﻿<html><head><meta http-equiv="X-UA-Compatible" content="IE=edge" /><link rel="shortcut icon" href="../icons/favicon.ico" /><style type="text/css">.OH_CodeSnippetContainerTabLeftActive, .OH_CodeSnippetContainerTabLeft,.OH_CodeSnippetContainerTabLeftDisabled { }.OH_CodeSnippetContainerTabRightActive, .OH_CodeSnippetContainerTabRight,.OH_CodeSnippetContainerTabRightDisabled { }.OH_footer { }</style><link rel="stylesheet" type="text/css" href="../styles/branding.css" /><link rel="stylesheet" type="text/css" href="../styles/branding-en-US.css" /><script type="text/javascript" src="../scripts/branding.js"> </script><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>EventLogAppender Class</title><meta name="Language" content="en-us" /><meta name="System.Keywords" content="EventLogAppender class" /><meta name="System.Keywords" content="log4net.Appender.EventLogAppender class" /><meta name="System.Keywords" content="EventLogAppender class, about EventLogAppender class" /><meta name="Microsoft.Help.F1" content="log4net.Appender.EventLogAppender" /><meta name="Microsoft.Help.Id" content="T:log4net.Appender.EventLogAppender" /><meta name="Description" content="Writes events to the system event log." /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="BrandingAware" content="true" /><meta name="container" content="log4net.Appender" /><meta name="file" content="T_log4net_Appender_EventLogAppender" /><meta name="guid" content="T_log4net_Appender_EventLogAppender" /><link type="text/css" rel="stylesheet" href="../styles/highlight.css" /><script type="text/javascript" src="../scripts/highlight.js"> </script></head><body onload="OnLoad('cs')"><input type="hidden" id="userDataCache" class="userDataStyle" /><div class="OH_outerDiv"><div class="OH_outerContent"><table class="TitleTable"><tr><td class="OH_tdTitleColumn">EventLogAppender Class</td><td class="OH_tdRunningTitleColumn">Apache log4net™ SDK Documentation</td></tr></table><div id="mainSection"><div id="mainBody"><span class="introStyle"></span><div class="summary">
            Writes events to the system event log.
            </div><div class="OH_CollapsibleAreaRegion"><div class="OH_regiontitle">Inheritance Hierarchy</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"> </div><a href="http://msdn2.microsoft.com/en-us/library/e5kfa45b" target="_blank">System<span id="LST8120C0C5_0"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST8120C0C5_0?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>Object</a><br />  <a href="T_log4net_Appender_AppenderSkeleton.htm">log4net.Appender<span id="LST8120C0C5_1"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST8120C0C5_1?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>AppenderSkeleton</a><br />    <span class="selflink">log4net.Appender<span id="LST8120C0C5_2"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST8120C0C5_2?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>EventLogAppender</span><br /><p> </p><strong>Namespace:</strong> <a href="N_log4net_Appender.htm">log4net.Appender</a><br /><strong>Assembly:</strong> log4net (in log4net.dll) Version: 2.0.6.0-.NET 4.0<div class="OH_CollapsibleAreaRegion"><div class="OH_regiontitle">Syntax</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"> </div><div class="OH_CodeSnippetContainer"><div class="OH_CodeSnippetContainerTabs"><div class="OH_CodeSnippetContainerTabLeft" id="ID0EDCA_tabimgleft"> </div><div id="ID0EDCA_tab1" class="OH_CodeSnippetContainerTabFirst"><a href="#" onclick="javascript:ChangeTab('ID0EDCA','cs','1','4');return false;">C#</a></div><div id="ID0EDCA_tab2" class="OH_CodeSnippetContainerTab"><a href="#" onclick="javascript:ChangeTab('ID0EDCA','vb','2','4');return false;">VB</a></div><div id="ID0EDCA_tab3" class="OH_CodeSnippetContainerTab"><a href="#" onclick="javascript:ChangeTab('ID0EDCA','cpp','3','4');return false;">C++</a></div><div id="ID0EDCA_tab4" class="OH_CodeSnippetContainerTab"><a href="#" onclick="javascript:ChangeTab('ID0EDCA','fs','4','4');return false;">F#</a></div><div class="OH_CodeSnippetContainerTabRight" id="ID0EDCA_tabimgright"> </div></div><div class="OH_CodeSnippetContainerCodeCollection"><div class="OH_CodeSnippetToolBar"><div class="OH_CodeSnippetToolBarText"><a id="ID0EDCA_copyCode" href="#" onclick="javascript:CopyToClipboard('ID0EDCA');return false;" title="Copy">Copy</a></div></div><div id="ID0EDCA_code_Div1" class="OH_CodeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">class</span> <span class="identifier">EventLogAppender</span> : <span class="identifier">AppenderSkeleton</span></pre></div><div id="ID0EDCA_code_Div2" class="OH_CodeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Class</span> <span class="identifier">EventLogAppender</span>
	<span class="keyword">Inherits</span> <span class="identifier">AppenderSkeleton</span></pre></div><div id="ID0EDCA_code_Div3" class="OH_CodeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">ref class</span> <span class="identifier">EventLogAppender</span> : <span class="keyword">public</span> <span class="identifier">AppenderSkeleton</span></pre></div><div id="ID0EDCA_code_Div4" class="OH_CodeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">type</span> <span class="identifier">EventLogAppender</span> =  
    <span class="keyword">class</span>
        <span class="keyword">inherit</span> <span class="identifier">AppenderSkeleton</span>
    <span class="keyword">end</span></pre></div></div></div><script type="text/javascript">AddLanguageTabSet("ID0EDCA");</script><p>The <span class="selflink">EventLogAppender</span> type exposes the following members.</p><div class="OH_CollapsibleAreaRegion"><div class="OH_regiontitle">Constructors</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"> </div><table id="memberList" class="members"><tr><th class="ps_iconColumn">
								 
							</th><th>Name</th><th>Description</th></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="M_log4net_Appender_EventLogAppender__ctor.htm">EventLogAppender<span id="LST8120C0C5_3"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST8120C0C5_3?cs=()|vb=|cpp=()|nu=()|fs=()");</script></a></td><td><div class="summary">
            Initializes a new instance of the <span class="selflink">EventLogAppender</span> class.
            </div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="M_log4net_Appender_EventLogAppender__ctor_1.htm">EventLogAppender(ILayout)</a></td><td> <strong>Obsolete. </strong><div class="summary">
            Initializes a new instance of the <span class="selflink">EventLogAppender</span> class
            with the specified <a href="T_log4net_Layout_ILayout.htm">ILayout</a>.
            </div></td></tr></table><a href="#mainBody">Top</a><div class="OH_CollapsibleAreaRegion"><div class="OH_regiontitle">Properties</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"> </div><table id="memberList" class="members"><tr><th class="ps_iconColumn">
								 
							</th><th>Name</th><th>Description</th></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" alt="Public property" title="Public property" /></td><td><a href="P_log4net_Appender_EventLogAppender_ApplicationName.htm">ApplicationName</a></td><td><div class="summary">
            Property used to set the Application name.  This appears in the
            event logs when logging.
            </div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" alt="Public property" title="Public property" /></td><td><a href="P_log4net_Appender_EventLogAppender_Category.htm">Category</a></td><td><div class="summary">
            Gets or sets the <span class="code">Category</span> to use unless one is explicitly specified via the <span class="code">LoggingEvent</span>'s properties.
            </div></td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubproperty.gif" alt="Public property" title="Public property" /></td><td><a href="P_log4net_Appender_AppenderSkeleton_ErrorHandler.htm">ErrorHandler</a></td><td><div class="summary">
            Gets or sets the <a href="T_log4net_Core_IErrorHandler.htm">IErrorHandler</a> for this appender.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" alt="Public property" title="Public property" /></td><td><a href="P_log4net_Appender_EventLogAppender_EventId.htm">EventId</a></td><td><div class="summary">
            Gets or sets the <span class="code">EventId</span> to use unless one is explicitly specified via the <span class="code">LoggingEvent</span>'s properties.
            </div></td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubproperty.gif" alt="Public property" title="Public property" /></td><td><a href="P_log4net_Appender_AppenderSkeleton_FilterHead.htm">FilterHead</a></td><td><div class="summary">
            The filter chain.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubproperty.gif" alt="Public property" title="Public property" /></td><td><a href="P_log4net_Appender_AppenderSkeleton_Layout.htm">Layout</a></td><td><div class="summary">
            Gets or sets the <a href="T_log4net_Layout_ILayout.htm">ILayout</a> for this appender.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" alt="Public property" title="Public property" /></td><td><a href="P_log4net_Appender_EventLogAppender_LogName.htm">LogName</a></td><td><div class="summary">
            The name of the log where messages will be stored.
            </div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" alt="Public property" title="Public property" /></td><td><a href="P_log4net_Appender_EventLogAppender_MachineName.htm">MachineName</a></td><td><div class="summary">
            This property is used to return the name of the computer to use
            when accessing the event logs.  Currently, this is the current
            computer, denoted by a dot "."
            </div></td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubproperty.gif" alt="Public property" title="Public property" /></td><td><a href="P_log4net_Appender_AppenderSkeleton_Name.htm">Name</a></td><td><div class="summary">
            Gets or sets the name of this appender.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="protected;declared;notNetfw;"><td><img src="../icons/protproperty.gif" alt="Protected property" title="Protected property" /></td><td><a href="P_log4net_Appender_EventLogAppender_RequiresLayout.htm">RequiresLayout</a></td><td><div class="summary">
            This appender requires a <a href="N_log4net_Layout.htm">log4net.Layout</a> to be set.
            </div> (Overrides <a href="P_log4net_Appender_AppenderSkeleton_RequiresLayout.htm">AppenderSkeleton<span id="LST8120C0C5_4"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST8120C0C5_4?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>RequiresLayout</a>.)</td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubproperty.gif" alt="Public property" title="Public property" /></td><td><a href="P_log4net_Appender_EventLogAppender_SecurityContext.htm">SecurityContext</a></td><td><div class="summary">
            Gets or sets the <a href="P_log4net_Appender_EventLogAppender_SecurityContext.htm">SecurityContext</a> used to write to the EventLog.
            </div></td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubproperty.gif" alt="Public property" title="Public property" /></td><td><a href="P_log4net_Appender_AppenderSkeleton_Threshold.htm">Threshold</a></td><td><div class="summary">
            Gets or sets the threshold <a href="T_log4net_Core_Level.htm">Level</a> of this appender.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr></table><a href="#mainBody">Top</a><div class="OH_CollapsibleAreaRegion"><div class="OH_regiontitle">Methods</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"> </div><table id="memberList" class="members"><tr><th class="ps_iconColumn">
								 
							</th><th>Name</th><th>Description</th></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="M_log4net_Appender_EventLogAppender_ActivateOptions.htm">ActivateOptions</a></td><td><div class="summary">
            Initialize the appender based on the options set
            </div> (Overrides <a href="M_log4net_Appender_AppenderSkeleton_ActivateOptions.htm">AppenderSkeleton<span id="LST8120C0C5_5"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST8120C0C5_5?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>ActivateOptions<span id="LST8120C0C5_6"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST8120C0C5_6?cs=()|vb=|cpp=()|nu=()|fs=()");</script></a>.)</td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="M_log4net_Appender_AppenderSkeleton_AddFilter.htm">AddFilter</a></td><td><div class="summary">
            Adds a filter to the end of the filter chain.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="M_log4net_Appender_EventLogAppender_AddMapping.htm">AddMapping</a></td><td><div class="summary">
            Add a mapping of level to <a href="http://msdn2.microsoft.com/en-us/library/chx09fy8" target="_blank">EventLogEntryType</a> - done by the config file
            </div></td></tr><tr data="protected;inherited;notNetfw;"><td><img src="../icons/protmethod.gif" alt="Protected method" title="Protected method" /></td><td><a href="M_log4net_Appender_AppenderSkeleton_Append_1.htm">Append(<span id="LST8120C0C5_7"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST8120C0C5_7?cpp=array&lt;");</script>LoggingEvent<span id="LST8120C0C5_8"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST8120C0C5_8?cpp=&gt;|cs=[]|vb=()|nu=[]|fs=[]");</script>)</a></td><td><div class="summary">
            Append a bulk array of logging events.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="protected;declared;notNetfw;"><td><img src="../icons/protmethod.gif" alt="Protected method" title="Protected method" /></td><td><a href="M_log4net_Appender_EventLogAppender_Append.htm">Append(LoggingEvent)</a></td><td><div class="summary">
            This method is called by the <span class="nolink">DoAppend(LoggingEvent)</span>
            method. 
            </div> (Overrides <a href="M_log4net_Appender_AppenderSkeleton_Append.htm">AppenderSkeleton<span id="LST8120C0C5_9"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST8120C0C5_9?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>Append(LoggingEvent)</a>.)</td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="M_log4net_Appender_AppenderSkeleton_ClearFilters.htm">ClearFilters</a></td><td><div class="summary">
            Clears the filter list for this appender.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="M_log4net_Appender_AppenderSkeleton_Close.htm">Close</a></td><td><div class="summary">
            Closes the appender and release resources.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="M_log4net_Appender_AppenderSkeleton_DoAppend.htm">DoAppend(LoggingEvent)</a></td><td><div class="summary">
            Performs threshold checks and invokes filters before 
            delegating actual logging to the subclasses specific 
            <span class="nolink">[M:Append(LoggingEvent)]</span> method.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="M_log4net_Appender_AppenderSkeleton_DoAppend_1.htm">DoAppend(<span id="LST8120C0C5_10"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST8120C0C5_10?cpp=array&lt;");</script>LoggingEvent<span id="LST8120C0C5_11"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST8120C0C5_11?cpp=&gt;|cs=[]|vb=()|nu=[]|fs=[]");</script>)</a></td><td><div class="summary">
            Performs threshold checks and invokes filters before 
            delegating actual logging to the subclasses specific 
            <span class="nolink">[M:Append(LoggingEvent[])]</span> method.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="http://msdn2.microsoft.com/en-us/library/bsc2ak47" target="_blank">Equals</a></td><td><div class="summary">
                    Determines whether the specified <a href="http://msdn2.microsoft.com/en-us/library/e5kfa45b" target="_blank">Object</a> is equal to the current <a href="http://msdn2.microsoft.com/en-us/library/e5kfa45b" target="_blank">Object</a>.
                </div> (Inherited from <a href="http://msdn2.microsoft.com/en-us/library/e5kfa45b" target="_blank">Object</a>.)</td></tr><tr data="protected;inherited;notNetfw;"><td><img src="../icons/protmethod.gif" alt="Protected method" title="Protected method" /></td><td><a href="M_log4net_Appender_AppenderSkeleton_FilterEvent.htm">FilterEvent</a></td><td><div class="summary">
            Test if the logging event should we output by this appender
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="protected;inherited;notNetfw;"><td><img src="../icons/protmethod.gif" alt="Protected method" title="Protected method" /></td><td><a href="M_log4net_Appender_AppenderSkeleton_Finalize.htm">Finalize</a></td><td><div class="summary">
            Finalizes this appender by calling the implementation's 
            <a href="M_log4net_Appender_AppenderSkeleton_Close.htm">Close<span id="LST8120C0C5_12"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST8120C0C5_12?cs=()|vb=|cpp=()|nu=()|fs=()");</script></a> method.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="M_log4net_Appender_AppenderSkeleton_Flush.htm">Flush</a></td><td><div class="summary">
            Flushes any buffered log data.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="protected;declared;notNetfw;"><td><img src="../icons/protmethod.gif" alt="Protected method" title="Protected method" /></td><td><a href="M_log4net_Appender_EventLogAppender_GetEntryType.htm">GetEntryType</a></td><td><div class="summary">
            Get the equivalent <a href="http://msdn2.microsoft.com/en-us/library/chx09fy8" target="_blank">EventLogEntryType</a> for a <a href="T_log4net_Core_Level.htm">Level</a><span class="parameter">level</span></div></td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="http://msdn2.microsoft.com/en-us/library/zdee4b3y" target="_blank">GetHashCode</a></td><td><div class="summary">
                    Serves as a hash function for a particular type. 
                </div> (Inherited from <a href="http://msdn2.microsoft.com/en-us/library/e5kfa45b" target="_blank">Object</a>.)</td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="http://msdn2.microsoft.com/en-us/library/dfwy45w9" target="_blank">GetType</a></td><td><div class="summary">
                    Gets the <a href="http://msdn2.microsoft.com/en-us/library/42892f65" target="_blank">Type</a> of the current instance.
                </div> (Inherited from <a href="http://msdn2.microsoft.com/en-us/library/e5kfa45b" target="_blank">Object</a>.)</td></tr><tr data="protected;inherited;notNetfw;"><td><img src="../icons/protmethod.gif" alt="Protected method" title="Protected method" /></td><td><a href="M_log4net_Appender_AppenderSkeleton_IsAsSevereAsThreshold.htm">IsAsSevereAsThreshold</a></td><td><div class="summary">
            Checks if the message level is below this appender's threshold.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="protected;inherited;notNetfw;"><td><img src="../icons/protmethod.gif" alt="Protected method" title="Protected method" /></td><td><a href="http://msdn2.microsoft.com/en-us/library/57ctke0a" target="_blank">MemberwiseClone</a></td><td><div class="summary">
                    Creates a shallow copy of the current <a href="http://msdn2.microsoft.com/en-us/library/e5kfa45b" target="_blank">Object</a>.
                </div> (Inherited from <a href="http://msdn2.microsoft.com/en-us/library/e5kfa45b" target="_blank">Object</a>.)</td></tr><tr data="protected;inherited;notNetfw;"><td><img src="../icons/protmethod.gif" alt="Protected method" title="Protected method" /></td><td><a href="M_log4net_Appender_AppenderSkeleton_OnClose.htm">OnClose</a></td><td><div class="summary">
            Is called when the appender is closed. Derived classes should override 
            this method if resources need to be released.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="protected;inherited;notNetfw;"><td><img src="../icons/protmethod.gif" alt="Protected method" title="Protected method" /></td><td><a href="M_log4net_Appender_AppenderSkeleton_PreAppendCheck.htm">PreAppendCheck</a></td><td><div class="summary">
            Called before <span class="nolink">[M:Append(LoggingEvent)]</span> as a precondition.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="protected;inherited;notNetfw;"><td><img src="../icons/protmethod.gif" alt="Protected method" title="Protected method" /></td><td><a href="M_log4net_Appender_AppenderSkeleton_RenderLoggingEvent.htm">RenderLoggingEvent(LoggingEvent)</a></td><td><div class="summary">
            Renders the <a href="T_log4net_Core_LoggingEvent.htm">LoggingEvent</a> to a string.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="protected;inherited;notNetfw;"><td><img src="../icons/protmethod.gif" alt="Protected method" title="Protected method" /></td><td><a href="M_log4net_Appender_AppenderSkeleton_RenderLoggingEvent_1.htm">RenderLoggingEvent(TextWriter, LoggingEvent)</a></td><td><div class="summary">
            Renders the <a href="T_log4net_Core_LoggingEvent.htm">LoggingEvent</a> to a string.
            </div> (Inherited from <a href="T_log4net_Appender_AppenderSkeleton.htm">AppenderSkeleton</a>.)</td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="http://msdn2.microsoft.com/en-us/library/7bxwbwt2" target="_blank">ToString</a></td><td><div class="summary">
                    Returns a <a href="http://msdn2.microsoft.com/en-us/library/s1wwdcbf" target="_blank">String</a> that represents the current <a href="http://msdn2.microsoft.com/en-us/library/e5kfa45b" target="_blank">Object</a>.
                </div> (Inherited from <a href="http://msdn2.microsoft.com/en-us/library/e5kfa45b" target="_blank">Object</a>.)</td></tr></table><a href="#mainBody">Top</a><div class="OH_CollapsibleAreaRegion"><div class="OH_regiontitle">Remarks</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"> </div><p>
            The appender will fail if you try to write using an event source that doesn't exist unless it is running with local administrator privileges.
            See also http://logging.apache.org/log4net/release/faq.html#trouble-EventLog
            </p><p>
            The <span class="code">EventID</span> of the event log entry can be
            set using the <span class="code">EventID</span> property (<a href="P_log4net_Core_LoggingEvent_Properties.htm">Properties</a>)
            on the <a href="T_log4net_Core_LoggingEvent.htm">LoggingEvent</a>.
            </p><p>
            The <span class="code">Category</span> of the event log entry can be
            set using the <span class="code">Category</span> property (<a href="P_log4net_Core_LoggingEvent_Properties.htm">Properties</a>)
            on the <a href="T_log4net_Core_LoggingEvent.htm">LoggingEvent</a>.
            </p><p>
            There is a limit of 32K characters for an event log message
            </p><p>
            When configuring the EventLogAppender a mapping can be
            specified to map a logging level to an event log entry type. For example:
            </p><div class="OH_CodeSnippetContainer"><div class="OH_CodeSnippetContainerCodeCollection"><div class="OH_CodeSnippetToolBar"><div class="OH_CodeSnippetToolBarText"><a id="ID0EABFBA_copyCode" href="#" onclick="javascript:CopyToClipboard('ID0EABFBA');return false;" title="Copy">Copy</a></div></div><div id="ID0EABFBA_code_Div1" class="OH_CodeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="highlight-xml-bracket">&lt;</span><span class="highlight-xml-tag">mapping</span><span class="highlight-xml-bracket">&gt;</span>
  <span class="highlight-xml-bracket">&lt;</span><span class="highlight-xml-tag">level</span> <span class="highlight-xml-attribute-name">value</span><span class="highlight-xml-attribute-equal">=</span><span class="highlight-xml-attribute-value">"ERROR"</span> <span class="highlight-xml-bracket">/&gt;</span>
  <span class="highlight-xml-bracket">&lt;</span><span class="highlight-xml-tag">eventLogEntryType</span> <span class="highlight-xml-attribute-name">value</span><span class="highlight-xml-attribute-equal">=</span><span class="highlight-xml-attribute-value">"Error"</span> <span class="highlight-xml-bracket">/&gt;</span>
<span class="highlight-xml-bracket">&lt;/</span><span class="highlight-xml-tag">mapping</span><span class="highlight-xml-bracket">&gt;</span>
<span class="highlight-xml-bracket">&lt;</span><span class="highlight-xml-tag">mapping</span><span class="highlight-xml-bracket">&gt;</span>
  <span class="highlight-xml-bracket">&lt;</span><span class="highlight-xml-tag">level</span> <span class="highlight-xml-attribute-name">value</span><span class="highlight-xml-attribute-equal">=</span><span class="highlight-xml-attribute-value">"DEBUG"</span> <span class="highlight-xml-bracket">/&gt;</span>
  <span class="highlight-xml-bracket">&lt;</span><span class="highlight-xml-tag">eventLogEntryType</span> <span class="highlight-xml-attribute-name">value</span><span class="highlight-xml-attribute-equal">=</span><span class="highlight-xml-attribute-value">"Information"</span> <span class="highlight-xml-bracket">/&gt;</span>
<span class="highlight-xml-bracket">&lt;/</span><span class="highlight-xml-tag">mapping</span><span class="highlight-xml-bracket">&gt;</span></pre></div></div></div><script type="text/javascript">AddLanguageTabSet("ID0EABFBA");</script><p>
            The Level is the standard log4net logging level and eventLogEntryType can be any value
            from the <a href="http://msdn2.microsoft.com/en-us/library/chx09fy8" target="_blank">EventLogEntryType</a> enum, i.e.:
            <ul><li><strong>Error</strong> - an error event</li><li><strong>Warning</strong> - a warning event</li><li><strong>Information</strong> - an informational event</li></ul></p><div class="OH_CollapsibleAreaRegion" id="seeAlsoSection"><div class="OH_regiontitle">See Also</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"> </div><h4 class="subHeading">Reference</h4><div class="seeAlsoStyle"><a href="N_log4net_Appender.htm">log4net.Appender Namespace</a></div></div></div></div></div><div id="OH_footer" class="OH_footer">Apache log4net, Apache and log4net are trademarks of The Apache Software Foundation.<p><a href="http://logging.apache.org/log4net/" target="_blank">Copyright 2004-2017 The Apache Software Foundation</a></p><div class="OH_feedbacklink">Send comments on this topic to
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