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Understanding Delegates in C# for Beginners

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kosta
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Joined: 09 Aug 2015
Posts: 161
Location: Salonic

Posted: 13/12/2017 20:25 Post subject: Understanding Delegates in C# for Beginners

Understanding Delegates in C# for Beginners
Delegates as a technical concept in C# create a lot of confusion in the beginners’ mind. It is a fairly simple concept, but most of the examples floating around on the web are so trivial that they do not expose the real benefits of delegates. Look at the below sample:

Code:

public delegate dublu Delegate(int a,int b);
class Class1
{
static double fn_ToHookToTheDelegate(int val1, int val2)
{
return val1 * val2;
}

static void Main(string[] args)
{
//Creating the Delegate Instance
Delegate delObj = new Delegate(fn_ToHookToTheDelegate);
Console.Write("Please Enter Values");
int v1 = Int32.Parse(Console.ReadLine());
int v2 = Int32.Parse(Console.ReadLine());
//Call delegate for processing
double res = delObj(v1, v2);
Console.WriteLine ("Result: " + res);
Console.ReadLine();
}
}

In this example, everything exists within the confines of the same class. The delegate (or the hook, as I call it) and the function to be hooked to it are both in the same class. The following line of code in the Main() makes no pragmatic sense:

Code:

Delegate delObj = new Delegate(fn_ToHookToTheDelegate);

Please read the following articles before proceeding with this article:
http://msdn.microsoft.com/en-us/library/ms173171%28v=vs.90%29.aspx
http://msdn.microsoft.com/en-us/library/ms173172%28v=vs.90%29.aspx
Reading the above-mentioned articles is NOT optional.
read on
https://www.codeproject.com/Articles/884981/Understanding-Delegates-in-Csharp-for-Beginners

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