docs/csharp/html/M_BerkeleyDB_Cursor_MovePrevDuplicate_1.htm

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   8 </td></tr></table><table id="gradientTable"><tr><td class="nsrBottom" background="../icons/gradient.gif" /></tr></table></div><div id="mainSection"><div id="mainBody"><div id="allHistory" class="saveHistory" onsave="saveAll()" onload="loadAll()" /><span style="color: DarkGray"> </span><div class="summary">\r
   9             If the previous key/data pair of the database is a duplicate data\r
  10             record for the current key/data pair, the cursor is moved to the\r
  11             previous key/data pair of the database, and that pair is stored in\r
  12             <a href="P_BerkeleyDB_Cursor_Current.htm">Current</a>. MovePrevDuplicate will return false if the\r
  13             previous key/data pair of the database is not a duplicate data\r
  14             record for the current key/data pair. If either the key or the\r
  15             data is partial <a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a>, its\r
  16             <a href="P_BerkeleyDB_DatabaseEntry_PartialLen.htm">PartialLen</a> bytes starting\r
  17             <a href="P_BerkeleyDB_DatabaseEntry_PartialOffset.htm">PartialOffset</a> bytes from the beginning\r
  18             of the retrieved data record are returned as if they comprised the\r
  19             entire record. If any or all of the specified bytes do not exist\r
  20             in the record, MovePrevDuplicate is successful, and any existing\r
  21             bytes are returned.\r
  22             </div><p />\r
  23     <b>Namespace:</b> \r
  24    <a href="N_BerkeleyDB.htm">BerkeleyDB</a><br />\r
  25     <b>Assembly:</b>\r
  26    <span sdata="assembly">libdb_dotnet53</span> (in libdb_dotnet53.dll) Version: 5.3.21.0<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>(\r
  27         <a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a> <span class="parameter">key</span>,\r
  28         <a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a> <span class="parameter">data</span>\r
  29 )</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> ( _\r
  30         <span class="parameter">key</span> <span class="keyword">As</span> <a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a>, _\r
  31         <span class="parameter">data</span> <span class="keyword">As</span> <a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a> _\r
  32 ) <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>:\r
  33 <a href="http://msdn2.microsoft.com/en-us/library/a28wyd50" target="_blank">bool</a> <span class="identifier">MovePrevDuplicate</span>(\r
  34         <a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a>^ <span class="parameter">key</span>, \r
  35         <a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a>^ <span class="parameter">data</span>\r
  36 )</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</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 retrieved data</dd></dl></div><h4 class="subHeading">Return Value</h4>\r
  37             True if the cursor was positioned successfully, false otherwise.\r
  38             </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="">\r
  39             If positioning the cursor fails, <a href="P_BerkeleyDB_Cursor_Current.htm">Current</a> will contain\r
  40             an empty <a href="http://msdn2.microsoft.com/en-us/library/5tbh8a42" target="_blank">KeyValuePair<span class="languageSpecificText"><span class="cs">&lt;</span><span class="vb">(Of </span><span class="cpp">&lt;</span><span class="nu">(</span></span>TKey, TValue<span class="languageSpecificText"><span class="cs">&gt;</span><span class="vb">)</span><span class="cpp">&gt;</span><span class="nu">)</span></span></a>.\r
  41             </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_Cursor.htm">Cursor Class</a></div><div class="seeAlsoStyle"><a href="Overload_BerkeleyDB_Cursor_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>\r
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