将多个项目添加到listBox-仅做一些工作

Question

Currently covering GUI's, I want to write a program that takes two integers and puts them and their product in a listBox . Currently I have a textBox for each integer, and a button that adds them to the listBox . There is then a third button that calculates the product and adds it to the listBox . The first two buttons work - but the third one does not - clicking the button doesn't do anything. Routing that button to a different listBox doesn't fix the error. My current code is below:

        private void button1_Click(object sender, EventArgs e)
    {
        int Int1;
        Int1 = int.Parse(textBox1.Text);
        listBox1.Items.Add(Int1);
    }

    private void button2_Click(object sender, EventArgs e)
    {
        int Int2;
        Int2 = int.Parse(textBox2.Text);
        listBox1.Items.Add(Int2);
    }
    private void button3_Click(object sender, EventArgs e)
    {
        int Product;
        Product = int.Parse(textBox1.Text) * int.Parse(textBox2.Text);
        listBox1.Items.Add(Product);
    }

I have also tried separately parsing textBox1.Text and textBox2.Text when finding Product, to no avail.

EDIT: this.button3.Click += new System.EventHandler(this.button3_Click); was missing from the code. It works now.

Answer 1

this.button3.Click += new System.EventHandler(this.button3_Click); was missing from the code. It works now.