关于 数据库中 读写 Blob 字段的正确做法。

class BolbHelper
{
/// <summary>
/// 将图像转为二进制字节数组
/// </summary>
/// <param name="image"></param>
/// <returns></returns>
public static byte[] ImageToBinaryBytes(Image image)
{
byte[] result;
using (var ms = new MemoryStream())
{
image.Save(ms, ImageFormat.Bmp);
using(var br = new BinaryReader(ms))
{
ms.Seek(0, SeekOrigin.Begin);
result = br.ReadBytes((int)ms.Length);
br.Close();
}
ms.Close();
}
return result;
}

/// <summary>
/// 从二进制字节数组读取图像
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public static Image ImageFromBinaryBytes(byte[] data)
{
Image result;
using (var ms = new MemoryStream())
{
using(var bw = new BinaryWriter(ms))
{
bw.Write(data);
result = Image.FromStream(ms);
bw.Close();
}
ms.Close();
}
return result;
}
}