winform 在不同分辨率，不同屏幕下，可以任意缩放比例，调整字体大小、界面恢复

Demo 可以到我的Github 下载。 https://github.com/DamonDBT/winform-autosize-dpi

实现

1、 winform 在不同分辨率，不同屏幕下，可以任意缩放比例，

2、控件 相互关系不变，自动跟随主窗体调整大小。

3、增加了一键恢复到原始状态的功能。

4、可以自动调整字体大小。

备注：

1、所有控件的anchor 属性，要用top  left 就是默认。我在程序中修改这个属性，但是好像没用，要手动修改才行，略奇怪。

2、框架窗体（就是父窗体，将来把子窗体放到父窗体的某个控件内）不用调用此类，子窗体调用此类即可。

先看效果

除了，那个日历选择框没法缩放，上面测试的几个控件，使用都没有问题。

主要实现类的源码：

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace AutoSize_1
{
    public class FormControl
    {
        /// <summary>
        /// 不 
        /// </summary>
        public string ControlName { get; set; }
        public Control Paraent { get; set; }
        public List<FormControl> Child { get; set; }
        /// <summary>
        /// 记录当前的位置，
        /// </summary>
        public int Left { get; set; }
        /// <summary>
        /// 记录最开始的数据，用来恢复窗体布局
        /// </summary>
        public int InitLeft { get; set; }
        public int Top { get; set; }
        public int InitTop { get; set; }

        public int Height { get; set; }
        public int InitHeight { get; set; }

        public int Width { get; set; }
        public int InitWidth { get; set; }
        /// <summary>
        /// 字体大小
        /// </summary>
        public double FontSize { get; set; }
        public double InitFontSize { get; set; }

        /// <summary>
        /// 作为中间变量，记录每次变化后的最上层paraent 窗体的大小-X
        /// 只有最上层的控件的有意义，子控件也有这个属性，但是在计算缩放时，因所有控件缩放比例一样，只用的最上层控件的
        /// 在MyResize 事件中。
        /// </summary>
        private int RootParaentX;
        private int RootParaentY;


        public FormControl(Control con)
        {
            this.Paraent = con;
            this.ControlName = con.Name;

            this.Left = con.Left;
            this.Top = con.Top;
            this.Width = con.Width;
            this.Height = con.Height;

            this.InitLeft = con.Left;
            this.InitTop = con.Top;
            this.InitWidth = con.Width;
            this.InitHeight = con.Height;

            this.FontSize = con.Font.Size;
            this.InitFontSize = con.Font.Size;

            this.Child = new List<FormControl>();

            this.RootParaentX = this.Width;
            this.RootParaentY = this.Height;




            Form form = con as Form;
            if (form != null)
            {
                form.Resize += this.MyResize;
            }


            //GetInit(con);
        }
        /// <summary>
        /// 记录所有初始值
        /// </summary>
        /// <param name="cons"></param>
        /// <param name="paraent"></param>
        public void GetInit(Control cons, FormControl paraent)
        {
            if (cons.Controls.Count > 0)
            {
                foreach (Control con in cons.Controls)
                {
                    con.Anchor = AnchorStyles.Left | AnchorStyles.Top;

                    FormControl fc = new FormControl(con);

                    fc.GetInit(con, fc);
                    paraent.Child.Add(fc);
                }
            }
            else
            {
                return;
            }

        }
        /// <summary>
        /// 回到初始状态
        /// </summary>
        /// <param name="cons"></param>
        public void Reset(Control cons, FormControl fcs)
        {
            if (cons.Controls.Count > 0)
            {
                foreach (Control con in cons.Controls)
                {
                    foreach (FormControl fc in fcs.Child)
                    {
                        if (fc.ControlName == con.Name)
                        {
                            con.Left = fc.InitLeft;
                            con.Top = fc.InitTop;
                            con.Width = fc.Width;
                            con.Height = fc.Height;

                            Single currentSize = Convert.ToSingle(fc.InitFontSize);
                            con.Font = new Font(con.Font.Name, currentSize, con.Font.Style, con.Font.Unit);

                            fc.Reset(con, fc);
                        }
                    }
                }
            }

        }
       
        /// <summary>
        /// 窗体变化后自适应
        /// </summary>
        /// 
        public void MyResize(object sender, EventArgs e)
        {
            double newx = Convert.ToDouble(this.Paraent.Width) / RootParaentX;
            double newy = Convert.ToDouble(this.Paraent.Height) / RootParaentY; 

            RootParaentX = this.Paraent.Width;
            RootParaentY = this.Paraent.Height;

            this.SetControls(newx,newy, this.Paraent);


        }

        private void SetControls(double newX, double newY, Control cons)//改变控件的大小
        {
            foreach (Control con in cons.Controls)
            {
                //Debug.Print("变化前：" + con.Width + "  " + con.Height + "  " + con.Left + "  " + con.Height);
                double a = Convert.ToSingle(con.Width * newX);
                con.Width = (int)a;
                a = Convert.ToSingle(con.Height * newY);
                con.Height = (int)a;
                a = Convert.ToSingle(con.Left * newX);
                con.Left = (int)a;
                a = Convert.ToSingle(con.Top * newY);
                con.Top = (int)a;



                //Debug.Print("变化后：" + con.Width + "  " + con.Height + "  " + con.Left + "  " + con.Height);

                Single currentSize = Convert.ToSingle(con.Font.Size * 0.5 * (newY + newX));
                con.Font = new Font(con.Font.Name, currentSize, con.Font.Style, con.Font.Unit);
                if (con.Controls.Count > 0)
                {
                    SetControls(newX, newY, con);
                }
            }
        }


    }
}

调用方法的demo

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

namespace AutoSize_1
{

    public partial class Form2 : Form
    {
        private int formStartX = 0;
        private int formStartY = 0;

        FormControl fc = null;
        public Form2()
        {
            InitializeComponent();
        }
        private void Form2_Load(object sender, EventArgs e)
        {
            fc = new FormControl(this);
            fc.GetInit(this, fc);

            this.formStartX = this.Width;
            this.formStartY = this.Height;

             
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //界面还原的按钮
            this.Width = this.formStartX;
            this.Height = this.formStartY;

            fc.Reset(this, fc);
        } 

    }


}

下载源码，可以上开头的GitHub。