C#项目完成PDF文件增加印章操作可指定印章位置

/// <summary>
        /// 添加图片印章
        /// </summary>
        /// <param name="pdfPath">PDF文件路径</param>
        /// <param name="imgUrl">印章图片路径</param>
        /// <param name="x">印章位置X</param>
        /// <param name="y">印章位置Y</param>
        private void AddImage(string pdfPath, string imgUrl, float x, float y)
        {
            //新建PDF文档，添加一页
            PdfDocument doc = new PdfDocument();
            doc.LoadFromFile(pdfPath);
            //pdf文件页数
            int pdfCount = doc.Pages.Count;
            //默认操作第一页
            PdfPageBase page = doc.Pages[0];
            //获取页面宽
            float pageWidth = page.ActualSize.Width;
            //获取页面高
            float pageHeight = page.ActualSize.Height;

            //加载图片到Image对象
            //System.Drawing.Image image = System.Drawing.Image.FromFile("E:/csmodel/model/957.png");
            PdfImage image = PdfImage.FromFile(imgUrl);

            //调整图片大小
            //int width = image.Width;
            //int height = image.Height;
            //float scale = 0.1f;  //缩放比例
            //Size size = new Size((int)(width * scale), (int)(height * scale));
            //Bitmap scaledImage = new Bitmap(image, size);
            ////加载缩放后的图片到PdfImage对象
            //PdfImage pdfImage = PdfImage.FromImage(scaledImage);

            //设置图片位置
            //float x = 0f;
            //float y = 50f;

            //在指定位置绘入图片
            page.Canvas.DrawImage(image, x, y);

            //保存文档
            doc.SaveToFile(pdfPath);
        }