将图片地址写以二进制写到文档里

public static void SaveImageToFile(Image image, string filePath, ImageFormat format)
    {
        // Ensure the quality parameter is valid.
        if ((quality < 0) || (quality > 100))
        {
            throw new ArgumentOutOfRangeException("quality", "The quality parameter must be between 0 and 100.");
        }

        // Create an image encoder for this format.
        ImageCodecInfo codec = ImageCodecInfo.GetImageEncoders().First(c => c.FormatID == format.Guid);

        // Create an Encoder object based on the GUID
        // for the Quality parameter category.
        Encoder encoder = Encoder.Quality;

        // Create an EncoderParameters object.
        // An EncoderParameters object has an array of EncoderParameter
        // objects. In this case, there is only one
        // EncoderParameter object in the array.
        EncoderParameters encoderParameters = new EncoderParameters(1);

        EncoderParameter encoderParameter = new EncoderParameter(encoder, quality);
        encoderParameters.Param[0