[原創]C#按比例縮放窗體控件及字體

按照比例縮放窗體控件及字體，如需等比例縮放，只需將x，y的比例設置成相同即可。

為了減小誤差，建議使用原始尺寸來計算比例。

private float X, Y;

        private bool b = false;

        public MainForm()
        {
            InitializeComponent();

            X = this.Width;
            Y = this.Height;

            SetTag(this);

            b = true;
        }

        protected override void OnSizeChanged(EventArgs e)
        {
            if (!b) return;
            
            float newx = (this.Width) / X; 
            float newy = this.Height / Y;
            SetControls(newx, newx, this);

            base.OnSizeChanged(e);
        }

        /// <summary>
        /// 存儲原始控件參數
        /// </summary>
        /// <param name="cons"></param>
        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);
            }
        }

        /// <summary>
        /// 按照比例縮放控件大小及字體
        /// </summary>
        /// <param name="newx"></param>
        /// <param name="newy"></param>
        /// <param name="cons"></param>
        private void SetControls(float newx, float newy, Control cons)
        {
            foreach (Control con in cons.Controls)
            {
                string[] mytag = con.Tag.ToString().Split(new char[] { ':' });
                int width = (int)(Convert.ToSingle(mytag[0]) * newx);
                int height = (int)(Convert.ToSingle(mytag[1]) * newy);
                int x = (int)(Convert.ToSingle(mytag[2]) * newx);
                int y = (int)(Convert.ToSingle(mytag[3]) * newy);
                con.Location = new Point(x, y);
                con.Size = new System.Drawing.Size(width, height);
                Single currentSize = Convert.ToSingle(mytag[4]) * newy;
                con.Font = new Font(con.Font.Name, currentSize, con.Font.Style, con.Font.Unit);

                if (con.Controls.Count > 0)
                {
                    SetControls(newx, newy, con);
                }
            }
        }