Generating PDF file (invoice) using C#

Apitron — Tue, 30 Oct 2018 13:15:42 +0000

In the my first post, I want to share some of my experience generating PDF documents using Apitron.PDF.Kit for .NET and introduce basic PDF creation techniques. As an example, I chose a frequently used document - an invoice.

The code

I won’t dive into platform specifics here and focus only on PDF generation and related code.

A few functions responsible for PDF generation are listed below:

private void GenerateInvoice(Stream stream)

string imagesPath = @"..\..\images";
FlowDocument document = new FlowDocument();

document.StyleManager.RegisterStyle("gridrow.tableHeader",new Style() {Background = RgbColors.LightSlateGray});
document.StyleManager.RegisterStyle("gridrow.centerAlignedCells > *,gridrow > *.centerAlignedCell",new Style() {Align = Align.Center, Margin = new Thickness(0)});
document.StyleManager.RegisterStyle("gridrow > *.leftAlignedCell",new Style() {Align = Align.Left, Margin = new Thickness(5, 0, 0, 0)});
document.StyleManager.RegisterStyle("gridrow > *",new Style() {Align = Align.Right, Margin = new Thickness(0, 0, 5, 0)});

ResourceManager resourceManager = new ResourceManager();
resourceManager.RegisterResource(
    new Apitron.PDF.Kit.FixedLayout.Resources.XObjects.Image("logo",
    Path.Combine(imagesPath, "storeLogo.png"), true) {Interpolate = true});

resourceManager.RegisterResource(new Apitron.PDF.Kit.FixedLayout.Resources.XObjects.Image("stamp",Path.Combine(imagesPath, "stamp.png"), true) {Interpolate = true});
document.PageHeader.Margin = new Thickness(0, 40, 0, 20);
document.PageHeader.Padding = new Thickness(10, 0, 10, 0);
document.PageHeader.Height = 120;
document.PageHeader.Background = RgbColors.LightGray;
document.PageHeader.LineHeight = 60;
document.PageHeader.Add(new Image("logo"){Height = 50, Width = 50, VerticalAlign = VerticalAlign.Middle});
document.PageHeader.Add(new TextBlock("Invoice")
                        {
                            Display = Display.InlineBlock,
                            Align = Align.Right,
                            Font = new Font(StandardFonts.CourierBold, 20),
                            Color = RgbColors.Black
                        });
Section pageSection = new Section() {Padding = new Thickness(20)};
pageSection.AddItems(CreateInfoSubsections(new string[] {txtCompany.Text,"Bill to:\r\n" + txtCustomerInfo.Text}));

pageSection.Add(new Hr() {Padding = new Thickness(0, 20, 0, 20)});
pageSection.Add(CreateProductsGrid());
pageSection.Add(new Br {Height = 20});
pageSection.Add(new Section() {Width = 250, Display = Display.InlineBlock});
pageSection.Add(new Image("stamp"));

document.Add(pageSection);
document.Write(stream, resourceManager, new PageBoundary(Boundaries.A4));

private Grid CreateProductsGrid()

Grid productsGrid = new Grid(20, Length.Auto, 30, 50, 55, 60);
productsGrid.Add(new GridRow(new TextBlock("#"), new TextBlock("Product"), new TextBlock("Qty."), new TextBlock("Price"), new TextBlock("Disc.(%)"), new TextBlock("Total")) Class = "tableHeader centerAlignedCells"});Decimal invoiceTotal = 0;


foreach (ProductEntry product in products)
{
    TextBlock pos = new TextBlock(product.Pos.ToString()) {Class = "centerAlignedCell"};
    TextBlock description = new TextBlock(product.Description) {Class = "leftAlignedCell"};
    TextBlock qty = new TextBlock(product.Qty.ToString()) {Class = "centerAlignedCell"};
    TextBlock price = new TextBlock( product.Price.ToString(CultureInfo.InvariantCulture));
    TextBlock discount = new TextBlock(product.Discount.ToString(CultureInfo.InvariantCulture));
    TextBlock total = new TextBlock(product.Total.ToString(CultureInfo.InvariantCulture));
    productsGrid.Add(new GridRow(pos, description, qty, price, discount, total));
    invoiceTotal += product.Total;
}

productsGrid.Add(new GridRow(new TextBlock("Total(USD)") {ColSpan = 4}, new TextBlock(invoiceTotal.ToString(CultureInfo.InvariantCulture)) {ColSpan = 2}));

return productsGrid;

DEV Community: Apitron

Generating PDF file (invoice) using C#

The code

private void GenerateInvoice(Stream stream)

private Grid CreateProductsGrid()