Question

I’m using 2 classes that contains buttons; I added their buttons in my main form, and now I want to do something when the user clicks on one of them. For example, if the user clicks on the button that’s defined in class1, the text of all the buttons that are defined in class1 should change to “class1”. Actually, I need to find the class of a button to change other variables in that class.

Answer 1

In your class, assign event handlers for the click event on the buttons so when you add them to the form and they’re clicked the event handler will fire off inside of your class so you can access the class properties.

Otherwise, add the class reference to the button’s Tag property.

   class Class1
    {

        public Button MyButton { get; set; }

        public Class1()
        {
            MyButton = new Button();
            MyButton.Click += new EventHandler(MyButton_Click);
        }

        void MyButton_Click(object sender, EventArgs e)
        {
            //Do code here
        }

    }

public partial class Form1 : Form
    {
        Class1 c1 = new Class1();

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            c1.MyButton.Width = 100;
            c1.MyButton.Height = 100;
            c1.MyButton.Top = 0;
            c1.MyButton.Left = 0;
            this.Controls.Add(c1.MyButton);


        }

OR

class Class1 : IButtonClass
    {

        public Button MyButton { get; set; }

        public Class1()
        {
            MyButton = new Button();
            MyButton.Tag = this;        
        }

        public void DoSoemthing()
        {
            //Do something
        }

    }

    interface IButtonClass
    {
        void DoSoemthing();
    }

public partial class Form1 : Form
    {
        Class1 c1 = new Class1();

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            c1.MyButton.Width = 100;
            c1.MyButton.Height = 100;
            c1.MyButton.Top = 0;
            c1.MyButton.Left = 0;
            this.Controls.Add(c1.MyButton);

            c1.MyButton.Click += new EventHandler(MyButton_Click);
        }

    void MyButton_Click(object sender, EventArgs e)
    {
        IButtonClass c = ((Button)sender).Tag as IButtonClass;
        c.DoSoemthing();
    }
}