C#winform 窗體縮放自適應

1.  首先在窗體上放上一個Panel容器，並將容器的Dock屬性設為Fill，即所有的控件都放在了這個容器里。

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApp2
{
    class AutoAdaptWindowsSize
    {
        double formOriginalWidth;//窗體原始寬度
        double formOriginalHeight;//窗體原始高度
        double scaleX;//水平縮放比例
        double scaleY;//垂直縮放比例
        Dictionary<string, string> ControlsInfo = new Dictionary<string, string>();//控件中心Left,Top,控件Width,控件Height,控件字體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)//獲取窗體的高度和寬度
            {
                formOriginalWidth = Convert.ToDouble(ctrlContainer.Width);
                formOriginalHeight = Convert.ToDouble(ctrlContainer.Height);
            }
            foreach (Control item in ctrlContainer.Controls)
            {
                if (item.Name.Trim() != "")
                {
                    //添加信息：鍵值：控件名，內容：據左邊距離，距頂部距離，控件寬度，控件高度，控件字體。
                    ControlsInfo.Add(item.Name, (item.Left + item.Width / 2) + "," + (item.Top + item.Height / 2) + "," + item.Width + "," + item.Height + "," + item.Font.Size);
                }
                if ((item as UserControl) == null && item.Controls.Count > 0)
                {
                    InitControlsInfo(item);
                }
            }

        }

        public void FormSizeChanged()
        {
            if (ControlsInfo.Count > 0)//如果字典中有數據，即窗體改變
            {
                ControlsZoomScale(_form.Controls[0]);//表示pannel控件
                ControlsChange(_form.Controls[0]);

            }
        }
        private void ControlsZoomScale(Control ctrlContainer)
        {
            scaleX = (Convert.ToDouble(ctrlContainer.Width) / formOriginalWidth);
            scaleY = (Convert.ToDouble(ctrlContainer.Height) / formOriginalHeight);
        }

        /// <summary>
        /// 改變控件大小
        /// </summary>
        /// <param name="ctrlContainer"></param>
        private void ControlsChange(Control ctrlContainer)
        {
            double[] pos = new double[5];//pos數組保存當前控件中心Left,Top,控件Width,控件Height,控件字體Size
            foreach (Control item in ctrlContainer.Controls)//遍歷控件
            {
                if (item.Name.Trim() != "")//如果控件名不是空，則執行
                {
                    if ((item as UserControl) == null && item.Controls.Count > 0)//如果不是自定義控件
                    {
                        ControlsChange(item);//循環執行
                    }
                    string[] strs = ControlsInfo[item.Name].Split(',');//從字典中查出的數據，以‘，’分割成字符串組

                    for (int i = 0; i < 5; i++)
                    {
                        pos[i] = Convert.ToDouble(strs[i]);//添加到臨時數組
                    }
                    double itemWidth = pos[2] * scaleX;     //計算控件寬度，double類型
                    double itemHeight = pos[3] * scaleY;    //計算控件高度
                    item.Left = Convert.ToInt32(pos[0] * scaleX - itemWidth / 2);//計算控件距離左邊距離
                    item.Top = Convert.ToInt32(pos[1] * scaleY - itemHeight / 2);//計算控件距離頂部距離
                    item.Width = Convert.ToInt32(itemWidth);//控件寬度，int類型
                    item.Height = Convert.ToInt32(itemHeight);//控件高度
                    item.Font = new Font(item.Font.Name, float.Parse((pos[4] * Math.Min(scaleX, scaleY)).ToString()));//字體

                }
            }

        }


    }
}

 

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 窗體縮放
            autoAdaptSize = new AutoAdaptWindowsSize(this);
            autoAdaptSize.InitControlsInfo(this.Controls[0]);
            #endregion
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
        #region 窗體縮放      
       
        private void Form1_SizeChanged(object sender, EventArgs e)
        {
            if (autoAdaptSize != null)
            {
                autoAdaptSize.FormSizeChanged();
            }
        }

        #endregion

      
    }
}