Visual FoxPro Requires Chilkat v11.7.0+

Extract the Values of PDF Form Fields

See more PDF Text Extraction Examples

Demonstrates the "formFields" filter. The values of AcroForm fields (text fields, choices, check boxes) are not part of the page's text and are left out by default; "include" places each value at its field's position in the reading order, where a label capture can pick it up. Visual FoxPro

LOCAL lnSuccess
LOCAL loPdf
LOCAL loJson
LOCAL loJsonOut

lnSuccess = 0

*  This example requires the Chilkat API to have been previously unlocked.
*  See Global Unlock Sample for sample code.

*  The filled-in form used in this example is available at filled_form.pdf

loPdf = CreateObject('Chilkat.Pdf')
lnSuccess = loPdf.LoadFile("qa_data/pdf/filled_form.pdf")
IF (lnSuccess = 0) THEN
    ? loPdf.LastErrorText
    RELEASE loPdf
    CANCEL
ENDIF

loJson = CreateObject('Chilkat.JsonObject')
loJsonOut = CreateObject('Chilkat.JsonObject')

*  By default only the page's own text is returned: the captions, without the values typed into the fields.
loJson.UpdateString("layout","lines")
lnSuccess = loPdf.ExtractText("text",loJson,loJsonOut)
IF (lnSuccess = 0) THEN
    ? loPdf.LastErrorText
    RELEASE loPdf
    RELEASE loJson
    RELEASE loJsonOut
    CANCEL
ENDIF

? "---- default ----"
? loJsonOut.StringOf("text")

*  With formFields included, each field's value appears where the field is on the page.
*  A checked check box appears as [x]; an unchecked one has no value.
loJson.UpdateString("formFields","include")
lnSuccess = loPdf.ExtractText("text",loJson,loJsonOut)
IF (lnSuccess = 0) THEN
    ? loPdf.LastErrorText
    RELEASE loPdf
    RELEASE loJson
    RELEASE loJsonOut
    CANCEL
ENDIF

? "---- formFields: include ----"
? loJsonOut.StringOf("text")

*  A field value can be captured by the caption beside it, as for any other text.
loJson.UpdateString("label","Email")
lnSuccess = loPdf.ExtractText("text",loJson,loJsonOut)
IF (lnSuccess = 0) THEN
    ? loPdf.LastErrorText
    RELEASE loPdf
    RELEASE loJson
    RELEASE loJsonOut
    CANCEL
ENDIF

? "Email: " + loJsonOut.StringOf("text")

*  Sample output:

*  ---- default ----
*  Membership Application
*  Name:
*  Email:
*  Phone:
*  Newsletter: Yes, send me the monthly newsletter
*  Volunteer: I am willing to volunteer
*  ---- formFields: include ----
*  Membership Application
*  Name: Dana Whitfield
*  Email: dana.whitfield@example.com
*  Phone: 555-0142
*  Newsletter: [x] Yes, send me the monthly newsletter
*  Volunteer: I am willing to volunteer
*  Email: dana.whitfield@example.com

RELEASE loPdf
RELEASE loJson
RELEASE loJsonOut