The following quick start sections help you in getting started with the GcPdf library:

• Create and save a PDF document

• Load and modify a PDF document

Create and Save a PDF Document

This quick start covers how to create a simple PDF document having a single page and draw string on it in a specified font using a .NET Core or .NET Standard application. Follow the steps below to get started:

1. Create a new PDF document

2. Draw a string on the PDF document

3. Save the PDF document

Step 1: Create a new PDF document

1. Create a new application (.NET Core Console App\Windows Forms App) and add the references.

2. Include the following namespaces

   • using GrapeCity.Documents.Pdf;

   • using GrapeCity.Documents.Text;

3. Create a new PDF document using an instance of GcPdfDocument and define a text format for drawing a string, through code.

   // Create a new PDF document:
   GcPdfDocument doc = new GcPdfDocument();
   // Add a page, and get its Graphics object to draw on:
   GcPdfGraphics g = doc.NewPage().Graphics;
   // Create a text format for the "Hello World!" string:
   TextFormat tf = new TextFormat();
   // Use standard Times font
   tf.Font = StandardFonts.Times;
   // Pick a font size:
   tf.FontSize = 14;

Step 2: Draw a string on the PDF document

Add the following code that uses DrawString method of GcGraphics class to draw string.

// Draw the string at (1",1") from top/left of page
//(72 dpi is the default PDF graphics' resolution):
g.DrawString("Hello World!", tf, new PointF(72, 72));

Step 3: Save the document

Save the document using Save method of the GcPdfDocument class.

//Save PDF document
doc.Save("filename.pdf");

Load and Modify a PDF Document

This quick start covers how to load an existing PDF document, modify and save it using a .NET Core or .NET Standard application. Follow the steps below to get started:

1. Load an existing document in GcPdf

2. Modify the PDF document

3. Save the PDF document

Step 1: Load an existing document in GcPdf

1. Create a new application (.NET Core Console App\Windows Forms App) and add the references.

2. Include the following namespace

   • using GrapeCity.Documents.Pdf;

3. Load an existing document using Load method of the GcPdfDocument class.

   GcPdfDocument doc = new GcPdfDocument();
   
   //Create an object of filestream
   var fs = new FileStream(Path.Combine("DocAttachment.pdf"), FileMode.Open, 
                FileAccess.Read);
   //Load the document
   doc.Load(fs);

Step 2: Modify the document

1. Add a new page to the document using NewPage method of the GcPdfDocument class.

   //Add a new page in the document
   GcPdfGraphics g = doc.NewPage().Graphics;

2. Add the following code that uses DrawString method of GcGraphics class to draw string.

   //Add text on the new page
   g.DrawString("This is a newly added page in the modified document.", new TextFormat()
   {
        Font = StandardFonts.Times,
        FontSize = 12
   }, new PointF(72, 72));

Step 3: Save the document

Save the document using Save method of the GcPdfDocument class.

//Save the document
doc.Save("ModifiedDocument.pdf");