Book Image

Beginning C# 7 Hands-On ??? Advanced Language Features

By : Tom Owsiak
Book Image

Beginning C# 7 Hands-On ??? Advanced Language Features

By: Tom Owsiak

Overview of this book

Beginning C# 7 Hands-On – Advanced Language Features assumes that you’ve mastered the basic elements of the C# language and that you're now ready to learn the more advanced C# language and syntax, line by line, in a working Visual Studio environment. You'll learn how to code advanced C# language topics including generics, lambda expressions, and anonymous methods. You'll learn to use query syntax to construct queries and deploy queries that perform aggregation functions. Work with C# and SQL Server 2017 to perform complex joins and stored procedures. Explore advanced file access methods, and see how to serialize and deserialize objects – all by writing working lines of code that you can run within Visual Studio. This book is designed for beginner C# developers who have mastered the basics now, and anyone who needs a fast reference to using advanced C# language features in practical coding examples. You'll also take a look at C# through web programming with web forms. By the time you’ve finished this book, you’ll know all the critical advanced elements of the C# language and how to program everything from C# generics to XML, LINQ, and your first full MVC web applications. These are the advanced building blocks that you can then combine to exploit the full power of the C# programming language, line by line.
Table of Contents (35 chapters)
Title Page
Credits
About the Author
www.PacktPub.com
Customer Feedback
Preface

Adding a show button to the HTML


Bring up a project and the only thing that will go into the <html> is a button and nothing else. To do this, go to Toolbox, grab a Button control, and drag and drop it below the line beginning with <form id=.... Replace the text on the button to say Show:

<asp:Button ID="Button1" runat="server" Text="Show" />

Now, switch to the Design view, and double-click on the Show button. This takes us into Default.aspx.cs. Delete the event handling stub. The relevant portion of the starting code for this project should look like Figure 11.6.1:

Figure 11.6.1: The starting code section for this project

Next, go to the top of the file and, under using System, enter the following:

using System.Collections.Generic;
using System.Linq;

To make use of this, we'll do what follows. It's routine code; it's mechanical. The first thing is that, when somebody clicks on the Show button, you want to create a label so that there's a cumulative output all the time. To do this...