C# Winform控件自適應窗體大小

需求：當窗體尺寸動態改變時，窗體中的各種控件（包括Panel以及Panel中的子控件）可以動態調節自身大小，以適應窗體內容比例。

方法：

第一步，新建一個類，代碼如下：

class Resize
    {
        private Form _form;

        public Resize(Form form)
        {
            int count = form.Controls.Count * 2 + 2;
            float[] factor = new float[count];
            int i = 0;
            factor[i++] = form.Size.Width;
            factor[i++] = form.Size.Height;
            foreach (Control ctrl in form.Controls)
            {
                factor[i++] = ctrl.Location.X / (float)form.Size.Width;
                factor[i++] = ctrl.Location.Y / (float)form.Size.Height;
                ctrl.Tag = ctrl.Size;
            }
            form.Tag = factor;
            this._form = form;
        }

        public void Form1_Resize(object sender, EventArgs e)
        {
            float[] scale = (float[])this._form.Tag;
            int i = 2;
            foreach (Control ctrl in this._form.Controls) //panel的長寬增長到一個固定的值就不會再增長了，原因：Panel的寬和高上限是65535像素（https://blog.csdn.net/dufangfeilong/article/details/41805073?utm_source=blogxgwz5）
            {
                ctrl.Left = (int)(this._form.Size.Width * scale[i++]);
                ctrl.Top = (int)(this._form.Size.Height * scale[i++]);
                ctrl.Width = (int)(this._form.Size.Width / (float)scale[0] * ((Size)ctrl.Tag).Width);
                ctrl.Height = (int)(this._form.Size.Height / (float)scale[1] * ((Size)ctrl.Tag).Height);
            }
        }
    }

第二步，在Form的初始化函數中使用這個類：

 public Form_StockCount()
        {
            InitializeComponent();

             this.SizeChanged += new Resize(this).Form1_Resize;  //窗口自適應代碼
         }