AIKKEY_WPFWin7/AIK.Views/Converters/ByteArrayToImageSourceConverter.cs

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Data;
using System.Windows.Media.Imaging;

namespace AIK.Views.Converters
{
    public class ByteArrayToImageSourceConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is not byte[] bytes || bytes.Length == 0)
                return null;

            try
            {
                using var stream = new MemoryStream(bytes);
                var image = new BitmapImage();
                image.BeginInit();
                image.StreamSource = stream;
                image.CacheOption = BitmapCacheOption.OnLoad; // 避免流关闭后图像失效
                image.EndInit();
                image.Freeze(); // 允许跨线程使用（可选但推荐）
                return image;
            }
            catch
            {
                return null; // 或返回默认占位图
            }
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}