passing only one string value from an event

Question

Hi,

I am new to c#. I am using an event.

Please see the below code.

public interface IMyTest
    {
        event EventHandler<PersonDetailsEventArgs> Save;
    }

    public class MyTest : IMyTest
    {
        public event EventHandler<PersonDetailsEventArgs> Save;

        public void MyMethod()
        {
            // calling save event
            Save(this, new PersonDetailsEventArgs("sss", "AAA"));
        }
    }

    public class PersonDetailsEventArgs : EventArgs
    {
        public string ID { get; set; }
        public string Name { get; set; }

        public PersonDetailsEventArgs(string name, string Id)
        {
            Name = name;
            ID = Id;
        }
    }

I am passing PersonDetailsEventArgs as with two string values.

actually i just want to pass Id.

My question is, is it that for passin gonly Id also I need to create
PersonDetailsEventArgs class.

I don'nt want to create this as I have to pass only one string value.

I am sure i can do this without PersonDetailsEventArgs class. But dnt know how.

Please let me know how I can do this.

Vulpes · Answer

The simplest way would be to add a second constructor to the PersonDetailsEventArgs class which only requires the id to be passed. The Name property will then have it's default value of null: using System; public interface IMyTest { event EventHandler Save; } public class MyTest : IMyTest { public event EventHandler Save; public void MyMethod() { // calling save event Save(this, new PersonDetailsEventArgs("AAA")); // now passing only ID } } public class PersonDetailsEventArgs : EventArgs { public string ID { get; set; } public string Name { get; set; } public PersonDetailsEventArgs(string name, string Id) { Name = name; ID = Id; } public PersonDetailsEventArgs(string Id) { ID = Id; } } class Test { static void Main() { MyTest mt = new MyTest(); mt.Save += Handler; mt.MyMethod(); } static void Handler(object sender, PersonDetailsEventArgs e) { Console.WriteLine(e.ID); // AAA } }