C# How to notify a class (simple true/false) when a static method in another class has been invoked?

Question

• Question:

  How do I notify/update my winform when ping has ran(which would change my hypothetical send indicator)?

• Scenario:

  Say I have thread that is off sending pings to a computer. while the main thread is showing/in charge of the winform gui - completely separate classes.

  1. I have a WinForm that shows two little status indicators(Send & Receive)
  2. I have a class B that has a static method Ping()
  3. I have a thread spawn that continually runs Ping()

Answer 1

you would be best using "events", have a look at the example code that microsoft provide, http://msdn.microsoft.com/en-us/library/aa645739(v=vs.71).aspx

Answer 2

As most people here have suggested used events to do that.

public partial class Form1: Form {
    public Form1() {
        InitializeComponent();
    }

    private void button2_Click(object sender, EventArgs e) {
        Sample sample=new Sample();
        sample.SampleEvent+=sample_SampleEvent;
        sample.SampleMethod();
    }

    private void sample_SampleEvent() {
        Console.WriteLine("SampleMethod has been executed and the method on the WinForm has been notified about it.");
    }
}

public class Sample {
    public event SampleEventHandle SampleEvent;
    protected virtual void OnSampleEvent() {
        var handler=SampleEvent;
        if(handler!=null)
            handler();
    }

    public delegate void SampleEventHandle();


    public void SampleMethod() {
        OnSampleEvent();
    }
}