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C# extension method

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Abdullrhman elhelw answered on August 23, 2020 Popularity 10/10 Helpfulness 3/10

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C# extension method

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/*
-Extension methods are methods that can be inserted into existing types without creating a new derived type, recompiling,
or otherwise modifying the original type.
-Extension methods are static methods, but in C# they are called as if they were normal C# methods.
They use this modifier in their parameters.
-C# already includes a LINQ library extension method based on the IEnumerable interface, and any class that inherits from this interface, such as an array or list.
But if you want to add a new function to any data type, you should make a static class and add any static method as an extension method.
*/
//EX We want to add a print method that can print any type of array.

//First step to create static class

public static class Extensiton {
  //create your function =should be static, and this keyword must precede the method parameter.
  public static void Print < T > (this T[] array) {
    foreach(var item in array) {
      Console.WriteLine(item);
    }
  }
}

//calling Fucntion 

public class Program {
  static void Main(string[] args) {
    var numbers = new int[] {
      1,
      2,
      3,
      4,
      5
    };
    var fruits = new [] {
      "orange",
      "banana",
      "lemon",
      "grabs"
    };
    //print numbers
    numbers.Print(); // 1 2 3 4 5
    //print fruits
    fruits.Print(); // orange banana lemon grabs

    //notice this keyword replace parameter as without extension method you will do this Print(fruits) or Print(numbers)

  }

}

Popularity 10/10 Helpfulness 3/10 Language csharp

Source: Grepper

Tags: c#

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Contributed on Feb 24 2023

Abdullrhman elhelw

0 Answers Avg Quality 2/10

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Extension Method in C# and how to use them?

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using System;

public static class StringExtensions
{
    public static string ToUpperCase(this string input)
    {
        if (string.IsNullOrEmpty(input))
            return input;
        
        return input.ToUpper();
    }
}

Popularity 9/10 Helpfulness 3/10 Language csharp

Source: chat.openai.com

Tags: c#

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Contributed on Aug 09 2023

Said HR

0 Answers Avg Quality 2/10

Extension method C#

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public static void ExtensionMethodName(this ClassToExtend o)
{
    //Do stuff
}

Popularity 9/10 Helpfulness 2/10 Language csharp

Source: monoflauta.com

Tags: c# c

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Contributed on Oct 05 2022

Six Jonathan

0 Answers Avg Quality 2/10

c# extension

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public static class MyClassExtension
{
  // This is the method you are adding to a class "MyClass"
  public static string GetValue(this MyClass myClass)
  {
    return value.toString();
  }
}

// This is how you can use it in other parts of your code
MyClass myClass = new MyClass();
string s = myClass.GetValue();

Popularity 10/10 Helpfulness 2/10 Language csharp

Source: Grepper

Tags: c# c

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Contributed on Aug 23 2020

Cruel Cat

0 Answers Avg Quality 2/10

c# extension methods

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// Simple example of extension method
class Program
{
    static void Main()
    {
        string sampleText = "Hello!";

        Console.WriteLine(sampleText.ModifyText());
    }
}

public static class MyExtensions
{
    public static string ModifyText(this string text)
    {
        string result = // Do something with text here...

        return result;
    }
}

Popularity 8/10 Helpfulness 2/10 Language csharp

Source: www.youtube.com

Tags: c# extension-methods extension-method

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Contributed on Nov 11 2023

Syntax Error

0 Answers Avg Quality 2/10

extension method in c#

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class Program
    {
        static void Main(string[] args)
        {
            string post = "This is supposed to be a very long blog post blah blah blah...";
            var shortenedPost = post.Shorten(5);
 			Console.WriteLine(shortenedPost);
          
           IEnumerable<int> numbers = new List<int>() { 1, 5, 3, 10, 2, 18 };
           var max = numbers.Max();
           Console.WriteLine(max);
           Console.ReadLine();
        }
    }
public static class StringExtensions
    {
        public static string Shorten(this String str, int numberOfWords)
        {
            if (numberOfWords < 0)
                throw new ArgumentOutOfRangeException("numberOfWords should be greater than or equal to 0.");

            if (numberOfWords == 0)
                return "";

            var words = str.Split(' ');

            if (words.Length <= numberOfWords)
                return str;

            return string.Join(" ", words.Take(numberOfWords)) + "...";
        }
    }

Popularity 10/10 Helpfulness 2/10 Language csharp

Source: Grepper

Tags: c# c

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Contributed on Oct 27 2022

Rasel Ahmed

0 Answers Avg Quality 2/10

extension method c#

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// list of useful extension methods
https://www.extensionmethod.net/csharp
https://csharp-extension.com/

Popularity 10/10 Helpfulness 1/10 Language csharp

Source: www.extensionmethod.net

Tags: c# c

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Contributed on Feb 26 2022

ekkamrit

0 Answers Avg Quality 2/10

c# extension method example

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public static class Extention
    {
        public static bool IsImage(this IFormFile file)
        {
            return file.ContentType.Contains("image");
        }
        public static bool ImageSize(this IFormFile file,int kb)
        {
            return file.Length / 1024 > kb;

        }

        public static async Task<string> SaveImage(this IFormFile file, IWebHostEnvironment env, string folder)
        {
            string path = env.WebRootPath;
            string fileName = Guid.NewGuid().ToString() + file.FileName;
            string result = Path.Combine(path, folder, fileName);
            using (FileStream stream = new FileStream(result, FileMode.Create))
            {
                await file.CopyToAsync(stream);
            };

            return fileName;
        }
    }

Popularity 1/10 Helpfulness 1/10 Language csharp

Source: Grepper

Tags: c#

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Contributed on Jun 30 2022

ZeroAndOne Hack Team

0 Answers Avg Quality 2/10

C# extension method

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