Pass any Custom Class as parameter to a method at runtime

Question

2.33/5 (3 votes)

See more:

Hi All,

I am going to create a method which will require any custom class reference (not object)to Execute.

class A
{
}
class B
{
}

class C
{
  pubilc void RunTimeMethod(Parameter) // Here I want to accept Class A or Class B as parameter at runtime
  {
// Method is working fine if enter I use RuntimeMethod(A obja). But It can be any one class
  }
}
class D:C
{
//C objC = new C();
RunTimeMethod(class);  // Here I want to pass Class A or Class B as parameter at runtime
//RuntimeMethod(A) working fine.
}

So, How to define pass class to method while creating and calling it?

Regards!
Aman

Posted 2-Aug-11 21:09pm

Aman4.net

Updated 11-Aug-11 2:22am

v3

Add a Solution

Comments

Sergey Alexandrovich Kryukov 3-Aug-11 3:26am

What is "class reference (not object)"? There is not such thing. There is System.Type (you can get by typeof). What is "class reference to method"?
This is not just terminology -- you might not understand what are you asking about. Try to use "Improve question" above, if you can.

--SA

Aman4.net 3-Aug-11 3:39am

Question is updated

3 solutions

Solution 3

This is not very useful idea simply because the classes has very little in common: only System.Object as a common base class. The answer depends on what you can do in RunTimeMethod. Not many. You can only call methods of System.Object.

It would look like this:

C#

internal void RunTimeMethod<T>(T t) where T: new()
//the "new" above will guarantee a class with parameter-less constructor
{
   //...
}

As a more advanced approach, you can use Reflection and find out some general purpose constructor. But it's much more robust to demand some common interface for any of the parameter classes and put it in a generic constraint.

C#

internal interface IGenericParameterClass { /*...*/ }
internal class A : IGenericParameterClass { /*...*/ }
internal class B : IGenericParameterClass { /*...*/ }

internal void RunTimeMethod<T>(T t) where T: IGenericParameterClass, new()
//the IGenericParameterClass above will a generic parameter with common interface to use
//in this function
{
   //
}

Also, think about using classic OOP or interface-based approach. You might be trying to heavily abuse OOP in your approach. Just think about it.

Also, if you can explain the ultimate goal of all this activity, you can get a chance to get better advice.

—SA

Posted 3-Aug-11 13:20pm

Sergey Alexandrovich Kryukov

Updated 3-Aug-11 15:28pm

v3

Comments

Wonde Tadesse 3-Aug-11 22:15pm

5+

Sergey Alexandrovich Kryukov 3-Aug-11 22:37pm

Thank you, Wonde.
--SA

Asish Limbu 4-Aug-11 0:00am

Good Stuff.+5.

Sergey Alexandrovich Kryukov 4-Aug-11 0:17am

Thank you, Asish.
--SA

Aman4.net 11-Aug-11 8:20am

Thanx for such good answer, Bascially Class is being stored in Xml after serialization for further use with different technologies. 5+

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Accepted Answer · 2011-08-02T21:24:00

Solution 1

Try:

C#

public static void RunSnippet()
   {
   Button b = new Button();
   Console.WriteLine(myMethod<Button>(b));
   }
public static string myMethod<T>(T t) where T : Control
   {
   return t.ToString();
   }

Posted 2-Aug-11 21:24pm

OriginalGriff

Comments

BobJanova 3-Aug-11 12:25pm

Just as a note, you can do
Console.WriteLine(myMethod(b));

The type parameter T will be inferred from the argument.

OriginalGriff 3-Aug-11 14:15pm

Doh! It's been a long day...

Aman4.net · Accepted Answer · 2011-08-02T21:59:00

Solution 2

Here is an answer with above example

class A
{
}
class B
{
}

class C
{
pubilc void RunTimeMethod<T>() where T: class
{
}
}
class D:C
{
B objB = new B();
if(objB==null)
{
RunTimeMethod<A>();
}
else
{
RunTimeMethod<B>();
}
}

Posted 2-Aug-11 21:59pm

Aman4.net

Updated 11-Aug-11 2:15am

v3