﻿<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>DynamicPatternLayout Class</title><meta name="Language" content="en-us" /><meta name="System.Keywords" content="DynamicPatternLayout class" /><meta name="System.Keywords" content="log4net.Layout.DynamicPatternLayout class" /><meta name="System.Keywords" content="DynamicPatternLayout class, about DynamicPatternLayout class" /><meta name="Microsoft.Help.F1" content="log4net.Layout.DynamicPatternLayout" /><meta name="Microsoft.Help.Id" content="T:log4net.Layout.DynamicPatternLayout" /><meta name="Description" content="A flexible layout configurable with pattern string that re-evaluates on each call." /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="BrandingAware" content="true" /><meta name="container" content="log4net.Layout" /><meta name="file" content="T_log4net_Layout_DynamicPatternLayout" /><meta name="guid" content="T_log4net_Layout_DynamicPatternLayout" /></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">DynamicPatternLayout 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">
            A flexible layout configurable with pattern string that re-evaluates on each call.
            </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="LSTF4234ED8_0"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTF4234ED8_0?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>Object</a><br />  <a href="T_log4net_Layout_LayoutSkeleton.htm">log4net.Layout<span id="LSTF4234ED8_1"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTF4234ED8_1?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>LayoutSkeleton</a><br />    <a href="T_log4net_Layout_PatternLayout.htm">log4net.Layout<span id="LSTF4234ED8_2"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTF4234ED8_2?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>PatternLayout</a><br />      <span class="selflink">log4net.Layout<span id="LSTF4234ED8_3"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTF4234ED8_3?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>DynamicPatternLayout</span><br /><p> </p><strong>Namespace:</strong> <a href="N_log4net_Layout.htm">log4net.Layout</a><br /><strong>Assembly:</strong> log4net (in log4net.dll) Version: 2.0.8.0-.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">DynamicPatternLayout</span> : <span class="identifier">PatternLayout</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">DynamicPatternLayout</span>
	<span class="keyword">Inherits</span> <span class="identifier">PatternLayout</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">DynamicPatternLayout</span> : <span class="keyword">public</span> <span class="identifier">PatternLayout</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">DynamicPatternLayout</span> =  
    <span class="keyword">class</span>
        <span class="keyword">inherit</span> <span class="identifier">PatternLayout</span>
    <span class="keyword">end</span></pre></div></div></div><script type="text/javascript">AddLanguageTabSet("ID0EDCA");</script><p>The <span class="selflink">DynamicPatternLayout</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_Layout_DynamicPatternLayout__ctor.htm">DynamicPatternLayout<span id="LSTF4234ED8_4"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTF4234ED8_4?cs=()|vb=|cpp=()|nu=()|fs=()");</script></a></td><td><div class="summary">
            Constructs a DynamicPatternLayout using the DefaultConversionPattern
            </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_Layout_DynamicPatternLayout__ctor_1.htm">DynamicPatternLayout(String)</a></td><td><div class="summary">
            Constructs a DynamicPatternLayout using the supplied conversion pattern
            </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_Layout_LayoutSkeleton_ContentType.htm">ContentType</a></td><td><div class="summary">
            The content type output by this layout. 
            </div> (Inherited from <a href="T_log4net_Layout_LayoutSkeleton.htm">LayoutSkeleton</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_Layout_PatternLayout_ConversionPattern.htm">ConversionPattern</a></td><td><div class="summary">
            The pattern formatting string
            </div> (Inherited from <a href="T_log4net_Layout_PatternLayout.htm">PatternLayout</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_Layout_DynamicPatternLayout_Footer.htm">Footer</a></td><td><div class="summary">
            The footer for the layout format.
            </div> (Overrides <a href="P_log4net_Layout_LayoutSkeleton_Footer.htm">LayoutSkeleton<span id="LSTF4234ED8_5"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTF4234ED8_5?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>Footer</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_Layout_DynamicPatternLayout_Header.htm">Header</a></td><td><div class="summary">
            The header for the layout format.
            </div> (Overrides <a href="P_log4net_Layout_LayoutSkeleton_Header.htm">LayoutSkeleton<span id="LSTF4234ED8_6"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTF4234ED8_6?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>Header</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_Layout_LayoutSkeleton_IgnoresException.htm">IgnoresException</a></td><td><div class="summary">
            Flag indicating if this layout handles exceptions
            </div> (Inherited from <a href="T_log4net_Layout_LayoutSkeleton.htm">LayoutSkeleton</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_Layout_PatternLayout_ActivateOptions.htm">ActivateOptions</a></td><td><div class="summary">
            Initialize layout options
            </div> (Inherited from <a href="T_log4net_Layout_PatternLayout.htm">PatternLayout</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_Layout_PatternLayout_AddConverter.htm">AddConverter(ConverterInfo)</a></td><td><div class="summary">
            Add a converter to this PatternLayout
            </div> (Inherited from <a href="T_log4net_Layout_PatternLayout.htm">PatternLayout</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_Layout_PatternLayout_AddConverter_1.htm">AddConverter(String, Type)</a></td><td><div class="summary">
            Add a converter to this PatternLayout
            </div> (Inherited from <a href="T_log4net_Layout_PatternLayout.htm">PatternLayout</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_Layout_PatternLayout_CreatePatternParser.htm">CreatePatternParser</a></td><td><div class="summary">
            Create the pattern parser instance
            </div> (Inherited from <a href="T_log4net_Layout_PatternLayout.htm">PatternLayout</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="M_log4net_Layout_LayoutSkeleton_Format.htm">Format(LoggingEvent)</a></td><td><div class="summary">
            Convenience method for easily formatting the logging event into a string variable.
            </div> (Inherited from <a href="T_log4net_Layout_LayoutSkeleton.htm">LayoutSkeleton</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_Layout_PatternLayout_Format.htm">Format(TextWriter, LoggingEvent)</a></td><td><div class="summary">
            Produces a formatted string as specified by the conversion pattern.
            </div> (Inherited from <a href="T_log4net_Layout_PatternLayout.htm">PatternLayout</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">Remarks</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"> </div><p>This class is built on <a href="T_log4net_Layout_PatternLayout.htm">PatternLayout</a> and provides all the
            features and capabilities of PatternLayout.  PatternLayout is a 'static' class
            in that its layout is done once at configuration time.  This class will recreate
            the layout on each reference.</p><p>One important difference between PatternLayout and DynamicPatternLayout is the
            treatment of the Header and Footer parameters in the configuration.  The Header and Footer
            parameters for DynamicPatternLayout must be syntactically in the form of a PatternString,
            but should not be marked as type log4net.Util.PatternString.  Doing so causes the
            pattern to be statically converted at configuration time and causes DynamicPatternLayout
            to perform the same as PatternLayout.</p><p>Please see <a href="T_log4net_Layout_PatternLayout.htm">PatternLayout</a> for complete documentation.</p><div class="OH_CollapsibleAreaRegion"><div class="OH_regiontitle">Examples</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"> </div>
            &lt;layout type="log4net.Layout.DynamicPatternLayout"&gt;
              &lt;param name="Header" value="%newline**** Trace Opened     Local: %date{yyyy-MM-dd HH:mm:ss.fff}     UTC: %utcdate{yyyy-MM-dd HH:mm:ss.fff} ****%newline" /&gt;
              &lt;param name="Footer" value="**** Trace Closed %date{yyyy-MM-dd HH:mm:ss.fff} ****%newline" /&gt;
            &lt;/layout&gt;
            <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_Layout.htm">log4net.Layout 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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