将bitmapimage上传到memorystream并从memorystream加载到image.source

Question

我刚刚开始学习wpf绑定。所以我非常菜鸟

我尝试将图像上传到memorystream中，进行旋转，然后再从memorystream中读取它，然后像绑定？！？一样加载到image.source中。

我找到了一些代码，尝试将它们放在一起但没有成功 我不完全知道我需要成功

mainWindow

<Window.Resources>
        <local:Imgcls x:Key="imgcls" />
        <!--<local:ByteToImageConverter x:Name="binaryConverter" x:Key="byteToImageConverter"/>-->
    </Window.Resources>

    <Grid>
        <DockPanel Height="28" VerticalAlignment="Top">

        </DockPanel>
        <DockPanel Height="360">
            <Grid Width="400" Margin="10">
                <StackPanel>
                    <Button Content="load" Height="50" Click="Btn_Load_Click"/>
                    <Button Content="open" Height="50" Click="Btn_Open_Click"/>
                    <Button Content="rotate"  Height="50" Click="Btn_Rotate_Click"/>
                </StackPanel>
            </Grid>
            <Grid Width="360">
                <Border BorderBrush="Black" BorderThickness="1">
                    <Image x:Name="img_box" Margin="5,5,5,5" Stretch="Uniform"
                           Source="{Binding UriImg ,Source={StaticResource imgcls}}" />
                </Border>
            </Grid>
        </DockPanel>
        <DockPanel Height="28" VerticalAlignment="Bottom">

        </DockPanel>
    </Grid>

Imgcls.cs

    public class Imgcls : INotifyPropertyChanged
    {
        public Imgcls()
        {
            UriImg = new Uri("pack://application:,,,/img/pic.png", UriKind.Absolute);
        }

        private Uri uri_img;        

        public Uri UriImg
        {
            get {return uri_img;}
            set { uri_img = value; }
        }

        private byte[] byteimg;

        public byte[] ByteImg
        {
            get { return byteimg; }
            set { byteimg = value; }
        }

        public event PropertyChangedEventHandler PropertyChanged;
        private void Notify(string PropertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(PropertyName));
        }
    }

    public class ByteToImageConverter : IValueConverter
    {
        public BitmapImage ConvertImgToByte(Uri source)
        {
            var img = new BitmapImage();
            img.BeginInit();
            img.UriSource = source;
            img.CacheOption = BitmapCacheOption.OnLoad;
            //img.CreateOptions = BitmapCreateOptions.IgnoreImageCache;
            img.EndInit();
            return img;

        }
        public BitmapImage ConvertByteToImg(byte[] imgByteArray)
        {
            MemoryStream stream = new MemoryStream(imgByteArray);
            BitmapImage img = new BitmapImage();
            img.BeginInit();
            img.StreamSource = stream;
            img.EndInit();
            return img;
        }
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            BitmapImage img = new BitmapImage();
            if (value != null)
            {
                img = ConvertImgToByte(value as Uri);
            }
            return img;
        }
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            BitmapImage img = new BitmapImage();
            if (value != null)
            {
                img = ConvertByteToImg(value as byte[]);
            }
            return img;
        }

    }

mainwindow.xaml.cs

    //private double rotation = 0;
        //BitmapImage source = new BitmapImage(new Uri(Uri_img));


        public MainWindow()
        {
            InitializeComponent();

        }


        private void Btn_Load_Click(object sender, RoutedEventArgs e)
        {
            ByteToImageConverter bi = new ByteToImageConverter();
            bi.ConvertImgToByte(new Uri(@"d:\Picture\images.png"));
        }
        private void Btn_Open_Click(object sender, RoutedEventArgs e)
        {
            ByteToImageConverter bi = new ByteToImageConverter();
            //bi.ConvertByteToImg(Imgbyte);
        }

        private void Btn_Rotate_Click(object sender, RoutedEventArgs e)
        {
            //rotation += 90;
            //img_box.Source =  new TransformedBitmap(source, new RotateTransform(rotation));
        }

我尝试旋转内存流中的图像，反转等，并从内存流中绑定img_box.source