图片的放大和缩小

点击放大，图片变大，点击缩小，图片缩小

 

代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
using DevExpress.XtraEditors;
using Com.HuaQin.DBHelper;
using System.Drawing;
using System.Drawing.Imaging;
using System.Reflection;

namespace Com.HuaQin.WKStationPlugin
{
    public partial class xFrmQueryChild : DevExpress.XtraEditors.XtraForm
    {
        private Image myBitmap;
        Point op, np;
        Picture pic;
        myPoint mousePoint = new myPoint();
        Boolean flag = true;
        Boolean mouseDown;
        Shift sft = new Shift();
        int scale =1;
        public xFrmQueryChild(Image bit)
        {
            InitializeComponent();
            pictureEdit1.Image = bit;
            //pictureBox1.Image = bit;
            
            //this.pictureBox1.Image = myBitmap;
            //pic = new Picture(bit, pictureBox1);
            //pictureEdit1.ContextMenu = GetMenu(pictureEdit1);
        }

        private void toolStripButton2_Click(object sender, EventArgs e)
        {
            //InvokeMenuMethod(GetMenu(pictureEdit1) ,"zoomTo");
            //
        }

        private DevExpress.XtraEditors.Controls.PictureMenu GetMenu(DevExpress.XtraEditors.PictureEdit edit)
        {
            PropertyInfo pi = typeof(DevExpress.XtraEditors.PictureEdit).GetProperty("Menu", BindingFlags.NonPublic | BindingFlags.Instance);
            if (pi != null)
                return pi.GetValue(edit, null) as DevExpress.XtraEditors.Controls.PictureMenu;
            return null;
        }
        private void InvokeMenuMethod(DevExpress.XtraEditors.Controls.PictureMenu menu, string name)
        {
            MethodInfo mi = typeof(DevExpress.XtraEditors.Controls.PictureMenu).GetMethod(name, BindingFlags.NonPublic | BindingFlags.Instance);
            if (mi != null && menu != null)
                mi.Invoke(menu, new object[] { menu, new EventArgs() });
        }

        private void barButtonItem1_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
        {
            var menu = GetMenu(pictureEdit1);
            InvokeMenuMethod(menu, "OnZoomIn");
            //"OnZoomOut"
        }

        private void barButtonItem2_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
        {
            var menu = GetMenu(pictureEdit1);
            InvokeMenuMethod(menu, "OnZoomOut");
        }
       
    }
}