Ekstrak gambar dan ubah posisi cap

Ekstrak Gambar dari Cap Gambar

Kelas PdfContentEditor memungkinkan Anda untuk mengekstrak gambar dari cap dalam file PDF. Pertama, Anda perlu membuat objek dari kelas PdfContentEditor dan mengikat file PDF input menggunakan metode BindPdf. Setelah itu, panggil metode GetStamps untuk mendapatkan array objek StampInfo dari halaman tertentu dalam file PDF. Kemudian Anda dapat mendapatkan gambar dari StampInfo menggunakan properti StampInfo.Image. Setelah Anda mendapatkan gambar, Anda dapat menyimpan gambar tersebut atau bekerja dengan berbagai properti gambar. Potongan kode berikut menunjukkan cara mengekstrak gambar dari cap gambar.

.NET Core 3.1

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

    // Instantiate PdfContentEditor object
    using (var pdfContentEditor = new Aspose.Pdf.Facades.PdfContentEditor())
    {
        // Bind PDF document
        pdfContentEditor.BindPdf(dataDir + "ExtractImage-ImageStamp.pdf");

        // Get Stamp info for the first stamp
        var infos = pdfContentEditor.GetStamps(1);

        // Get the image from Stamp Info
        var image = infos[0].Image;

        // Save the extracted image
        image.Save(dataDir + "image_out.jpg");
    }
}

.NET 8

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

    // Instantiate PdfContentEditor object
    using var pdfContentEditor = new Aspose.Pdf.Facades.PdfContentEditor();

    // Bind PDF document
    pdfContentEditor.BindPdf(dataDir + "ExtractImage-ImageStamp.pdf");

    // Get Stamp info for the first stamp
    var infos = pdfContentEditor.GetStamps(1);

    // Get the image from Stamp Info
    var image = infos[0].Image;

    // Save the extracted image
    image.Save(dataDir + "image_out.jpg");
}

Ubah Posisi Cap dalam file PDF

Kelas PdfContentEditor memungkinkan Anda untuk mengubah posisi cap dalam file PDF. Pertama, Anda perlu membuat objek dari kelas PdfContentEditor dan mengikat file PDF input menggunakan metode BindPdf. Setelah itu, panggil metode MoveStamp dengan indeks cap dan posisi baru di halaman tertentu dalam file PDF. Kemudian, Anda dapat menyimpan file yang diperbarui menggunakan metode Save. Potongan kode berikut menunjukkan cara memindahkan cap di halaman tertentu.

.NET Core 3.1

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

    // Instantiate PdfContentEditor object
    using (var pdfContentEditor = new Aspose.Pdf.Facades.PdfContentEditor())
    {
        // Bind PDF document
        pdfContentEditor.BindPdf(dataDir + "ChangeStampPosition.pdf");

        int pageId = 1;
        int stampIndex = 1;
        double x = 200;
        double y = 200;

        // Change the position of the stamp to new x and y position
        pdfContentEditor.MoveStamp(pageId, stampIndex, x, y);

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

.NET 8

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

    // Instantiate PdfContentEditor object
    using var pdfContentEditor = new Aspose.Pdf.Facades.PdfContentEditor();

    // Bind PDF document
    pdfContentEditor.BindPdf(dataDir + "ChangeStampPosition.pdf");

    int pageId = 1;
    int stampIndex = 1;
    double x = 200;
    double y = 200;

    // Change the position of the stamp to new x and y position
    pdfContentEditor.MoveStamp(pageId, stampIndex, x, y);

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

Selain itu, Anda dapat menggunakan metode MoveStampById untuk memindahkan cap tertentu dengan menggunakan StampId.

.NET Core 3.1

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

    // Instantiate PdfContentEditor Object
    using (var pdfContentEditor = new Aspose.Pdf.Facades.PdfContentEditor())
    {
        // Bind PDF document
        pdfContentEditor.BindPdf(dataDir + "ChangeStampPosition.pdf");

        int pageId = 1;
        int stampId = 1;
        double x = 200;
        double y = 200;

        // Change the position of the stamp to new x and y position
        pdfContentEditor.MoveStamp(pageId, stampId, x, y);

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

.NET 8

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

    // Instantiate PdfContentEditor Object
    using var pdfContentEditor = new Aspose.Pdf.Facades.PdfContentEditor();

    // Bind PDF document
    pdfContentEditor.BindPdf(dataDir + "ChangeStampPosition.pdf");

    int pageId = 1;
    int stampId = 1;
    double x = 200;
    double y = 200;

    // Change the position of the stamp to new x and y position
    pdfContentEditor.MoveStamp(pageId, stampId, x, y);

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