C# Windows applications

Question

I am developing a project in C# Windows applications(win form) in that I need to create a function to change the back color for all the buttons that are in the single Win Form using button mouse over event

Answer 1

Changing all controls of type Button:

for (int i = 0; i < Controls.Count; i++)
            if (Controls[i] is Button) Controls[i].BackColor = Color.Blue;

Example of hooks:

MouseEnter += new EventHandler(delegate(object sender, EventArgs e)
    {
        SetButtonColour(Color.Blue);
    });

MouseLeave += new EventHandler(delegate(object sender, EventArgs e)
    {
        SetButtonColour(Color.Red);
    });

public void SetButtonColour(Color colour)
    {
        for (int i = 0; i < Controls.Count; i++)
            if (Controls[i] is Button) Controls[i].BackColor = Color.Blue;
    }

Answer 2

Assuming you are just changing your own app, this isn't that difficult.

In the mouse over event, just loop over the Controls property of the form and for all items that are Button, change the back color. You will need to write a recursive function to find all of the buttons probably though, since a Panel (or GroupBox, etc) contains a Controls property for all of its controls.

Answer 3

Something like this:

public partial class Form1 : Form
{
    Color defaultColor;
    Color hoverColor = Color.Orange;

    public Form1()
    {
        InitializeComponent();
        defaultColor = button1.BackColor;
    }

    private void Form1_MouseHover(object sender, EventArgs e)
    {
        foreach (Control ctrl in this.Controls)
        {
            if (ctrl is Button)
            {
                ctrl.BackColor = hoverColor;
            }
        }
    }

    private void Form1_MouseLeave(object sender, EventArgs e)
    {
        foreach (Control ctrl in this.Controls)
        {
            if (ctrl is Button)
            {
                ctrl.BackColor = defaultColor;
            }
        }
    }
}