FieldFillIn class

Implements the FILLIN field.

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

public class FieldFillIn : Field


FieldFillIn()The default constructor.


DefaultResponse { get; set; }Gets or sets default user response (initial value contained in the prompt window).
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.
PromptOnceOnMailMerge { get; set; }Gets or sets whether the user response should be recieved once per a mail merge operation.
PromptText { get; set; }Gets or sets the prompt text (the title of the prompt window).
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.


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.


Prompts the user to enter text.


Shows how to use the FILLIN field to prompt the user for a response.

public void FieldFillIn()
    Document doc = new Document();
    DocumentBuilder builder = new DocumentBuilder(doc);

    // Insert a FILLIN field. When we manually update this field in Microsoft Word,
    // it will prompt us to enter a response. The field will then display the response as text.
    FieldFillIn field = (FieldFillIn)builder.InsertField(FieldType.FieldFillIn, true);
    field.PromptText = "Please enter a response:";
    field.DefaultResponse = "A default response.";

    // We can also use these fields to ask the user for a unique response for each page
    // created during a mail merge done using Microsoft Word.
    field.PromptOnceOnMailMerge = true;

    Assert.AreEqual(" FILLIN  \"Please enter a response:\" \\d \"A default response.\" \\o", field.GetFieldCode());

    FieldMergeField mergeField = (FieldMergeField)builder.InsertField(FieldType.FieldMergeField, true);
    mergeField.FieldName = "MergeField";

    // If we perform a mail merge programmatically, we can use a custom prompt respondent
    // to automatically edit responses for FILLIN fields that the mail merge encounters.
    doc.FieldOptions.UserPromptRespondent = new PromptRespondent();
    doc.MailMerge.Execute(new [] { "MergeField" }, new object[] { "" });

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

/// <summary>
/// Prepends a line to the default response of every FILLIN field during a mail merge.
/// </summary>
private class PromptRespondent : IFieldUserPromptRespondent
    public string Respond(string promptText, string defaultResponse)
        return "Response modified by PromptRespondent. " + defaultResponse;

See Also