterAppender</a><br /><b>log4net.Appender.FileAppender</b><br /><a href="log4net.Appender.RollingFileAppender.html">log4net.Appender.RollingFileAppender</a></p>
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<span class="lang">[VisualBasic]</span>
<br />PublicClassFileAppender<div>Inherits<a href="log4net.Appender.TextWriterAppender.html">TextWriterAppender</a></div></div>
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<span class="lang">[C#]</span>
<div>publicclassFileAppender<b> : <a href="log4net.Appender.TextWriterAppender.html">TextWriterAppender</a></b></div>
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<H4 class="dtH4">Thread Safety</H4>
<P>This type is <b>not</b> safe for multithreaded operations.</P>
<h4 class="dtH4">Remarks</h4>
<p> Logging events are sent to the file specified by the <a href="log4net.Appender.FileAppender.File.html">File</a> property. </p>
<p> The file can be opened in either append or overwrite mode by specifying the <a href="log4net.Appender.FileAppender.AppendToFile.html">AppendToFile</a> property. If the file path is relative it is taken as relative from the application base directory. The file encoding can be specified by setting the <a href="log4net.Appender.FileAppender.Encoding.html">Encoding</a> property. </p>
<p> The layout's <a href="log4net.Layout.ILayout.Header.html">Header</a> and <a href="log4net.Layout.ILayout.Footer.html">Footer</a> values will be written each time the file is opened and closed respectively. If the <b>AppendToFile</b> property is <b>true</b> then the file may contain multiple copies of the header and footer. </p>
<p> This appender will first try to open the file for writing when <a href="log4net.Appender.FileAppender.ActivateOptions.html">ActivateOptions</a> is called. This will typically be during configuration. If the file cannot be opened for writing the appender will attempt to open the file again each time a message is logged to the appender. If the file cannot be opened for writing when a message is logged then the message will be discarded by this appender. </p>
<p> The <b>FileAppender</b> supports pluggable file locking models via the <a href="log4net.Appender.FileAppender.LockingModel.html">LockingModel</a> property. The default behavior, implemented by <a href="log4net.Appender.FileAppender.ExclusiveLock.html">FileAppender.ExclusiveLock</a> is to obtain an exclusive write lock on the file until this appender is closed. The alternative model, <a href="log4net.Appender.FileAppender.MinimalLock.html">FileAppender.MinimalLock</a>, only holds a write lock while the appender is writing a logging event. </p>
<h4 class="dtH4">Requirements</h4><p><b>Namespace: </b><a href="log4net.Appender.html">log4net.Appender</a></p><p><b>Assembly: </b>log4net (in log4net.dll)
</p><h4 class="dtH4">See Also</h4><p><a href="log4net.Appender.FileAppenderMembers.html">FileAppender Members</a> | <a href="log4net.Appender.html">log4net.Appender Namespace</a></p><hr /><div id="footer"><p><a href="http://logging.apache.org/log4net">Copyright 2001-2006 The Apache Software Foundation.</a></p><p>Generated from assembly log4net [1.2.10.0]</p></div></div>
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