FieldPrivate

FieldPrivate class

Implements the PRIVATE field.

public class FieldPrivate : Field

Constructors

Name Description
FieldPrivate() The default constructor.

Properties

Name Description
DisplayResult { get; } Gets the text that represents the displayed field result.
End { get; } Gets the node that represents the field end.
Format { get; } Gets a FieldFormat object that provides typed access to field’s formatting.
IsDirty { get; set; } Gets or sets whether the current result of the field is no longer correct (stale) due to other modifications made to the document.
IsLocked { get; set; } Gets or sets whether the field is locked (should not recalculate its result).
LocaleId { get; set; } Gets or sets the LCID of the field.
Result { get; set; } Gets or sets text that is between the field separator and field end.
Separator { get; } Gets the node that represents the field separator. Can be null.
Start { get; } Gets the node that represents the start of the field.
virtual Type { get; } Gets the Microsoft Word field type.

Methods

Name Description
GetFieldCode() Returns text between field start and field separator (or field end if there is no separator). Both field code and field result of child fields are included.
GetFieldCode(bool) Returns text between field start and field separator (or field end if there is no separator).
Remove() Removes the field from the document. Returns a node right after the field. If the field’s end is the last child of its parent node, returns its parent paragraph. If the field is already removed, returns null.
Unlink() Performs the field unlink.
Update() Performs the field update. Throws if the field is being updated already.
Update(bool) Performs a field update. Throws if the field is being updated already.

Remarks

Provides a private storage area. This field is used to store data for documents converted from other file formats.

Examples

Shows how to process PRIVATE fields.

{
    // Open a Corel WordPerfect document which we have converted to .docx format.
    Document doc = new Document(MyDir + "Field sample - PRIVATE.docx");

    // WordPerfect 5.x/6.x documents like the one we have loaded may contain PRIVATE fields.
    // Microsoft Word preserves PRIVATE fields during load/save operations,
    // but provides no functionality for them.
    FieldPrivate field = (FieldPrivate)doc.Range.Fields[0];

    Assert.AreEqual(" PRIVATE \"My value\" ", field.GetFieldCode());
    Assert.AreEqual(FieldType.FieldPrivate, field.Type);

    // We can also insert PRIVATE fields using a document builder.
    DocumentBuilder builder = new DocumentBuilder(doc);
    builder.InsertField(FieldType.FieldPrivate, true);

    // These fields are not a viable way of protecting sensitive information.
    // Unless backward compatibility with older versions of WordPerfect is essential,
    // we can safely remove these fields. We can do this using a DocumentVisiitor implementation.
    Assert.AreEqual(2, doc.Range.Fields.Count);

    FieldPrivateRemover remover = new FieldPrivateRemover();
    doc.Accept(remover);

    Assert.AreEqual(2, remover.GetFieldsRemovedCount());
    Assert.AreEqual(0, doc.Range.Fields.Count);
}

/// <summary>
/// Removes all encountered PRIVATE fields.
/// </summary>
public class FieldPrivateRemover : DocumentVisitor
{
    public FieldPrivateRemover()
    {
        mFieldsRemovedCount = 0;
    }

    public int GetFieldsRemovedCount()
    {
        return mFieldsRemovedCount;
    }

    /// <summary>
    /// Called when a FieldEnd node is encountered in the document.
    /// If the node belongs to a PRIVATE field, the entire field is removed.
    /// </summary>
    public override VisitorAction VisitFieldEnd(FieldEnd fieldEnd)
    {
        if (fieldEnd.FieldType == FieldType.FieldPrivate)
        {
            fieldEnd.GetField().Remove();
            mFieldsRemovedCount++;
        }

        return VisitorAction.Continue;
    }

    private int mFieldsRemovedCount;
}

See Also