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

By : Tom Owsiak

Buy this Book

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

By: Tom Owsiak

Buy this Book

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.

Preface

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

Creating a Simple Generics Class

Creating a generics class

Adding a button to Default.aspx

Initializing a collection of integers to their array and displaying the results

Chapter review

Summary

Creating a Generic Method

Creating a button to exchange and then comparing two values

Writing a swap function

Chapter review

Summary

Implementing a Generic Interface to Accomplish Sorting

Adding a button to sort and display results

Creating a generics interface class

Entering the reference code

Chapter review

Summary

Making Delegates More Flexible with Generics

Adding a summarize button to the HTML

Summary

Creating and Using Generic Dictionaries

Adding a show button to the HTML

Starting a process from a web page

Making a directory and creating a file from Command Prompt

Chapter review

Summary

Connection Between Delegates and Lambda Expressions

Adding a Show Results button to the HTML

Adding delegates

Chapter review

Summary

Expression-Bodied Lambdas and Expression-Bodied Members

Adding a box and a Find Max button to the HTML

Making the delegate

Chapter review

Summary

Anonymous Methods and Objects That Run Their Own Delegates

Adding a Show Results button to the HTML

Streamlining writing functions

Chapter review

Summary

C# with LINQ and Built-In Types

Adding a Show Values button to the HTML

Adding namespaces

Chapter review

Summary

C# with LINQ and Custom Data Types

Adding a Show People button to the HTML

Setting up a database

Chapter review

Summary

Using Query Syntax to Construct Queries

Adding a show button to the HTML

Creating a decimal salary array

Observing deferred execution

Chapter review

Summary

Queries That Perform Aggregation Functions

Adding a show button to the HTML

Creating an array

Chapter review

Summary

Using LINQ to Summarize Tuples

Adding a show tuple summary values button to the HTML

Introducing tuples

Chapter review

Summary

Summarizing Results with Grouping

Adding a Show Results button to the HTML

Adding namespaces

Chapter review

Summary

Joining Datasets with Inner Joins

Adding a Join Classes button to the HTML

Adding the namespaces

Chapter review

Summary

Downloading, Installing, and Running SQL Server 2017

Downloading SQL Server 2017 express

Working with SQL server inside Visual Studio

Chapter review

Summary

Writing Code to Manually Connect to a Table and Retrieve Records

Adding a show records button to the HTML

Making the connection string

Chapter review

Summary

Inserting Records into Tables Using Stored Procedures

Adding text boxes and a button to the HTML

Reviewing what you created already in SQL Server

Chapter review

Summary

Using the Nullable Feature to Make Apps More Stable

Adding a Show People button to the HTML

Chapter review

Summary

Connecting a Chart Control to SQL Server

Placing a chart into the HTML page

Adding a new table to the People database

Coding the project

Chapter review

Summary

Using LINQ to Operate on Tables from SQL Server

Changing the data in the ExperimentValues table

Chapter review

Summary

Creating a Page That Saves Text to Disk

Creating an application to save text

Chapter review

Summary

Creating a Page That Uses the File Upload Control

Starting our project from scratch

Chapter review

Summary

Serializing and Deserializing Objects

Adding two buttons to the HTML

Chapter review

Summary

Having a Little Fun with Images with Pixel Manipulations

Manipulating an image

Chapter review

Summary

Saving an Image to SQL Server

Adding buttons and a list box to HTML

Chapter review

Summary

Creating and Using an XML File

Adding a button to HTML

Chapter review

Summary

Creating XML Files with C#

Adding a button to HTML

Chapter review

Summary

Querying XML Documents with LINQ

Adding a text box and a button to HTML

Chapter review

Summary

Customer Reviews

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Creating a generics interface class

Next, go to Solution Explorer. Right-click on the name of the website, select Add, and then click on Class. Name the class GenInterface and then click on OK. When the Visual Studio message comes up, click on Yes. Remember, this is just an example.

The code for the GenInterface class is really complex. I'll create it now line-by-line, explaining what I'm doing and why I'm doing it.

First, delete everything except using System; at the very top. Next, you'll make the class called Quad for a four-sided shape of some kind. Enter the following after using System:

public class Quad : IComparable<Quad>

This needs System so that we can use IComparable. If you right-click on it and select Go To Definition in the drop-down menu (F12), you can see the definition of this thing. You will see namespace System near the top, and the...