Winform 窗体自适应

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前言

在使用 Winform 开发过程中，经常发些因为显示器分辨率、窗体大小改变，控件却不能自适应变化，几经查找资料，和大佬的代码。经过细小修改，终于可以让窗体在外界影响下，窗体内背景图片、控件都会自适应变化大小（类似于网页的响应式）。

代码

完整代码如下：

using System;

using System.Drawing;

using System.Windows.Forms;

namespace AutoSizeForm

{

    public partial class FrmMain : Form

    {

        private float X;

        private float Y;

        public FrmMain()

        {

            InitializeComponent();

        }

        private void  SetTag(Control cons)

        {

            foreach (Control con in cons.Controls)

            {

                con.Tag = con.Width +":" + con.Height + ":" + con.Left + ":" + con.Top + ":" + con.Font.Size;

                if (con.Controls.Count > 0)

                    SetTag(con);

            }

        }

        private void SetControls(float newx, float newy, Control cons)

        {

            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]) * Math.Min(newx, newy);

                con.Font = new Font(con.Font.Name, currentSize, con.Font.Style, con.Font.Unit);

                if (con.Controls.Count > 0)

                {

                    SetControls(newx, newy, con);

                }

            }

        }

        //窗体Resize事件

        private void FrmMain_Resize(object sender, EventArgs e)

        {

            float newx = Width / X;

            float newy = Height / Y;

            SetControls(newx, newy, this);

            Text = Width.ToString() + " " + Height.ToString();

        }

        //窗体Load事件

        private void FrmMain_Load(object sender, EventArgs e)

        {

            Resize += new EventHandler(FrmMain_Resize);

            X = Width;

            Y = Height;

            SetTag(this);

            FrmMain_Resize(new object(), new EventArgs());//x,y可在实例化时赋值,最后这句是新加的，在MDI时有用

        }

    }

}