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Yasuhiro KIMURA 923a4cd4e6 Update to 18.1.32
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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>Delete Method (DatabaseEntry, Transaction)</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_BaseDatabase_Delete_1" /><meta name="guid" content="M_BerkeleyDB_BaseDatabase_Delete_1" /><xml><MSHelp:Attr Name="AssetID" Value="M:BerkeleyDB.BaseDatabase.Delete(BerkeleyDB.DatabaseEntry,BerkeleyDB.Transaction)" /><MSHelp:TOCTitle Title="Delete Method (DatabaseEntry, Transaction)" /><MSHelp:RLTitle Title="BaseDatabase.Delete Method (DatabaseEntry, Transaction) (BerkeleyDB)" /><MSHelp:Keyword Index="A" Term="M:BerkeleyDB.BaseDatabase.Delete(BerkeleyDB.DatabaseEntry,BerkeleyDB.Transaction)" /><MSHelp:Attr Name="APIType" Value="Managed" /><MSHelp:Attr Name="APILocation" Value="libdb_dotnet181.dll" /><MSHelp:Attr Name="APIName" Value="BerkeleyDB.BaseDatabase.Delete" /><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="Remove key/data pairs from the database. If is DatabaseEntry, the key/data pair associated with is discarded from the database. In the presence of duplicate key values, all records associated wi ..." /><MSHelp:Attr Name="AssemblyVersion" Value="18.1.32.0" /></xml></head><body><input type="hidden" id="userDataCache" class="userDataStyle" /><input type="hidden" id="hiddenScrollOffset" /><img id="collapseImage" style="display:none; height:0; width:0;" src="../icons/collapse_all.gif" title="Collapse image" /><img id="expandImage" style="display:none; height:0; width:0;" src="../icons/expand_all.gif" title="Expand Image" /><img id="collapseAllImage" style="display:none; height:0; width:0;" src="../icons/collapse_all.gif" /><img id="expandAllImage" style="display:none; height:0; width:0;" src="../icons/expand_all.gif" /><img id="dropDownImage" style="display:none; height:0; width:0;" src="../icons/dropdown.gif" /><img id="dropDownHoverImage" style="display:none; height:0; width:0;" src="../icons/dropdownHover.gif" /><img id="copyImage" style="display:none; height:0; width:0;" src="../icons/copycode.gif" title="Copy image" /><img id="copyHoverImage" style="display:none; height:0; width:0;" src="../icons/copycodeHighlight.gif" title="CopyHover image" /><div id="header"><table id="topTable" cellspacing="0" cellpadding="0"><tr><td><span onclick="ExpandCollapseAll(toggleAllImage)" style="cursor:default;" onkeypress="ExpandCollapseAll_CheckKey(toggleAllImage, event)" tabindex="0"><img ID="toggleAllImage" class="toggleAll" src="../icons/collapse_all.gif" /> <label id="collapseAllLabel" for="toggleAllImage" style="display: none;">Collapse All</label><label id="expandAllLabel" for="toggleAllImage" style="display: none;">Expand All</label> </span><span>    </span><span id="devlangsDropdown" class="filter" tabindex="0"><img id="devlangsDropdownImage" src="../icons/dropdown.gif" /> <label id="devlangsMenuAllLabel" for="devlangsDropdownImage" style="display: none;"><nobr>Code: All </nobr></label><label id="devlangsMenuMultipleLabel" for="devlangsDropdownImage" style="display: none;"><nobr>Code: Multiple </nobr></label><label id="devlangsMenuCSharpLabel" for="devlangsDropdownImage" style="display: none;"><nobr>Code: C# </nobr></label><label id="devlangsMenuVisualBasicLabel" for="devlangsDropdownImage" style="display: none;"><nobr>Code: Visual Basic </nobr></label><label id="devlangsMenuManagedCPlusPlusLabel" for="devlangsDropdownImage" style="display: none;"><nobr>Code: Visual C++ </nobr></label></span></td></tr></table><div id="devlangsMenu"><input id="CSharpCheckbox" type="checkbox" data="CSharp,cs,'persist'" value="on" onClick="SetLanguage(this)" /><label class="checkboxLabel" for="CSharpCheckbox">C#</label><br /><input id="VisualBasicCheckbox" type="checkbox" data="VisualBasic,vb,'persist'" value="on" onClick="SetLanguage(this)" /><label class="checkboxLabel" for="VisualBasicCheckbox">Visual Basic</label><br /><input id="ManagedCPlusPlusCheckbox" type="checkbox" data="ManagedCPlusPlus,cpp,'persist'" value="on" onClick="SetLanguage(this)" /><label class="checkboxLabel" for="ManagedCPlusPlusCheckbox">Visual C++</label><br /></div><table id="bottomTable" cellpadding="0" cellspacing="0"><tr id="headerTableRow1"><td align="left"><span id="runningHeaderText">Berkeley DB .NET API Documentation</span></td></tr><tr id="headerTableRow2"><td align="left"><span id="nsrTitle">BaseDatabase<span class="languageSpecificText"><span class="cs">.</span><span class="vb">.</span><span class="cpp">::</span><span class="nu">.</span></span>Delete Method (DatabaseEntry, Transaction)</span></td></tr><tr id="headerTableRow3"><td align="left"><a href="T_BerkeleyDB_BaseDatabase.htm">BaseDatabase Class</a>  <a href="#seeAlsoToggle" onclick="OpenSection(seeAlsoToggle)">See Also</a> 
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</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">
Remove key/data pairs from the database. If <span class="parameter">key</span>
is DatabaseEntry, the key/data pair associated with
<span class="parameter">key</span> is discarded from the database. In the
presence of duplicate key values, all records associated with the
designated key are discarded. If <span class="parameter">key</span> is
MultipleDatabaseEntry, delete multiple data items using keys from
the buffer to which the key parameter refers. If
<span class="parameter">key</span> is MultipleKeyDatabaseEntry, delete multiple
data items using keys and data from the buffer to which the key
parameter refers.
</div><p />
<b>Namespace:</b>
 <a href="N_BerkeleyDB.htm">BerkeleyDB</a><br />
<b>Assembly:</b>
 <span sdata="assembly">libdb_dotnet181</span> (in libdb_dotnet181.dll) Version: 18.1.32.0<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> <span class="keyword">void</span> <span class="identifier">Delete</span>(
<a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a> <span class="parameter">key</span>,
<a href="T_BerkeleyDB_Transaction.htm">Transaction</a> <span class="parameter">txn</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">Sub</span> <span class="identifier">Delete</span> ( _
<span class="parameter">key</span> <span class="keyword">As</span> <a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a>, _
<span class="parameter">txn</span> <span class="keyword">As</span> <a href="T_BerkeleyDB_Transaction.htm">Transaction</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>:
<span class="keyword">void</span> <span class="identifier">Delete</span>(
<a href="T_BerkeleyDB_DatabaseEntry.htm">DatabaseEntry</a>^ <span class="parameter">key</span>,
<a href="T_BerkeleyDB_Transaction.htm">Transaction</a>^ <span class="parameter">txn</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 />
Discard the key/data pairs associated with <span class="parameter">key</span>.
</dd></dl><dl paramName="txn"><dt><span class="parameter">txn</span></dt><dd>Type: <a href="T_BerkeleyDB_Transaction.htm">BerkeleyDB<span class="languageSpecificText"><span class="cs">.</span><span class="vb">.</span><span class="cpp">::</span><span class="nu">.</span></span>Transaction</a><br />
If the operation is part of an application-specified transaction,
<span class="parameter">txn</span> is a Transaction object returned from
<a href="M_BerkeleyDB_DatabaseEnvironment_BeginTransaction.htm">BeginTransaction<span class="languageSpecificText"><span class="cs">()</span><span class="cpp">()</span><span class="nu">()</span></span></a>; if
the operation is part of a Berkeley DB Concurrent Data Store group,
<span class="parameter">txn</span> is a handle returned from
<a href="M_BerkeleyDB_DatabaseEnvironment_BeginCDSGroup.htm">BeginCDSGroup<span class="languageSpecificText"><span class="cs">()</span><span class="cpp">()</span><span class="nu">()</span></span></a>; otherwise null.
</dd></dl></div></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="">
<p>
When called on a secondary database, remove the key/data pairs from
the primary database and all secondary indices.
</p>
<p>
If <span class="parameter">txn</span> is null and the operation occurs in a
transactional database, the operation is implicitly transaction
protected.
</p>
</div><h1 class="heading"><span onclick="ExpandCollapse(exceptionsToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(exceptionsToggle, event)" tabindex="0"><img id="exceptionsToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />Exceptions</span></h1><div id="exceptionsSection" class="section" name="collapseableSection" style=""><div class="tableSection"><table width="100%" cellspacing="2" cellpadding="5" frame="lhs"><tr><th class="exceptionNameColumn">Exception</th><th class="exceptionConditionColumn">Condition</th></tr><tr><td><a href="T_BerkeleyDB_NotFoundException.htm">BerkeleyDB<span class="languageSpecificText"><span class="cs">.</span><span class="vb">.</span><span class="cpp">::</span><span class="nu">.</span></span>NotFoundException</a></td><td>
A NotFoundException is thrown if <span class="parameter">key</span> is not in
the database.
</td></tr><tr><td><a href="T_BerkeleyDB_KeyEmptyException.htm">BerkeleyDB<span class="languageSpecificText"><span class="cs">.</span><span class="vb">.</span><span class="cpp">::</span><span class="nu">.</span></span>KeyEmptyException</a></td><td>
A KeyEmptyException is thrown if the database is a
<a href="T_BerkeleyDB_QueueDatabase.htm">QueueDatabase</a> or <a href="T_BerkeleyDB_RecnoDatabase.htm">RecnoDatabase</a>
database and <span class="parameter">key</span> exists, but was never explicitly
created by the application or was later deleted.
</td></tr></table></div></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_BaseDatabase.htm">BaseDatabase Class</a></div><div class="seeAlsoStyle"><a href="Overload_BerkeleyDB_BaseDatabase_Delete.htm">Delete 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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