AcceptStart

Body.AcceptStart method

Accepts a visitor for visiting the start of the document’s body.

public override VisitorAction AcceptStart(DocumentVisitor visitor)
ParameterTypeDescription
visitorDocumentVisitorThe document visitor.

Return Value

The action to be taken by the visitor.

Examples

Shows how to process absolute position tab characters with a document visitor.

public void DocumentToTxt()
{
    Document doc = new Document(MyDir + "Absolute position tab.docx");

    // Extract the text contents of our document by accepting this custom document visitor.
    DocTextExtractor myDocTextExtractor = new DocTextExtractor();
    Section fisrtSection = doc.FirstSection;
    fisrtSection.Body.Accept(myDocTextExtractor);
    // Visit only start of the document body.
    fisrtSection.Body.AcceptStart(myDocTextExtractor);
    // Visit only end of the document body.
    fisrtSection.Body.AcceptEnd(myDocTextExtractor);

    // The absolute position tab, which has no equivalent in string form, has been explicitly converted to a tab character.
    Assert.AreEqual("Before AbsolutePositionTab\tAfter AbsolutePositionTab", myDocTextExtractor.GetText());

    // An AbsolutePositionTab can accept a DocumentVisitor by itself too.
    AbsolutePositionTab absPositionTab = (AbsolutePositionTab)doc.FirstSection.Body.FirstParagraph.GetChild(NodeType.SpecialChar, 0, true);

    myDocTextExtractor = new DocTextExtractor();
    absPositionTab.Accept(myDocTextExtractor);

    Assert.AreEqual("\t", myDocTextExtractor.GetText());
}

/// <summary>
/// Collects the text contents of all runs in the visited document. Replaces all absolute tab characters with ordinary tabs.
/// </summary>
public class DocTextExtractor : DocumentVisitor
{
    public DocTextExtractor()
    {
        mBuilder = new StringBuilder();
    }

    /// <summary>
    /// Called when a Run node is encountered in the document.
    /// </summary>
    public override VisitorAction VisitRun(Run run)
    {
        AppendText(run.Text);
        return VisitorAction.Continue;
    }

    /// <summary>
    /// Called when an AbsolutePositionTab node is encountered in the document.
    /// </summary>
    public override VisitorAction VisitAbsolutePositionTab(AbsolutePositionTab tab)
    {
        mBuilder.Append("\t");
        return VisitorAction.Continue;
    }

    /// <summary>
    /// Adds text to the current output. Honors the enabled/disabled output flag.
    /// </summary>
    private void AppendText(string text)
    {
        mBuilder.Append(text);
    }

    /// <summary>
    /// Plain text of the document that was accumulated by the visitor.
    /// </summary>
    public string GetText()
    {
        return mBuilder.ToString();
    }

    private readonly StringBuilder mBuilder;
}

See Also

Body.AcceptEnd Body.EnsureMinimum