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    Content Service

    The Content service (MyEditor.Content, type IContentService) is the primary surface for programmatic edits to the live HTML document hosted by a WpfHtmlEditor control. It exposes get/set methods for body and document HTML, structural inserts (HTML fragments, horizontal rules, plain text, script blocks), file load/save helpers, head-element manipulation, base64 image embedding, mail-merge placeholder insertion, and table authoring.

    The service is owned by the editor and is created when the control is constructed. Do not create your own instance; always access it through MyEditor.Content. The service implements IDisposable; the editor disposes it automatically when the parent window closes. Methods that read or modify the live document require the editor to be in EditorModes.WysiwygDesign; calls made in HtmlEdit or Preview mode either do nothing or operate on the last-loaded document depending on the method.

    GetBodyText Method

    Returns the body's textual content with HTML markup stripped. Whitespace is collapsed per the browser's default rendering rules.

    Syntax
    string GetBodyText();
    Returns

    string -- the plain-text body content.

    Remarks

    See GetFormattedPlainText for an alternative implementation that preserves more of the document's visual line structure.

    Example
    string body = MyEditor.Content.GetBodyText();
Console.WriteLine($"Plain body has {body.Length} chars");
    Dim body As String = MyEditor.Content.GetBodyText()
Console.WriteLine($"Plain body has {body.Length} chars")

    GetFormattedPlainText Method

    Returns the document's text content with HTML markup stripped, using a formatting algorithm that preserves block-level line breaks. Alternative to GetBodyText when the visual line structure matters (e.g. piping to a plain-text email body).

    Syntax
    string GetFormattedPlainText();
    Returns

    string -- the formatted plain text.

    Example
    string formatted = MyEditor.Content.GetFormattedPlainText();
File.WriteAllText(@"C:\temp\export.txt", formatted);
    Dim formatted As String = MyEditor.Content.GetFormattedPlainText()
File.WriteAllText("C:\temp\export.txt", formatted)

    SetBodyText Method

    Replaces the body with the given plain text. HTML special characters in the input are escaped.

    Syntax
    void SetBodyText(string text);
    Parameters
    NameTypeDescription
    textstringThe text to set as the body content.
    Example
    MyEditor.Content.SetBodyText("Quarterly report draft - 2026 Q1");

    GetBodyHtml Method

    Returns the HTML between the <body> and </body> tags. Pass true for getInXhtml to receive well-formed XHTML (self-closing void tags, lowercase tag names); pass false for raw HTML.

    Syntax
    string GetBodyHtml(bool getInXhtml);
    Parameters
    NameTypeDescription
    getInXhtmlbooltrue to receive XHTML-clean output; false for raw MSHTML output.
    Returns

    string -- the body HTML.

    Example
    string xhtml = MyEditor.Content.GetBodyHtml(getInXhtml: true);
XDocument doc = XDocument.Parse("<root>" + xhtml + "</root>");
    Dim xhtml As String = MyEditor.Content.GetBodyHtml(getInXhtml:=True)
Dim doc As XDocument = XDocument.Parse("<root>" & xhtml.ToString() & "</root>")

    SetBodyHtml Method

    Replaces the document's body HTML.

    Syntax
    void SetBodyHtml(string bodyHtml);
    Parameters
    NameTypeDescription
    bodyHtmlstringThe new inner HTML of the body.
    Example
    MyEditor.Content.SetBodyHtml("<h1>Welcome</h1><p>Edit me.</p>");

    GetDocumentHtml Method

    Returns the full HTML document including the <html>, <head>, and <body> markup.

    Syntax
    string GetDocumentHtml();
    Returns

    string -- the complete HTML document.

    Example
    string fullDoc = MyEditor.Content.GetDocumentHtml();
File.WriteAllText(@"C:\temp\out.html", fullDoc, Encoding.UTF8);
    Dim fullDoc As String = MyEditor.Content.GetDocumentHtml()
File.WriteAllText("C:\temp\out.html", fullDoc, Encoding.UTF8)

    SetDocumentHtml Method

    Replaces the entire HTML document.

    Syntax
    void SetDocumentHtml(string docHtml);
    Parameters
    NameTypeDescription
    docHtmlstringThe new HTML document including <html>, <head> and <body>.
    Example
    string template = File.ReadAllText(@"C:\templates\letter.html");
MyEditor.Content.SetDocumentHtml(template);
    Dim template As String = File.ReadAllText("C:\templates\letter.html")
MyEditor.Content.SetDocumentHtml(template)

    GetDocumentXml Method

    Returns the document serialized as XML (XHTML-equivalent markup). Useful for pipelines that expect XML rather than HTML on the wire.

    Syntax
    string GetDocumentXml();
    Returns

    string -- the document as XML.

    Example
    string xml = MyEditor.Content.GetDocumentXml();
XDocument.Parse(xml).Save(@"C:\temp\doc.xml");
    Dim xml As String = MyEditor.Content.GetDocumentXml()
XDocument.Parse(xml).Save("C:\temp\doc.xml")

    GetBodyStyleAsDom Method

    Returns the body element's style object as an MSHTML IHTMLStyle COM pointer for direct property-level access (font-family, color, padding, etc.) without parsing the style string.

    Syntax
    IHTMLStyle GetBodyStyleAsDom();
    Returns

    mshtml.IHTMLStyle -- the body's live style object.

    Example
    IHTMLStyle style = MyEditor.Content.GetBodyStyleAsDom();
if (style != null)
{
    style.backgroundColor = "#fafafa";
    style.color = "#222";
}
    Dim style As IHTMLStyle = MyEditor.Content.GetBodyStyleAsDom()

If style IsNot Nothing Then
    style.backgroundColor = "#fafafa"
    style.color = "#222"
End If

    GetBodyStyle Method

    Returns the value of the style attribute on the body element as a single CSS string.

    Syntax
    string GetBodyStyle();
    Returns

    string -- the inline body CSS rules.

    Example
    string css = MyEditor.Content.GetBodyStyle();
Debug.WriteLine($"Body inline CSS = {css}");
    Dim css As String = MyEditor.Content.GetBodyStyle()
Debug.WriteLine($"Body inline CSS = {css}")

    SetBodyStyle Method

    Sets the value of the style attribute on the body element.

    Syntax
    void SetBodyStyle(string styleValue);
    Parameters
    NameTypeDescription
    styleValuestringThe CSS rules to place on the body style attribute.
    Example
    MyEditor.Content.SetBodyStyle("font-family:Segoe UI; padding:12px; color:#222;");

    GetBodyClassName Method

    Returns the value of the class attribute on the document's body element. Equivalent to reading WpfHtmlEditor.BodyCSSClassName.

    Syntax
    string GetBodyClassName();
    Returns

    string -- the body class name, or empty if no class is set.

    Example
    if (MyEditor.Content.GetBodyClassName() != "dark")
    MyEditor.Content.SetBodyClassName("dark");
    If MyEditor.Content.GetBodyClassName() IsNot "dark" Then MyEditor.Content.SetBodyClassName("dark")

    SetBodyClassName Method

    Sets the value of the class attribute on the document's body element. Equivalent to writing WpfHtmlEditor.BodyCSSClassName.

    Syntax
    void SetBodyClassName(string className);
    Parameters
    NameTypeDescription
    classNamestringThe CSS class name; pass null or empty to clear.
    Example
    MyEditor.Content.SetBodyClassName("print-preview");

    GetAllLinkHrefs Method

    Returns the href values of every <a> hyperlink in the document, in document order.

    Syntax
    string[] GetAllLinkHrefs();
    Returns

    string[] -- the array of hyperlink hrefs; empty array if there are no hyperlinks.

    Example
    foreach (string href in MyEditor.Content.GetAllLinkHrefs())
{
    if (!Uri.IsWellFormedUriString(href, UriKind.Absolute))
        Debug.WriteLine($"Broken link: {href}");
}
    For Each href As String In MyEditor.Content.GetAllLinkHrefs()
    If Not Uri.IsWellFormedUriString(href, UriKind.Absolute) Then Debug.WriteLine($"Broken link: {href}")
Next

    GetAllImageSources Method

    Returns the src values of every <img> element in the document, in document order.

    Syntax
    string[] GetAllImageSources();
    Returns

    string[] -- the array of image source values; empty array if there are no images.

    Example
    string[] images = MyEditor.Content.GetAllImageSources();
MessageBox.Show($"Document references {images.Length} image(s).");
    Dim images As String() = MyEditor.Content.GetAllImageSources()
MessageBox.Show($"Document references {images.Length} image(s).")

    InsertHtml Method

    Inserts an HTML fragment at the current caret position without losing focus. The canonical way to inject content from a custom toolbar button. Script blocks are not inserted by this method -- use InsertScript or InsertHtmlBetweenHead instead.

    Syntax
    void InsertHtml(string htmlText, bool keepSelected);
    Parameters
    NameTypeDescription
    htmlTextstringThe HTML fragment to insert.
    keepSelectedboolIf true, the inserted fragment is left selected after insertion; otherwise the caret is placed after it.
    Example
    MyEditor.Content.InsertHtml("<strong>Hello</strong>", keepSelected: false);
    MyEditor.Content.InsertHtml("<strong>Hello</strong>", keepSelected:=False)

    InsertText Method

    Inserts a plain-text string at the current caret position. HTML entities in the input are escaped (so < becomes &lt;).

    Syntax
    void InsertText(string text);
    Parameters
    NameTypeDescription
    textstringThe text to insert.
    Example
    MyEditor.Content.InsertText(DateTime.Now.ToString("yyyy-MM-dd HH:mm"));

    InsertHorizontalRule Method

    Inserts an <hr> element at the current caret position.

    Syntax
    void InsertHorizontalRule();
    Example
    private void DividerButton_Click(object sender, RoutedEventArgs e)
{
    MyEditor.Content.InsertHorizontalRule();
}
    Private Sub DividerButton_Click(sender As Object, e As RoutedEventArgs)
    MyEditor.Content.InsertHorizontalRule()
End Sub

    InsertScript Method

    Inserts a <script> block at the current caret position. Provided because InsertHtml deliberately filters out script content.

    Syntax
    void InsertScript(string scriptMarkUp);
    Parameters
    NameTypeDescription
    scriptMarkUpstringThe script markup to insert.
    Example
    MyEditor.Content.InsertScript("<script>console.log('hi');</script>");

    InsertHtmlBetweenHead Method

    Appends the given HTML to the document's <head> section. Use this to inject <meta>, <link>, <style>, or <script> elements that should live in the head rather than the body.

    Syntax
    void InsertHtmlBetweenHead(string insertingHtml);
    Parameters
    NameTypeDescription
    insertingHtmlstringThe HTML to insert into the head.
    Example
    MyEditor.Content.InsertHtmlBetweenHead(

    "<style id='theme'>body { background:#222; color:#eee; }</style>");

    RemoveHtmlElementFromHeadByTag Method

    Removes every element with the given tag name from the document <head>. Pass meta to clear all meta tags or style to clear all inline style blocks. Tag matching is case-insensitive.

    Syntax
    void RemoveHtmlElementFromHeadByTag(string tagName);
    Parameters
    NameTypeDescription
    tagNamestringThe tag name to match (case-insensitive).
    Example
    // Clear all stylesheet links before reapplying a fresh theme.

MyEditor.Content.RemoveHtmlElementFromHeadByTag("link");

    RemoveHtmlElementFromHeadById Method

    Removes the element with the given id from the document <head>. Useful for clearing stale <style> or <link> blocks the host app injected earlier.

    Syntax
    void RemoveHtmlElementFromHeadById(string id);
    Parameters
    NameTypeDescription
    idstringThe id of the head element to remove.
    Example
    MyEditor.Content.RemoveHtmlElementFromHeadById("theme");

    RemoveHtmlElementById Method

    Removes the element with the given id from anywhere in the document. No-op if no matching element exists.

    Syntax
    void RemoveHtmlElementById(string id);
    Parameters
    NameTypeDescription
    idstringThe id of the element to remove.
    Example
    MyEditor.Content.RemoveHtmlElementById("legacyBanner");

    ChangeElementId Method

    Renames an element's id attribute from oldId to newId. No-op if no element with oldId exists.

    Syntax
    void ChangeElementId(string oldId, string newId);
    Parameters
    NameTypeDescription
    oldIdstringThe current id of the element.
    newIdstringThe new id to assign.
    Example
    MyEditor.Content.ChangeElementId("intro", "introduction");

    ElementExists Method

    Returns whether an element with the given id exists anywhere in the document (head or body).

    Syntax
    bool ElementExists(string elementId);
    Parameters
    NameTypeDescription
    elementIdstringThe element id to look up.
    Returns

    bool -- true if an element with that id exists; otherwise false.

    Example
    if (!MyEditor.Content.ElementExists("footer"))
    MyEditor.Content.InsertHtml("<div id='footer'>(c) 2026</div>", false);
    If Not MyEditor.Content.ElementExists("footer") Then MyEditor.Content.InsertHtml("<div id='footer'>(c) 2026</div>", False)

    GetAttributeValueOfAnElement Method

    Returns the value of the named attribute on the element identified by elementId. Useful for reading the href of a stylesheet link or the content of a meta tag in the document head.

    Syntax
    string GetAttributeValueOfAnElement(string elementId, string attributeName);
    Parameters
    NameTypeDescription
    elementIdstringThe id of the element to inspect.
    attributeNamestringThe attribute name to read.
    Returns

    string -- the attribute value, or null/empty if the element or attribute is absent.

    Example
    string href = MyEditor.Content.GetAttributeValueOfAnElement("mainLink", "href");
    Dim href As String = MyEditor.Content.GetAttributeValueOfAnElement("mainLink", "href")

    SetAttributeValueOfAnElement Method

    Sets the value of an attribute on the element identified by elementId. Use this to update a head-element attribute (such as a stylesheet link's href) without rewriting the entire document head.

    Syntax
    void SetAttributeValueOfAnElement(string elementId, string attributeName, string value);
    Parameters
    NameTypeDescription
    elementIdstringThe id of the element to update.
    attributeNamestringThe attribute name to set.
    valuestringThe new attribute value.
    Example
    MyEditor.Content.SetAttributeValueOfAnElement("logo", "alt", "Company logo");

    GetOuterHtmlOfAnElement Method

    Returns the outer HTML (element + its child markup) of the element identified by elementId.

    Syntax
    string GetOuterHtmlOfAnElement(string elementId);
    Parameters
    NameTypeDescription
    elementIdstringThe id of the element to inspect.
    Returns

    string -- the element's outer HTML, or null if not found.

    Example
    string outerHtml = MyEditor.Content.GetOuterHtmlOfAnElement("intro");
Debug.WriteLine(outerHtml);
    Dim outerHtml As String = MyEditor.Content.GetOuterHtmlOfAnElement("intro")
Debug.WriteLine(outerHtml)

    GetInnerHtmlOfAnElement Method

    Returns the inner HTML (child markup) of the element identified by elementId.

    Syntax
    string GetInnerHtmlOfAnElement(string elementId);
    Parameters
    NameTypeDescription
    elementIdstringThe id of the element to inspect.
    Returns

    string -- the element's inner HTML, or null if the element is not found.

    Example
    string innerHtml = MyEditor.Content.GetInnerHtmlOfAnElement("sidebar");
    Dim innerHtml As String = MyEditor.Content.GetInnerHtmlOfAnElement("sidebar")

    UpdateInnerHtmlOfAnElement Method

    Replaces the inner HTML of the element identified by elementId. Existing children are discarded.

    Syntax
    void UpdateInnerHtmlOfAnElement(string elementId, string newHtml);
    Parameters
    NameTypeDescription
    elementIdstringThe id of the element to update.
    newHtmlstringThe new inner HTML.
    Example
    MyEditor.Content.UpdateInnerHtmlOfAnElement("status", "<b>Updated</b>");

    GetHtmlElements Method

    Returns a strongly-typed collection of the document's elements. Pass true for onlyBodyElements to limit the walk to elements under <body>; pass false to include head elements as well.

    Syntax
    HtmlElementCollection GetHtmlElements(bool onlyBodyElements);
    Parameters
    NameTypeDescription
    onlyBodyElementsbooltrue to restrict the walk to body descendants.
    Returns

    System.Windows.Forms.HtmlElementCollection -- the document's elements.

    Example
    var elements = MyEditor.Content.GetHtmlElements(onlyBodyElements: true);
foreach (HtmlElement el in elements)
{
    if (el.TagName == "IMG")
        Debug.WriteLine(el.GetAttribute("src"));
}
    Dim elements = MyEditor.Content.GetHtmlElements(onlyBodyElements:=True)

For Each el As HtmlElement In elements
    If el.TagName Is "IMG" Then Debug.WriteLine(el.GetAttribute("src"))
Next

    GetBodyIHtmlElements Method

    Returns the body's child elements as an MSHTML IHTMLElementCollection COM pointer, for callers that need to walk the DOM directly.

    Syntax
    IHTMLElementCollection GetBodyIHtmlElements();
    Returns

    mshtml.IHTMLElementCollection -- the live element collection.

    Example
    IHTMLElementCollection coll = MyEditor.Content.GetBodyIHtmlElements();
foreach (IHTMLElement el in coll)
    Debug.WriteLine(el.tagName);
    Dim coll As IHTMLElementCollection = MyEditor.Content.GetBodyIHtmlElements()

For Each el As IHTMLElement In coll
    Debug.WriteLine(el.tagName)
Next

    GetHtmlElementAt Method

    Returns the topmost HTML element under the given pixel point inside the editor's document. Useful when implementing custom mouse-driven UI such as drag-targets or hit-test overlays.

    Syntax
    IHTMLElement GetHtmlElementAt(Point caretPosition);
    Parameters
    NameTypeDescription
    caretPositionSystem.Drawing.PointPixel coordinates inside the editor document.
    Returns

    mshtml.IHTMLElement -- the element at that point, or null if none.

    Example
    IHTMLElement hit = MyEditor.Content.GetHtmlElementAt(new System.Drawing.Point(120, 80));
if (hit != null)
    Debug.WriteLine($"Hit: {hit.tagName}#{hit.id}");
    Dim hit As IHTMLElement = MyEditor.Content.GetHtmlElementAt(New System.Drawing.Point(120, 80))
If hit IsNot Nothing Then Debug.WriteLine($"Hit: {hit.tagName}#{hit.id}")

    EmbedLocalImagesAsBase64 Method

    Walks the document, finds every <img> element whose src is a local file path or file:// URL, reads each file, and rewrites the src as a data:image/...;base64,... URI. After this call the document is self-contained -- safe to email or save as a single HTML file.

    Syntax
    void EmbedLocalImagesAsBase64();
    Example
    MyEditor.Content.EmbedLocalImagesAsBase64();
string portableHtml = MyEditor.Content.GetDocumentHtml();
File.WriteAllText(@"C:\temp\portable.html", portableHtml);
    MyEditor.Content.EmbedLocalImagesAsBase64()
Dim portableHtml As String = MyEditor.Content.GetDocumentHtml()
File.WriteAllText("C:\temp\portable.html", portableHtml)

    GetEmailMessageWithLocalImagesEmbedded Method

    Builds a System.Net.Mail.MailMessage whose body is the current document HTML and whose linked resources contain every local image referenced by the document. Use this to send the editor's content as a properly-formed multipart email without writing your own MIME packaging.

    Syntax
    MailMessage GetEmailMessageWithLocalImagesEmbedded();
    Returns

    System.Net.Mail.MailMessage -- the assembled mail message ready to hand to SmtpClient.Send.

    Example
    using (MailMessage msg = MyEditor.Content.GetEmailMessageWithLocalImagesEmbedded())
{
    msg.From = new MailAddress("you@example.com");
    msg.To.Add("customer@example.com");
    msg.Subject = "Monthly report";
    new SmtpClient("smtp.example.com").Send(msg);
}
    Using msg As MailMessage = MyEditor.Content.GetEmailMessageWithLocalImagesEmbedded()
    msg.From = New MailAddress("you@example.com")
    msg.[To].Add("customer@example.com")
    msg.Subject = "Monthly report"
    Call New SmtpClient("smtp.example.com").Send(msg)
End Using

    LoadBodyHtmlFromFile Method

    Reads a file from disk and loads its contents into the editor's body HTML, replacing any existing body content. The remainder of the document (head, doctype) is preserved.

    Syntax
    void LoadBodyHtmlFromFile(string filePath, Encoding encoding);
    Parameters
    NameTypeDescription
    filePathstringPath to the file to load.
    encodingSystem.Text.EncodingText encoding to use when reading the file (e.g. Encoding.UTF8).
    Example
    MyEditor.Content.LoadBodyHtmlFromFile(@"C:\templates\body.html", Encoding.UTF8);

    LoadDocumentHtmlFromFile Method

    Reads a file from disk and loads its contents as the entire document HTML, replacing the whole <html>...</html> tree.

    Syntax
    void LoadDocumentHtmlFromFile(string filePath, Encoding encoding);
    Parameters
    NameTypeDescription
    filePathstringPath to the file to load.
    encodingSystem.Text.EncodingText encoding to use when reading the file.
    Example
    MyEditor.Content.LoadDocumentHtmlFromFile(@"C:\templates\letter.html", Encoding.UTF8);

    SaveBodyHtmlToFile Method

    Writes the current body HTML to a file on disk.

    Syntax
    void SaveBodyHtmlToFile(string filePath);
    Parameters
    NameTypeDescription
    filePathstringTarget file path. An existing file is overwritten.
    Example
    MyEditor.Content.SaveBodyHtmlToFile(@"C:\out\fragment.html");

    SaveDocumentHtmlToFile Method

    Writes the current full document HTML to a file on disk.

    Syntax
    void SaveDocumentHtmlToFile(string filePath);
    Parameters
    NameTypeDescription
    filePathstringTarget file path. An existing file is overwritten.
    Example
    MyEditor.Content.SaveDocumentHtmlToFile(@"C:\out\full.html");

    SaveEditorContentAsXml Method

    Serializes the document HTML as XML and writes it to a file. Provided for host apps that store editor content as XML rather than HTML.

    Syntax
    void SaveEditorContentAsXml(string fileName);
    Parameters
    NameTypeDescription
    fileNamestringThe XML file path to write.
    Example
    MyEditor.Content.SaveEditorContentAsXml(@"C:\out\snapshot.xml");

    OpenFile Method

    Opens a file and loads its contents into the editor, auto-detecting whether the file holds a body fragment or a full HTML document. Fires the editor's FileOpened event on success.

    Syntax
    void OpenFile(string filePath);
    Parameters
    NameTypeDescription
    filePathstringPath to the file to open.
    Example
    var dlg = new Microsoft.Win32.OpenFileDialog
{
    Filter = "HTML files|*.html;*.htm"
};
if (dlg.ShowDialog() == true)
    MyEditor.Content.OpenFile(dlg.FileName);
        Dim dlg = New Microsoft.Win32.OpenFileDialog With {
.Filter = "HTML files|*.html;*.htm"
    }
    If dlg.ShowDialog() Is True Then MyEditor.Content.OpenFile(dlg.FileName)

    ClearContent Method

    Removes all content from the document body, leaving an empty editable surface. The document's head, DOCTYPE, and configured base URL are preserved.

    Syntax
    void ClearContent();
    Example
    private void NewDocument_Click(object sender, RoutedEventArgs e)
{
    MyEditor.Content.ClearContent();
}
    Private Sub NewDocument_Click(sender As Object, e As RoutedEventArgs)
    MyEditor.Content.ClearContent()
End Sub

    UpdateBaseUrl Method

    Updates the document's base URL used to resolve relative resource paths. Equivalent to assigning WpfHtmlEditor.BaseUrl but does not trigger a behavior repair.

    Syntax
    void UpdateBaseUrl(string baseUrl);
    Parameters
    NameTypeDescription
    baseUrlstringThe new base URL.
    Example
    MyEditor.Content.UpdateBaseUrl("https://cdn.example.com/assets/");

    GetRightToLeft Method

    Returns the right-to-left (RTL) reading direction of the document body.

    Syntax
    RightToLeft GetRightToLeft();
    Returns

    System.Windows.Forms.RightToLeft -- one of No, Yes, or Inherit.

    Example
    RightToLeft rtl = MyEditor.Content.GetRightToLeft();

Debug.WriteLine($"Current RTL mode = {rtl}");

    SetRightToLeft Method

    Sets the document body's reading direction (RTL/LTR).

    Syntax
    void SetRightToLeft(RightToLeft rightToLeftValue);
    Parameters
    NameTypeDescription
    rightToLeftValueSystem.Windows.Forms.RightToLeftOne of No, Yes, or Inherit.
    Example
    MyEditor.Content.SetRightToLeft(RightToLeft.Yes);

    ResetTableManipulator Method

    Releases and recreates the internal table-manipulation engine. Call this after replacing the document HTML programmatically if subsequent table operations behave unexpectedly.

    Syntax
    void ResetTableManipulator();
    Example
    MyEditor.Content.SetBodyHtml(rebuiltHtml);

MyEditor.Content.ResetTableManipulator();

    Dispose Method (inherited from IDisposable)

    Releases unmanaged resources held by the content service. The control disposes its services automatically when the parent window closes; host applications normally do not call this directly.

    Syntax
    void Dispose();
    Example
    // The host control owns disposal -- only call this if you took ownership of the service.

MyEditor.Content.Dispose();

    TableAuthoringService Property

    Returns (or replaces) the table-authoring service (ITableAuthoringService) used to insert, delete, and merge rows, columns, and cells of the table containing the current selection.

    Syntax
    ITableAuthoringService TableAuthoringService { get; set; }
    Property value

    ITableAuthoringService -- the table-authoring service.

    Remarks

    Members: void InsertColumn(InsertPositions position), void DeleteColumn(), void InsertRow(InsertPositions position), void DeleteRow(), void MergeSelectedCells(), bool CanMergeCells(), void ShowGuidelinesForTablesWithZeroBorder(bool inBackground = false), void HideGuidelinesOfTablesWithZeroBorder(bool inBackground = false), bool IsTableBorderZero(IHTMLElement tableElement), Color SelectedCellBackgroundColor { get; set; }, bool EnableTableCellMerging { get; set; }, ITableManipulator GetTableManipulator(), void ResetTableManipulator(). Cell-merge operations require EnableTableCellMerging == true; the guideline overlay is controlled jointly with Options.ShowZeroBorderGuideline.

    Example
    var tas = MyEditor.Content.TableAuthoringService;
tas.InsertRow(InsertPositions.Below);
if (tas.CanMergeCells())
    tas.MergeSelectedCells();
    Dim tas = MyEditor.Content.TableAuthoringService
tas.InsertRow(InsertPositions.Below)
If tas.CanMergeCells() Then tas.MergeSelectedCells()

    MailMerge Property

    Returns the mail-merge placeholder service (IMailMergeService). The service exposes the host-registered PlaceholderFields list, the InsertPlaceholder(field) method, and the PlaceholderInserted event. Also accessible directly as MyEditor.MailMerge.

    Syntax
    IMailMergeService MailMerge { get; }
    Property value

    IMailMergeService -- the mail-merge service.

    Remarks

    Members: IList<PlaceholderField> PlaceholderFields { get; set; } -- the fields the end user can insert; event EventHandler<PlaceholderInsertedEventArgs> PlaceholderInserted -- fires after each insertion; void InsertPlaceholder(PlaceholderField field) -- inserts a placeholder span at the current caret position. Insertion requires EditorMode == WysiwygDesign.

    Example
    MyEditor.Content.MailMerge.PlaceholderFields = new List<PlaceholderField>
{
    new PlaceholderField
    {
        Name = "FirstName",
        DisplayLabel = "First Name"
    },
    new PlaceholderField
    {
        Name = "OrderTotal",
        DisplayLabel = "Order Total"
    }
};
MyEditor.Content.MailMerge.PlaceholderInserted += (s, e) => Debug.WriteLine($"Inserted {e.Field.Name}: {e.InsertedHtml}");
        MyEditor.Content.MailMerge.PlaceholderFields = New List(Of PlaceholderField) From {
    New PlaceholderField With {
    .Name = "FirstName",
    .DisplayLabel = "First Name"
},
    New PlaceholderField With {
    .Name = "OrderTotal",
    .DisplayLabel = "Order Total"
}
    }
    MyEditor.Content.MailMerge.PlaceholderInserted += Function(s, e) Debug.WriteLine($"Inserted {e.Field.Name}: {e.InsertedHtml}")

    Last updated on May 14, 2026