﻿<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>MdcFilter Class</title><meta name="Language" content="en-us" /><meta name="System.Keywords" content="MdcFilter class" /><meta name="System.Keywords" content="log4net.Filter.MdcFilter class" /><meta name="System.Keywords" content="MdcFilter class, about MdcFilter class" /><meta name="Microsoft.Help.F1" content="log4net.Filter.MdcFilter" /><meta name="Microsoft.Help.Id" content="T:log4net.Filter.MdcFilter" /><meta name="Description" content="Simple filter to match a keyed string in the" /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="BrandingAware" content="true" /><meta name="container" content="log4net.Filter" /><meta name="file" content="T_log4net_Filter_MdcFilter" /><meta name="guid" content="T_log4net_Filter_MdcFilter" /></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">MdcFilter 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">
            Simple filter to match a keyed string in the <a href="T_log4net_MDC.htm">MDC</a></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="LST7282140F_0"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST7282140F_0?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>Object</a><br />  <a href="T_log4net_Filter_FilterSkeleton.htm">log4net.Filter<span id="LST7282140F_1"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST7282140F_1?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>FilterSkeleton</a><br />    <a href="T_log4net_Filter_StringMatchFilter.htm">log4net.Filter<span id="LST7282140F_2"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST7282140F_2?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>StringMatchFilter</a><br />      <a href="T_log4net_Filter_PropertyFilter.htm">log4net.Filter<span id="LST7282140F_3"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST7282140F_3?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>PropertyFilter</a><br />        <span class="selflink">log4net.Filter<span id="LST7282140F_4"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST7282140F_4?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>MdcFilter</span><br /><p> </p><strong>Namespace:</strong> <a href="N_log4net_Filter.htm">log4net.Filter</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">MdcFilter</span> : <span class="identifier">PropertyFilter</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">MdcFilter</span>
	<span class="keyword">Inherits</span> <span class="identifier">PropertyFilter</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">MdcFilter</span> : <span class="keyword">public</span> <span class="identifier">PropertyFilter</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">MdcFilter</span> =  
    <span class="keyword">class</span>
        <span class="keyword">inherit</span> <span class="identifier">PropertyFilter</span>
    <span class="keyword">end</span></pre></div></div></div><script type="text/javascript">AddLanguageTabSet("ID0EDCA");</script><p>The <span class="selflink">MdcFilter</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_Filter_MdcFilter__ctor.htm">MdcFilter</a></td><td><div class="summary">Initializes a new instance of the <span class="selflink">MdcFilter</span> class</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;inherited;notNetfw;"><td><img src="../icons/pubproperty.gif" alt="Public property" title="Public property" /></td><td><a href="P_log4net_Filter_StringMatchFilter_AcceptOnMatch.htm">AcceptOnMatch</a></td><td><div class="summary"><a href="T_log4net_Filter_FilterDecision.htm">Accept</a> when matching <a href="P_log4net_Filter_StringMatchFilter_StringToMatch.htm">StringToMatch</a> or <a href="P_log4net_Filter_StringMatchFilter_RegexToMatch.htm">RegexToMatch</a></div> (Inherited from <a href="T_log4net_Filter_StringMatchFilter.htm">StringMatchFilter</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_Filter_PropertyFilter_Key.htm">Key</a></td><td><div class="summary">
            The key to lookup in the event properties and then match against.
            </div> (Inherited from <a href="T_log4net_Filter_PropertyFilter.htm">PropertyFilter</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_Filter_FilterSkeleton_Next.htm">Next</a></td><td><div class="summary">
            Property to get and set the next filter
            </div> (Inherited from <a href="T_log4net_Filter_FilterSkeleton.htm">FilterSkeleton</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_Filter_StringMatchFilter_RegexToMatch.htm">RegexToMatch</a></td><td><div class="summary">
            Sets the regular expression to match
            </div> (Inherited from <a href="T_log4net_Filter_StringMatchFilter.htm">StringMatchFilter</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_Filter_StringMatchFilter_StringToMatch.htm">StringToMatch</a></td><td><div class="summary">
            Sets the static string to match
            </div> (Inherited from <a href="T_log4net_Filter_StringMatchFilter.htm">StringMatchFilter</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;inherited;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="M_log4net_Filter_StringMatchFilter_ActivateOptions.htm">ActivateOptions</a></td><td><div class="summary">
            Initialize and precompile the Regex if required
            </div> (Inherited from <a href="T_log4net_Filter_StringMatchFilter.htm">StringMatchFilter</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_Filter_PropertyFilter_Decide.htm">Decide</a></td><td><div class="summary">
            Check if this filter should allow the event to be logged
            </div> (Inherited from <a href="T_log4net_Filter_PropertyFilter.htm">PropertyFilter</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="http://msdn2.microsoft.com/en-us/library/4k87zsw7" target="_blank">Finalize</a></td><td><div class="summary">
                    Allows an <a href="http://msdn2.microsoft.com/en-us/library/e5kfa45b" target="_blank">Object</a> to attempt to free resources and perform other cleanup operations before the <a href="http://msdn2.microsoft.com/en-us/library/e5kfa45b" target="_blank">Object</a> is reclaimed by garbage collection.
                </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/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="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="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">Fields</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="protected;inherited;notNetfw;"><td><img src="../icons/protfield.gif" alt="Protected field" title="Protected field" /></td><td><a href="F_log4net_Filter_StringMatchFilter_m_acceptOnMatch.htm">m_acceptOnMatch</a></td><td><div class="summary">
            Flag to indicate the behavior when we have a match
            </div> (Inherited from <a href="T_log4net_Filter_StringMatchFilter.htm">StringMatchFilter</a>.)</td></tr><tr data="protected;inherited;notNetfw;"><td><img src="../icons/protfield.gif" alt="Protected field" title="Protected field" /></td><td><a href="F_log4net_Filter_StringMatchFilter_m_regexToMatch.htm">m_regexToMatch</a></td><td><div class="summary">
            A regex object to match (generated from m_stringRegexToMatch)
            </div> (Inherited from <a href="T_log4net_Filter_StringMatchFilter.htm">StringMatchFilter</a>.)</td></tr><tr data="protected;inherited;notNetfw;"><td><img src="../icons/protfield.gif" alt="Protected field" title="Protected field" /></td><td><a href="F_log4net_Filter_StringMatchFilter_m_stringRegexToMatch.htm">m_stringRegexToMatch</a></td><td><div class="summary">
            A string regex to match
            </div> (Inherited from <a href="T_log4net_Filter_StringMatchFilter.htm">StringMatchFilter</a>.)</td></tr><tr data="protected;inherited;notNetfw;"><td><img src="../icons/protfield.gif" alt="Protected field" title="Protected field" /></td><td><a href="F_log4net_Filter_StringMatchFilter_m_stringToMatch.htm">m_stringToMatch</a></td><td><div class="summary">
            The string to substring match against the message
            </div> (Inherited from <a href="T_log4net_Filter_StringMatchFilter.htm">StringMatchFilter</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>
            Simple filter to match a keyed string in the <a href="T_log4net_MDC.htm">MDC</a></p><p>
            As the MDC has been replaced with layered properties the
            <a href="T_log4net_Filter_PropertyFilter.htm">PropertyFilter</a> should be used instead.
            </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_Filter.htm">log4net.Filter 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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