Hapus Form dari PDF di C#

Hapus Teks berdasarkan subtype/form

Potongan kode berikut membuat objek Dokumen baru menggunakan variabel input yang berisi jalur ke file PDF. Contoh ini mengakses form yang disajikan di halaman 2 dokumen dan memeriksa form dengan properti tertentu. Jika form dengan tipe “Typewriter” dan subtype “Form” ditemukan, ia menggunakan TextFragmentAbsorber untuk mengunjungi dan menghapus semua fragmen teks dalam form ini.

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ClearTextInForm(string input, string output)
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Open PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "TextBox.pdf"))
    {
        // Get the forms from the first page
        var forms = document.Pages[1].Resources.Forms;

        foreach (var form in forms)
        {
            // Check if the form is of type "Typewriter" and subtype "Form"
            if (form.IT == "Typewriter" && form.Subtype == "Form")
            {
                // Create a TextFragmentAbsorber to find text fragments
                var absorber = new Aspose.Pdf.Text.TextFragmentAbsorber();
                absorber.Visit(form);

                // Clear the text in each fragment
                foreach (var fragment in absorber.TextFragments)
                {
                    fragment.Text = "";
                }
            }
        }

        // Save PDF document
        document.Save(dataDir + "TextBox_out.pdf");
    }	
}

Hapus Form dengan “Typewriter” dan Subtipe “Form” dari PDF

Potongan kode ini mencari form di halaman pertama dokumen PDF untuk form dengan niat (IT) “Typewriter” dan subtipe (Subtype) “Form.” Jika kedua kondisi terpenuhi, form dihapus dari PDF. Dokumen yang dimodifikasi kemudian disimpan ke file output yang ditentukan.

Pustaka Aspose.PDF menyediakan dua cara untuk menghapus form semacam itu dari PDF:

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void DeleteSpecifiedForm(string input, string output)
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();
	
    // Open PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "TextField.pdf"))
    {
        // Get the forms from the first page
        var forms = document.Pages[1].Resources.Forms;

        // Iterate through the forms and delete the ones with type "Typewriter" and subtype "Form"
        for (int i = forms.Count; i > 0; i--)
        {
            if (forms[i].IT == "Typewriter" && forms[i].Subtype == "Form")
            {
                forms.Delete(forms[i].Name);
            }
        }

        // Save PDF document
        document.Save(dataDir + "TextBox_out.pdf");
    }
}

Metode 2:

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void DeleteSpecifiedForm(string input, string output)
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Open PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "TextField.pdf"))
    {
        // Get the forms from the first page
        var forms = document.Pages[1].Resources.Forms;

        // Iterate through the forms and delete the ones with type "Typewriter" and subtype "Form"
        foreach (var form in forms)
        {
            if (form.IT == "Typewriter" && form.Subtype == "Form")
            {
                var name = forms.GetFormName(form);
                forms.Delete(name);
            }
        }

        // Save PDF document
        document.Save(dataDir + "TextBox_out.pdf");
    }
}

Hapus semua Form dari PDF

Kode ini menghapus semua elemen form dari halaman pertama dokumen PDF dan kemudian menyimpan dokumen yang dimodifikasi ke jalur output yang ditentukan.

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void RemoveAllForms(string input, string output)
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Open PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "TextField.pdf"))
    {
        // Get the forms from the first page
        var forms = document.Pages[1].Resources.Forms;

        // Clear all forms
        forms.Clear();

        // Save PDF document
        document.Save(dataDir + "TextBox_out.pdf");
    }
}