lnk Annotation Line Width

Aspose.PDF is a powerful and widely-used tool for working with PDF files in .NET applications. It provides a variety of features for creating, editing, and manipulating PDF files, including the ability to add annotations to pages. In this tutorial, we will explain how to set the line width of a link annotation using Aspose.PDF for .NET.

Once you have these prerequisites, create a new console application project in Visual Studio. Then, add a reference to the Aspose.PDF for .NET library by right-clicking on the project in the Solution Explorer, selecting “Manage NuGet Packages,” and searching for “Aspose.PDF” in the NuGet Package Manager.

To add a lnk annotation to a PDF document, follow these steps:

Step 1: Create a new Document object.

Document doc = new Document();

Step 2: Add a new page to the document.

doc.Pages.Add();

Step 3: Create a list of Point arrays that represent the ink gesture for the annotation.

IList<Point[]> inkList = new List<Point[]>();

Step 4: Create a new LineInfo object that defines the properties of the ink gesture.

LineInfo lineInfo = new LineInfo();
lineInfo.VerticeCoordinate = new float[] { 55, 55, 70, 70, 70, 90, 150, 60 };
lineInfo.Visibility = true;
lineInfo.LineColor = System.Drawing.Color.Red;
lineInfo.LineWidth = 2;

Step 5: Create a new Aspose.Pdf.Point array that represents the gesture from the LineInfo object.

int length = lineInfo.VerticeCoordinate.Length / 2;
Aspose.Pdf.Point[] gesture = new Aspose.Pdf.Point[length];
for (int i = 0; i < length; i++)
{
    gesture[i] = new Aspose.Pdf.Point(lineInfo.VerticeCoordinate[2 * i], lineInfo.VerticeCoordinate[2 * i + 1]);
}

Step 6: Add the gesture to the list of ink gestures.

inkList.Add(gesture);

InkAnnotation a1 = new InkAnnotation(doc.Pages[1], new Aspose.Pdf.Rectangle(100, 100, 300, 300), inkList);

Step 8: Set the subject and title of the annotation.

a1.Subject = "Test";
a1.Title = "Title";

Step 9: Set the color of the annotation.

a1.Color = Aspose.Pdf.Color.FromRgb(System.Drawing.Color.Green);

Step 10: Create a new Border object that defines the properties of the annotation’s border.

Border border = new Border(a1);
border.Width = 3;
border.Effect = BorderEffect.Cloudy;
border.Dash = new Dash(1, 1);
border.Style = BorderStyle.Solid;

Step 11: Add the annotation to the page.

doc.Pages[1].Annotations.Add(a1);

Step 12: Save the document to a file.

// Save output file
doc.Save(dataDir);

The example shows lnk Annotation Line Width with Aspose.PDF for .NET

// The path to the documents directory.
string dataDir = "YOUR DOCUMENT DIRECTORY";

Document doc = new Document();
doc.Pages.Add();
IList<Point[]> inkList = new List<Point[]>();
LineInfo lineInfo = new LineInfo();
lineInfo.VerticeCoordinate = new float[] { 55, 55, 70, 70, 70, 90, 150, 60 };
lineInfo.Visibility = true;
lineInfo.LineColor = System.Drawing.Color.Red;
lineInfo.LineWidth = 2;
int length = lineInfo.VerticeCoordinate.Length / 2;
Aspose.Pdf.Point[] gesture = new Aspose.Pdf.Point[length];
for (int i = 0; i < length; i++)
{
gesture[i] = new Aspose.Pdf.Point(lineInfo.VerticeCoordinate[2 * i], lineInfo.VerticeCoordinate[2 * i + 1]);
}

inkList.Add(gesture);
InkAnnotation a1 = new InkAnnotation(doc.Pages[1], new Aspose.Pdf.Rectangle(100, 100, 300, 300), inkList);
a1.Subject = "Test";
a1.Title = "Title";
a1.Color = Aspose.Pdf.Color.FromRgb(System.Drawing.Color.Green);
Border border = new Border(a1);
border.Width = 3;
border.Effect = BorderEffect.Cloudy;
border.Dash = new Dash(1, 1);
border.Style = BorderStyle.Solid;
doc.Pages[1].Annotations.Add(a1);

dataDir = dataDir + "lnkAnnotationLineWidth_out.pdf";
// Save output file
doc.Save(dataDir);

Conclusion

In this tutorial, we learned how to set the line width of a link annotation in a PDF document using Aspose.PDF for .NET. Aspose.PDF for .NET provides a wide range of tools and features for working with PDF documents, including the ability to create and customize link annotations. By following the step-by-step guide and using the provided C# source code, developers can easily add interactive links to their PDF documents, enhancing the user experience and interactivity of their applications. Aspose.PDF for .NET is a versatile library that empowers .NET developers to work with PDF files efficiently and effectively.

FAQ’s

A: A link annotation in a PDF document is an interactive element that allows you to create hyperlinks or actions that direct the user to another location within the same document, an external website, or a different PDF document.

A: To set the line width of a link annotation using Aspose.PDF for .NET, you can create an InkAnnotation object and specify the line width property.

A: You can customize various properties of a link annotation in Aspose.PDF for .NET, such as its location, size, color, border properties (width, style, dash pattern, and effect), subject, title, and visibility.

A: Yes, you can create a link annotation that contains multiple ink gestures by adding multiple Point arrays to the InkAnnotation object.

Q: How can I add a link annotation to a specific page of the PDF document?

A: To add a link annotation to a specific page of the PDF document, you need to specify the page number when creating the InkAnnotation object. For example, new InkAnnotation(doc.Pages[1], ...) adds the link annotation to the first page.

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