﻿<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>PrefixFilter Methods</title><meta name="Language" content="en-us" /><meta name="System.Keywords" content="PrefixFilter class, methods" /><meta name="Microsoft.Help.Id" content="Methods.T:Lucene.Net.Search.PrefixFilter" /><meta name="Microsoft.Help.ContentType" content="Reference" /><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" 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Filtered </nobr></label><label id="memberOptionsMenuProtectedLabel" for="memberOptionsDropdownImage" style="display: none;"><nobr>Members: Filtered </nobr></label><label id="memberOptionsMenuInheritedLabel" for="memberOptionsDropdownImage" style="display: none;"><nobr>Members: Filtered </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><div id="memberOptionsMenu"><input id="ProtectedCheckbox" type="checkbox" data="Protected" value="on" onClick="SetMemberOptions(this, 'vis')" /><label class="checkboxLabel" for="ProtectedCheckbox">Include Protected Members</label><br /><input id="InheritedCheckbox" type="checkbox" data="Inherited" value="on" onClick="SetMemberOptions(this, 'decl')" /><label class="checkboxLabel" for="InheritedCheckbox">Include Inherited Members</label><br /></div><table id="bottomTable" cellpadding="0" cellspacing="0"><tr id="headerTableRow1"><td align="left"><span id="runningHeaderText">Lucene.Net Class Libraries</span></td></tr><tr id="headerTableRow2"><td align="left"><span id="nsrTitle">PrefixFilter Methods</span></td></tr><tr id="headerTableRow3"><td align="left"><a href="74826dc1-4096-50d3-f6ed-8c0131a4ae21.htm">PrefixFilter Class</a> <a href="#seeAlsoToggle" onclick="OpenSection(seeAlsoToggle)">See Also</a> <span id="headfeedbackarea" class="feedbackhead"><a href="javascript:SubmitFeedback('','Lucene.Net Class Libraries','','','','%0\dYour%20feedback%20is%20used%20to%20improve%20the%20documentation%20and%20the%20product.%20Your%20e-mail%20address%20will%20not%20be%20used%20for%20any%20other%20purpose%20and%20is%20disposed%20of%20after%20the%20issue%20you%20report%20is%20resolved.%20%20While%20working%20to%20resolve%20the%20issue%20that%20you%20report,%20you%20may%20be%20contacted%20via%20e-mail%20to%20get%20further%20details%20or%20clarification%20on%20the%20feedback%20you%20sent.%20After%20the%20issue%20you%20report%20has%20been%20addressed,%20you%20may%20receive%20an%20e-mail%20to%20let%20you%20know%20that%20your%20feedback%20has%20been%20addressed.%0\A%0\d','Customer%20Feedback');">Send Feedback</a></span></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><p>The <a href="74826dc1-4096-50d3-f6ed-8c0131a4ae21.htm">PrefixFilter</a> type exposes the following members.</p><h1 class="heading"><span onclick="ExpandCollapse(methodTableToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(methodTableToggle, event)" tabindex="0"><img id="methodTableToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />Methods</span></h1><div id="methodTableSection" class="section" name="collapseableSection" style=""><table id="memberList" class="members" frame="lhs" cellpadding="2"><col width="10%" /><tr><th class="iconColumn">
               
            </th><th class="nameColumn">Name</th><th class="descriptionColumn">Description</th></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="4ce3e370-c2cd-ba37-f7b6-5abb0765b7bc.htm">Bits</a></td><td> <font color="red"><b>Obsolete. </b></font><div class="summary"> Returns a BitSet with true for documents which should be
            permitted in search results, and false for those that should
            not.
            </div> (Inherited from <a href="dc4df7f6-3cca-fe41-8115-9b4804ee8313.htm">MultiTermQueryWrapperFilter</a>.)</td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="477c891b-f242-f4aa-29f6-468f8c40e732.htm">ClearTotalNumberOfTerms</a></td><td><div class="summary"> Expert: Resets the counting of unique terms.
            Do this before executing the filter.
            </div> (Inherited from <a href="dc4df7f6-3cca-fe41-8115-9b4804ee8313.htm">MultiTermQueryWrapperFilter</a>.)</td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="9069b95a-0119-a231-2a9f-3f8b903f40a7.htm">Equals</a></td><td> (Inherited from <a href="dc4df7f6-3cca-fe41-8115-9b4804ee8313.htm">MultiTermQueryWrapperFilter</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="f41643e7-0aa8-0dbb-f04a-ef60abf00ed6.htm">GetDocIdSet</a></td><td><div class="summary"> Returns a DocIdSet with documents that should be
            permitted in search results.
            </div> (Inherited from <a href="dc4df7f6-3cca-fe41-8115-9b4804ee8313.htm">MultiTermQueryWrapperFilter</a>.)</td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="18e160f9-861e-5103-154b-83fde313428f.htm">GetHashCode</a></td><td> (Inherited from <a href="dc4df7f6-3cca-fe41-8115-9b4804ee8313.htm">MultiTermQueryWrapperFilter</a>.)</td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="88f87aa0-82c9-1216-a1b7-f2832822b19a.htm">GetPrefix</a></td><td /></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="85aca14a-5d8e-5b4d-e700-72ae305d43b5.htm">GetTotalNumberOfTerms</a></td><td><div class="summary"> Expert: Return the number of unique terms visited during execution of the filter.
            If there are many of them, you may consider using another filter type
            or optimize your total term count in index.
            <p />This method is not thread safe, be sure to only call it when no filter is running!
            If you re-use the same filter instance for another
            search, be sure to first reset the term counter
            with {@link #clearTotalNumberOfTerms}.
            </div> (Inherited from <a href="dc4df7f6-3cca-fe41-8115-9b4804ee8313.htm">MultiTermQueryWrapperFilter</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;declared;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="4f4cf168-33c8-832f-dde8-34ee1b80f643.htm">ToString</a></td><td><div class="summary">Prints a user-readable version of this query. </div> (Overrides <a href="49f21ae0-74c4-eacc-11f6-2e328b69e975.htm">MultiTermQueryWrapperFilter<span class="languageSpecificText"><span class="cs">.</span><span class="vb">.</span><span class="cpp">::</span><span class="nu">.</span><span class="fs">.</span></span>ToString<span class="languageSpecificText"><span class="cs">()</span><span class="cpp">()</span><span class="nu">()</span><span class="fs">()</span></span></a>.)</td></tr></table></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="74826dc1-4096-50d3-f6ed-8c0131a4ae21.htm">PrefixFilter Class</a></div><div class="seeAlsoStyle"><a href="5715bafd-c3a8-9ed0-225c-3c4cececbdc0.htm">Lucene.Net.Search Namespace</a></div></div></div><div id="footer"><div class="footerLine"><img width="100%" height="3px" src="../icons/footer.gif" alt="Footer image" title="Footer image" /></div><A NAME="feedback"></A><span id="fb" class="feedbackcss"></span></div></div></body></html>