// Set percent format for TextField.
private static TextField AddPercentFormat(Page p,
    _Rect rect,
    int decimalPlaces,
    TextField.NumberSeparatorStyle separatorStyle)
{
    TextField result = new TextField();
    p.Doc.AcroForm.Fields.Add(result);

    result.Widget.Page = p;
    result.Widget.Rect = rect;
    result.Widget.Border.Width = 1;
    result.SetPercentFormat(decimalPlaces, separatorStyle);

    return result;
}

// Set number format for CombTextField.
private static CombTextField AddNumberFormat(Page p,
    _Rect rect,
    int decimalPlaces,
    CombTextField.NumberSeparatorStyle separatorStyle,
    CombTextField.NumberNegativeStyle negativeStyle,
    string currencySymbol,
    CombTextField.CurrencySymbolStyle currencySymbolStyle)
{
    CombTextField result = new CombTextField();
    p.Doc.AcroForm.Fields.Add(result);

    result.Widget.Page = p;
    result.Widget.Rect = rect;
    result.Widget.Border.Width = 1;
    result.SetNumberFormat(decimalPlaces, separatorStyle, negativeStyle, currencySymbol, currencySymbolStyle);

    return result;
}

// Set date format for TextField.
private static TextField AddDateFormat(Page p,
    _Rect rect,
    DateTime v,
    string format)
{
    TextField result = new TextField();
    p.Doc.AcroForm.Fields.Add(result);

    result.Widget.Page = p;
    result.Widget.Rect = rect;
    result.Widget.Border.Width = 1;
    result.SetDateValue(v, format);

    return result;
}

// Set time format for ComboBoxField.
private static ComboBoxField AddTimeFormat(Page p,
    _Rect rect,
    DateTime v,
    string format)
{
    ComboBoxField result = new ComboBoxField();
    p.Doc.AcroForm.Fields.Add(result);

    result.Widget.Page = p;
    result.Widget.Rect = rect;
    result.Widget.Border.Width = 1;
    result.SetTimeValue(v, format);

    return result;
}

// Set special format for TextField.
private static TextField AddSpecialFormat(Page p,
    _Rect rect,
    string v,
    TextField.SpecialFormat format)
{
    TextField result = new TextField();
    p.Doc.AcroForm.Fields.Add(result);

    result.Widget.Page = p;
    result.Widget.Rect = rect;
    result.Widget.Border.Width = 1;
    result.SetSpecialFormatValue(v, format);            

    return result;
}

static void Main(string[] args)
{
    // Initialize GcPdfDocument. 
    GcPdfDocument doc = new GcPdfDocument();

    // Set compression level.
    doc.CompressionLevel = System.IO.Compression.CompressionLevel.NoCompression;

    // Add a blank page to the document.
    var p = doc.NewPage();

    // Initialize GcPdfGraphics.
    var g = p.Graphics;

    // Draw SetPercentFormat string.
    g.DrawString("SetPercentFormat", StandardFonts.Helvetica, 14, Color.Black, new _Point(10, 10));

    // Set percent format for the text fields.
    AddPercentFormat(p, new _Rect(10, 40, 60, 20), 2, TextField.NumberSeparatorStyle.Comma);
    AddPercentFormat(p, new _Rect(80, 40, 60, 20), 0, TextField.NumberSeparatorStyle.CommaDot);
    AddPercentFormat(p, new _Rect(150, 40, 60, 20), 3, TextField.NumberSeparatorStyle.DotComma);
    AddPercentFormat(p, new _Rect(220, 40, 60, 20), 2, TextField.NumberSeparatorStyle.Dot);
    AddPercentFormat(p, new _Rect(290, 40, 60, 20), 2, TextField.NumberSeparatorStyle.ApostropheDot);

    // Draw SetNumberFormat string.
    g.DrawString("SetNumberFormat", StandardFonts.Helvetica, 14, Color.Black, new _Point(10, 70));

    // Set number format for the comb text fields.
    AddNumberFormat(p, new _Rect(10, 100, 60, 20), 2, CombTextField.NumberSeparatorStyle.Comma,
        CombTextField.NumberNegativeStyle.None, null, CombTextField.CurrencySymbolStyle.BeforeWithSpace);
    AddNumberFormat(p, new _Rect(80, 100, 60, 20), 0, CombTextField.NumberSeparatorStyle.CommaDot,
        CombTextField.NumberNegativeStyle.UseRedText, "R", CombTextField.CurrencySymbolStyle.BeforeWithSpace);
    AddNumberFormat(p, new _Rect(150, 100, 60, 20), 3, CombTextField.NumberSeparatorStyle.DotComma,
        CombTextField.NumberNegativeStyle.ShowParentheses, "\u20ac", CombTextField.CurrencySymbolStyle.AfterWithSpace);
    AddNumberFormat(p, new _Rect(220, 100, 60, 20), 2, CombTextField.NumberSeparatorStyle.Dot,
        CombTextField.NumberNegativeStyle.ShowParentheses, "TL", CombTextField.CurrencySymbolStyle.AfterNoSpace);
    AddNumberFormat(p, new _Rect(290, 100, 60, 20), 2, CombTextField.NumberSeparatorStyle.ApostropheDot,
        CombTextField.NumberNegativeStyle.ShowParentheses | CombTextField.NumberNegativeStyle.UseRedText, "TL", CombTextField.CurrencySymbolStyle.AfterWithSpace);

    // Draw SetDateFormat string.
    g.DrawString("SetDateFormat", StandardFonts.Helvetica, 14, Color.Black, new _Point(10, 130));

    // Set date format for the text fields.
    AddDateFormat(p, new _Rect(10, 160, 60, 20), DateTime.Now, "dd-mm-yyyy");
    AddDateFormat(p, new _Rect(80, 160, 60, 20), DateTime.Now, "d-m-yy");
    AddDateFormat(p, new _Rect(150, 160, 60, 20), DateTime.Now, "yyyy/mmmm/dd");

    // Draw SetTimeFormat string.
    g.DrawString("SetTimeFormat", StandardFonts.Helvetica, 14, Color.Black, new _Point(10, 200));

    // Set time format for the combobox fields.
    DateTime dt = new DateTime(2000, 1, 1, 1, 2, 3);
    AddTimeFormat(p, new _Rect(10, 230, 60, 20), dt, "HH:MM");
    AddTimeFormat(p, new _Rect(80, 230, 60, 20), dt, "h:MM tt");
    AddTimeFormat(p, new _Rect(150, 230, 60, 20), dt, "HH:MM:ss");

    // Draw Special Format string.
    g.DrawString("Special Format", StandardFonts.Helvetica, 14, Color.Black, new _Point(10, 270));

    // Set special format for the text fields.
    AddSpecialFormat(p, new _Rect(10, 300, 60, 20), "35004", TextField.SpecialFormat.ZipCode);
    AddSpecialFormat(p, new _Rect(80, 300, 60, 20), "84606-6580", TextField.SpecialFormat.ZipCode4);
    AddSpecialFormat(p, new _Rect(150, 300, 60, 20), "", TextField.SpecialFormat.Phone);
    AddSpecialFormat(p, new _Rect(220, 300, 60, 20), "", TextField.SpecialFormat.SSN);

    // Save the document.
    doc.Save("FieldFormat.pdf");
}

// Initialize GcPdfDocument.
var doc = new GcPdfDocument();
            
// Add new page to the document.
var page = doc.NewPage();

// Initialize GcPdfGraphics.
var g = page.Graphics;

// Set text format.
TextFormat tf = new TextFormat();
tf.Font = StandardFonts.Times;
tf.FontSize = 14;
PointF ip = new PointF(72, 72);
float fldOffset = 72 * 2;
float fldHeight = tf.FontSize * 1.2f;
float dY = 32;

// Add TextField for Percent Format.
g.DrawString("Percent Format", tf, ip);
var fldText1 = new TextField();
            
// Add value to the field.
fldText1.Value = "-0.100";
fldText1.Widget.Page = page;
fldText1.Widget.Rect = new RectangleF(ip.X + fldOffset, ip.Y, 72 * 3, fldHeight);

// Format the value to percent format.
fldText1.Events.FormatValue = new ActionJavaScript("AFPercent_Format(3, 2)");
doc.AcroForm.Fields.Add(fldText1);
ip.Y += dY;

// Add TextField for Number Format.
g.DrawString("Number Format", tf, ip);
var fldText2 = new TextField();

// Add value to the field.
fldText2.Value = "-0.123";
fldText2.Widget.Page = page;
fldText2.Widget.Rect = new RectangleF(ip.X + fldOffset, ip.Y, 72 * 3, fldHeight);

// Format the value to number format.
fldText2.Events.FormatValue = new ActionJavaScript("AFNumber_Format(3, 2, 1, 0, ' €', false)");
doc.AcroForm.Fields.Add(fldText2);
ip.Y += dY;

// Add TextField for Time Format.
g.DrawString("Time Format", tf, ip);
var fldText3 = new TextField();

// Add value to the field.
fldText3.Value = "23:21";
fldText3.Widget.Page = page;
fldText3.Widget.Rect = new RectangleF(ip.X + fldOffset, ip.Y, 72 * 3, fldHeight);

// Format the value to time format.
fldText3.Events.FormatValue = new ActionJavaScript("AFTime_FormatEx('H:MM tt')");
doc.AcroForm.Fields.Add(fldText3);
ip.Y += dY;

// Add TextField for Date Format.
g.DrawString("Date Format", tf, ip);
var fldText4 = new TextField();

// Add value to the field.
fldText4.Value = "27-05-2025";
fldText4.Widget.Page = page;
fldText4.Widget.Rect = new RectangleF(ip.X + fldOffset, ip.Y, 72 * 3, fldHeight);

// Format the value to date format.
fldText4.Events.FormatValue = new ActionJavaScript("AFDate_FormatEx('dd-m-yy')");
doc.AcroForm.Fields.Add(fldText4);
ip.Y += dY;

// Add TextField for Special Format.
g.DrawString("Special Format", tf, ip);
var fldText5 = new TextField();

// Add value to the field.
fldText5.Value = "1234567890";
fldText5.Widget.Page = page;
fldText5.Widget.Rect = new RectangleF(ip.X + fldOffset, ip.Y, 72 * 3, fldHeight);

// Format the value to special format.
fldText5.Events.FormatValue = new ActionJavaScript("AFSpecial_Format(2)");
doc.AcroForm.Fields.Add(fldText5);
ip.Y += dY;

// Save Document
doc.Save("FieldFormatFunctions.pdf");

doc.AcroForm.Fields[0].Value = "Sample Text";

// Delete a particular field
doc.AcroForm.Fields.RemoveAt(0);
        
// Delete all the fields
doc.AcroForm.Fields.Clear();

// Set tab order of form fields to row
page.AnnotationsTabsOrder = AnnotationsTabsOrder.RowOrder;