Introduction

        Overview
        What This Book Includes
        Is This Book for You
        What Do You Need to Use This Book
        How This Book is Organized
        What is Left Out
        Using Code Examples
        Customer Support


Overview

Welcome to Practical C# Charts and Graphics. This book is intended for C# .NET developers who want to add professional graphics and charts to their applications. My hope is to write the ultimate C# chart and graphics programming guide, useful to C# application programmers of all skill levels.

We have all heard the saying "a picture is worth a thousand words". Creating charts and graphics plays a very important role in every Windows application. Charts and graphics can make data easier to understand, can add interest to a report, and can have wide applications in our daily life. For instance, in the scientific, engineering, and mathematics community, there is always the need to present data and results graphically. Microsoft Visual C# programming language is one of the best of the few available development tools that provide the computational capability to both generate data as a simulation engine and display it in a variety of graphical representations based on its Graphical Device Interface (GDI+).

The power of the C# programming language, combined with the simplicity of implementing Windows Form applications in Visual Studio .NET, makes real-world Windows program development faster and easier than ever before. Visual C# is a versatile and flexible tool that allows users with even the most elementary programming abilities to produce sophisticated charts, graphics, and graphical user interfaces (GUIs). The level of complexity and sophistication of the graphics and charting applications you create is limited only by your needs, curiosity, and imagination.

As you may have already noticed, most bookstores offer hundreds of C# programming books. The vast majority of these books are general-purpose user guides and tutorials that explain the basics of the C# tool and how to use it to implement simple C# applications. Some of these books contain a chapter or two covering graphics and charts. None, however, provide the level of detail that you will find in this book.

This book is written with the intent of providing you with a complete and comprehensive explanation of the C# graphics and chart capability, and pays special attention to creating charts that can be used directly in your own real world C# Applications. Much of this book contains original work based on my own programming experience in developing commercial Computer Aided Design (CAD) packages. Without C# and the .NET framework, development of advanced graphics and charts can be a difficult and time-consuming task. Often, adding even simple charts or graphs to your applications requires you to waste either effort creating a chart program, or money buying commercial graphics and chart add-on packages.

Using third-party graphics and chart add-on products in your applications has several drawbacks, however:

Visual C# and its powerful GDI+ class make it possible to easily implement your own professional graphics and chart package using entirely managed C# codes. However, Visual C# provides no tools for creating three-dimensional (3D) graphics objects. Even a 3D point, the simplest 3D graphics object, must first be defined in a suitable 3D coordinate system before it can be used as a 3D graphics object.

Practical C# Charts and Graphics provides everything you need to create advanced charts and graphics in your .NET applications. In this book I will show you how to create a variety of graphics and charts that range from simple two-dimensional (2D) X-Y plots to complicated three-dimensional (3D) surface graphs using managed C# code. I try my best to introduce readers to the C# graphics program in a simple way--simple enough to be easily followed by C# beginners who have never had experience developing C# graphics and chart applications. You will learn from this book how to create a full range of color graphics applications and how to use C# controls to create impressive graphic and chart effects without having to buy expensive third-party add-ons.

Practical C# Charts and Graphics is not just a book, but a powerful 2D and 3D chart and graphics package in its own right. You may find that some of the examples in this book can be immediately used in solving your real-world problems, and that some may give you inspiration for adding advanced graphical and sophisticated chart capabilities to your own applications.

What This Book Includes

This book and its sample code listings, which are available for download at this website, provide you with:

Is This Book for You

You do not have to be an experienced C# developer or expert to use this book. I designed this book to be useful to people of all levels of C# programming experience. In fact, I believe if you have some experience with programming languages other than C#, you will be able to sit down in front of your computer, start up Microsoft Visual Studio .NET and C#, follow the examples provided in this book, and quickly become familiar with C# graphics programming. For those of you who are already experienced C# developers, I believe this book has much to offer you as well. There is much information in this book about graphics and chart programming that is not available in any other C# tutorial and reference book. In addition, most of the example programs provided in this book can be used directly in your real-world application development. This book will provide you with a level of detail, explanation, instruction, and sample program code that will enable you to do just about anything graphics and charts-related using Visual C#.

Perhaps you are a scientist, engineer, mathematician, student, or teacher instead of a professional programmer: this book is still a good bet for you. In fact, my own background is in theoretical physics, a field involving extensive numerical calculations, as well as graphical and charting representations of calculated data. I have dedicated my effort to this field for many years, starting from my undergraduate up to my Ph.D. My first computer experience was with FORTRAN. Later on, I had programming experience with Basic, C, C++, and MATLAB. I still remember how hard it was in the early days to present computational results graphically. I often spent hours creating a publication-quality chart by hand, using a ruler, graph paper, and rub-off lettering. A year later, our group bought a graphics and chart package. However, I still needed to prepare my data in a proper format in order to process the data with this package. During that time, I started paying attention to various development tools that could be used to create integrated applications. I tried to find an ideal development tool that would easily allow me to not only generate data (computation capability) but also represent data graphically (graphics and chart power). The C# and Microsoft Visual Studio .NET development environment made it possible to develop such integrated applications. Ever since Microsoft .NET 1.0 came out, I have been in love with the C# language, and have been able to use this tool to successfully create powerful graphics and chart applications, including commercial CAD packages.

The majority of the example programs in this book can be routinely used by C# developers and technical professionals. Throughout this book, I will emphasize the usefulness of C# chart and graphics programming to real-world applications. If you follow this book closely, you will be able to easily develop various practical graphics and chart applications, from simple 2D x-y plots to sophisticated 4D slice graphs. At the same time, I will not spend too much time discussing program style, execution speed, and code optimization, because there is already a plethora of books out there dealing with these topics. Most of the example programs in this book omit error handlings. This makes the code easier to understand by focusing on the key concepts.

What Do You Need to Use This Book

You will need no special equipment to make the best use of this book and understand the algorithms. To run and modify the sample programs, you will need a computer that is capable of running either the Windows 2000 or Windows XP operating system. The software installed on your computer should include Visual Studio .NET or Visual C# .NET standard edition or higher. If you want to run the samples included in Chapter 9, you will also need to have Microsoft Excel installed on your computer.

All of the example programs in this book were created and tested in the professional version of Visual Studio .NET 2005 and Microsoft Excel 2002 (which is part of Microsoft Office XP) under Windows XP. They should be able to run with little or no modification in other operating systems and in other versions of Visual Studio .NET and Excel.

How This Book Is Organized

This book is organized into nine chapters, each of which focuses on a different topic concerning creating C# graphics and chart solutions. The following summaries of each chapter will give you an overview of this book contents:

Chapter 1, C# Graphics Basics
This chapter reviews some of the fundamental aspects of C# graphics programming. If you are an experienced C# programmer, some of this material may already be familiar to you. It includes discussions of various coordinate systems; basic graphics shapes in the GDI+ class; the color system; and advanced custom color maps used in C# applications.

Chapter 2, 2D Matrices and Transformations
This chapter covers the mathematical basics of 2D graphics programming. 2D matrices and transformations in homogeneous space are discussed, including translation, scaling, reflection, and rotation. These 2D matrices and transformations allow a C# application to perform a wide variety of graphical operations on graphics objects in a simple and consistent manner.

Chapter 3, 2D Line Charts
This chapter contains instructions of how to create elementary 2D X-Y line charts. It introduces basic chart elements including chart area, plot area, axes, title, labels, ticks, symbols, and legend. These basic chart elements are common in other types of charts as well.

Chapter 4, Specialized 2D Charts
This chapter covers the specialized charts often found in commercial chart packages and spreadsheet applications. These specialized charts include bar charts, stair-step charts, stem charts, charts with error bars, pie charts, area charts, polar charts, and stock charts.

Chapter 5, 3D Matrices and Transformations
This chapter extends the concepts described in Chapter 2 into the third dimension. It explains how to define 3D graphics objects, and how to translate, scale, reflect, and rotate these 3D objects. It also describes the transformation matrices that represent projections, and transformations that allow you to view 3D graphics objects on a 2D screen. Since there is no 3D matrix class defined in C# and GDI+, this chapter includes instructions on how to create 3D transformation matrices with C#.

Chapter 6, 3D Charts
This extensive chapter begins with a description of the coordinate system used in 3D charts and graphics, and shows you how to create 3D coordinate axes, tick marks, axis labels, and grid lines. It then explains techniques for creating a wide variety of 3D charts, including 3D line charts, 3D mesh and surface charts, contour charts, 3D bar charts, 4D slice charts, and 3D combination charts. In creating these charts, a few specialized techniques, such as Z-order, are used to manipulate the data displayed on your 2D computer screen.

Chapter 7, Charts and User Controls
This chapter shows you how to put 2D and 3D chart applications in a custom user control, and how to use such a control in your C# applications. It begins by explaining the basics of the custom user controls in a C# Windows application, including how to provide design-time support to the controls. Then, it describes in detail the procedure of creating custom user controls for 2D and 3D chart applications, and demonstrates how to use these controls in real-world C# applications.

Chapter 8, DataGridView and Chart User Controls
This chapter consists of a discussion of the basics of the DataGridView and the possibility of combining it with chart controls to create spreadsheet-like chart applications. It shows you how to implement a spreadsheet-like interface in which the data is displayed in the DataGridView control. The displayed data in the DataGridView is plotted in the chart user controls, and direct interaction is allowed between the DataGridView and the chart controls.

Chapter 9, Excel Charts in C# Applications
This chapter explains how a Microsoft Excel chart can be embedded in a C# application. It shows you how to implement charts and graphics in C# projects by taking advantage of the Excel chart and graphics features.

What Is Left Out

This book provides an in-depth description of C# chart and graphics programming for real-world .NET applications. The background material concerning C# graphics was selected for inclusion in the book specifically according to the graphical needs of creating C# chart applications. Thus, this book does not cover image processing, such as the technique for manipulating bitmapped images and image animation. Advanced ray traced images that display reflective, shadowed, transparent, and textured objects are beyond the scope of this book and are not addressed.

Using Code Examples

You may use the code in this book in your applications and documentation. You do not need to contact me or the publisher for permission unless you are reproducing a significant portion of the code. For example, writing a program that uses several chunks of code from this book does not require permission. Selling or distributing the example code listings does require permission. Incorporating a significant amount of example code from this book into your applications and documentation does require permission. Integrating the example code from this book into your commercial products is not allowed without the written permission from the author.

Customer Support

I am always interested in hearing from readers, and would like to hear your thoughts on this book. You can send me comments by e-mail: jxu at DrXuDotNet.com. I will also provide updates, bug fixes, and ongoing support on this very website.

You can also obtain the complete source code for all of examples in this book from this website by clicking here.