﻿<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>RollingFileAppender.NextCheckDate Method </title><meta name="Language" content="en-us" /><meta name="System.Keywords" content="NextCheckDate method" /><meta name="System.Keywords" content="RollingFileAppender.NextCheckDate method" /><meta name="Microsoft.Help.F1" content="log4net.Appender.RollingFileAppender.NextCheckDate" /><meta name="Microsoft.Help.Id" content="M:log4net.Appender.RollingFileAppender.NextCheckDate(System.DateTime,log4net.Appender.RollingFileAppender.RollPoint)" /><meta name="Description" content="Get the start time of the next window for the current rollpoint" /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="BrandingAware" content="true" /><meta name="container" content="log4net.Appender" /><meta name="file" content="M_log4net_Appender_RollingFileAppender_NextCheckDate" /><meta name="guid" content="M_log4net_Appender_RollingFileAppender_NextCheckDate" /></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">RollingFileAppender<span id="LST39BFFAA0_0"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST39BFFAA0_0?cpp=::|nu=.");</script>NextCheckDate Method </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">
            Get the start time of the next window for the current rollpoint
            </div><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">protected</span> <span class="identifier">DateTime</span> <span class="identifier">NextCheckDate</span>(
	<span class="identifier">DateTime</span> <span class="parameter">currentDateTime</span>,
	<span class="identifier">RollingFileAppender<span id="LST39BFFAA0_1"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST39BFFAA0_1?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>RollPoint</span> <span class="parameter">rollPoint</span>
)</pre></div><div id="ID0EDCA_code_Div2" class="OH_CodeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">Protected</span> <span class="keyword">Function</span> <span class="identifier">NextCheckDate</span> ( 
	<span class="parameter">currentDateTime</span> <span class="keyword">As</span> <span class="identifier">DateTime</span>,
	<span class="parameter">rollPoint</span> <span class="keyword">As</span> <span class="identifier">RollingFileAppender<span id="LST39BFFAA0_2"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST39BFFAA0_2?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>RollPoint</span>
) <span class="keyword">As</span> <span class="identifier">DateTime</span></pre></div><div id="ID0EDCA_code_Div3" class="OH_CodeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">protected</span>:
<span class="identifier">DateTime</span> <span class="identifier">NextCheckDate</span>(
	<span class="identifier">DateTime</span> <span class="parameter">currentDateTime</span>, 
	<span class="identifier">RollingFileAppender<span id="LST39BFFAA0_3"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST39BFFAA0_3?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>RollPoint</span> <span class="parameter">rollPoint</span>
)</pre></div><div id="ID0EDCA_code_Div4" class="OH_CodeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">member</span> <span class="identifier">NextCheckDate</span> : 
        <span class="parameter">currentDateTime</span> : <span class="identifier">DateTime</span> * 
        <span class="parameter">rollPoint</span> : <span class="identifier">RollingFileAppender<span id="LST39BFFAA0_4"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST39BFFAA0_4?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>RollPoint</span> <span class="keyword">-&gt;</span> <span class="identifier">DateTime</span> 
</pre></div></div></div><script type="text/javascript">AddLanguageTabSet("ID0EDCA");</script><h4 class="subHeading">Parameters</h4><dl><dt><span class="parameter">currentDateTime</span></dt><dd>Type: <a href="http://msdn2.microsoft.com/en-us/library/03ybds8y" target="_blank">System<span id="LST39BFFAA0_5"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST39BFFAA0_5?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>DateTime</a><br />the current date</dd><dt><span class="parameter">rollPoint</span></dt><dd>Type: <a href="T_log4net_Appender_RollingFileAppender_RollPoint.htm">log4net.Appender<span id="LST39BFFAA0_6"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST39BFFAA0_6?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>RollingFileAppender<span id="LST39BFFAA0_7"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST39BFFAA0_7?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>RollPoint</a><br />the type of roll point we are working with</dd></dl><h4 class="subHeading">Return Value</h4>Type: <a href="http://msdn2.microsoft.com/en-us/library/03ybds8y" target="_blank">DateTime</a><br />the start time for the next roll point an interval after the currentDateTime date<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>
            Returns the date of the next roll point after the currentDateTime date passed to the method.
            </p><p>
            The basic strategy is to subtract the time parts that are less significant
            than the rollpoint from the current time. This should roll the time back to
            the start of the time window for the current rollpoint. Then we add 1 window
            worth of time and get the start time of the next window for the rollpoint.
            </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="T_log4net_Appender_RollingFileAppender.htm">RollingFileAppender Class</a></div><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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