C#•3w ago

✅ ”base”

public class Person
{
    protected string ssn = "444-55-6666";
    protected string name = "John L. Malgraine";

    public virtual void GetInfo()
    {
        Console.WriteLine("Name: {0}", name);
        Console.WriteLine("SSN: {0}", ssn);
    }
}
class Employee : Person
{
    public string id = "ABC567EFG";
    public override void GetInfo()
    {
        // Calling the base class GetInfo method:
        base.GetInfo();
        Console.WriteLine("Employee ID: {0}", id);
    }
}

class TestClass
{
    static void Main()
    {
        Employee E = new Employee();
        E.GetInfo();
    }
}
/*
Output
Name: John L. Malgraine
SSN: 444-55-6666
Employee ID: ABC567EFG
*/

public class Person
{
    protected string ssn = "444-55-6666";
    protected string name = "John L. Malgraine";

    public virtual void GetInfo()
    {
        Console.WriteLine("Name: {0}", name);
        Console.WriteLine("SSN: {0}", ssn);
    }
}
class Employee : Person
{
    public string id = "ABC567EFG";
    public override void GetInfo()
    {
        // Calling the base class GetInfo method:
        base.GetInfo();
        Console.WriteLine("Employee ID: {0}", id);
    }
}

class TestClass
{
    static void Main()
    {
        Employee E = new Employee();
        E.GetInfo();
    }
}
/*
Output
Name: John L. Malgraine
SSN: 444-55-6666
Employee ID: ABC567EFG
*/

Is the “base” keyword only used to get the superclasses info?

19 Replies

Merineth 🇸🇪•3w ago

Would Constructors in the same class can be linked with each other via the keyword base be correct?

Jimmacle•3w ago

"linked with" is odd phrasing they're already "linked" in the sense that Employee derives from Person base is a way to specifically access members of the base class

Merineth 🇸🇪•3w ago

members?

Jimmacle•3w ago

properties, fields, methods

Merineth 🇸🇪•3w ago

methods and attributes = members? aah fields? hahah

Jimmacle•3w ago

protected string ssn = "444-55-6666"; is a field

Merineth 🇸🇪•3w ago

oh In other languages, i’m assuming these are called variables?

Jimmacle•3w ago

as for constructors specifically, the most accurate i could make your statement would be

Constructors in the same class can call each other via the this keyword and can call constructors in the base class using the base keyword

they can be, it's not quite correct i see "attributes" being a common name for them, but in C# that means something different

Merineth 🇸🇪•3w ago

hmm

Jimmacle•3w ago

variables more refer to local variables inside a method or some executing piece of code

Merineth 🇸🇪•3w ago

i was under the impression that classes had attributes and methods only?

Jimmacle•3w ago

technically correct

Merineth 🇸🇪•3w ago

hence why UML class diagrams have them only

Jimmacle•3w ago

C# also has properties, which are syntax sugar for get/set methods

Merineth 🇸🇪•3w ago

so what’s the difference between a field and a attribute? haven’t used them too much yet

Jimmacle•3w ago

in C# an attribute is completely different, it's basically extra information you can put on a class or member for example

class MyClass
{
    [JsonProperty("my_property")] // <-- attribute
    public string MyProperty { get; set; }
}

class MyClass
{
    [JsonProperty("my_property")] // <-- attribute
    public string MyProperty { get; set; }
}

other code can read these attributes and do stuff with them, like this one would tell a json serializer library what name to use for the property in the class's json representation

Merineth 🇸🇪•3w ago

It was explained as defining a person . Where the attributes are information about a person such as age, name etc. e.g Int age = 2 and methods are stuff they can do or perform such as running

Jimmacle•3w ago

as for comparing to UML, a C# field is a UML attribute

Merineth 🇸🇪•3w ago

i see That does clarify it a bit. I’ll return tomorrow, eepy time Thanks king 👑

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✅ ”base”