GroupDocs.Watermark 19.11.0

Document Watermark Features

• Add text and image watermark to supported document formats.
• Search and remove text and image watermarks.
• Search watermarks in particular objects.
• Apply watermark to images inside a document.
• Work with existing watermark objects.
• Extract information of watermark objects in a document.
• Perform PDF document rasterization.
• Fetch document basic information.
• Search watermarks by text formatting (font, color etc.).
• Set background image for charts in Excel and PowerPoint documents.
• Work with PDF and email attachments.

Read & Write Formats for Watermarking

Microsoft Word: DOC, DOT, DOCX, DOCM, DOTX, DOTM, RTF Microsoft Excel: XLSX, XLSM, XLTM, XLT, XLTX, XLS Microsoft PowerPoint: PPTX, PPTM, PPSX, PPSM, POTX, POTM, PPT, PPS Microsoft Visio: VSD, VDX, VSDX, VSTX, VSS, VSSX, VSDM, VSSM, VSTM, VTX, VSX OpenOffice: ODT Email: EML, EMLX, OFT, MSG Fixed Layout: PDF Image: BMP, GIF, JPG/JPEG/JPE, JP2, PNG, TIFF, WEBP

Platform Independence

Microsoft Windows: Microsoft Windows Desktop (x86, x64) (XP & up), Microsoft Windows Server (x86, x64) (2000 & up) Development Environments: Microsoft Visual Studio (2010 & up) Supported Frameworks: .NET frameworks.

Getting Started with GroupDocs.Watermark for .NET

Are you ready to give GroupDocs.Watermark for .NET a try? Simply execute Install-Package GroupDocs.Watermark from Package Manager Console in Visual Studio to fetch & reference GroupDocs.Watermark assembly in your project. If you already have GroupDocs.Watermark for .Net and want to upgrade it, please execute Update-Package GroupDocs.Watermark to get the latest version.

Please check the GitHub Repository for common usage scenarios.

Add Watermark to Images on a PDF Page via C#

PdfLoadOptions loadOptions = new PdfLoadOptions();
// Constants.InDocumentPdf is an absolute or relative path to your document. Ex: @"C:\Docs\document.pdf"
using (Watermarker watermarker = new Watermarker(Constants.InDocumentPdf, loadOptions))
{
    // initialize image or text watermark
    TextWatermark watermark = new TextWatermark("Protected image", new Font("Arial", 8));
    watermark.HorizontalAlignment = HorizontalAlignment.Center;
    watermark.VerticalAlignment = VerticalAlignment.Center;
    watermark.RotateAngle = 45;
    watermark.SizingType = SizingType.ScaleToParentDimensions;
    watermark.ScaleFactor = 1;

    PdfContent pdfContent = watermarker.GetContent<PdfContent>();

    // get all images from the first page
    WatermarkableImageCollection images = pdfContent.Pages[0].FindImages();

    // add watermark to all found images
    foreach (WatermarkableImage image in images)
    {
        image.Add(watermark);
    }

    watermarker.Save(Constants.OutDocumentPdf);
}

Search Watermarks in PDF using Regular Expression via C#

// Constants.InDocumentPdf is an absolute or relative path to your document. Ex: @"C:\Docs\document.pdf"
using (Watermarker watermarker = new Watermarker(Constants.InDocumentPdf))
{
    Regex regex = new Regex(@"^© \d{4}$");

    // search by regular expression
    TextSearchCriteria textSearchCriteria = new TextSearchCriteria(regex);

    // find possible watermarks using regular expression
    PossibleWatermarkCollection possibleWatermarks = watermarker.Search(textSearchCriteria);

    Console.WriteLine("Found {0} possible watermark(s).", possibleWatermarks.Count);
}

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