#region "字符串图片转换"

/// <summary>
/// 将Base64转成图片
/// </summary>
/// <param name="str">Base64字符串</param>
/// <returns>图片</returns>
/// <remarks></remarks>
public static Image StrToImage(string str)
{
    if (str.Length == 0) {
        return null;
    }
    byte[] bs = Convert.FromBase64String(str);
    System.IO.Stream stream = new System.IO.MemoryStream(bs);
    System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(stream);
    return bmp;
}

/// <summary>
/// 将图片转成Base64字符串
/// </summary>
/// <param name="image">图片</param>
/// <returns>Base64字符串</returns>
/// <remarks></remarks>
public static string ImageToStr(Image image)
{
    if (image == null) {
        return "";
    }
    byte[] resByte = null;
    dynamic MemoryStream = new System.IO.MemoryStream();
    image.Save(MemoryStream, System.Drawing.Imaging.ImageFormat.Png);
    resByte = MemoryStream.GetBuffer();
    //取内存流数据 
    return Convert.ToBase64String(resByte);
}

#endregion