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C# PDF Form Library
How to add, fill-in Adobe PDF file form field data value using C#. Open source demo code included
Online C# Tutorial to Automatically Fill in Field Data to PDF with C#.NET Library
In this tutorial, you learn how to fill in PDF AcroForm fields' data programmatically using C#
- Find a form field, and fill in field data in PDF
- Fill in data in PDF with existing file path, stream object or byte array
- Support all AcroForms fields, including check box, radio button, text box, list box, combo box
How to fill-in AcroForm field data on PDF programmatically using C#
- A best PDF document SDK library for .NET framework enable users the ability to fill in PDF forms in Visual C# .NET class
- Support .NET WinForms, ASP.NET MVC in IIS, ASP.NET Ajax, Azure cloud service, DNN (DotNetNuke), SharePoint
- Robust .NET components and dlls for filling in PDF form online in ASP.NET WebForm application
- A professional PDF form filler control able to be integrated in Visual Studio .NET WinForm and fill in PDF form use C# language
- Free online C# sample code can help users to fill in PDF form field automatically in .NET
- Support to fill in form field in specified position of adobe PDF file
- Able to fill out all PDF form field in C#.NET
RasterEdge XDoc.PDF SDK package provides PDF field processing features for your C# project. On this C# tutorial,
you will learn how to fill-in field data to PDF automatically in your C#.NET application. Following C# sample code can help you have a quick evaluation of it.
Not all PDF forms are fillable. Sometimes PDF form authors don't convert their PDF to interactive fillable forms.
Or, they intentionally design a form that you can fill in only by hand. These non-interactive forms are called flat forms. These flat forms are not included in PDF specification.
And they will not be supported in XDoc.PDF C# library.
How to fill in PDF forms using C#.NET?
To fill in a PDF form field data, you need locate and find the field on the PDF document. You can either find the field through page position or by field name.
The following C# source code will show how to locate a AcroForm field by page position.
String inputFilePath = Program.RootPath + "\\" + "1_AF.pdf";
String outputFilePath = Program.RootPath + "\\" + "output.pdf";
List<BaseFormField> fields = PDFFormHandler.GetFormFields(inputFilePath);
int cnt = 0;
foreach (BaseFormField field in fields)
{
float x = field.Position.X + field.Size.Width / 2F;
float y = field.Position.Y + field.Size.Height / 2F;
if (field is AFCheckBox)
{ // fill a CheckBox field, set state to ON
AFCheckBoxInput input = new AFCheckBoxInput(true);
PDFFormHandler.FillFormField(inputFilePath, 0, new PointF(x, y), input, outputFilePath + cnt.ToString() + ".pdf");
}
else if (field is AFRadioButton)
{ // fill a RadioButton field, set state to ON
AFRadioButtonInput input = new AFRadioButtonInput(true);
PDFFormHandler.FillFormField(inputFilePath, 0, new PointF(x, y), input, outputFilePath + cnt.ToString() + ".pdf");
}
else if (field is AFTextBox)
{ // fill a TextBox field, change content to "Hello World"
AFTextBoxInput input = new AFTextBoxInput("Hello World");
PDFFormHandler.FillFormField(inputFilePath, 0, new PointF(x, y), input, outputFilePath + cnt.ToString() + ".pdf");
}
else if (field is AFListBox)
{ // fill a ListBox field, selete the 3rd item (with index value 2)
AFListBoxInput input = new AFListBoxInput(new int[1] { 2 });
PDFFormHandler.FillFormField(inputFilePath, 0, new PointF(x, y), input, outputFilePath + cnt.ToString() + ".pdf");
}
else if (field is AFComboBox)
{ // fill a BomboBox field, selete the 3rd item (with index value 2)
AFComboBoxInput input = new AFComboBoxInput(2);
PDFFormHandler.FillFormField(inputFilePath, 0, new PointF(x, y), input, outputFilePath + cnt.ToString() + ".pdf");
}
cnt++;
}
Here is the C# example source code which will explain how to locate a AcroForm field by its name.
String inputFilePath = Program.RootPath + "\\" + "1_AF.pdf";
String outputFilePath = Program.RootPath + "\\" + "output.pdf";
List<BaseFormField> fields = PDFFormHandler.GetFormFields(inputFilePath);
int cnt = 0;
foreach (BaseFormField field in fields)
{
if (field is AFCheckBox)
{ // fill a CheckBox field, set state to ON
AFCheckBoxInput input = new AFCheckBoxInput(true);
PDFFormHandler.FillFormField(inputFilePath, field.Name, input, outputFilePath + cnt.ToString() + ".pdf");
}
else if (field is AFRadioButton)
{ // fill a RadioButton field, set state to ON
AFRadioButtonInput input = new AFRadioButtonInput(true);
PDFFormHandler.FillFormField(inputFilePath, field.Name, input, outputFilePath + cnt.ToString() + ".pdf");
}
else if (field is AFTextBox)
{ // fill a TextBox field, change content to "Hello World"
AFTextBoxInput input = new AFTextBoxInput("Hello World!");
PDFFormHandler.FillFormField(inputFilePath, field.Name, input, outputFilePath + cnt.ToString() + ".pdf");
}
else if (field is AFListBox)
{ // fill a ListBox field, selete the 3rd item (with index value 2)
AFListBoxInput input = new AFListBoxInput(new int[1] { 2 });
PDFFormHandler.FillFormField(inputFilePath, field.Name, input, outputFilePath + cnt.ToString() + ".pdf");
}
else if (field is AFComboBox)
{ // fill a BomboBox field, selete the 3rd item (with index value 2)
AFComboBoxInput input = new AFComboBoxInput(2);
PDFFormHandler.FillFormField(inputFilePath, field.Name, input, outputFilePath + cnt.ToString() + ".pdf");
}
cnt++;
}
How to fill in form fields data in a PDF document object, Stream object, or byte array using C#
You can fill in PDF form data on a PDFDocument object directly. And you can construct the PDFDocument object from an existing PDF file, Stream object, or byte array.
String inputFilePath = Program.RootPath + "\\" + "1_AF.pdf";
String outputFilePath = Program.RootPath + "\\" + "output.pdf";
PDFDocument doc = new PDFDocument(inputFilePath);
List<BaseFormField> fields = PDFFormHandler.GetFormFields(doc);
int cnt = 0;
foreach (BaseFormField field in fields)
{
if (field is AFCheckBox)
{ // fill a CheckBox field, set state to ON
AFCheckBoxInput input = new AFCheckBoxInput(true);
PDFFormHandler.FillFormField(doc, field.Name, input);
}
else if (field is AFRadioButton)
{ // fill a RadioButton field, set state to ON
AFRadioButtonInput input = new AFRadioButtonInput(true);
PDFFormHandler.FillFormField(doc, field.Name, input);
}
else if (field is AFTextBox)
{ // fill a TextBox field, change content to "Hello World"
AFTextBoxInput input = new AFTextBoxInput("Hello World!");
PDFFormHandler.FillFormField(doc, field.Name, input);
}
else if (field is AFListBox)
{ // fill a ListBox field, selete the 3rd item (with index value 2)
AFListBoxInput input = new AFListBoxInput(new int[1] { 2 });
PDFFormHandler.FillFormField(doc, field.Name, input);
}
else if (field is AFComboBox)
{ // fill a BomboBox field, selete the 3rd item (with index value 2)
AFComboBoxInput input = new AFComboBoxInput(2);
PDFFormHandler.FillFormField(doc, field.Name, input);
}
cnt++;
}
doc.Save(outputFilePath);
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