C# 在wpf中将字节数组转换为图像

我曾经

private BitmapImage byteArrayToImage(byte[] byteArrayIn)
{
    try
    {               
        MemoryStream stream = new MemoryStream();
        stream.Write(byteArrayIn, 0, byteArrayIn.Length);
        stream.Position = 0;
        System.Drawing.Image img = System.Drawing.Image.FromStream(stream);
        BitmapImage returnImage = new BitmapImage();
        returnImage.BeginInit();
        MemoryStream ms = new MemoryStream();
        img.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
        ms.Seek(0, SeekOrigin.Begin);
        returnImage.StreamSource = ms;
        returnImage.EndInit();

        return returnImage;
    }
    catch (Exception ex)
    {
        throw ex;
    }
    return null;
}

---

此方法在我的应用程序中用于将字节数组转换为图像。但它抛出“参数无效”异常。。为什么会发生。。？是否有其他方法。？？

嗨，这应该是可行的：

    private static BitmapImage LoadImage(byte[] imageData)
    {
        if (imageData == null || imageData.Length == 0) return null;
        var image = new BitmapImage();
        using (var mem = new MemoryStream(imageData))
        {
            mem.Position = 0;
            image.BeginInit();
            image.CreateOptions = BitmapCreateOptions.PreservePixelFormat;
            image.CacheOption = BitmapCacheOption.OnLoad;
            image.UriSource = null;
            image.StreamSource = mem;
            image.EndInit();
        }
        image.Freeze();
        return image;
    }

---

如果您有这样的数组：

byte[] byteArrayIn = new byte[] {255, 128, 0, 200};

你想要的是：

使用：

在xaml中：

<Image RenderOptions.BitmapScalingMode="NearestNeighbor" RenderOptions.EdgeMode="Aliased" x:Name="Image"></Image>   

/util.cs/

---

哪一行引发该异常？System.Drawing.Image img=System.Drawing.Image.FromStream（stream）；此代码引发上述异常…@BijoyKJose我知道这是很久以前的事了，但您是否找到了问题的解决方案

“未找到适合完成此操作的成像组件”

。我现在也遇到了同样的问题，我找不到任何解决方案。我修改了自己的代码片段，也使用了你的。。但在执行image.EndInit（）后，两者都抛出异常“未找到适合完成此操作的成像组件”；有什么解决方案吗？您的imageData集是什么？如果先将字节保存到流中，或者将图像文件的字节加载到内存中，则此方法有效-请参见此处：谢谢Carsten，您节省了我的时间：）您的答案节省了我的时间！简单易懂只是本质。在用像素格式和位图调色板胡闹了两个小时后，很有趣地看到这是多么容易。

<Image RenderOptions.BitmapScalingMode="NearestNeighbor" RenderOptions.EdgeMode="Aliased" x:Name="Image"></Image>   

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    private void btnBrowse_Click(object sender, RoutedEventArgs e)
    {
        var of = new OpenFileDialog();
        of.Filter = "Image files (*.png;*.jpeg)|*.png;*.jpeg|All files (*.*)|*.*";
        var res = of.ShowDialog();
        if (res.HasValue)
        {
            imgPreview.Source = new BitmapImage(new Uri(of.FileName));

            var t = Utils.ConvertBitmapSourceToByteArray(imgPreview.Source as BitmapSource);
            var d = Utils.ConvertBitmapSourceToByteArray(new BitmapImage(new Uri(of.FileName)));
            var s = Utils.ConvertBitmapSourceToByteArray(imgPreview.Source);
            var enc = Utils.ConvertBitmapSourceToByteArray(new PngBitmapEncoder(), imgPreview.Source);
            //imgPreview2.Source = Utils.ConvertByteArrayToBitmapImage(enc);
            imgPreview2.Source = Utils.ConvertByteArrayToBitmapImage2(enc);
            //var i = 0;


        }
        else
        {
            MessageBox.Show("Select a currect file...");

        }
    }

}

public class Utils
{
    public static byte[] ConvertBitmapSourceToByteArray(BitmapEncoder encoder, ImageSource imageSource)
    {
        byte[] bytes = null;
        var bitmapSource = imageSource as BitmapSource;

        if (bitmapSource != null)
        {
            encoder.Frames.Add(BitmapFrame.Create(bitmapSource));

            using (var stream = new MemoryStream())
            {
                encoder.Save(stream);
                bytes = stream.ToArray();
            }
        }

        return bytes;
    }

    public static byte[] ConvertBitmapSourceToByteArray(BitmapSource image)
    {
        byte[] data;
        BitmapEncoder encoder = new JpegBitmapEncoder();
        encoder.Frames.Add(BitmapFrame.Create(image));
        using (MemoryStream ms = new MemoryStream())
        {
            encoder.Save(ms);
            data = ms.ToArray();
        }
        return data;
    }
    public static byte[] ConvertBitmapSourceToByteArray(ImageSource imageSource)
    {
        var image = imageSource as BitmapSource;
        byte[] data;
        BitmapEncoder encoder = new JpegBitmapEncoder();
        encoder.Frames.Add(BitmapFrame.Create(image));
        using (MemoryStream ms = new MemoryStream())
        {
            encoder.Save(ms);
            data = ms.ToArray();
        }
        return data;
    }
    public static byte[] ConvertBitmapSourceToByteArray(Uri uri)
    {
        var image = new BitmapImage(uri);
        byte[] data;
        BitmapEncoder encoder = new JpegBitmapEncoder();
        encoder.Frames.Add(BitmapFrame.Create(image));
        using (MemoryStream ms = new MemoryStream())
        {
            encoder.Save(ms);
            data = ms.ToArray();
        }
        return data;
    }
    public static byte[] ConvertBitmapSourceToByteArray(string filepath)
    {
        var image = new BitmapImage(new Uri(filepath));
        byte[] data;
        BitmapEncoder encoder = new JpegBitmapEncoder();
        encoder.Frames.Add(BitmapFrame.Create(image));
        using (MemoryStream ms = new MemoryStream())
        {
            encoder.Save(ms);
            data = ms.ToArray();
        }
        return data;
    }

    public static BitmapImage ConvertByteArrayToBitmapImage(Byte[] bytes)
    {
        var stream = new MemoryStream(bytes);
        stream.Seek(0, SeekOrigin.Begin);
        var image = new BitmapImage();
        image.BeginInit();
        image.StreamSource = stream;
        image.EndInit();
        return image;
    }
}