FieldSubject class

Implements the SUBJECT field.

To learn more, visit the Working with Fields documentation article.

public class FieldSubject : Field


FieldSubject()The default constructor.


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.
Text { get; set; }Gets or sets the text of the subject.
virtual Type { get; }Gets the Microsoft Word field type.


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.


Retrieves, and optionally sets, the document’s subject, as recorded in the Subject property of the built-in document properties.


Shows how to use the SUBJECT field.

Document doc = new Document();

// Set a value for the document's "Subject" built-in property.
doc.BuiltInDocumentProperties.Subject = "My subject";

// Create a SUBJECT field to display the value of that built-in property.
DocumentBuilder builder = new DocumentBuilder(doc);
FieldSubject field = (FieldSubject)builder.InsertField(FieldType.FieldSubject, true);

Assert.AreEqual(" SUBJECT ", field.GetFieldCode());
Assert.AreEqual("My subject", field.Result);

// If we give the SUBJECT field's Text property value and update it, the field will
// overwrite the current value of the "Subject" built-in property with the value of its Text property,
// and then display the new value.
field.Text = "My new subject";

Assert.AreEqual(" SUBJECT  \"My new subject\"", field.GetFieldCode());
Assert.AreEqual("My new subject", field.Result);

Assert.AreEqual("My new subject", doc.BuiltInDocumentProperties.Subject);

doc.Save(ArtifactsDir + "Field.SUBJECT.docx");

See Also