Contenuti del Corso

C# Beyond Basics

1. Additional Structures & File Handling

What are Lists?Practicing List Declaration List Methods What are Dictionaries?Practicing Dictionaries Reading Files using StreamReader Reading Files using File Methods Writing Files Error Handling Practicing Error Handling

2. Structs & Enumerators

What are Structs?Defining & Using a Structure Practicing Structs Structs with Other Data Structures Struct Methods Correctly Accessing Fields in Struct Methods Practicing Methods Struct Constructors Practicing Constructors Enumerators Practicing Enumerator

3. Introduction to Object-Oriented Programming (OOP)

What is Object-Oriented Programming?Defining Classes Practice: Creating Classes Class Objects Class Objects vs Struct Objects Practice: Objects Class Methods Practice: Methods Class Constructors Practice: Constructors

4. OOP Essentials

Derived Classes Derived Classes Practice Common Access Modifiers Access Modifiers Practice The `static` Keyword Practicing `static` Keyword Method Overloading Method Overloading Practice

5. OOP Principles

What are the Principles of OOP?Inheritance Practicing Inheritance Polymorphism Practicing Polymorphism Encapsulation Encapsulation Practice Abstraction Abstraction Practice What's Next?

Reading Files using File Methods

There are two additional methods of reading files which are significantly shorter in terms of syntax.

Consider a file called "text.txt" which has the following content:

text.txt


              123
            
First
Second
Third

File.ReadAllText Method

We can use the File.ReadAllText to retrieve all the text from a file at once:

index.cs


              12
            
string text = File.ReadAllText("C:/Users/Admin/Desktop/text.txt");
Console.WriteLine(text);

Output:

First
Second
Third

File.ReadAllLines Method

The File.ReadAllLines method retrieves all text as well, however it returns data in the form of a string array where each element is an individual line from the file:

index.cs


              12345
            
string[] lines = File.ReadAllLines("C:/Users/Admin/Desktop/text.txt");

foreach(string line in lines) {
    Console.WriteLine(line);
}

Output:

First
Second
Third

The difference between StreamReader and the File methods is that with StreamReader we have more control over how many lines and which lines we want to read from the file. For-example if there's a file with over a million lines and we want to retrieve only the first 1000 lines or some specific lines from the middle of the file then in that case using StreamReader will be much more efficient.

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Sezione 1. Capitolo 7

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Contenuti del Corso

C# Beyond Basics

1. Additional Structures & File Handling

2. Structs & Enumerators

3. Introduction to Object-Oriented Programming (OOP)

4. OOP Essentials

Derived Classes Derived Classes Practice Common Access Modifiers Access Modifiers Practice The `static` Keyword Practicing `static` Keyword Method Overloading Method Overloading Practice

5. OOP Principles

What are the Principles of OOP?Inheritance Practicing Inheritance Polymorphism Practicing Polymorphism Encapsulation Encapsulation Practice Abstraction Abstraction Practice What's Next?

Reading Files using File Methods

There are two additional methods of reading files which are significantly shorter in terms of syntax.

Consider a file called "text.txt" which has the following content:

text.txt


              123
            
First
Second
Third

File.ReadAllText Method

We can use the File.ReadAllText to retrieve all the text from a file at once:

index.cs


              12
            
string text = File.ReadAllText("C:/Users/Admin/Desktop/text.txt");
Console.WriteLine(text);

Output:

First
Second
Third

File.ReadAllLines Method

The File.ReadAllLines method retrieves all text as well, however it returns data in the form of a string array where each element is an individual line from the file:

index.cs


              12345
            
string[] lines = File.ReadAllLines("C:/Users/Admin/Desktop/text.txt");

foreach(string line in lines) {
    Console.WriteLine(line);
}

Output:

First
Second
Third

Tutto è chiaro?

Grazie per i tuoi commenti!

Sezione 1. Capitolo 7