Crear AcroForm - Crear PDF Rellenable en C#

El siguiente fragmento de código también funciona con la biblioteca Aspose.PDF.Drawing.

Crear formulario desde cero

Agregar campo de formulario en un documento PDF

La clase Document proporciona una colección llamada Form que te ayuda a gestionar campos de formulario en un documento PDF.

Para agregar un campo de formulario:

1. Crea el campo de formulario que deseas agregar.
2. Llama al método Add de la colección Form.

Agregando TextBoxField

El siguiente ejemplo muestra cómo agregar un TextBoxField.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddTextBoxFieldToPdf()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Open PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "TextField.pdf"))
    {
        // Create a field
        var textBoxField = new Aspose.Pdf.Forms.TextBoxField(document.Pages[1], new Aspose.Pdf.Rectangle(100, 200, 300, 300));
        textBoxField.PartialName = "textbox1";
        textBoxField.Value = "Text Box";

        // Configure border
        var border = new Aspose.Pdf.Annotations.Border(textBoxField);
        border.Width = 5;
        border.Dash = new Aspose.Pdf.Annotations.Dash(1, 1);
        textBoxField.Border = border;

        // Set color
        textBoxField.Color = Aspose.Pdf.Color.FromRgb(System.Drawing.Color.Green);

        // Add field to the document
        document.Form.Add(textBoxField, 1);

        // Save PDF document
        document.Save(dataDir + "TextBox_out.pdf");
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddTextBoxFieldToPdf()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Open PDF document
    using var document = new Aspose.Pdf.Document(dataDir + "TextField.pdf");

    // Create a field
    var textBoxField = new Aspose.Pdf.Forms.TextBoxField(document.Pages[1], new Aspose.Pdf.Rectangle(100, 200, 300, 300));
    textBoxField.PartialName = "textbox1";
    textBoxField.Value = "Text Box";

    // Configure border
    var border = new Aspose.Pdf.Annotations.Border(textBoxField);
    border.Width = 5;
    border.Dash = new Aspose.Pdf.Annotations.Dash(1, 1);
    textBoxField.Border = border;

    // Set color
    textBoxField.Color = Aspose.Pdf.Color.FromRgb(System.Drawing.Color.Green);

    // Add field to the document
    document.Form.Add(textBoxField, 1);

    // Save PDF document
    document.Save(dataDir + "TextBox_out.pdf");
}

Agregando RadioButtonField

Los siguientes fragmentos de código muestran cómo agregar RadioButtonField en un documento PDF.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddRadioButtonToPdf()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Create PDF document
    using (var document = new Aspose.Pdf.Document())
    {
        // Add page to PDF file
        document.Pages.Add();

        // Instantiate RadioButtonField object with page number as argument
        var radio = new Aspose.Pdf.Forms.RadioButtonField(document.Pages[1]);

        // Add first radio button option and also specify its origin using Rectangle object
        radio.AddOption("Test", new Aspose.Pdf.Rectangle(0, 0, 20, 20));

        // Add second radio button option
        radio.AddOption("Test1", new Aspose.Pdf.Rectangle(20, 20, 40, 40));

        // Add radio button to form object of Document object
        document.Form.Add(radio);

        // Save PDF document
        document.Save(dataDir + "RadioButton_out.pdf");
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddRadioButtonToPdf()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Create PDF document
    using var document = new Aspose.Pdf.Document();

    // Add page to PDF file
    document.Pages.Add();

    // Instantiate RadioButtonField object with page number as argument
    var radio = new Aspose.Pdf.Forms.RadioButtonField(document.Pages[1]);

    // Add first radio button option and also specify its origin using Rectangle object
    radio.AddOption("Test", new Aspose.Pdf.Rectangle(0, 0, 20, 20));

    // Add second radio button option
    radio.AddOption("Test1", new Aspose.Pdf.Rectangle(20, 20, 40, 40));

    // Add radio button to form object of Document object
    document.Form.Add(radio);

    // Save PDF document
    document.Save(dataDir + "RadioButton_out.pdf");
}

TextBoxField se puede agregar con algunas anotaciones de widget.

.NET Core 3.1

// For complete examples and data files, please visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddTextBoxFieldToPdf()
{
    // The path to the documents directory
    string dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Create PDF document
    using (var document = new Aspose.Pdf.Document())
    {
        // Add page to PDF file
        var page = document.Pages.Add();

        // Defining an array with rectangle data for widget annotations. 
        // The number of elements in the array determines the number of widget annotations to add.
        var rects = new Aspose.Pdf.Rectangle[]
        {
            new Aspose.Pdf.Rectangle(10, 600, 110, 620),
            new Aspose.Pdf.Rectangle(10, 630, 110, 650),
            new Aspose.Pdf.Rectangle(10, 660, 110, 680)
        };

        // Defining an array with DefaultAppearance used to specify how widget annotations are displayed in the added field.
        var defaultAppearances = new Aspose.Pdf.Annotations.DefaultAppearance[]
        {
            new Aspose.Pdf.Annotations.DefaultAppearance("Arial", 10, System.Drawing.Color.DarkBlue),
            new Aspose.Pdf.Annotations.DefaultAppearance("Helvetica", 12, System.Drawing.Color.DarkGreen),
            new Aspose.Pdf.Annotations.DefaultAppearance(Aspose.Pdf.Text.FontRepository.FindFont("TimesNewRoman"), 14, System.Drawing.Color.DarkMagenta)
        };

        // Create a field
        var textBoxField = new Aspose.Pdf.Forms.TextBoxField(page, rects);

        // Setting the appearances of widget annotations
        short i = 0;
        foreach (Aspose.Pdf.Annotations.WidgetAnnotation wa in textBoxField)
        {
            wa.DefaultAppearance = defaultAppearances[i++];
        }
        textBoxField.Value = "Text";

        // Add field to the document
        document.Form.Add(textBoxField);

        // Save PDF document
        document.Save(dataDir + "TextBox_out.pdf");
    }
}

.NET 8

// For complete examples and data files, please visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddTextBoxFieldToPdf()
{
    // The path to the documents directory
    string dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Create PDF document
    using var document = new Aspose.Pdf.Document();

    // Add page to PDF file
    var page = document.Pages.Add();

    // Defining an array with rectangle data for widget annotations. 
    // The number of elements in the array determines the number of widget annotations to add.
    var rects = new Aspose.Pdf.Rectangle[]
    {
        new Aspose.Pdf.Rectangle(10, 600, 110, 620),
        new Aspose.Pdf.Rectangle(10, 630, 110, 650),
        new Aspose.Pdf.Rectangle(10, 660, 110, 680)
    };

    // Defining an array with DefaultAppearance used to specify how widget annotations are displayed in the added field.
    var defaultAppearances = new Aspose.Pdf.Annotations.DefaultAppearance[]
    {
        new Aspose.Pdf.Annotations.DefaultAppearance("Arial", 10, System.Drawing.Color.DarkBlue),
        new Aspose.Pdf.Annotations.DefaultAppearance("Helvetica", 12, System.Drawing.Color.DarkGreen),
        new Aspose.Pdf.Annotations.DefaultAppearance(Aspose.Pdf.Text.FontRepository.FindFont("TimesNewRoman"), 14, System.Drawing.Color.DarkMagenta)
    };

    // Create a field
    var textBoxField = new Aspose.Pdf.Forms.TextBoxField(page, rects);

    // Setting the appearances of widget annotations
    short i = 0;
    foreach (Aspose.Pdf.Annotations.WidgetAnnotation wa in textBoxField)
    {
        wa.DefaultAppearance = defaultAppearances[i++];
    }
    textBoxField.Value = "Text";

    // Add field to the document
    document.Form.Add(textBoxField);

    // Save PDF document
    document.Save(dataDir + "TextBox_out.pdf");
}

El siguiente fragmento de código muestra los pasos para agregar RadioButtonField con tres opciones y colocarlos dentro de celdas de tabla.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddRadioButtonWithOptionsToPdf()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Create PDF document
    using (var document = new Aspose.Pdf.Document())
    {
        // Add page to PDF file
        var page = document.Pages.Add();

        // Create a table
        var table = new Aspose.Pdf.Table();
        table.ColumnWidths = "120 120 120";
        page.Paragraphs.Add(table);

        // Add a row to the table
        var r1 = table.Rows.Add();

        // Add cells to the row
        var c1 = r1.Cells.Add();
        var c2 = r1.Cells.Add();
        var c3 = r1.Cells.Add();

        // Create a RadioButtonField
        var rf = new Aspose.Pdf.Forms.RadioButtonField(page);
        rf.PartialName = "radio";
        document.Form.Add(rf, 1);

        // Create RadioButtonOptionField options
        var opt1 = new Aspose.Pdf.Forms.RadioButtonOptionField();
        var opt2 = new Aspose.Pdf.Forms.RadioButtonOptionField();
        var opt3 = new Aspose.Pdf.Forms.RadioButtonOptionField();

        opt1.OptionName = "Item1";
        opt2.OptionName = "Item2";
        opt3.OptionName = "Item3";

        opt1.Width = 15;
        opt1.Height = 15;
        opt2.Width = 15;
        opt2.Height = 15;
        opt3.Width = 15;
        opt3.Height = 15;

        rf.Add(opt1);
        rf.Add(opt2);
        rf.Add(opt3);

        // Configure borders and captions for options
        opt1.Border = new Aspose.Pdf.Annotations.Border(opt1);
        opt1.Border.Width = 1;
        opt1.Border.Style = Aspose.Pdf.Annotations.BorderStyle.Solid;
        opt1.Characteristics.Border = System.Drawing.Color.Black;
        opt1.DefaultAppearance.TextColor = System.Drawing.Color.Red;
        opt1.Caption = new Aspose.Pdf.Text.TextFragment("Item1");

        opt2.Border = new Aspose.Pdf.Annotations.Border(opt2);
        opt2.Border.Width = 1;
        opt2.Border.Style = Aspose.Pdf.Annotations.BorderStyle.Solid;
        opt2.Characteristics.Border = System.Drawing.Color.Black;
        opt2.DefaultAppearance.TextColor = System.Drawing.Color.Red;
        opt2.Caption = new Aspose.Pdf.Text.TextFragment("Item2");

        opt3.Border = new Aspose.Pdf.Annotations.Border(opt3);
        opt3.Border.Width = 1;
        opt3.Border.Style = Aspose.Pdf.Annotations.BorderStyle.Solid;
        opt3.Characteristics.Border = System.Drawing.Color.Black;
        opt3.DefaultAppearance.TextColor = System.Drawing.Color.Red;
        opt3.Caption = new Aspose.Pdf.Text.TextFragment("Item3");

        // Add options to the cells
        c1.Paragraphs.Add(opt1);
        c2.Paragraphs.Add(opt2);
        c3.Paragraphs.Add(opt3);

        // Save PDF document
        document.Save(dataDir + "RadioButtonWithOptions_out.pdf");
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddRadioButtonWithOptionsToPdf()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Create PDF document
    using var document = new Aspose.Pdf.Document();

    // Add page to PDF file
    var page = document.Pages.Add();

    // Create a table
    var table = new Aspose.Pdf.Table();
    table.ColumnWidths = "120 120 120";
    page.Paragraphs.Add(table);

    // Add a row to the table
    var r1 = table.Rows.Add();

    // Add cells to the row
    var c1 = r1.Cells.Add();
    var c2 = r1.Cells.Add();
    var c3 = r1.Cells.Add();

    // Create a RadioButtonField
    var rf = new Aspose.Pdf.Forms.RadioButtonField(page);
    rf.PartialName = "radio";
    document.Form.Add(rf, 1);

    // Create RadioButtonOptionField options
    var opt1 = new Aspose.Pdf.Forms.RadioButtonOptionField();
    var opt2 = new Aspose.Pdf.Forms.RadioButtonOptionField();
    var opt3 = new Aspose.Pdf.Forms.RadioButtonOptionField();

    opt1.OptionName = "Item1";
    opt2.OptionName = "Item2";
    opt3.OptionName = "Item3";

    opt1.Width = 15;
    opt1.Height = 15;
    opt2.Width = 15;
    opt2.Height = 15;
    opt3.Width = 15;
    opt3.Height = 15;

    rf.Add(opt1);
    rf.Add(opt2);
    rf.Add(opt3);

    // Configure borders and captions for options
    opt1.Border = new Aspose.Pdf.Annotations.Border(opt1);
    opt1.Border.Width = 1;
    opt1.Border.Style = Aspose.Pdf.Annotations.BorderStyle.Solid;
    opt1.Characteristics.Border = System.Drawing.Color.Black;
    opt1.DefaultAppearance.TextColor = System.Drawing.Color.Red;
    opt1.Caption = new Aspose.Pdf.Text.TextFragment("Item1");

    opt2.Border = new Aspose.Pdf.Annotations.Border(opt2);
    opt2.Border.Width = 1;
    opt2.Border.Style = Aspose.Pdf.Annotations.BorderStyle.Solid;
    opt2.Characteristics.Border = System.Drawing.Color.Black;
    opt2.DefaultAppearance.TextColor = System.Drawing.Color.Red;
    opt2.Caption = new Aspose.Pdf.Text.TextFragment("Item2");

    opt3.Border = new Aspose.Pdf.Annotations.Border(opt3);
    opt3.Border.Width = 1;
    opt3.Border.Style = Aspose.Pdf.Annotations.BorderStyle.Solid;
    opt3.Characteristics.Border = System.Drawing.Color.Black;
    opt3.DefaultAppearance.TextColor = System.Drawing.Color.Red;
    opt3.Caption = new Aspose.Pdf.Text.TextFragment("Item3");

    // Add options to the cells
    c1.Paragraphs.Add(opt1);
    c2.Paragraphs.Add(opt2);
    c3.Paragraphs.Add(opt3);

    // Save PDF document
    document.Save(dataDir + "RadioButtonWithOptions_out.pdf");
}

Agregando título a RadioButtonField

El siguiente fragmento de código muestra cómo agregar un título que estará asociado con RadioButtonField:

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddingCaptionToRadioButtonField()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Load source PDF form
    using (var form = new Aspose.Pdf.Facades.Form(dataDir + "RadioButtonField.pdf"))
    {
        using (var document = new Aspose.Pdf.Document(dataDir + "RadioButtonField.pdf"))
        {
            foreach (var item in form.FieldNames)
            {
                Console.WriteLine(item.ToString());
                var radioOptions = form.GetButtonOptionValues(item);

                if (item.Contains("radio1"))
                {
                    var field1 = document.Form[item] as Aspose.Pdf.Forms.RadioButtonField;
                    var fieldoption = new Aspose.Pdf.Forms.RadioButtonOptionField();
                    fieldoption.OptionName = "Yes";
                    fieldoption.PartialName = "Yesname";

                    var updatedFragment = new Aspose.Pdf.Text.TextFragment("test123");
                    updatedFragment.TextState.Font = Aspose.Pdf.Text.FontRepository.FindFont("Arial");
                    updatedFragment.TextState.FontSize = 10;
                    updatedFragment.TextState.LineSpacing = 6.32f;

                    // Create TextParagraph object
                    var par = new Aspose.Pdf.Text.TextParagraph();

                    // Set paragraph position
                    par.Position = new Aspose.Pdf.Text.Position(field1.Rect.LLX, field1.Rect.LLY + updatedFragment.TextState.FontSize);
                    // Specify word wraping mode
                    par.FormattingOptions.WrapMode = Aspose.Pdf.Text.TextFormattingOptions.WordWrapMode.ByWords;

                    // Add new TextFragment to paragraph
                    par.AppendLine(updatedFragment);

                    // Add the TextParagraph using TextBuilder
                    var textBuilder = new Aspose.Pdf.Text.TextBuilder(document.Pages[1]);
                    textBuilder.AppendParagraph(par);

                    field1.DeleteOption("item1");
                }
            }

            // Save PDF document
            document.Save(dataDir + "RadioButtonField_out.pdf");
        }
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddingCaptionToRadioButtonField()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Load source PDF form
    using var form = new Aspose.Pdf.Facades.Form(dataDir + "RadioButtonField.pdf");
    using var document = new Aspose.Pdf.Document(dataDir + "RadioButtonField.pdf");

    foreach (var item in form.FieldNames)
    {
        Console.WriteLine(item.ToString());
        var radioOptions = form.GetButtonOptionValues(item);

        if (item.Contains("radio1"))
        {
            var field1 = document.Form[item] as Aspose.Pdf.Forms.RadioButtonField;
            var fieldoption = new Aspose.Pdf.Forms.RadioButtonOptionField();
            fieldoption.OptionName = "Yes";
            fieldoption.PartialName = "Yesname";

            var updatedFragment = new Aspose.Pdf.Text.TextFragment("test123");
            updatedFragment.TextState.Font = Aspose.Pdf.Text.FontRepository.FindFont("Arial");
            updatedFragment.TextState.FontSize = 10;
            updatedFragment.TextState.LineSpacing = 6.32f;

            // Create TextParagraph object
            var par = new Aspose.Pdf.Text.TextParagraph();

            // Set paragraph position
            par.Position = new Aspose.Pdf.Text.Position(field1.Rect.LLX, field1.Rect.LLY + updatedFragment.TextState.FontSize);
            // Specify word wraping mode
            par.FormattingOptions.WrapMode = Aspose.Pdf.Text.TextFormattingOptions.WordWrapMode.ByWords;

            // Add new TextFragment to paragraph
            par.AppendLine(updatedFragment);

            // Add the TextParagraph using TextBuilder
            var textBuilder = new Aspose.Pdf.Text.TextBuilder(document.Pages[1]);
            textBuilder.AppendParagraph(par);

            field1.DeleteOption("item1");
        }
    }

    // Save PDF document
    document.Save(dataDir + "RadioButtonField_out.pdf");
}

Otra variante para agregar casillas de verificación agrupadas

Los siguientes fragmentos de código muestran cómo agregar campos de casillas de verificación agrupadas en un documento PDF.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddGroupedCheckBoxFieldsToPdf()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Create PDF document
    using (var document = new Aspose.Pdf.Document())
    {
        // Add page to PDF file
        var page = document.Pages.Add();

        var radioButtonField = new Aspose.Pdf.Forms.RadioButtonField(page);

        // Add radio button options and specify its position using Rectangle
        var opt1 = new Aspose.Pdf.Forms.RadioButtonOptionField(page, new Aspose.Pdf.Rectangle(50, 500, 70, 520));
        var opt2 = new Aspose.Pdf.Forms.RadioButtonOptionField(page, new Aspose.Pdf.Rectangle(100, 500, 120, 520));

        // Set option names for identification
        opt1.OptionName = "Option1";
        opt2.OptionName = "Option2";

        // Set the style of the radio buttons
        opt1.Style = Aspose.Pdf.Forms.BoxStyle.Square;
        opt2.Style = Aspose.Pdf.Forms.BoxStyle.Cross;

        // Configure the border of the first radio button
        opt1.Border = new Aspose.Pdf.Annotations.Border(opt1);
        opt1.Border.Style = Aspose.Pdf.Annotations.BorderStyle.Dashed;
        opt1.Border.Width = 1;
        opt1.Characteristics.Border = System.Drawing.Color.Blue;

        // Configure the border of the second radio button
        opt2.Border = new Aspose.Pdf.Annotations.Border(opt2);
        opt2.Border.Style = Aspose.Pdf.Annotations.BorderStyle.Solid;
        opt2.Border.Width = 1;
        opt2.Characteristics.Border = System.Drawing.Color.Black;

        radioButtonField.Add(opt1);
        radioButtonField.Add(opt2);

        // Add radio button field to the form object of the document
        document.Form.Add(radioButtonField);

        // Save PDF document
        document.Save(dataDir + "GroupedCheckboxFields_out.pdf");
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddGroupedCheckBoxFieldsToPdf()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Create PDF document
    using var document = new Aspose.Pdf.Document();

    // Add page to PDF file
    var page = document.Pages.Add();

    var radioButtonField = new Aspose.Pdf.Forms.RadioButtonField(page);

    // Add radio button options and specify its position using Rectangle
    var opt1 = new Aspose.Pdf.Forms.RadioButtonOptionField(page, new Aspose.Pdf.Rectangle(50, 500, 70, 520));
    var opt2 = new Aspose.Pdf.Forms.RadioButtonOptionField(page, new Aspose.Pdf.Rectangle(100, 500, 120, 520));

    // Set option names for identification
    opt1.OptionName = "Option1";
    opt2.OptionName = "Option2";

    // Set the style of the radio buttons
    opt1.Style = Aspose.Pdf.Forms.BoxStyle.Square;
    opt2.Style = Aspose.Pdf.Forms.BoxStyle.Cross;

    // Configure the border of the first radio button
    opt1.Border = new Aspose.Pdf.Annotations.Border(opt1);
    opt1.Border.Style = Aspose.Pdf.Annotations.BorderStyle.Dashed;
    opt1.Border.Width = 1;
    opt1.Characteristics.Border = System.Drawing.Color.Blue;

    // Configure the border of the second radio button
    opt2.Border = new Aspose.Pdf.Annotations.Border(opt2);
    opt2.Border.Style = Aspose.Pdf.Annotations.BorderStyle.Solid;
    opt2.Border.Width = 1;
    opt2.Characteristics.Border = System.Drawing.Color.Black;

    radioButtonField.Add(opt1);
    radioButtonField.Add(opt2);

    // Add radio button field to the form object of the document
    document.Form.Add(radioButtonField);

    // Save PDF document
    document.Save(dataDir + "GroupedCheckboxFields_out.pdf");
}

Agregando campo ComboBox

Los siguientes fragmentos de código muestran cómo agregar un campo ComboBox en un documento PDF.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddComboBoxToPdf()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Create PDF document
    using (var document = new Aspose.Pdf.Document())
    {
        // Add page to PDF file
        document.Pages.Add();

        // Instantiate ComboBox Field object
        var combo = new Aspose.Pdf.Forms.ComboBoxField(document.Pages[1], new Aspose.Pdf.Rectangle(100, 600, 150, 616));

        // Add options to ComboBox
        combo.AddOption("Red");
        combo.AddOption("Yellow");
        combo.AddOption("Green");
        combo.AddOption("Blue");

        // Add combo box object to form fields collection of document object
        document.Form.Add(combo);

        // Save PDF document
        document.Save(dataDir + "ComboBox_out.pdf");
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddComboBoxToPdf()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Create PDF document
    using var document = new Aspose.Pdf.Document();

    // Add page to PDF file
    document.Pages.Add();

    // Instantiate ComboBox Field object
    var combo = new Aspose.Pdf.Forms.ComboBoxField(document.Pages[1], new Aspose.Pdf.Rectangle(100, 600, 150, 616));

    // Add options to ComboBox
    combo.AddOption("Red");
    combo.AddOption("Yellow");
    combo.AddOption("Green");
    combo.AddOption("Blue");

    // Add combo box object to form fields collection of document object
    document.Form.Add(combo);

    // Save PDF document
    document.Save(dataDir + "ComboBox_out.pdf");
}

Agregando CheckboxField

El siguiente fragmento de código muestra cómo agregar CheckboxField en un documento PDF.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddCheckBoxFieldToPdf()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Create PDF document
    using (var document = new Aspose.Pdf.Document())
    {
        // Add page to PDF file
        var page = document.Pages.Add();

        // Create a field
        var checkboxField = new Aspose.Pdf.Forms.CheckboxField(page, new Aspose.Pdf.Rectangle(50, 620, 100, 650));
        checkboxField.Characteristics.Background = System.Drawing.Color.Aqua;
        checkboxField.Style = Aspose.Pdf.Forms.BoxStyle.Circle;

        // Add field to the form
        document.Form.Add(checkboxField);

        // Save PDF document
        document.Save(dataDir + "CheckboxField_out.pdf");
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddCheckBoxFieldToPdf()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Create PDF document
    using var document = new Aspose.Pdf.Document();

    // Add page to PDF file
    var page = document.Pages.Add();

    // Create a field
    var checkboxField = new Aspose.Pdf.Forms.CheckboxField(page, new Aspose.Pdf.Rectangle(50, 620, 100, 650));
    checkboxField.Characteristics.Background = System.Drawing.Color.Aqua;
    checkboxField.Style = Aspose.Pdf.Forms.BoxStyle.Circle;

    // Add field to the form
    document.Form.Add(checkboxField);

    // Save PDF document
    document.Save(dataDir + "CheckboxField_out.pdf");
}

Agregando ListBoxField

El siguiente fragmento de código muestra cómo agregar ListBoxField en un documento PDF.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddListBoxFieldToPdf()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Create PDF document
    using (var document = new Aspose.Pdf.Document())
    {
        // Add page to PDF file
        var page = document.Pages.Add();

        // Create a field
        var listBoxField = new Aspose.Pdf.Forms.ListBoxField(page, new Aspose.Pdf.Rectangle(50, 650, 100, 700));
        listBoxField.PartialName = "list";
        listBoxField.AddOption("Red");
        listBoxField.AddOption("Green");
        listBoxField.AddOption("Blue");
        // Add field to the form
        document.Form.Add(listBoxField);

        // Save PDF document
        document.Save(dataDir + "ListBoxField_out.pdf");
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddListBoxFieldToPdf()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Create PDF document
    using var document = new Aspose.Pdf.Document();

    // Add page to PDF file
    var page = document.Pages.Add();

    // Create a field
    var listBoxField = new Aspose.Pdf.Forms.ListBoxField(page, new Aspose.Pdf.Rectangle(50, 650, 100, 700));
    listBoxField.PartialName = "list";
    listBoxField.AddOption("Red");
    listBoxField.AddOption("Green");
    listBoxField.AddOption("Blue");
    // Add field to the form
    document.Form.Add(listBoxField);

    // Save PDF document
    document.Save(dataDir + "ListBoxField_out.pdf");
}

Usando SignatureField

El siguiente fragmento de código muestra cómo firmar un documento PDF mediante SignatureField.

.NET Core 3.1

private static void SignPdfBySignatureField()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Create PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "TextField.pdf"))
    {
        // Add page to PDF file	
        var page = document.Pages.Add();

        // Create a field
        var signatureField = new Aspose.Pdf.Forms.SignatureField(page, new Aspose.Pdf.Rectangle(100, 700, 200, 800));
        document.Form.Add(signatureField);

        var pkcs = new Aspose.Pdf.Forms.PKCS7("test1.pfx", "test1");
        pkcs.Date = new DateTime();
        pkcs.ContactInfo = "Test";
        pkcs.Location = "TestLocation";
        pkcs.Reason = "Verify";
        pkcs.ShowProperties = false;
        signatureField.Sign(pkcs);

        // Save PDF document
        document.Save(dataDir + "SignatureField_out.pdf");
    }
}

.NET 8

private static void SignPdfBySignatureField()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Create PDF document
    using var document = new Aspose.Pdf.Document(dataDir + "TextField.pdf");

    // Add page to PDF file
    var page = document.Pages.Add();

    // Create a field
    var signatureField = new Aspose.Pdf.Forms.SignatureField(page, new Aspose.Pdf.Rectangle(100, 700, 200, 800));
    document.Form.Add(signatureField);

    var pkcs = new Aspose.Pdf.Forms.PKCS7("test1.pfx", "test1");
    pkcs.Date = new DateTime();
    pkcs.ContactInfo = "Test";
    pkcs.Location = "TestLocation";
    pkcs.Reason = "Verify";
    pkcs.ShowProperties = false;
    signatureField.Sign(pkcs);

    // Save PDF document
    document.Save(dataDir + "SignatureField_out.pdf");
}

Agregar Tooltip a Campo de Formulario

La clase Document proporciona una colección llamada Form que gestiona campos de formulario en un documento PDF. Para agregar un tooltip a un campo de formulario, utiliza la clase Field AlternateName. Adobe Acrobat utiliza el ’nombre alternativo’ como un tooltip de campo.

Los fragmentos de código que siguen muestran cómo agregar un tooltip a un campo de formulario, primero usando C# y luego Visual Basic.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddTooltipToField()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Open PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "AddTooltipToField.pdf"))
    {
        // Set the tooltip for textfield
        if (document.Form["textbox1"] is Aspose.Pdf.Forms.Field field)
        {
            field.AlternateName = "Text box tool tip";
        }

        // Save PDF document
        document.Save(dataDir + "AddTooltipToField_out.pdf");
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddTooltipToField()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Open PDF document
    using var document = new Aspose.Pdf.Document(dataDir + "AddTooltipToField.pdf");

    // Set the tooltip for textfield
    if (document.Form["textbox1"] is Aspose.Pdf.Forms.Field field)
    {
        field.AlternateName = "Text box tool tip";
    }

    // Save PDF document
    document.Save(dataDir + "AddTooltipToField_out.pdf");
}