FieldAsk class

Implements the ASK field.

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

public class FieldAsk : Field


FieldAsk()The default constructor.


BookmarkName { get; set; }Gets or sets the name of the bookmark.
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 information and assigns a bookmark to represent the user’s response.


Shows how to create an ASK field, and set its properties.

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

    // Place a field where the response to our ASK field will be placed.
    FieldRef fieldRef = (FieldRef)builder.InsertField(FieldType.FieldRef, true);
    fieldRef.BookmarkName = "MyAskField";

    Assert.AreEqual(" REF  MyAskField", fieldRef.GetFieldCode());

    // Insert the ASK field and edit its properties to reference our REF field by bookmark name.
    FieldAsk fieldAsk = (FieldAsk)builder.InsertField(FieldType.FieldAsk, true);
    fieldAsk.BookmarkName = "MyAskField";
    fieldAsk.PromptText = "Please provide a response for this ASK field";
    fieldAsk.DefaultResponse = "Response from within the field.";
    fieldAsk.PromptOnceOnMailMerge = true;

        " ASK  MyAskField \"Please provide a response for this ASK field\" \\d \"Response from within the field.\" \\o",

    // ASK fields apply the default response to their respective REF fields during a mail merge.
    DataTable table = new DataTable("My Table");
    table.Columns.Add("Column 1");
    table.Rows.Add("Row 1");
    table.Rows.Add("Row 2");

    FieldMergeField fieldMergeField = (FieldMergeField)builder.InsertField(FieldType.FieldMergeField, true);
    fieldMergeField.FieldName = "Column 1";

    // We can modify or override the default response in our ASK fields with a custom prompt responder,
    // which will occur during a mail merge.
    doc.FieldOptions.UserPromptRespondent = new MyPromptRespondent();

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

/// <summary>
/// Prepends text to the default response of an ASK field during a mail merge.
/// </summary>
private class MyPromptRespondent : IFieldUserPromptRespondent
    public string Respond(string promptText, string defaultResponse)
        return "Response from MyPromptRespondent. " + defaultResponse;

See Also