Question

int width, height;
width = this.Size.Width;
height = this.Size.Height;
width /= 3;
height /= 3;
btn_1.Size = new Size(width, height);

I am trying to make a button’s size and location change when the user resizes a form.

How can I assigning a size to a button?

I tried to make it with changing width and height separately. I know that I can make it by anchoring it, but I would like to make it with pure coding.
Also refreshing the form did not work. I can set the locations of buttons easily with the Location property, but the size property does not work. I couldn’t find the difference…

Here is the full code which works for changing the positions of objects, but does not work for changing the size:

private void form_counterMain_Resize(object sender, EventArgs e)
    {
        int width, height;
        Point templocation;
        templocation = new Point(0, 0);
        width = this.Size.Width;
        height = this.Size.Height;
        width /= 3;
        height /= 3;
        //:::location:::
        btn_1.Location = templocation;
        templocation.X = width;
        btn_2.Location = templocation;
        templocation.X = width * 2;
        btn_3.Location = templocation;
        templocation.X = 0;
        templocation.Y = height;
        btn_4.Location = templocation;
        templocation.X = width;
        btn_5.Location = templocation;
        templocation.X = width * 2;
        btn_6.Location = templocation;
        templocation.Y = height * 2;
        templocation.X = 0;
        btn_7.Location = templocation;
        templocation.X = width;
        btn_8.Location = templocation;
        templocation.X = width * 2;
        btn_9.Location = templocation;

        //:::size:::
        btn_1.Size = new Size(width, height);
        this.Refresh();

Answer 1

I couldn’t manage to find it out, why it does not change it with my code while it works with Jamie’s code. But instead of working on that, i created 9 buttons with pure code. So it gave me ability to change every property.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace hw02
{
public partial class form_counterMain : Form
{
    int[] b=new int[9]; //initialized the counters
    Button[] btn= new Button[9]; //initialized the buttons


    public form_counterMain()
    {
        for (int t = 0; t < 9; t++) //this loop makes all the counters 0
        {
            b[t] = 0;
        }
        for (int t = 0; t < 9;t++) //this loop makes all the buttons assigned to a button
        {
            btn[t]=new Button();
        }
        InitializeComponent();
        changeFunc(); //first calculation
        btn[0].Click += new System.EventHandler(btn0Click); //here i assign the functions to buttons
        btn[1].Click += new System.EventHandler(btn1Click);
        btn[2].Click += new System.EventHandler(btn2Click);
        btn[3].Click += new System.EventHandler(btn3Click);
        btn[4].Click += new System.EventHandler(btn4Click);
        btn[5].Click += new System.EventHandler(btn5Click);
        btn[6].Click += new System.EventHandler(btn6Click);
        btn[7].Click += new System.EventHandler(btn7Click);
        btn[8].Click += new System.EventHandler(btn8Click);

    }
    private void form_counterMain_Resize(object sender, EventArgs e)
    {
        changeFunc();
    }
    private void changeFunc()
    {
        int width, height;
        Point templocation = new Point(0, 0);
        width = this.Size.Width;
        height = this.Size.Height;
        width = width/3 -5; //here i calculated the best values for 3 buttons
        height = height/3-12;
        for (int i = 0; i < 9; i++) //here i assign some necessary values to buttons and read the count numbers from memory
        {
            btn[i].Name = "btn_" + i; //the names are changed!
            btn[i].TabIndex = i;
            btn[i].Text = b[i].ToString();
            btn[i].Size = new Size(width, height);
            btn[i].Visible = true;
            btn[i].Parent = this;
            btn[i].FlatStyle = System.Windows.Forms.FlatStyle.Flat;

        }
        //this lines sets the location of the buttons
        btn[0].Location = templocation;
        templocation.X = width;
        btn[1].Location = templocation;
        templocation.X = width * 2;
        btn[2].Location = templocation;
        templocation.X = 0;
        templocation.Y = height;
        btn[3].Location = templocation;
        templocation.X = width;
        btn[4].Location = templocation;
        templocation.X = width * 2;
        btn[5].Location = templocation;
        templocation.Y = height * 2;
        templocation.X = 0;
        btn[6].Location = templocation;
        templocation.X = width;
        btn[7].Location = templocation;
        templocation.X = width * 2;
        btn[8].Location = templocation;

    }
    //here the functions start, they only increase the integers in the memory and then they force the program to refresh its visual state
    private void btn0Click(Object sender, EventArgs e)
    {
        b[0]++;
        changeFunc();
    }
    private void btn1Click(Object sender, EventArgs e)
    {
        b[1]++;
        changeFunc();
    }
    private void btn2Click(Object sender, EventArgs e)
    {
        b[2]++;
        changeFunc();
    }
    private void btn3Click(Object sender, EventArgs e)
    {
        b[3]++;
        changeFunc();
    }
    private void btn4Click(Object sender, EventArgs e)
    {
        b[4]++;
        changeFunc();
    }
    private void btn5Click(Object sender, EventArgs e)
    {
        b[5]++;
        changeFunc();
    }
    private void btn6Click(Object sender, EventArgs e)
    {
        b[6]++;
        changeFunc();
    }
    private void btn7Click(Object sender, EventArgs e)
    {
        b[7]++;
        changeFunc();
    }
    private void btn8Click(Object sender, EventArgs e)
    {
        b[8]++;
        changeFunc();
    }

}
}

I don’t know if someone needs the code, i just pasted.