C#winform 窗体缩放自适应

1.  首先在窗体上放上一个Panel容器，并将容器的Dock属性设为Fill，即所有的控件都放在了这个容器里。

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
 
namespace WindowsFormsApp2
{
    class AutoAdaptWindowsSize
    {
        double formOriginalWidth;//窗体原始宽度
        double formOriginalHeight;//窗体原始高度
        double scaleX;//水平缩放比例
        double scaleY;//垂直缩放比例
        Dictionary<string, string> ControlsInfo = new Dictionary<string, string>();//控件中心Left,Top,控件Width,控件Height,控件字体Size
 
        private Form _form;
        public AutoAdaptWindowsSize(Form form)
        {
            _form = form;
        }
        /// <summary>
        ///
        /// </summary>
        /// <param name="ctrlContainer">panel 控件</param>
        public void InitControlsInfo(Control ctrlContainer)
        {
            if (ctrlContainer.Parent == _form)//获取窗体的高度和宽度
            {
                formOriginalWidth = Convert.ToDouble(ctrlContainer.Width);
                formOriginalHeight = Convert.ToDouble(ctrlContainer.Height);
            }
            foreach (Control item in ctrlContainer.Controls)
            {
                if (item.Name.Trim() != "")
                {
                    //添加信息：键值：控件名，内容：据左边距离，距顶部距离，控件宽度，控件高度，控件字体。
                    ControlsInfo.Add(item.Name, (item.Left + item.Width / ) + "," + (item.Top + item.Height / ) + "," + item.Width + "," + item.Height + "," + item.Font.Size);
                }
                if ((item as UserControl) == null && item.Controls.Count > )
                {
                    InitControlsInfo(item);
                }
            }
 
        }
 
        public void FormSizeChanged()
        {
            if (ControlsInfo.Count > )//如果字典中有数据，即窗体改变
            {
                ControlsZoomScale(_form.Controls[]);//表示pannel控件
                ControlsChange(_form.Controls[]);
 
            }
        }
        private void ControlsZoomScale(Control ctrlContainer)
        {
            scaleX = (Convert.ToDouble(ctrlContainer.Width) / formOriginalWidth);
            scaleY = (Convert.ToDouble(ctrlContainer.Height) / formOriginalHeight);
        }
 
        /// <summary>
        /// 改变控件大小
        /// </summary>
        /// <param name="ctrlContainer"></param>
        private void ControlsChange(Control ctrlContainer)
        {
            double[] pos = new double[];//pos数组保存当前控件中心Left,Top,控件Width,控件Height,控件字体Size
            foreach (Control item in ctrlContainer.Controls)//遍历控件
            {
                if (item.Name.Trim() != "")//如果控件名不是空，则执行
                {
                    if ((item as UserControl) == null && item.Controls.Count > )//如果不是自定义控件
                    {
                        ControlsChange(item);//循环执行
                    }
                    string[] strs = ControlsInfo[item.Name].Split(',');//从字典中查出的数据，以‘，’分割成字符串组
 
                    for (int i = ; i < ; i++)
                    {
                        pos[i] = Convert.ToDouble(strs[i]);//添加到临时数组
                    }
                    double itemWidth = pos[] * scaleX;     //计算控件宽度，double类型
                    double itemHeight = pos[] * scaleY;    //计算控件高度
                    item.Left = Convert.ToInt32(pos[] * scaleX - itemWidth / );//计算控件距离左边距离
                    item.Top = Convert.ToInt32(pos[] * scaleY - itemHeight / );//计算控件距离顶部距离
                    item.Width = Convert.ToInt32(itemWidth);//控件宽度，int类型
                    item.Height = Convert.ToInt32(itemHeight);//控件高度
                    item.Font = new Font(item.Font.Name, float.Parse((pos[] * Math.Min(scaleX, scaleY)).ToString()));//字体
 
                }
            }
 
        }
 
    }
}

使用：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
 
namespace WindowsFormsApp2
{
    public partial class Form1 : Form
    {
 
        AutoAdaptWindowsSize autoAdaptSize;
        public Form1()
        {
            InitializeComponent();
            #region 窗体缩放
            autoAdaptSize = new AutoAdaptWindowsSize(this);
            autoAdaptSize.InitControlsInfo(this.Controls[]);
            #endregion
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
 
        }
        #region 窗体缩放      
 
        private void Form1_SizeChanged(object sender, EventArgs e)
        {
            if (autoAdaptSize != null)
            {
                autoAdaptSize.FormSizeChanged();
            }
        }
 
        #endregion
 
    }
}