FormField.TextInputFormat property

Returns or sets the text formatting for a text form field.

public string TextInputFormat { get; set; }


If the text form field contains regular text, then valid format strings are “”, “UPPERCASE”, “LOWERCASE”, “FIRST CAPITAL” and “TITLE CASE”. The strings are case-insensitive.

If the text form field contains a number or a date/time value, then valid format strings are number or date and time format strings.

Microsoft Word allows strings with at most 64 characters.


Shows how insert different kinds of form fields into a document, and process them with using a document visitor implementation.

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

    // Use a document builder to insert a combo box.
    builder.Write("Choose a value from this combo box: ");
    FormField comboBox = builder.InsertComboBox("MyComboBox", new[] { "One", "Two", "Three" }, 0);
    comboBox.CalculateOnExit = true;
    Assert.AreEqual(3, comboBox.DropDownItems.Count);
    Assert.AreEqual(0, comboBox.DropDownSelectedIndex);


    // Use a document builder to insert a check box.
    builder.Write("Click this check box to tick/untick it: ");
    FormField checkBox = builder.InsertCheckBox("MyCheckBox", false, 50);
    checkBox.IsCheckBoxExactSize = true;
    checkBox.HelpText = "Right click to check this box";
    checkBox.OwnHelp = true;
    checkBox.StatusText = "Checkbox status text";
    checkBox.OwnStatus = true;
    Assert.AreEqual(50.0d, checkBox.CheckBoxSize);


    // Use a document builder to insert text input form field.
    builder.Write("Enter text here: ");
    FormField textInput = builder.InsertTextInput("MyTextInput", TextFormFieldType.Regular, "", "Placeholder text", 50);
    textInput.EntryMacro = "EntryMacro";
    textInput.ExitMacro = "ExitMacro";
    textInput.TextInputDefault = "Regular";
    textInput.TextInputFormat = "FIRST CAPITAL";
    textInput.SetTextInputValue("New placeholder text");
    Assert.AreEqual(TextFormFieldType.Regular, textInput.TextInputType);
    Assert.AreEqual(50, textInput.MaxLength);

    // This collection contains all our form fields.
    FormFieldCollection formFields = doc.Range.FormFields;
    Assert.AreEqual(3, formFields.Count);

    // Fields display our form fields. We can see their field codes by opening this document
    // in Microsoft and pressing Alt + F9. These fields have no switches,
    // and members of the FormField object fully govern their form fields' content.
    Assert.AreEqual(3, doc.Range.Fields.Count);
    Assert.AreEqual(" FORMDROPDOWN \u0001", doc.Range.Fields[0].GetFieldCode());
    Assert.AreEqual(" FORMCHECKBOX \u0001", doc.Range.Fields[1].GetFieldCode());
    Assert.AreEqual(" FORMTEXT \u0001", doc.Range.Fields[2].GetFieldCode());

    // Allow each form field to accept a document visitor.
    FormFieldVisitor formFieldVisitor = new FormFieldVisitor();

    using (IEnumerator<FormField> fieldEnumerator = formFields.GetEnumerator())
        while (fieldEnumerator.MoveNext())


    doc.Save(ArtifactsDir + "FormFields.Visitor.html");

/// <summary>
/// Visitor implementation that prints details of form fields that it visits. 
/// </summary>
public class FormFieldVisitor : DocumentVisitor
    public FormFieldVisitor()
        mBuilder = new StringBuilder();

    /// <summary>
    /// Called when a FormField node is encountered in the document.
    /// </summary>
    public override VisitorAction VisitFormField(FormField formField)
        AppendLine(formField.Type + ": \"" + formField.Name + "\"");
        AppendLine("\tStatus: " + (formField.Enabled ? "Enabled" : "Disabled"));
        AppendLine("\tHelp Text:  " + formField.HelpText);
        AppendLine("\tEntry macro name: " + formField.EntryMacro);
        AppendLine("\tExit macro name: " + formField.ExitMacro);

        switch (formField.Type)
            case FieldType.FieldFormDropDown:
                AppendLine("\tDrop-down items count: " + formField.DropDownItems.Count + ", default selected item index: " + formField.DropDownSelectedIndex);
                AppendLine("\tDrop-down items: " + string.Join(", ", formField.DropDownItems.ToArray()));
            case FieldType.FieldFormCheckBox:
                AppendLine("\tCheckbox size: " + formField.CheckBoxSize);
                AppendLine("\t" + "Checkbox is currently: " + (formField.Checked ? "checked, " : "unchecked, ") + "by default: " + (formField.Default ? "checked" : "unchecked"));
            case FieldType.FieldFormTextInput:
                AppendLine("\tInput format: " + formField.TextInputFormat);
                AppendLine("\tCurrent contents: " + formField.Result);

        // Let the visitor continue visiting other nodes.
        return VisitorAction.Continue;

    /// <summary>
    /// Adds newline char-terminated text to the current output.
    /// </summary>
    private void AppendLine(string text)
        mBuilder.Append(text + '\n');

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

    private readonly StringBuilder mBuilder;

See Also