Creating a dynamic extension method in C#?

Hemalatha Sunnapu

7y2.3kLearn iOS Programming

I want to call a extension method with different variables

example:

int i;

i.ExtensionMethod();

float f;

f.ExtensionMethod();

so on and so forth.....

18 Replies

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Sreekanth Reddy7y ago
Accepted answer
@Hemalatha Sunnapu

Please try the following once.

//extension method for int
public static void FunName(this int i, string yourparameter)
{
YourExtensionMethodLogic();
}
//extension method for float
public static void FunName(this float f, string yourparmeter)
{
YourExtensionMethodLogic();
}
public static void YourExtensionMethodLogic(int a , string b,....)
{
//Go with your logic
}

If it helps please mark it as answer else come up with your query.
Thank you.
Hemalatha Sunnapu7y ago
In this way we can achieve calling virtual method with differnt types .
public static bool EqualsMethod(this ValueType i, ValueType obj)
{
}
Its Really awesome... which helped me to get out of this question
Sreekanth Reddy7y ago
@Hemalatha,
"I want for every valuetype"
As I said previously, "It's not possible to create within one shot".
Please go through the following URL too which states as like not possible.

https://stackoverflow.com/questions/38455057/how-can-i-add-an-extension-method-to-many-classes

Mark as answer it it solves, else come up with your query.
Thank you.
Hemalatha Sunnapu7y ago
I want for every valuetype
Sreekanth Reddy7y ago
"Then , if we call that method with types other than byte it raises u a error"

Obviously, As te extension method created for "byte" we get only for byte.
Firstly decide for which types you are expecting your extension method needs to set.
Based on the list we need to set method for all.

That is the reason I had mentioned two(int, string) methods in my previous codes.

Hope you understood. If not come up with your query.
Thank you.
Hemalatha Sunnapu7y ago
Then , if we call that method with types other than byte it raises u a error
Sreekanth Reddy7y ago
The code which you sent is :

public static bool EqualsMethod( byte i, dynamic obj)
{
if (i == obj)
{
res = true;
}

else
{ res = false; }
return res;
}
AND IN MAIN
public class Program
{
public static void Main(string[] args)
{
byte i = 5;
int f1 = 5;
bool result = i.EqualsMethod(f1);
}
}
------------------------------------------------------------------------------------------

In you code the first parameter should be with instace indication keyword "this"
Hence it should be as follows :
public static bool EqualsMethod( this byte i, dynamic obj) { //your code }

Hope you got it.
If you got the solution, accept the answer. Else, come up with new query.
Thank you.
Sreekanth Reddy7y ago
send me the code of byte extension method which you created please.
Hemalatha Sunnapu7y ago
if i do like that , it results me like this ...

'byte' does not contain a definition for 'EqualsMethod' and no extension method 'EqualsMethod' accepting a first argument of type 'byte' could be found (are you missing a using directive or an assembly reference?)
Sreekanth Reddy7y ago
This is wrong :
Extensionmethod(2,3.4);

My code didn't mean like that.

My code result is as you expected..

int i=10;
i.FunName("pass yor parameter related datatype value");

string a ="hai";
a.FunName("Pass your parameter related datatype");
Hemalatha Sunnapu7y ago
Do u mean just calling like this
Extensionmethod(2,3.4);
Sreekanth Reddy7y ago
It works well irrespective of Value or Reference types.
Hemalatha Sunnapu7y ago
Then it wont fit my requirement that
calling with a valutype...
Sreekanth Reddy7y ago
@Hemalatha Sunnapu

public static void YourExtensionMethodLogic(int a , string b,....)
{
//Go with your logic
}

The above is not an extension method.

The below one is the Extension method:
/extension method for int
public static void FunName(this int i, string yourparameter)
{
YourExtensionMethodLogic();
}
//extension method for float
public static void FunName(this float f, string yourparmeter)
{
YourExtensionMethodLogic();
}
Hemalatha Sunnapu7y ago
public static void YourExtensionMethodLogic(int a , string b,....)
{
//Go with your logic
}

is this is a Extension method?
Hemalatha Sunnapu7y ago
int i; float f; char c; string str; long l; byte b; short s;
i.ExtensionMethod();
f.ExtensionMethod();
c.ExtensionMethod();
str.ExtensionMethod();
l.ExtensionMethod();
b.ExtensionMethod();
s.ExtensionMethod();

i should be able to call my 1 extension method with this many types of variables
Sreekanth Reddy7y ago
@Hemalathe Sunnapu

"YourExtensionMethodLogic" is the common function which you can use for any number of types as you expected for float and int. If you dont want params... No problem you can pass your number of parameters... Its not a issue I hope.
Hemalatha Sunnapu7y ago
A parameter array cannot be used with 'this' modifier on an extension method