GroupDocs.Watermark 21.3.0

GroupDocs.Watermark for .NET is a powerful document watermarking API to add image and text watermarks. Furthermore, API works to search and remove the watermarks which were already added to the documents by other third-party software. The watermarks added by this API are hard to remove by any third-party tools. It is straightforward and self-descriptive for integration into the custom applications. Microsoft Word, Excel, PowerPoint, Visio, PDF, raster images, multi-page TIFF and animated GIF formats are supported.

Features:

 * Apply image and text watermark to various document formats;
 * Assign watermark to only particular frames of a multi-frame image;
 * Place watermark or remove it from the background images of documents;
 * Search watermarks based on specific parameters or by combining multiple criteria;
 * Add or remove watermark from a particular section or whole document;
 * Add watermark to images inside documents;
 * Rasterize particular page or whole PDF document to protect added watermarks;
 * Allocate hidden watermark to PDF that only appears when printing document
 * Identify text watermark even if there are unreadable characters between letters;
 * Protect Text Watermark using Unreadable Characters.

Supported document formats:

 * Microsoft Word documents - DOC, DOT, DOCX, DOCM, DOTX, DOTM, RTF;
 * Microsoft Excel spreadsheets - XLS, XLT, XLSB, XLSX, XLSM, XLTX, XLTM;
 * Microsoft PowerPoint presentations - PPT, PPS, PPTX, PPTM, POTX, POTM, PPSX, PPSM;
 * Microsoft Visio diagrams - VSDX, VDX, VSTX, VSSX, VSDM, VSSM, VSTM, VSX, VTX;
 * Open Document formats - ODS, ODT;
 * Portable Document Formats - PDF;
 * Email - EML, EMLX, MSG, OFT;
 * Image - BMP, JPEG, JPEG2000, PNG, GIF, TIFF, WEBP, EMF, WMF.

For more details on the GroupDocs.Watermark for .NET API, please visit GroupDocs website at:
https://www.groupdocs.com/products/watermark/net

Note: GroupDocs.Watermark for .NET will run in evaluation mode. In order to test full features of the product, please request a free 30-day temporary license.

Install-Package GroupDocs.Watermark -Version 21.3.0

dotnet add package GroupDocs.Watermark --version 21.3.0

<PackageReference Include="GroupDocs.Watermark" Version="21.3.0" />

paket add GroupDocs.Watermark --version 21.3.0

#r "nuget: GroupDocs.Watermark, 21.3.0"

// Install GroupDocs.Watermark as a Cake Addin
#addin nuget:?package=GroupDocs.Watermark&version=21.3.0

// Install GroupDocs.Watermark as a Cake Tool
#tool nuget:?package=GroupDocs.Watermark&version=21.3.0

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);
}

// 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);
}

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);
}

// 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);
}

Release Notes

https://docs.groupdocs.com/watermark/net/groupdocs-watermark-for-net-21-3-release-notes

Dependencies

• .NETFramework 2.0

  • No dependencies.

• .NETStandard 2.0

  • SkiaSharp (>= 1.68.0)
  • System.CodeDom (>= 4.4.0)
  • System.Drawing.Common (>= 4.7.0)
  • System.Reflection.Emit (>= 4.3.0)
  • System.Reflection.Emit.ILGeneration (>= 4.3.0)
  • System.Security.Permissions (>= 4.5.0)
  • System.Text.Encoding.CodePages (>= 4.7.0)

Used By

Version History