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Version Q1 2012 released 04/11/2012
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Editor / Built-in Content Filters

Filters in RadEditor are small code snippets, which are called in a sequence to process the editor content, when the mode (Html / Design / Preview) is switched or the page is submitted. This example demonstrates the use of the editor's built-in content filters:
   
 
 
  
   
Built-in filters














  • Built-in content filters

    Filters in RadEditor are small code snippets, which are called in a sequence to process the editor content, when the mode (html / design / preview) is switched. This example demonstrates the use of the editor's built-in content filters:

    • RemoveScripts: this filter removes script tags from the editor content. Disable the filter if you want to insert script tags in the content.
    • EncodeScripts: this filter encodes all script tags from the content.
    • MakeUrlsAbsolute: this filter makes all URLs in the editor content absolute (e.g. "http://server/page.html" instead of "page.html"). This filter is DISABLED by default.
    • FixUlBoldItalic: this filter changes the deprecated u tag to a span with CSS style.
    • IECleanAnchors Internet Explorer only - this filter removes the current page url from all anchor(#) links to the same page.
    • FixEnclosingP: this filter removes a parent paragraph tag if the whole content is inside it.
    • MozEmStrong: this filter changes b to strong and i to em in Mozilla browsers.
    • ConvertFontToSpan: this filter changes deprecated font tags to compliant span tags.
    • OptimizeSpans: this filter changes removes unneeded span elements.
    • ConvertToXhtml: this filter converts the HTML from the editor content area to XHTML.
    • IndentHTMLContent: this filter indents the HTML content so it is more readable when you view the code.
    • ConvertCharactersToEntities: this filter converts reserved characters to their html entity names.
    • PdfExportFilter: this filter fixes some pdf export issues.
    • ConvertInlineStylesToAttributes: this filter converts XHTML compliant inline style attributes to Email compliant element attributes.
    • DefaultFilters: the default editor behavior. All content filters except MakeUrlsAbsolute are activated.

Source Code

C# VB.NET
Show code in new window Demo isolation steps
  • <%@ Page Language="C#" Theme="Default" AutoEventWireup="true" CodeFile="DefaultCS.aspx.cs" Inherits="Telerik.Web.Examples.Editor.ContentFilters.DefaultCS" %>
    <%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
    <%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
    <%@ Register TagPrefix="qsf" TagName="Header" Src="~/Common/Header.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="HeadTag" Src="~/Common/HeadTag.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="Footer" Src="~/Common/Footer.ascx" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

    <html xmlns="http://www.w3.org/1999/xhtml" >
    <head runat="server">
        <qsf:headtag id="Headtag1" runat="server"/>
    </head>
    <body class="BODY">
        <form id="form1" runat="server">
        <qsf:header id="Header1" runat="server" navigationlanguage="c#"/>
        <telerik:RadScriptManager ID="ScriptManager1" runat="server" />    
        <telerik:RadFormDecorator ID="RadFormDecorator1" runat="server" DecoratedControls="All"></telerik:RadFormDecorator>
        <table cellspacing="0" cellpadding="0">
        <tr>
            <td style="vertical-align: top;">
                 
                <telerik:RadAjaxManager ID="RadAjax1" runat="server" >
                    <AjaxSettings>
                        <telerik:AjaxSetting AjaxControlID="SetFiltersButton" >
                            <UpdatedControls>
                                <telerik:AjaxUpdatedControl ControlID="RadEditor1" LoadingPanelID="LoadingPanel1" />
                            </UpdatedControls>
                        </telerik:AjaxSetting>
                        <telerik:AjaxSetting AjaxControlID="RestoreDefaults" >
                            <UpdatedControls>
                                <telerik:AjaxUpdatedControl ControlID="RadEditor1" LoadingPanelID="LoadingPanel1" />
                                <telerik:AjaxUpdatedControl ControlID="FiltersList" LoadingPanelID="LoadingPanel1" />
                            </UpdatedControls>
                        </telerik:AjaxSetting>
                    </AjaxSettings>
                </telerik:RadAjaxManager>
                <qsf:InformationBox ID="InformationBox1" runat="server">
                                Filters in RadEditor are small code snippets, which are called in a sequence
                                to process the editor content, when the mode (Html / Design / Preview) is switched or the page is submitted.
                                This example demonstrates the use of the editor's built-in content filters:
                </qsf:InformationBox>
                                
                        <telerik:radeditor runat="server" ID="RadEditor1" Height="330" EnableResize="false" SkinID="DefaultSetOfTools">
                            <Modules>
                                <telerik:EditorModule Name="RadEditorStatistics" DockingZone="Bottom" Visible="true" Enabled="true" />
                                <telerik:EditorModule Name="RadEditorDomInspector" Visible="false" Enabled="true" />
                                <telerik:EditorModule Name="RadEditorNodeInspector" Visible="false" Enabled="true" />
                                <telerik:EditorModule Name="RadEditorHtmlInspector" Visible="false" Enabled="true" />
                            </Modules>
                            <Content>
                               <img alt="product logo" src="../../Img/productLogoLight.gif" />is the successor of the well known industry standard Editor for ASP.NET. The tight integration with ASP.NET AJAX and the powerful new capabilities make Telerik's WYSIWYG Editor a flexible and lightweight component, turning it into the fastest loading Web Editor. Among the hottest features are:
                                <ul>
                                    <li><em>Single-file, drag-and-drop deployment</em></li>
                                    <li><em>Built on top of ASP.NET AJAX</em></li>
                                    <li><em>Unmatched loading speed with new semantic rendering </em></li>
                                    <li><em>Full keyboard accessibility</em></li>
                                    <li><em>Flexible Skinning mechanism</em></li>
                                    <li><em>Simplified and intuitive toolbar configuration</em></li>
                                    <li><em>Out-of-the-box XHTML-enabled output</em></li>
                                </ul>
                            </Content>
                        </telerik:radeditor>
                
            </td>
            <td style="padding: 25px 0 0 8px; vertical-align: top;" >
                <qsf:ConfiguratorPanel runat="server" ID="ConfigurationPanel1" Enabled="true" Title="Built-in filters"
                 Expanded="true" style="text-align:left;" HorizontalAlign="Right" Width="190">
                          <div style="padding: 3px; width: 200px;">
                                <asp:CheckBoxList ID="FiltersList" runat="server" >
                                    <asp:ListItem Text="RemoveScripts" Value="RemoveScripts" Selected="True"></asp:ListItem>
                                    <asp:ListItem Text="EncodeScripts" Value="EncodeScripts" Selected="True"></asp:ListItem>
                                    <asp:ListItem Text="MakeUrlsAbsolute" Value="MakeUrlsAbsolute" Selected="false"></asp:ListItem>
                                    <asp:ListItem Text="FixUlBoldItalic" Value="FixUlBoldItalic" Selected="True"></asp:ListItem>
                                    <asp:ListItem Text="FixEnclosingP" Value="FixEnclosingP" Selected="True"></asp:ListItem>
                                    <asp:ListItem Text="IECleanAnchors" Value="IECleanAnchors" Selected="True"></asp:ListItem>
                                    <asp:ListItem Text="MozEmStrong" Value="MozEmStrong" Selected="True"></asp:ListItem>
                                    <asp:ListItem Text="ConvertFontToSpan" Value="ConvertFontToSpan" Selected="True"></asp:ListItem>
                                    <asp:ListItem Text="OptimizeSpans" Value="OptimizeSpans" Selected="True"></asp:ListItem>
                                    <asp:ListItem Text="ConvertToXhtml" Value="ConvertToXhtml" Selected="True"></asp:ListItem>
                                    <asp:ListItem Text="ConvertCharactersToEntities" Value="ConvertCharactersToEntities" Selected="True"></asp:ListItem>
                                    <asp:ListItem Text="PdfExportFilter" Value="PdfExportFilter" Selected="false"></asp:ListItem>
                                    <asp:ListItem Text="IndentHTMLContent" Value="IndentHTMLContent" Selected="True"></asp:ListItem>
                                    <asp:ListItem Text="ConvertInlineStylesToAttributes" Value="ConvertInlineStylesToAttributes" Selected="false"></asp:ListItem>
                                </asp:CheckBoxList>
                                <div style="padding:5px">
                                    <asp:Button ID="SetFiltersButton" runat="server" Text="Set Built-in Filters" OnClick="SetFiltersButton_Click" />
                                </div>
                                <div style="padding:5px">
                                    <asp:Button ID="RestoreDefaults" runat="server" Text="Restore Defaults" OnClick="RestoreButton_Click" />
                                </div>
                            </div>

               </qsf:ConfiguratorPanel>
                <telerik:RadAjaxLoadingPanel Skin="Default" ID="LoadingPanel1" runat="server">
                 </telerik:RadAjaxLoadingPanel>

                </td>
            </tr>
        </table>
        
        

      

        
        <qsf:footer runat="server" id="Footer1"/>
        </form>
    </body>
    </html>

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