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Remove form fields from PDFs in C# .NET

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Nutrient .NET SDK (formerly GdPicture.NET) enables you to delete either single form fields or all form fields in a specified PDF document.

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Removing all text form fields

To remove individual form fields, use the RemoveFormField method. It requires only the field ID you want to delete as its parameter. To get a form field’s ID, refer to the get field ID guide.

The following example removes every text form field in the document:

Register the SDK license before running SDK operations. For setup details, refer to the getting started with .NET SDK guide.

using GdPicture14;


LicenseManager license = new LicenseManager();
license.RegisterKEY("");
{
using GdPicturePDF gdpicturePDF = new GdPicturePDF();
gdpicturePDF.LoadFromFile(@"input_forms.pdf");
// Get the form field count.
int fieldCount = gdpicturePDF.GetFormFieldsCount();
// Loop backward through all form fields.
for (int i = fieldCount - 1; i >= 0; i--)
{
    // Get the field ID of each form field.
    int fieldID = gdpicturePDF.GetFormFieldId(i);
    // Check if the current field is of the text box type.
    if (gdpicturePDF.GetFormFieldType(fieldID) == PdfFormFieldType.PdfFormFieldTypeText)
    {
        // Remove the text box field.
        gdpicturePDF.RemoveFormField(fieldID);
    }
}
gdpicturePDF.SaveToFile(@"output.pdf");
}
Used methods
Related topics

For detailed information about how to get the form field ID, refer to the get field ID guide.

Removing all form fields

To remove all form fields in a PDF document, use the RemoveFormFields method:

{
using GdPicturePDF gdpicturePDF = new GdPicturePDF();
gdpicturePDF.LoadFromFile(@"input_forms.pdf");
gdpicturePDF.RemoveFormFields();
gdpicturePDF.SaveToFile(@"output.pdf");
}
Used methods
Related topics