先將窗體windowstate屬性設置為Maximized    



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


        //獲取所有控件屬性（長、寬、位置、字體大小）
        private void setTag(Control cons)
        {
            foreach (Control con in cons.Controls)
            {
                con.Tag 
 
= con.Width + ":" + con.Height + ":" + con.Left + ":" + con.Top + ":" + con.Font.Size;
                if (con.Controls.Count > 0)
                    setTag(con);

                label1.Text += con.Tag;
            }
        }

        //設置控件動態大小
        private void setControls(float newx, float newy, Control cons)
        {
            
 
foreach (Control con in cons.Controls)
            {

                string[] mytag = con.Tag.ToString().Split(new char[] { ‘:‘ });
                float a = Convert.ToSingle(mytag[0]) * newx;
                con.Width = (int)a;
                a = Convert.ToSingle(mytag[1]) * newy;
                con.Height 
 
= (int)(a);
                a = Convert.ToSingle(mytag[2]) * newx;
                con.Left = (int)(a);
                a = Convert.ToSingle(mytag[3]) * newy;
                con.Top = (int)(a);
                Single currentSize = Convert.ToSingle(mytag[4]) * Math.Min(newx, newy);
                con.Font = new Font(con.Font.Name, currentSize, con.Font.Style, con.Font.Unit);
                if (con.Controls.Count > 0)
                {
                    setControls(newx, newy, con);
                }
            }

        }

      
        private void Form1_Load(object sender, EventArgs e)
        {
            setTag(this);
            float newx = (float)this.Width / 794;   //窗體制作時的寬度
            float newy = (float)this.Height / 474;  //窗體制作時的高度
            label1.Text = newx.ToString();
            setControls(newx, newy, this);

        }


    }

【2017-12-06】winfrom 窗體自啟最大化，控件自適應