MainWindow.xaml.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Drawing;
using System.Runtime.InteropServices;

namespace Imageviewer
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        private System.Windows.Point origin;
        private System.Windows.Point start;
        Bitmap bitmap;
        public MainWindow()
        {
            InitializeComponent();
            bitmap = new Bitmap(Environment.CurrentDirectory+"\\a.jpg");
        }
        // 下载于www.51aspx.com

        private void Grid_MouseWheel(object sender, MouseWheelEventArgs e)
        {
            ChangImgSize(e.Delta > 0);
        }

        private void image1_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            if (image1.IsMouseCaptured) return;
            image1.CaptureMouse();
            start = e.GetPosition(this);
            origin.X = image1.RenderTransform.Value.OffsetX;
            origin.Y = image1.RenderTransform.Value.OffsetY;
            e.Handled = true;
        }

        private void image1_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            image1.ReleaseMouseCapture();
        }

        private void image1_MouseMove(object sender, MouseEventArgs e)
        {
            if (!image1.IsMouseCaptured) return;
            System.Windows.Point point = e.MouseDevice.GetPosition(this);
            Matrix m = image1.RenderTransform.Value;
            m.OffsetX = origin.X + (point.X - start.X);
            m.OffsetY = origin.Y + (point.Y - start.Y);