Generate Invoice PDF with ASP.Net and C# - Step by Step Guide!

Table of Contents

1. Introduction
2. Designing the Invoice
3. Declaring Namespaces
4. Adding Necessary DLL Files
5. Declaring Company and Invoice Numbers
6. Creating and Populating the Data Table
7. Converting HTML to PDF
8. Generating the Invoice
9. Running the Project
10. Conclusion

Introduction

In this tutorial, we will learn how to generate an invoice in PDF format using ASP.NET. We have already designed a bill copy with fields such as invoice number, order number, date, company name, product details, and total amount. Now, we need to generate a PDF file for the invoice. Let's dive into the code and see how to achieve this.

Designing the Invoice

To begin with, we need to design the invoice layout. We will use HTML code for this purpose. The invoice will include fields like order number, date, company name, product details, and total amount. Once the design is ready, we can move on to the coding part.

Declaring Namespaces

In order to work with file handling and text manipulation, we need to declare the necessary namespaces. These include System.IO, System.Text, and System.Data.

Adding Necessary DLL Files

To convert the HTML document into a PDF file, we require a third-party DLL called "iTextSharp". We can download it from the internet and add it to our project by referencing the DLL file. This DLL file allows us to convert XAML files to PDF format.

Declaring Company and Invoice Numbers

In our code, we need to declare the company name and invoice numbers. These details will be displayed on the generated invoice.

Creating and Populating the Data Table

Next, we will create a data table to store the product details. The data table will have columns for product ID, product name, price, quantity, and total. We will add the product information to the data table so that it can be displayed on the invoice.

Converting HTML to PDF

To convert the HTML document to a PDF file, we will use the iTextSharp library. We will create a PDF document and pass the HTML code to an HTML worker, which will convert it into a PDF format. Finally, we will save the PDF document and download it.

Generating the Invoice

Once all the necessary code is in place, we can generate the invoice by executing the project. This will create a PDF file containing all the relevant details, such as the order number, date, company name, and product information.

Running the Project

To test the functionality of our code, we can run the project and check if the PDF file is being generated successfully. We can also make any necessary adjustments to the design or code if needed.

Conclusion

In conclusion, we have learned how to generate an invoice in PDF format using ASP.NET. By following the steps outlined in this tutorial, you can create professional-looking invoices with all the necessary details. Generating invoices in PDF format makes it easy to share and print them for documentation purposes.