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Fill PDF forms in Flutter

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Nutrient Flutter SDK allows you to fill form fields programmatically. Each form field has a fully qualified name used to identify and retrieve a specific form field object before filling it.

Obtaining the fully qualified name of a form field

The example below shows how to obtain the fully qualified name of the first form field on the first page of a document:

dynamic allAnnotations = await pdfDocument.getAnnotations(0, 'all');
// Get the fully qualified name for the first form field.
String? formFieldName = (allAnnotations[0]['formFieldName']);

Filling the value of a form field

The example below shows how to fill the value of a form field with a fully qualified name (formFieldName) and two radio buttons with fully qualified names (radioFieldName_0 and radioFieldName_1):

...


await pdfDocument.setFormFieldValue('Dummy Form Field Value', 'formFieldName');


// For radio buttons and checkboxes, use `selected` and `deselected`.
await pdfDocument.setFormFieldValue('selected', 'radioFieldName_0');
await pdfDocument.setFormFieldValue('deselected', 'radioFieldName_1');