PdfGraphicsAcroFormRadioGroupField Class

A radio group field in PDF Graphics API.

Namespace: DevExpress.Pdf

Assembly: DevExpress.Pdf.v21.1.Drawing.dll

NuGet Package: DevExpress.Pdf.Drawing

Declaration

C#

public class PdfGraphicsAcroFormRadioGroupField :
    PdfGraphicsAcroFormField

VB.NET

Public Class PdfGraphicsAcroFormRadioGroupField
    Inherits PdfGraphicsAcroFormField

Related API Members

The following members return PdfGraphicsAcroFormRadioGroupField objects:

• PdfGraphicsAcroFormField.CreateRadioGroup(String)

Remarks

Tip

You can use the PdfAcroFormField class to add interactive form fields to a PDF file. Refer to the following article for more information: Interactive Forms in PDF Documents

Create a Form Field

Create a new PdfGraphicsAcroFormRadioGroupField object, and pass a field name and location as constructor parameters. The field location is calculated in the world coordinate system. You can also call the PdfGraphicsAcroFormField.CreateRadioGroup method to crate a radio group field.

To add a button to the radio group field, call the AddButton method.

Specify Form Field Parameters

The following parameters are available:

Parameter	API
Selected item	SelectedIndex
Radio button style	ButtonStyle
Form field name	Name
Tooltip text	ToolTip
Appearance settings (background and foreground color, font and border options)	Appearance

Add a Form Field as a Graphics Content

To add a radio group field as graphics content, pass a PdfGraphicsAcroFormRadioGroupField object as a parameter to the PdfGraphics.AddFormField method. To access PdfGraphics, reference the DevExpress.Pdf.Drawing.v.21.1 assembly.

Draw a Form Field on a Page

To draw an interactive field to a page, call one of the following methods:

• PdfGraphics.AddToPageForeground, PdfGraphics.AddToPageBackground – to add a field to an existing page;
• PdfDocumentProcessor.RenderNewPage – to add a field to a new page.

Example

This example shows how to use PDF Graphics API to create a radio button group field and add it to a new page.

View Example

Program.cs

using DevExpress.Pdf;
using System.Drawing;
//...

static void Main(string[] args)
{
    using (PdfDocumentProcessor processor = new PdfDocumentProcessor())
    {
        // Create an empty document. 
        processor.CreateEmptyDocument("..\\..\\Result.pdf");

        // Create graphics and draw a radio button field.
        using (PdfGraphics graphics = processor.CreateGraphics())
        {
            DrawRadioButtonGroupField(graphics);

            // Render a page with graphics.
            processor.RenderNewPage(PdfPaperSize.Letter, graphics);
        }
    }
}

static void DrawRadioButtonGroupField(PdfGraphics graphics)
{
    // Create a radio group field.
    PdfGraphicsAcroFormRadioGroupField radioGroup =
         new PdfGraphicsAcroFormRadioGroupField("First Group");

    // Add the first radio button and specify its location.
    radioGroup.AddButton("button1", new RectangleF(0, 0, 20, 20));

    // Add the second radio button.
    radioGroup.AddButton("button2", new RectangleF(0, 20, 20, 20));

    // Specify selected index, style and appearance parameters.  
    radioGroup.SelectedIndex = 1;
    radioGroup.ButtonStyle = PdfAcroFormButtonStyle.Circle;
    radioGroup.Appearance.BackgroundColor = Color.Aqua;
    radioGroup.Appearance.BorderAppearance =
         new PdfGraphicsAcroFormBorderAppearance() 
    { 
        Color = Color.Red, 
        Width = 3 
    };

    // Add the field to graphics.
    graphics.AddFormField(radioGroup);
}

Program.vb

Imports DevExpress.Pdf
Imports System.Drawing
'...
Shared Sub Main(ByVal args() As String)
    Using processor As New PdfDocumentProcessor()

        ' Create an empty document. 
        processor.CreateEmptyDocument("..\..\Result.pdf")

        ' Create graphics and draw a radio button field.
        Using graphics As PdfGraphics = processor.CreateGraphics()
            DrawRadioButtonGroupField(graphics)

            ' Render a page with graphics.
            processor.RenderNewPage(PdfPaperSize.Letter, graphics)
        End Using
    End Using
End Sub

Private Shared Sub DrawRadioButtonGroupField(ByVal graphics As PdfGraphics)

    ' Create a radio group field.
    Dim radioGroup As New PdfGraphicsAcroFormRadioGroupField("First Group")

    ' Add the first radio button and specify its location.
    radioGroup.AddButton("button1", New RectangleF(0, 0, 20, 20))

    ' Add the second radio button.
    radioGroup.AddButton("button2", New RectangleF(0, 20, 20, 20))

    ' Specify radio group selected index, style and appearance parameters.  
    radioGroup.SelectedIndex = 1
    radioGroup.ButtonStyle = PdfAcroFormButtonStyle.Circle
    radioGroup.Appearance.BackgroundColor = Color.Aqua
    radioGroup.Appearance.BorderAppearance = New PdfGraphicsAcroFormBorderAppearance() With 
    {
        .Color = Color.Red, 
        .Width = 3
    }

    ' Add the field to graphics.
    graphics.AddFormField(radioGroup)
End Sub

Inheritance

Object

PdfGraphicsAcroFormField

PdfGraphicsAcroFormRadioGroupField