等比例

public static 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);   //如果此控件存在子控件，则此控件的子控件执行此函数一次
            }
        }

        public static void setControls(float newx, float newy, Control cons)
        {
            foreach (Control con in cons.Controls)
            {
                if (con.Tag == null) continue;
                string[] myTag = con.Tag.ToString().Split(new char[] { ':' }); //将con的宽、高、左边距、顶边距离及字体大小通过字符“:”分割成数组
                float a = Convert.ToSingle(myTag[0]) * newx;    //根据窗口的缩放比例确定控件相应的值，宽度
                con.Width = (int)a;
                a = Convert.ToSingle(myTag[1]) * newy;    //高度
                con.Height = (int)a;
                a = Convert.ToSingle(myTag[2]) * newx;    //左边距
                con.Left = (int)a;
                a = Convert.ToSingle(myTag[3]) * newy;    //顶边距离
                con.Top = (int)a;
                Single currentSize = Convert.ToSingle(myTag[4]) * newy;     //字体大小
                con.Font = new Font(con.Font.Name, currentSize, con.Font.Style, con.Font.Unit); ;
                if (con.Controls.Count > 0) setControls(newx, newy, con);     //如果此控件存在子控件，则将相应子控件执行一次setControls函数
            }
        }

　　

        float X;  //默认窗口的宽度
        float Y;  //默认窗口的高度

        private void FrmMain_Load(object sender, EventArgs e)
        {
            X = this.Width;   //将窗体的宽度赋值给X
            Y = this.Height;   //将窗体的高度赋值给Y
            Wode.setTag(this);   //调用setTag函数
            this.Resize += new EventHandler(FrmMain_Resize);//窗体调整大小时引发事件 
        }

        //网上的不知道为什么
        private void FrmMain_Resize(object sender, EventArgs e)
        {
            float newx = (this.Width) / X;   //窗体宽度缩放比例
            float newy = (this.Height) / Y;   //窗体高度缩放比例
            Wode.setControls(newx, newy, this);   //调用setControls函数
        }