Microsoft Dynamics Business Central中[Tenant Media]表图片读取与镜像疑问

• Tenant Media表的Content字段内容未加密，而是通过DEFLATE压缩算法进行了压缩处理
• 将该字段读取为byte[]后，只需通过DEFLATE解压即可还原出原始图片的二进制数据，能正常获取有效图片

C#解压示例代码 #

using System.IO;
using System.IO.Compression;

public byte[] GetOriginalImageBytes(byte[] compressedContent)
{
    using var inputMs = new MemoryStream(compressedContent);
    // 跳过DEFLATE格式的前2字节标识
    inputMs.ReadByte();
    inputMs.ReadByte();
    
    using var deflateStream = new DeflateStream(inputMs, CompressionMode.Decompress);
    using var outputMs = new MemoryStream();
    
    deflateStream.CopyTo(outputMs);
    return outputMs.ToArray();
}

内容的提问来源于stack exchange，提问作者pepr