private void ShowSelectedPicture(string path)

    {

            FileStream fs = File.OpenRead(path); //OpenRead

            int filelength = ;

            filelength = (int)fs.Length; //获得文件长度

            Byte[] image = new Byte[filelength]; //建立一个字节数组

            BitmapImage bitmapImage = new BitmapImage();

            bitmapImage.BeginInit();

            bitmapImage.StreamSource =new MemoryStream(image );

            bitmapImage.EndInit();

            var pictureWindow = new PictureWindow();//自己创建的窗口

            pictureWindow.myImage.Source = bitmapImage;//myImage窗口中的图片空间

            //pictureWindow.myImage.Width = bitmapImage.PixelWidth;

            //pictureWindow.myImage.Height = bitmapImage.PixelHeight;

            pictureWindow.WindowStartupLocation = WindowStartupLocation.CenterScreen;

            pictureWindow.ShowDialog();

   }

private void MyImage_OnMouseWheel(object sender, MouseWheelEventArgs e)
    {
         double ScaleX = 0;
         double ScaleY = 0;
         double dbl_ZoomX = ((ScaleTransform)(((TransformGroup)(((UIElement)(this.myImage)).RenderTransform)).Children[0])).ScaleX;
         double dbl_ZoomY = ((ScaleTransform)(((TransformGroup)(((UIElement)(this.myImage)).RenderTransform)).Children[0])).ScaleY;
        ((ScaleTransform)(((TransformGroup)(((UIElement)(this.myImage)).RenderTransform)).Children[0])).CenterX = e.GetPosition(this.myImage).X;
        ((ScaleTransform)(((TransformGroup)(((UIElement)(this.myImage)).RenderTransform)).Children[0])).CenterY = e.GetPosition(this.myImage).Y;

if (e.Delta < 0)
       {
          ScaleX = dbl_ZoomX - 0.1 < 0.2 ? 0.1 : dbl_ZoomX - 0.1;
          ScaleY = dbl_ZoomY - 0.1 < 0.2 ? 0.1 : dbl_ZoomY - 0.1;
       }
     else if (e.Delta > 0)
     {
        ScaleX = dbl_ZoomX + 0.1 > 10.0 ? 10.0 : dbl_ZoomX + 0.1;
        ScaleY = dbl_ZoomY + 0.1 > 10.0 ? 10.0 : dbl_ZoomY + 0.1;
     }

((ScaleTransform)(((TransformGroup)(((UIElement)(this.myImage)).RenderTransform)).Children[0])).ScaleX = ScaleX;
       ((ScaleTransform)(((TransformGroup)(((UIElement)(this.myImage)).RenderTransform)).Children[0])).ScaleY = ScaleY;
    }

 private void UploadImage(string Path)

      {

            FileStream fullfs;

            string pictureName = GetPictureName();

            string pictureFullPath = storePath;// GetPicturePath(rtdto.BusinessIndex, rtdto.ProviderIndex);

            string pictureFullName = pictureFullPath + @"\" + pictureName;

            fullfs = new FileStream(pictureFullName, FileMode.Create);

            BinaryWriter fullbw = new BinaryWriter(fullfs);

            fullbw.Write(pidto.PictureData);

            fullbw.Close();

            fullfs.Close();

      }

  private string GetPicturePath(int businessindex, int providerindex)

        {

            string currentPath = AppDomain.CurrentDomain.BaseDirectory + @"\Image";

            if (!System.IO.Directory.Exists(currentPath))

            {

                try

                {

                    System.IO.Directory.CreateDirectory(currentPath);

                }

                catch

                {

                    currentPath = AppDomain.CurrentDomain.BaseDirectory;//创建目录失败，存入根目录中

                }

            }

            string filePath = currentPath + @"\" + businessindex + "_" + providerindex;

            if (!System.IO.Directory.Exists(filePath))

            {

                try

                {

                    System.IO.Directory.CreateDirectory(filePath);

                }

                catch

                {

                    filePath = currentPath;//创建目录失败，存入根目录中

                }

            }

            return filePath;

        }

        private string GetPictureName()

        {

            string imageGuid = Guid.NewGuid().ToString() + ".jpg";

            return imageGuid;

        }

<Window x:Class="App.Modules.PictureWindow"

                    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

                    xmlns:uiControls="clr-namespace:Allegion.Components.UIControls;assembly=Allegion.Components.UIControls"

                    Title="PictureWindow">

    <ScrollViewer x:Name="scrollViewer"

                  HorizontalScrollBarVisibility="Auto"

                  MouseWheel="ScrollViewer_OnMouseWheel"

                  VerticalScrollBarVisibility="Auto">

        <Image Name="myImage" MouseWheel="MyImage_OnMouseWheel">

            <Image.RenderTransform>

                <TransformGroup>

                    <ScaleTransform ScaleX="" ScaleY="" />

                    <SkewTransform />

                    <RotateTransform />

                    <TranslateTransform />

                </TransformGroup>

            </Image.RenderTransform>

        </Image>

    </ScrollViewer>

</Window>