| <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>MDC Class</title><meta name="Language" content="en-us" /><meta name="System.Keywords" content="MDC class" /><meta name="System.Keywords" content="log4net.MDC class" /><meta name="System.Keywords" content="MDC class, about MDC class" /><meta name="Microsoft.Help.F1" content="log4net.MDC" /><meta name="Microsoft.Help.Id" content="T:log4net.MDC" /><meta name="Description" content="Implementation of Mapped Diagnostic Contexts." /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="BrandingAware" content="true" /><meta name="container" content="log4net" /><meta name="file" content="T_log4net_MDC" /><meta name="guid" content="T_log4net_MDC" /></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">MDC 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"> |
| Implementation of Mapped Diagnostic Contexts. |
| </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="LSTAA7CDB05_0"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTAA7CDB05_0?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>Object</a><br /> <span class="selflink">log4net<span id="LSTAA7CDB05_1"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTAA7CDB05_1?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>MDC</span><br /><p> </p><strong>Namespace:</strong> <a href="N_log4net.htm">log4net</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">sealed</span> <span class="keyword">class</span> <span class="identifier">MDC</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">NotInheritable</span> <span class="keyword">Class</span> <span class="identifier">MDC</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">MDC</span> <span class="keyword">sealed</span></pre></div><div id="ID0EDCA_code_Div4" class="OH_CodeSnippetContainerCode" style="display: none"><pre xml:space="preserve">[<<span class="identifier">SealedAttribute</span>>] |
| <span class="keyword">type</span> <span class="identifier">MDC</span> = <span class="keyword">class</span> <span class="keyword">end</span></pre></div></div></div><script type="text/javascript">AddLanguageTabSet("ID0EDCA");</script><p>The <span class="selflink">MDC</span> type exposes the following members.</p><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;static;declared;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /><img src="../icons/static.gif" alt="Static member" title="Static member" /></td><td><a href="M_log4net_MDC_Clear.htm">Clear</a></td><td><div class="summary"> |
| Clear all entries in the MDC |
| </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/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="public;static;declared;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /><img src="../icons/static.gif" alt="Static member" title="Static member" /></td><td><a href="M_log4net_MDC_Get.htm">Get</a></td><td><div class="summary"> |
| Gets the context value identified by the <span class="parameter">key</span> parameter. |
| </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="public;static;declared;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /><img src="../icons/static.gif" alt="Static member" title="Static member" /></td><td><a href="M_log4net_MDC_Remove.htm">Remove</a></td><td><div class="summary"> |
| Removes the key value mapping for the key specified. |
| </div></td></tr><tr data="public;static;declared;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /><img src="../icons/static.gif" alt="Static member" title="Static member" /></td><td><a href="M_log4net_MDC_Set.htm">Set</a></td><td><div class="summary"> |
| Add an entry to the MDC |
| </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/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><div class="alert"><table><tr><th><img src="../icons/alert_note.gif" alt="Note" /> Note</th></tr><tr><td><p> |
| The MDC is deprecated and has been replaced by the <a href="P_log4net_ThreadContext_Properties.htm">Properties</a>. |
| The current MDC implementation forwards to the <span class="code">ThreadContext.Properties</span>. |
| </p></td></tr></table></div><p> |
| The MDC class is similar to the <a href="T_log4net_NDC.htm">NDC</a> class except that it is |
| based on a map instead of a stack. It provides <i>mapped |
| diagnostic contexts</i>. A <i>Mapped Diagnostic Context</i>, or |
| MDC in short, is an instrument for distinguishing interleaved log |
| output from different sources. Log output is typically interleaved |
| when a server handles multiple clients near-simultaneously. |
| </p><p> |
| The MDC is managed on a per thread basis. |
| </p><div class="OH_CollapsibleAreaRegion"><div class="OH_regiontitle">Thread Safety</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"> </div>Static members of this type are safe for multi-threaded operations. Instance members of this type are safe for multi-threaded operations. <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.htm">log4net 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 2004-2016 The Apache Software Foundation</a></p><div class="OH_feedbacklink">Send comments on this topic to |
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