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<html xmlns:MSHelp="http://msdn.microsoft.com/mshelp" xmlns:mshelp="http://msdn.microsoft.com/mshelp" xmlns:ddue="http://ddue.schemas.microsoft.com/authoring/2003/5" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:msxsl="urn:schemas-microsoft-com:xslt"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8" /><META NAME="save" CONTENT="history" /><title>MovePrevDuplicate Method (DatabaseEntry, DatabaseEntry, DatabaseEntry)</title><link rel="stylesheet" type="text/css" href="../styles/presentation.css" /><link rel="stylesheet" type="text/css" href="ms-help://Hx/HxRuntime/HxLink.css" /><script type="text/javascript" src="../scripts/EventUtilities.js"> </script><script type="text/javascript" src="../scripts/SplitScreen.js"> </script><script type="text/javascript" src="../scripts/Dropdown.js"> </script><script type="text/javascript" src="../scripts/script_manifold.js"> </script><script type="text/javascript" src="../scripts/script_feedBack.js"> </script><script type="text/javascript" src="../scripts/CheckboxMenu.js"> </script><script type="text/javascript" src="../scripts/CommonUtilities.js"> </script><meta name="container" content="BerkeleyDB" /><meta name="file" content="M_BerkeleyDB_SecondaryCursor_MovePrevDuplicate_1" /><meta name="guid" content="M_BerkeleyDB_SecondaryCursor_MovePrevDuplicate_1" /><xml><MSHelp:Attr Name="AssetID" Value="M:BerkeleyDB.SecondaryCursor.MovePrevDuplicate(BerkeleyDB.DatabaseEntry,BerkeleyDB.DatabaseEntry,BerkeleyDB.DatabaseEntry)" /><MSHelp:TOCTitle Title="MovePrevDuplicate Method (DatabaseEntry, DatabaseEntry, DatabaseEntry)" /><MSHelp:RLTitle Title="SecondaryCursor.MovePrevDuplicate Method (DatabaseEntry, DatabaseEntry, DatabaseEntry) (BerkeleyDB)" /><MSHelp:Keyword Index="A" Term="M:BerkeleyDB.SecondaryCursor.MovePrevDuplicate(BerkeleyDB.DatabaseEntry,BerkeleyDB.DatabaseEntry,BerkeleyDB.DatabaseEntry)" /><MSHelp:Attr Name="APIType" Value="Managed" /><MSHelp:Attr Name="APILocation" Value="libdb_dotnet53.dll" /><MSHelp:Attr Name="APIName" Value="BerkeleyDB.SecondaryCursor.MovePrevDuplicate" /><MSHelp:Attr Name="DevLang" Value="CSharp" /><MSHelp:Attr Name="DevLang" Value="VB" /><MSHelp:Attr Name="DevLang" Value="C++" /><MSHelp:Attr Name="Locale" Value="en-us" /><MSHelp:Attr Name="TopicType" Value="kbSyntax" /><MSHelp:Attr Name="TopicType" Value="apiref" /><MSHelp:Attr Name="Abstract" Value="If the previous key/data pair of the database is a duplicate data record for the current key/data pair, the cursor is moved to the previous key/data pair of the database, and the secondary key and ..." /><MSHelp:Attr Name="AssemblyVersion" Value="5.3.28.0" /></xml></head><body><input type="hidden" id="userDataCache" class="userDataStyle" /><input type="hidden" id="hiddenScrollOffset" /><img id="collapseImage" style="display:none; 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If the previous key/data pair of the database is a duplicate data
record for the current key/data pair, the cursor is moved to the
previous key/data pair of the database, and the secondary key and
primary key/data pair in <a href="P_BerkeleyDB_SecondaryCursor_Current.htm">Current</a>. MovePrevDuplicate
will return false if the previous key/data pair of the database is
not a duplicate data record for the current key/data pair. If
<span class="parameter">key</span>, or <span class="parameter">pkey</span>, or
<span class="parameter">data</span> is partial <a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a>, its
<a href="P_BerkeleyDB_DatabaseEntry_PartialLen.htm">PartialLen</a> bytes starting
<a href="P_BerkeleyDB_DatabaseEntry_PartialOffset.htm">PartialOffset</a> bytes from the beginning
of the retrieved data record are returned as if they comprised the
entire record. If any or all of the specified bytes do not exist
in the record, MovePrevDuplicate is successful, and any existing
bytes are returned.
</div><p />
<b>Namespace:</b>
<a href="N_BerkeleyDB.htm">BerkeleyDB</a><br />
<b>Assembly:</b>
<span sdata="assembly">libdb_dotnet53</span> (in libdb_dotnet53.dll) Version: 5.3.28.0<h1 class="heading"><span onclick="ExpandCollapse(syntaxToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(syntaxToggle, event)" tabindex="0"><img id="syntaxToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />Syntax</span></h1><div id="syntaxSection" class="section" name="collapseableSection" style=""><div id="syntaxCodeBlocks" class="code"><span codeLanguage="CSharp"><table><tr><th>C#</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">public</span> <a href="http://msdn2.microsoft.com/en-us/library/a28wyd50" target="_blank">bool</a> <span class="identifier">MovePrevDuplicate</span>(
<a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a> <span class="parameter">key</span>,
<a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a> <span class="parameter">pkey</span>,
<a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a> <span class="parameter">data</span>
)</pre></td></tr></table></span><span codeLanguage="VisualBasicDeclaration"><table><tr><th>Visual Basic (Declaration)</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Function</span> <span class="identifier">MovePrevDuplicate</span> ( _
<span class="parameter">key</span> <span class="keyword">As</span> <a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a>, _
<span class="parameter">pkey</span> <span class="keyword">As</span> <a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a>, _
<span class="parameter">data</span> <span class="keyword">As</span> <a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a> _
) <span class="keyword">As</span> <a href="http://msdn2.microsoft.com/en-us/library/a28wyd50" target="_blank">Boolean</a></pre></td></tr></table></span><span codeLanguage="ManagedCPlusPlus"><table><tr><th>Visual C++</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">public</span>:
<a href="http://msdn2.microsoft.com/en-us/library/a28wyd50" target="_blank">bool</a> <span class="identifier">MovePrevDuplicate</span>(
<a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a>^ <span class="parameter">key</span>,
<a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a>^ <span class="parameter">pkey</span>,
<a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a>^ <span class="parameter">data</span>
)</pre></td></tr></table></span></div><div id="parameters"><h4 class="subHeading">Parameters</h4><dl paramName="key"><dt><span class="parameter">key</span></dt><dd>Type: <a href="T_BerkeleyDB_DatabaseEntry.htm">BerkeleyDB<span class="languageSpecificText"><span class="cs">.</span><span class="vb">.</span><span class="cpp">::</span><span class="nu">.</span></span>DatabaseEntry</a><br />The retrieved key in secondary db</dd></dl><dl paramName="pkey"><dt><span class="parameter">pkey</span></dt><dd>Type: <a href="T_BerkeleyDB_DatabaseEntry.htm">BerkeleyDB<span class="languageSpecificText"><span class="cs">.</span><span class="vb">.</span><span class="cpp">::</span><span class="nu">.</span></span>DatabaseEntry</a><br />
The key of the matching record in primary db
</dd></dl><dl paramName="data"><dt><span class="parameter">data</span></dt><dd>Type: <a href="T_BerkeleyDB_DatabaseEntry.htm">BerkeleyDB<span class="languageSpecificText"><span class="cs">.</span><span class="vb">.</span><span class="cpp">::</span><span class="nu">.</span></span>DatabaseEntry</a><br />
The data of the matching record in primary db
</dd></dl></div><h4 class="subHeading">Return Value</h4>
True if the cursor was positioned successfully, false otherwise.
</div><h1 class="heading"><span onclick="ExpandCollapse(remarksToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(remarksToggle, event)" tabindex="0"><img id="remarksToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />Remarks</span></h1><div id="remarksSection" class="section" name="collapseableSection" style="">
If positioning the cursor fails, <a href="P_BerkeleyDB_SecondaryCursor_Current.htm">Current</a> will contain
an empty <a href="http://msdn2.microsoft.com/en-us/library/5tbh8a42" target="_blank">KeyValuePair<span class="languageSpecificText"><span class="cs"><</span><span class="vb">(Of </span><span class="cpp"><</span><span class="nu">(</span></span>TKey, TValue<span class="languageSpecificText"><span class="cs">></span><span class="vb">)</span><span class="cpp">></span><span class="nu">)</span></span></a>.
</div><h1 class="heading"><span onclick="ExpandCollapse(seeAlsoToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(seeAlsoToggle, event)" tabindex="0"><img id="seeAlsoToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />See Also</span></h1><div id="seeAlsoSection" class="section" name="collapseableSection" style=""><div class="seeAlsoStyle"><a href="T_BerkeleyDB_SecondaryCursor.htm">SecondaryCursor Class</a></div><div class="seeAlsoStyle"><a href="Overload_BerkeleyDB_SecondaryCursor_MovePrevDuplicate.htm">MovePrevDuplicate Overload</a></div><div class="seeAlsoStyle"><a href="N_BerkeleyDB.htm">BerkeleyDB Namespace</a></div></div></div><div id="footer"><div class="footerLine"><img width="100%" height="3px" src="../icons/footer.gif" title="Footer image" /></div><A NAME="feedback"></A><span id="fb" class="feedbackcss"> </span>
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