c#实现窗体大小改变时，控件大小也跟着改变，实现窗体拉伸重绘

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

        private void Form1_Load(object sender, EventArgs e)
        {
            this.Resize += new EventHandler(MainForm_Resize); //添加窗体拉伸重绘事件
            xvalues = this.Width;//记录窗体初始大小
            yvalues = this.Height;
            SetTag(this);
        }
        private void MainForm_Resize(object sender, EventArgs e)//重绘事件
        {
            float newX = this.Width / xvalues;//获得比例
            float newY = this.Height / yvalues;
            SetControls(newX, newY, this);
        }
        private void SetControls(float newX, float newY, Control cons)//改变控件的大小
        {
            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]) * newY;

                con.Font = new Font(con.Font.Name, currentSize, con.Font.Style, con.Font.Unit);
                if (con.Controls.Count > 0)
                {
                    SetControls(newX, newY, con);
                }
            }
        }
        /// <summary>
        /// 遍历窗体中控件函数
        /// </summary>
        /// <param name="cons"></param>
        private void SetTag(Control cons)
        {
            foreach (Control con in cons.Controls)  //遍历窗体中的控件,记录控件初始大小
            {
                con.Tag = con.Width + ":" + con.Height + ":" + con.Left + ":" + con.Top + ":" + con.Font.Size;
                if (con.Controls.Count > 0)
                {
                    SetTag(con);
                }
            }
        }
    }

获得屏幕分辨率：

System.Drawing.Rectangle rect = System.Windows.Forms.Screen.PrimaryScreen.Bounds;
            this.Width = rect.Width;
            this.Height =rect.Height;