Wpf MVVM，如何将 ImageSource 转换为字节数组

Question

这个问题在这里已经有了答案:





Convert System.Windows.Media.ImageSource to ByteArray

(1 个回答)



WPF Image to byte[]

(7 个回答)


4年前关闭。




在我的应用程序中，我从实时视频中拍摄快照，然后将其分配给 ImageSource，现在我想将 ImageSource 转换为字节 []

private ImageSource mSnapshotTaken;
    public ImageSource SnapshotTaken
    {
        get => mSnapshotTaken;
        set
        {
            if (value == null)
            {

            }
            else
            {
                mSnapshotTaken = value;

                // SnapshotToByte = mSnapshotTaken 


                OnPropertyChanged("SnapshotTaken");
            }
        }
    }
    public byte[] SnapshotToByte { get; set; }

Answer 1

试试这个:

您也可以使用其他编码器。

private ImageSource mSnapshotTaken;
public ImageSource SnapshotTaken
{
    get => mSnapshotTaken;
    set
    {
         mSnapshotTaken = value;
         SnapshotToByte = ImageSourceToBytes(mSnapshotTaken);
         OnPropertyChanged("SnapshotTaken");
         OnPropertyChanged("SnapshotToByte");
    }
}

public byte[] SnapshotToByte { get; set; }

public byte[] ImageSourceToBytes(ImageSource imageSource)
{
    byte[] bytes = null;
    var bitmapSource = imageSource as BitmapSource;

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

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

    return bytes;
}

引用: this & this