CODEWITHSUNDEEP
c#.netwindowsforms
Stroe George
Stroe George

Reputation: 9

Calling a button from form2 when clicking a button from form1

This is a demo example, I can't use the original code. This context is very simplified. I want to call a button/event from the child form (form2) when I'm clicking a button from the mother form (form1). I want to do this via subscribing (which I don't really understard since I'm new to coding).

Mother form:

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

        private void button1_Click(object sender, EventArgs e)
        {
            Form2 f = new Form2();
            f.Show();
            //Call the Button from Form2 here
        }


    }

Child Form:

public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show("MessageBox called from Form1 or Form2");
        }
    }

Upvotes: 0

Views: 695

Answers (2)

Davide Piras
Davide Piras

Reputation: 44605

What you want to do, the way you want to do it, is in general not a good idea as you should not be relying on UI controls on another from, from your other form.

What you can do to achieve what you asked for without rewriting anything is more like this:

1) in the button click of Form2, you do not do anything else than calling a method on Form2, event handler contains no other logic

2) you make that method of form2 public

3) from your button click on form1, you call that same public method of form2

again, this would work but it is not necessarily the best design, it really depends on the whole architecture of your app if this fits or not with the rest or there are better and different ways to accomplish this.

Upvotes: 1

Fabio
Fabio

Reputation: 32445

Don't call other form "button clicks", if you want to call some logic from different places, extract logic into dedicated class and call it from both places

public class MyLogic
{
    public void Execute(string someParameter)
    {
        // Do something with parameter
    }
}

Then use it in both forms

public partial class Form1 : Form
{
    private readonly MyLogic _importantLogic;

    public Form1()
    {
        InitializeComponent();
        _importantLogic = new MyLogic();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        _importantLogic.Execute(this.textBox1.Text);
    }
}

public partial class Form2 : Form
{
    private readonly MyLogic _importantLogic;
    public Form2()
    {
        InitializeComponent();
        _importantLogic = new MyLogic();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        _importantLogic.Execute("Always Form 2");
    }
}

Upvotes: 0

Related Questions