❔ hi everyone what

NOT here · 2023-01-30T15:28:49.854Z

i need help in c# what is get and set , and what is a args, and sender? any body can help me!

E

ero•1/30/23, 3:31 PM

get

get

and

set

set

are "accessors" for properties. you can individually assign logic to them to verify input and output for them. you can also omit one or the other, or give one a different accessibility

E

ero•1/30/23, 3:31 PM

$structure

Eero $structure

M

MODiX•1/30/23, 3:31 PM

namespace Namespace;

[Attribute]
public class Class
{
  public string PublicField;
  private bool _privateField;
  protected double protectedField;    

  public int PublicProperty { get; set; }

  public Class() {} // Constructor

  public void Method(int parameter)
  {
    var localVariable = parameter; 
  } 
}

namespace Namespace;

[Attribute]
public class Class
{
  public string PublicField;
  private bool _privateField;
  protected double protectedField;    

  public int PublicProperty { get; set; }

  public Class() {} // Constructor

  public void Method(int parameter)
  {
    var localVariable = parameter; 
  } 
}

namespace Namespace;

[Attribute]
public class Class
{
  public string PublicField;
  private bool _privateField;
  protected double protectedField;    

  public int PublicProperty { get; set; }

  public Class() {} // Constructor

  public void Method(int parameter)
  {
    var localVariable = parameter; 
  } 
}

namespace Namespace;

[Attribute]
public class Class
{
  public string PublicField;
  private bool _privateField;
  protected double protectedField;    

  public int PublicProperty { get; set; }

  public Class() {} // Constructor

  public void Method(int parameter)
  {
    var localVariable = parameter; 
  } 
}

For C# versions older than 10, see

$StructureOld

$StructureOld

$StructureOld

$StructureOld

E

ero•1/30/23, 3:34 PM

a property could be for example;

private int _intProperty;
public int IntProperty
{
  get
  {
    return _intProperty; // this will return _intProperty's current value
  }
  set
  {
    if (value <= 100) // `value` here is the actual value the user passed in when they did `IntProperty = 42` (42)
    {
      _intProperty = value;
    }
    else
    {
      // don't allow values larger than 100
      throw new ArgumentOutOfRangeException();
    }
  }
}

private int _intProperty;
public int IntProperty
{
  get
  {
    return _intProperty; // this will return _intProperty's current value
  }
  set
  {
    if (value <= 100) // `value` here is the actual value the user passed in when they did `IntProperty = 42` (42)
    {
      _intProperty = value;
    }
    else
    {
      // don't allow values larger than 100
      throw new ArgumentOutOfRangeException();
    }
  }
}

private int _intProperty;
public int IntProperty
{
  get
  {
    return _intProperty; // this will return _intProperty's current value
  }
  set
  {
    if (value <= 100) // `value` here is the actual value the user passed in when they did `IntProperty = 42` (42)
    {
      _intProperty = value;
    }
    else
    {
      // don't allow values larger than 100
      throw new ArgumentOutOfRangeException();
    }
  }
}

private int _intProperty;
public int IntProperty
{
  get
  {
    return _intProperty; // this will return _intProperty's current value
  }
  set
  {
    if (value <= 100) // `value` here is the actual value the user passed in when they did `IntProperty = 42` (42)
    {
      _intProperty = value;
    }
    else
    {
      // don't allow values larger than 100
      throw new ArgumentOutOfRangeException();
    }
  }
}

E

ero•1/30/23, 3:34 PM

you can also do

public int IntProperty { get; private set; }

public int IntProperty { get; private set; }

public int IntProperty { get; private set; }

public int IntProperty { get; private set; }

E

ero•1/30/23, 3:35 PM

this won't have any validation of the input or output, this is called an auto-property

E

ero•1/30/23, 3:35 PM

but it's only assignable from the current class it's in

E

ero•1/30/23, 3:38 PM

args

args

is usually a

string[]

string[]

or an

object[]

object[]

object[]

object[] (string array, object array) that gets passed into the entry point of the program (the

Main

Main

) method. it doesn't need to be there, but it can. for console apps, the

args

args

will be all additional information passed into the execution of your program

E

ero•1/30/23, 3:38 PM

$mains

Eero $mains

M

MODiX•1/30/23, 3:38 PM

The possible signatures for

Main

Main

are

public static void Main() { }
public static int Main() { }
public static void Main(string[] args) { }
public static int Main(string[] args) { }
public static async Task Main() { }
public static async Task<int> Main() { }
public static async Task Main(string[] args) { }
public static async Task<int> Main(string[] args) { }

public static void Main() { }
public static int Main() { }
public static void Main(string[] args) { }
public static int Main(string[] args) { }
public static async Task Main() { }
public static async Task<int> Main() { }
public static async Task Main(string[] args) { }
public static async Task<int> Main(string[] args) { }

public static void Main() { }
public static int Main() { }
public static void Main(string[] args) { }
public static int Main(string[] args) { }
public static async Task Main() { }
public static async Task<int> Main() { }
public static async Task Main(string[] args) { }
public static async Task<int> Main(string[] args) { }

public static void Main() { }
public static int Main() { }
public static void Main(string[] args) { }
public static int Main(string[] args) { }
public static async Task Main() { }
public static async Task<int> Main() { }
public static async Task Main(string[] args) { }
public static async Task<int> Main(string[] args) { }

public

public

is not required (can be any accessibility).

Top-level statements are compiled into a

Main

Main

method and will use an appropriate signature depending on whether

args

args

is referenced, the

await

await

operator is used and/or an explicit

return

return

statement is used.

https://docs.microsoft.com/en-US/dotnet/csharp/fundamentals/program-structure/main-command-line

Main() and command-line arguments

Learn about Main() and command-line arguments. The 'Main' method is the entry point of an executable program.

E

ero•1/30/23, 3:38 PM

for example, a console app can be started with

YourProgram.exe arg1 arg2

YourProgram.exe arg1 arg2

YourProgram.exe arg1 arg2

YourProgram.exe arg1 arg2

E

ero•1/30/23, 3:39 PM

the resulting

args

args

array will be a

string[]

string[]

where item 0 is

"arg1"

"arg1"

"arg1"

"arg1" and item 1 is

"arg2"

"arg2"

"arg2"

"arg2"

E

ero•1/30/23, 3:40 PM

sender

sender

(in the context of a winforms app) is the object which caused the invocation (raising, execution) of the event

Eero `sender` (in the context of a winforms app) is the object which caused the invoc...

N

NOT hereOP•1/30/23, 3:42 PM

no i mean like

void OnSliderValueChanged(object sender, ValueChangedEventArgs args)

void OnSliderValueChanged(object sender, ValueChangedEventArgs args)

void OnSliderValueChanged(object sender, ValueChangedEventArgs args)

void OnSliderValueChanged(object sender, ValueChangedEventArgs args)

E

ero•1/30/23, 3:43 PM

yes

E

ero•1/30/23, 3:43 PM

in this example,

sender

sender

will be the

Slider

Slider

Slider

Slider which raised the

OnSliderValueChanged

OnSliderValueChanged

OnSliderValueChanged

OnSliderValueChanged event

Eero yes

N

NOT hereOP•1/30/23, 3:47 PM

thanks

A

Accord•1/31/23, 4:07 PM

Was this issue resolved? If so, run

/close

/close

otherwise I will mark this as stale and this post will be archived until there is new activity.

❔ hi everyone what

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