Question

I am quite new to windows forms. I would like to know if it is possible to fire a method in form 1 on click of a button in form 2?
My form 1 has a combobox. My form 2 has a Save button. What I would like to achieve is:
When the user clicks on Save in form 2, I need to check if form 1 is open. If it is open, I want to get the instance and call the method that would repopulate the combo on form 1.

I would really appreciate if I get some pointers on how I can do work this out. If there any other better way than this, please do let me know.

Thanks 🙂

Added:
Both form 1 and form 2 are independent of each other, and can be opened by the user in any order.

Answer 1

You can get a list of all currently open forms in your application through the Application.OpenForms property. You can loop over that list to find Form1. Note though that (in theory) there can be more than one instance of Form1 (if your application can and has created more than one instance).

Sample:

foreach (Form form in Application.OpenForms)
{
    if (form.GetType() == typeof(Form1))
    {
        ((Form1)form).Close();
    }
}

This code will call YourMethod on all open instances of Form1.

(edited the code sample to be 2.0-compatible)