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Can a  class object be passed as parameter in c#?

Posted on 2014-11-03
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Can a class object be passed as parameter in c#?

Thanks,
D.
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Question by:developer2012
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Assisted Solution

by:anarki_jimbel
anarki_jimbel earned 1000 total points
ID: 40420037
What do you mean "class object"?
Object of some class?
Class as a class type?

In both cases the answer is 'yes'.

See example:
        Object createObjectFrommClassType(Type myType){
    
            Object myObject = Activator.CreateInstance(myType);
            return myObject;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            //possible usage
            object s = createObjectFrommClassType(typeof(Int32));

            System.Diagnostics.Debug.WriteLine("created object is string: " + (s.GetType().ToString() == "System.Int32"));
        }

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But would you give more information on what's required?
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Author Comment

by:developer2012
ID: 40420085
Just trying to pass the object of a class as a parameter..

Would I pass it as any other parameter?
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LVL 30

Expert Comment

by:anarki_jimbel
ID: 40420125
Mmmm, still not quite sure what's required.

Say, if you have a method (event handler in this case) like
private void button2_Click(object sender, EventArgs e)

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then you pass two objects as parameters.

So, what is the problem?
Would this help?:
Passing Parameters (C# Programming Guide)
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LVL 35

Accepted Solution

by:
it_saige earned 1000 total points
ID: 40420191
Short answer to your question.  Yes, a class can be passed as a parameter.
using System;

public class Program
{
	public class SomeClass
	{
		public int ID { get; set; }
		public string Name { get; set; }
	}

	public class SomeOtherClass
	{
		public SomeClass SomeClass { get; set; }

		public SomeOtherClass(SomeClass SomeClass)
		{
			this.SomeClass = SomeClass;
		}

		public override string ToString()
		{
			if (SomeClass != null)
				return string.Format("SomeClass is defined as: ID = {0}; Name = {1}", SomeClass.ID, SomeClass.Name);
			else
				return "SomeClass is not defined...";
		}
	}

	public static void Main()
	{
		SomeClass someClass = new SomeClass() { ID = 1, Name = "I am some class" };
		SomeOtherClass otherClass = new SomeOtherClass(someClass);
		Console.WriteLine(otherClass);

		// Wait for user input to close the program.
		Console.ReadLine();
	}
}

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Produces the following output:Capture.JPG
What anarki is telling you is spot on.  Take for example his/her pointing out the button2_Click signature.  Object and EventArgs are both classes.

-saige-
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Author Closing Comment

by:developer2012
ID: 40420508
Thanks Anarki and It_Sage.  Your answers were perfect !!!
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