Dash Length
In this tutorial, we will walk you through the following C# source code step by step to set the length of dashes using Aspose.PDF for .NET.
Make sure you have installed the Aspose.PDF library and set up your development environment before you begin. Also have basic knowledge of C# programming.
Step 1: Document Directory Setup
In the provided source code, you need to specify the directory where you want to save the resulting PDF file. Change the “dataDir” variable to the desired directory.
string dataDir = "YOUR DOCUMENTS DIRECTORY";
Step 2: Instantiating a Document Object and Adding a Page
We create an instance of the Document class and add a page to this document.
Document doc = new Document();
Page page = doc.Pages.Add();
Step 3: Creating a Graph Object and adding it to the page
We create a Graph object with specified dimensions and add it to the page’s paragraph collection.
Aspose.Pdf.Drawing.Graph canvas = new Aspose.Pdf.Drawing.Graph(100, 400);
page.Paragraphs.Add(canvas);
Step 4: Creating a Line Object and Configuring
We create a Line object with the specified coordinates and configure the color and length of the dashes.
Aspose.Pdf.Drawing.Line line = new Aspose.Pdf.Drawing.Line(new float[] { 100, 100, 200, 100 });
line.GraphInfo.Color = Aspose.Pdf.Color.Red;
line.GraphInfo.DashArray = new int[] { 0, 1, 0 };
line.GraphInfo.DashPhase = 1;
Step 5: Adding the Line to the Graph Object
We add the line to the shape collection of the Graph object.
canvas.Shapes.Add(line);
Step 6: Saving the Resulting PDF File
Finally, we save the resulting PDF file with the name “DashLength_out.pdf” in the specified directory.
doc.Save(dataDir + "DashLength_out.pdf");
Sample source code for Dash Length using Aspose.PDF for .NET
// The path to the documents directory.
string dataDir = "YOUR DOCUMENT DIRECTORY";
// Instantiate Document instance
Document doc = new Document();
// Add page to pages collection of Document object
Page page = doc.Pages.Add();
// Create Drawing object with certain dimensions
Aspose.Pdf.Drawing.Graph canvas = new Aspose.Pdf.Drawing.Graph(100, 400);
// Add drawing object to paragraphs collection of page instance
page.Paragraphs.Add(canvas);
// Create Line object
Aspose.Pdf.Drawing.Line line = new Aspose.Pdf.Drawing.Line(new float[] { 100, 100, 200, 100 });
// Set color for Line object
line.GraphInfo.Color = Aspose.Pdf.Color.Red;
// Specify dash array for line object
line.GraphInfo.DashArray = new int[] { 0, 1, 0 };
// Set the dash phase for Line instance
line.GraphInfo.DashPhase = 1;
// Add line to shapes collection of drawing object
canvas.Shapes.Add(line);
dataDir = dataDir + "DashLength_out.pdf";
// Save PDF document
doc.Save(dataDir);
Console.WriteLine("\nLength dashed successfully in black and white.\nFile saved at " + dataDir);
Conclusion
In this tutorial, we explained how to set the length of dashes using Aspose.PDF for .NET. Now you can use this knowledge to create lines with custom dash patterns in your PDF files.
FAQs
Q: What is the purpose of this tutorial?
A: This tutorial’s purpose is to guide you through the process of setting the length of dashes for lines using Aspose.PDF for .NET. You’ll learn how to create lines with custom dash patterns in your PDF files.
Q: What prerequisites are required before starting?
A: Before you start, ensure that you have installed the Aspose.PDF library and set up your development environment. A basic understanding of C# programming is also recommended.
Q: How do I specify the directory for saving the PDF file?
A: Modify the “dataDir” variable in the provided source code to indicate the directory where you want to save the resulting PDF file.
Q: How do I create a line with custom dash patterns?
A: The tutorial demonstrates creating a Line object and configuring its color, dash array, and dash phase using the GraphInfo object. Modify these settings to achieve the desired dash pattern.
Q: Can I customize the color of the line?
A: Yes, you can customize the color of the line by setting the Color property of the GraphInfo object associated with the Line.
Q: How do I save the PDF document after setting the dash length?
A: After configuring the Line object with the desired dash pattern, you can save the resulting PDF document using the doc.Save(dataDir + "DashLength_out.pdf"); line in the provided source code.
