合并图像

Aspose.PDF 21.4 允许您合并图像。 Merge Images 方法检查特定文件夹的内容，并处理其中指定类型的文件。在合并图片时，我们指定 ‘inputImagesStreams’、图像格式和图像合并模式（例如 - 垂直）我们的文件。然后我们将结果保存在 FileOutputStream 中。

请遵循以下代码片段来解决您的任务：

合并图像

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void MergeImages01()
{
    var dataDir = RunExamples.GetDataDir_AsposePdf_Images();  // Updated to use dynamic path
    // Get all image files matching the pattern "MergeImages*.jpg"
    var fileStreams = Directory.GetFiles(dataDir, "MergeImages*.jpg")
                                .OrderBy(f => f)
                                .Select(f => File.OpenRead(f))
                                .Cast<Stream>()
                                .ToList();

    using (Stream inputStream = Aspose.Pdf.Facades.PdfConverter.MergeImages(fileStreams, Aspose.Pdf.Drawing.ImageFormat.Jpeg, ImageMergeMode.Vertical, 1, 1))
    using (FileStream outputStream = new FileStream(dataDir + "MergeImages_out.jpg", FileMode.Create))
    {
        // Copy merged images to the output file
        inputStream.CopyTo(outputStream);
    }
}

第二个示例的工作方式与前一个相同，但合并的图像将水平保存。

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void MergeImages02()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Images();

    // Get all image files matching the pattern "MergeImages*.jpg"
    var fileStreams = Directory.GetFiles(dataDir, "MergeImages*.jpg")
                            .OrderBy(f => f)
                            .Select(f => File.OpenRead(f))
                            .Cast<Stream>()
                            .ToList();

    using (Stream inputStream =
            Aspose.Pdf.Facades.PdfConverter.MergeImages(fileStreams, Aspose.Pdf.Drawing.ImageFormat.Jpeg, ImageMergeMode.Horizontal, 1, 1))
    using (FileStream outputStream = new FileStream(dataDir + "MergeImages02_out.jpg", FileMode.Create))
    {
        // Copy merged images to the output file
        inputStream.CopyTo(outputStream);
    }
}

在第三个示例中，我们将通过居中合并图片。两个水平，两个垂直。

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void MergeImages03()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Images();

    // Get all image files matching the pattern "MergeImages*.jpg"
    var fileStreams = Directory.GetFiles(dataDir, "MergeImages*.jpg")
                            .OrderBy(f => f)
                            .Select(f => File.OpenRead(f))
                            .Cast<Stream>()
                            .ToList();

    using (Stream inputStream =
            Aspose.Pdf.Facades.PdfConverter.MergeImages(fileStreams, Aspose.Pdf.Drawing.ImageFormat.Jpeg, ImageMergeMode.Center, 2, 2))
    using (FileStream outputStream = new FileStream(dataDir + "MergeImages03_out.jpg", FileMode.Create))
    {
        // Copy merged images to the output file
        inputStream.CopyTo(outputStream);
    }
}

此外，Aspose.PDF for Java 还为您提供了合并图片并将其保存为 Tiff 格式的机会，使用 MergeImagesAsTiff Method。

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void MergeImages04()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Images();

    // Get all image files matching the pattern "MergeImages*.jpg"
    var fileStreams = Directory.GetFiles(dataDir, "MergeImages*.jpg")
                            .OrderBy(f => f)
                            .Select(f => File.OpenRead(f))
                            .Cast<Stream>()
                            .ToList();

    using (Stream inputStream =
            Aspose.Pdf.Facades.PdfConverter.MergeImagesAsTiff(fileStreams))
    using (FileStream outputStream = new FileStream(dataDir + "MergeImages_out.tiff", FileMode.Create))
    {
        // Copy merged images to the output file
        inputStream.CopyTo(outputStream);
    }
}

要将合并的图像作为一张图像保存到 PDF 页面上，我们将它们放置在 imageStream 中，使用 addImage 方法将结果放置在页面上，并指定我们希望放置它们的坐标。

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void MergeImages05()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Images();

    // Get all image files matching the pattern "MergeImages*.jpg"
    var fileStreams = Directory.GetFiles(dataDir, "MergeImages*.jpg")
                                .OrderBy(f => f)
                                .Select(f => File.OpenRead(f))
                                .Cast<Stream>()
                                .ToList();

    using (Stream inputStream =
            Aspose.Pdf.Facades.PdfConverter.MergeImages(fileStreams, Aspose.Pdf.Drawing.ImageFormat.Jpeg, ImageMergeMode.Vertical, 1, 1))
    using (MemoryStream outputStream = new MemoryStream())  // Output to MemoryStream
    {
        // Copy merged images to the MemoryStream
        inputStream.CopyTo(outputStream);

        // Create PDF document
        using (var document = new Aspose.Pdf.Document())
        {
            // Add page
            var page = document.Pages.Add();

            // Add the image from the MemoryStream to the page
            page.AddImage(outputStream, new Aspose.Pdf.Rectangle(10, 120, 400, 720));

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