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Fill PDF forms in Flutter

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Nutrient Flutter SDK enables you to fill form fields programmatically. Each form field has a fully qualified name that identifies a specific form field object before you fill it.

Get the fully qualified name of a form field

The following example gets the fully qualified name of the first form field on the first page of a document:

final fields = await controller.document.forms.getFormFields();
// Get the fully qualified name of the first form field.
final String? formFieldName = fields.first.fullyQualifiedName;

Fill the value of a form field

The following example fills a form field with the fully qualified name formFieldName. It also sets two radio buttons with the fully qualified names radioFieldName_0 and radioFieldName_1:

final forms = controller.document.forms;


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


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