Add Text Underline Annotation to Document

Introduction

In this tutorial, we’ll walk through the process of adding a text underline annotation to a document using GroupDocs.Annotation for .NET. Text underline annotations can be useful for emphasizing specific parts of a document, such as important passages or key points.

Prerequisites

Before we begin, ensure that you have the following prerequisites installed:

1. GroupDocs.Annotation for .NET: Download and install GroupDocs.Annotation for .NET from here.
2. .NET Framework: Make sure you have .NET Framework installed on your system.

Importing Namespaces

First, let’s import the necessary namespaces into our project:

using System;
using System.Collections.Generic;
using System.IO;
using GroupDocs.Annotation.Models;
using GroupDocs.Annotation.Models.AnnotationModels;
using GroupDocs.Annotation.Options;

Now, let’s break down the example into multiple steps:

Step 1: Define Output Path

string outputPath = Path.Combine("Your Document Directory", "result" + Path.GetExtension("input.pdf"));

In this step, we define the output path where the annotated document will be saved.

Step 2: Initialize Annotator

using (Annotator annotator = new Annotator("input.pdf"))

Here, we initialize an instance of the Annotator class by providing the input document’s path.

Step 3: Create Underline Annotation

UnderlineAnnotation underline = new UnderlineAnnotation
{
    CreatedOn = DateTime.Now,
    FontColor = 65535,
    Message = "This is underline annotation",
    Opacity = 0.7,
    PageNumber = 0,
    BackgroundColor = 16761035,
    UnderlineColor = 1422623, // works supported only Word and PDF documents
    Points = new List<Point>
    {
        new Point(80, 730), new Point(240, 730), new Point(80, 650), new Point(240, 650)
    },
    Replies = new List<Reply>
    {
        new Reply
        {
            Comment = "First comment",
            RepliedOn = DateTime.Now
        },
        new Reply
        {
            Comment = "Second comment",
            RepliedOn = DateTime.Now
        }
    }
};

This step involves creating an UnderlineAnnotation object with various properties such as font color, message, opacity, page number, background color, underline color, points, and replies.

Step 4: Add Annotation to Document

annotator.Add(underline);

Here, we add the underline annotation to the document.

Step 5: Save Annotated Document

annotator.Save(outputPath);

Finally, we save the annotated document to the specified output path.

Conclusion

In this tutorial, we learned how to add a text underline annotation to a document using GroupDocs.Annotation for .NET. This powerful library provides various annotation options to enhance document collaboration and communication.

FAQ’s

Can I customize the appearance of the underline annotation?

Yes, you can customize properties such as color, opacity, and position according to your requirements.

Is GroupDocs.Annotation compatible with different document formats?

Yes, GroupDocs.Annotation supports a wide range of document formats including Word and PDF.

Can I add multiple annotations to a single document?

Absolutely, GroupDocs.Annotation allows you to add multiple annotations of different types to a document.

Is there a free trial available for GroupDocs.Annotation?

Yes, you can access the free trial version from here.

Where can I get support for GroupDocs.Annotation?

You can get support from the GroupDocs.Annotation community forum here.