How to Fill and Edit PDF Forms

using IronPdf;

PdfDocument pdf = PdfDocument.FromFile("textAreaAndInputForm.pdf");

// Set text input form values
pdf.Form.FindFormField("firstname").Value = "John";
pdf.Form.FindFormField("lastname").Value = "Smith";

// Set text area form values
pdf.Form.FindFormField("address").Value = "Iron Software LLC\r\n205 N. Michigan Ave.";

pdf.SaveAs("textAreaAndInputFormEdited.pdf");

Imports Microsoft.VisualBasic
Imports IronPdf

Private pdf As PdfDocument = PdfDocument.FromFile("textAreaAndInputForm.pdf")

' Set text input form values
pdf.Form.FindFormField("firstname").Value = "John"
pdf.Form.FindFormField("lastname").Value = "Smith"

' Set text area form values
pdf.Form.FindFormField("address").Value = "Iron Software LLC" & vbCrLf & "205 N. Michigan Ave."

pdf.SaveAs("textAreaAndInputFormEdited.pdf")

using IronPdf;
using System;

// Load a PDF document from a file
PdfDocument pdf = PdfDocument.FromFile("checkboxAndComboboxForm.pdf");

// Find the checkbox form field within the PDF and check it (set its value to "Yes")
var checkboxForm = pdf.Form.FindFormField("taskCompleted");
if (checkboxForm != null)
{
    checkboxForm.Value = "Yes";
}
else
{
    Console.WriteLine("Checkbox form field 'taskCompleted' not found.");
}

// Find the combobox form field within the PDF and set its value to "Low"
var comboboxForm = pdf.Form.FindFormField("priority");
if (comboboxForm != null)
{
    comboboxForm.Value = "Low";

    // Print out all the available choices for the combobox to the console
    foreach (var choice in comboboxForm.Choices)
    {
        Console.WriteLine(choice);
    }
}
else
{
    Console.WriteLine("Combobox form field 'priority' not found.");
}

// Save the modified PDF with the new form field values to a new file
pdf.SaveAs("checkboxAndComboboxFormEdited.pdf");

Imports IronPdf
Imports System

' Load a PDF document from a file
Private pdf As PdfDocument = PdfDocument.FromFile("checkboxAndComboboxForm.pdf")

' Find the checkbox form field within the PDF and check it (set its value to "Yes")
Private checkboxForm = pdf.Form.FindFormField("taskCompleted")
If checkboxForm IsNot Nothing Then
	checkboxForm.Value = "Yes"
Else
	Console.WriteLine("Checkbox form field 'taskCompleted' not found.")
End If

' Find the combobox form field within the PDF and set its value to "Low"
Dim comboboxForm = pdf.Form.FindFormField("priority")
If comboboxForm IsNot Nothing Then
	comboboxForm.Value = "Low"

	' Print out all the available choices for the combobox to the console
	For Each choice In comboboxForm.Choices
		Console.WriteLine(choice)
	Next choice
Else
	Console.WriteLine("Combobox form field 'priority' not found.")
End If

' Save the modified PDF with the new form field values to a new file
pdf.SaveAs("checkboxAndComboboxFormEdited.pdf")

using IronPdf;
using System;

// Load the PDF document from the local file system
PdfDocument pdf = PdfDocument.FromFile("radioButtonForm.pdf");

// Find the form field associated with radio buttons
var radioForm = pdf.Form.FindFormField("traveltype");

if (radioForm != null)
{
    // Set the radio button value to the desired option
    radioForm.Value = "Airplane";

    // Print out all the available choices for this radio button field
    // Annotations are often used for different options in radio buttons
    foreach (var annotation in radioForm.Annotations)
    {
        // Display the on-appearance state of each radio button choice
        Console.WriteLine(annotation.OnAppearance);
    }

    // Save the modified PDF document under a new file name
    pdf.SaveAs("radioButtonFormEdited.pdf");
}
else
{
    Console.WriteLine("Radio form field 'traveltype' was not found.");
}

Imports IronPdf
Imports System

' Load the PDF document from the local file system
Private pdf As PdfDocument = PdfDocument.FromFile("radioButtonForm.pdf")

' Find the form field associated with radio buttons
Private radioForm = pdf.Form.FindFormField("traveltype")

If radioForm IsNot Nothing Then
	' Set the radio button value to the desired option
	radioForm.Value = "Airplane"

	' Print out all the available choices for this radio button field
	' Annotations are often used for different options in radio buttons
	For Each annotation In radioForm.Annotations
		' Display the on-appearance state of each radio button choice
		Console.WriteLine(annotation.OnAppearance)
	Next annotation

	' Save the modified PDF document under a new file name
	pdf.SaveAs("radioButtonFormEdited.pdf")
Else
	Console.WriteLine("Radio form field 'traveltype' was not found.")
End If

using IronPdf; // Import the IronPdf library for handling PDF documents.
using IronSoftware.Forms; // Import the IronSoftware.Forms library to handle form fields.

// Load an existing PDF document from a file named "textAreaAndInputForm.pdf".
PdfDocument pdf = PdfDocument.FromFile("textAreaAndInputForm.pdf");

// Find the form field with the name "firstname" in the PDF.
// The method FindFormField is used to get a handle on the form field if it exists.
IFormField targetForm = pdf.Form.FindFormField("firstname");

// Check if the form field was found before attempting to remove it.
// This prevents potential errors if the form field does not exist.
if (targetForm != null)
{
    // Remove the identified form field from the PDF.
    // Once removed, this field will no longer appear in the document.
    pdf.Form.Remove(targetForm);
}

// Save the modified PDF to a new file called "removedForm.pdf".
// This ensures that the original document is not altered and a new version is saved.
pdf.SaveAs("removedForm.pdf");

// The above code demonstrates how to load a PDF, locate and remove a specific form field,
// and then save the modified PDF to a new file. 
// Ensure that the IronPdf and IronSoftware.Forms libraries are properly referenced in your project.

Imports IronPdf ' Import the IronPdf library for handling PDF documents.
Imports IronSoftware.Forms ' Import the IronSoftware.Forms library to handle form fields.

' Load an existing PDF document from a file named "textAreaAndInputForm.pdf".
Private pdf As PdfDocument = PdfDocument.FromFile("textAreaAndInputForm.pdf")

' Find the form field with the name "firstname" in the PDF.
' The method FindFormField is used to get a handle on the form field if it exists.
Private targetForm As IFormField = pdf.Form.FindFormField("firstname")

' Check if the form field was found before attempting to remove it.
' This prevents potential errors if the form field does not exist.
If targetForm IsNot Nothing Then
	' Remove the identified form field from the PDF.
	' Once removed, this field will no longer appear in the document.
	pdf.Form.Remove(targetForm)
End If

' Save the modified PDF to a new file called "removedForm.pdf".
' This ensures that the original document is not altered and a new version is saved.
pdf.SaveAs("removedForm.pdf")

' The above code demonstrates how to load a PDF, locate and remove a specific form field,
' and then save the modified PDF to a new file. 
' Ensure that the IronPdf and IronSoftware.Forms libraries are properly referenced in your project.