</ iframe > </noscript> <!-- End Google Tag Manager (noscript) --> <div id="BeforeHeaderContent"> </div> <div id="HeaderContent"> <!--DXMETADATA start type="Literal" condition="communityenabled" value="%%scrap:name=_COMMUNITY_RATING%%" --><!--DXMETADATA end --> <!--DXMETADATA start type="LogoImage" --><!--DXMETADATA end--> <div id="ProjectTitle"><!--DXMETADATA start type="ProjectTitle" -->WPF and Silverlight Edition Basic Library <!--DXMETADATA end--></div> <div id="PageTitle"><div id="PageTitleText"><!--DXMETADATA start type="ItemTitle" -->TreeView Virtualization<!--DXMETADATA end--></div></div> </div> <div id="AfterHeaderContent"> <!-- Spacing --> <span id="ToggleAllSectionsLink" class="FunctionLink"> <label id="CollapseAllLabel"><!--DXMETADATA start type="Phrase" name="COLLAPSE_ALL" -->Collapse All<!--DXMETADATA end--></label> <label id="ExpandAllLabel" style="display: none;"><!--DXMETADATA start type="Phrase" name="EXPAND_ALL" -->Expand All<!--DXMETADATA end--></label> </span><!--DXMETADATA start type="Literal" condition="communityenabled" value="%%scrap:name=_COMMUNITY_DROPDOWN%%" --><!--DXMETADATA end --> </div> <!--DXMETADATA start type="Breadcrumbs" scrap="_BREADCRUMBS" --><div class="BreadcrumbsContainer"><table><tr><td> <a href="WPF and Silverlight Edition Basic Library.html">WPF and Silverlight Edition Basic Library</a> > <a href="TreeView .html">TreeView </a> > TreeView Features > TreeView Virtualization</td></tr></table></div><!--DXMETADATA end --> <div id="BodyContent"> <!--DXMETADATA start type="TopicSection" name="BodyText"--><p><a href="C1.WPF.4~C1.WPF.C1TreeView.html">C1TreeView</a> supports UI virtualization for hierarchical data. Virtualization is an optimization to avoid constructing and rendering the container objects for items that are not visible. When the virtualization is enabled for <strong>C1TreeView</strong> it creates only the treeview items needed to display the items that are visible on screen. For example, suppose we have a <strong>C1TreeView</strong> with 10,000 items, but only 50 are visible at any time.Without virtualization, the <strong>C1TreeView</strong> would take a long time to render 10,000 treeview items even though only 50 treeview items are visbile.With virtualization the <strong>C1TreeView</strong> would only create what is needed to display in this case only 50 treeview items. As a result, using virtualization when needed would improve performance.</p> <p>The UI Virtualization is disabled in <strong>C1TreeView</strong>, by default. To enable it you can use the following markup:</p> <div class="FilteredContentCS" data-title="CS" data-itemid="CS"> <table class="SyntaxTable"> <tbody> <tr> <th>XAML</th> <th> <div class="CopyCodeWrapper"> <span class="CopyCode">Copy Code</span> </div> </th> </tr> <tr> <td colspan="2"> <pre> <TreeView VirtualizingStackPanel.IsVirtualizing=<span style="COLOR: #800000">"True"</span> … /> </pre> </td> </tr> </tbody> </table> </div> <p> </p><!--DXMETADATA end--> <a name="seealsobookmark"></a> <!--DXMETADATA start type="FilteredItemList" scrap="CATEGORISED_LINKS" namespace="linkcategory" source="Item" filter="" NoHeader="True" NoFooter="True" format="%%replaceinquotes:value=false%%%%scrap:name=_COLLAPSIBLE_HEADER,idprefix=seealso,caption=""%%phrase:name=SeeAlso%%%%designlist:tagidentifier=seealso,itemtype=See Also%%""%%%%filtereditemlist%%</div>"--><!--DXMETADATA end--> </div> <div id="FooterContent"> <!--DXMETADATA start type="Scrap" condition="communityenabled" name="_COMMUNITY_FOOTER" --><!--DXMETADATA end --> <!--DXMETADATA start type="Variable" name="CopyrightNotice" format="<p> </p><p> </p><hr style=""height: 1px"" /><p>%%variable%%</p>" --><p> </p><p> </p><hr style="height: 1px"><p>Copyright © <script type="text/javascript"> var theDate=new Date() document.write(theDate.getFullYear()) </script> GrapeCity, inc. All rights reserved.</p><!--DXMETADATA end --> <!--DXMETADATA start type="Variable" name="FeedbackLink" format="" --><a href="http://our.componentone.com/groups/" target="_blank">Product Support Forum</a> | <a href="http://feedback.componentone.com/forums/272000-wpf-and-silverlight-documentation" target="_blank">Documentation Feedback</a> <!--DXMETADATA end--> </div> </body> </html>