public async void SpireChange(string url)
{
//url = "https://openapi.bestsign.info/openapi/v2/storage/contract/download/?developerId=1552635811012161536&rtick=15879806269530&signType=rsa&sign=QIAwfvzYdj2VyEZiPQq10TkDhxxwnBPZQzuvfjSeER9qNcuff6fp6zI34UrnRyM8FQURyRaEt98H37Ntnccdv12SZ0KN1CRu1w3%2F0EODcZVfUMFucotHOGgoAagBHrZQS6Zc9rvDWaNazYQFRW8hYS3XnmDaQkCqSJ%2FOt%2BRqcNVX8hvyZkYqSuU6GDz7JbtdKV%2B2glUfGJyeNPQcLuzTFTqrLGwOIwRrela6f0CafNkwfpOURvkiTUgf0Hd4Gt5OXw22%2FL2EDYvEaXlIjyastkGc2WXLcNGMnTAk7HTKfULcmEFyBzVKYeuvhAt6pCDW01M7kQQPXi%2Fi6KA5KhZ%2F%2Bw%3D%3D&contractId=158797930501000001";
url = "https://openapi.bestsign.info/openapi/v2/storage/contract/download/?developerId=1552635811012161536&rtick=15895128046650&signType=rsa&sign=Gh6GoWVXqfB%2FvGSn1TcXKfr%2Fjl4TdaQggmDSLfDHaUoduJXvns1r7ZlVFi9Q2HVtipuSiqYl0DnfTSoRDdd42LQOgB9BL56N9UJXB0D8tK4u3CZd7xtNCi%2Fwr%2BeyXi%2FvaiupJeIZnaXGL1rfsE%2BowLGJyFmbBhnpWMZze9v2Q3rXm49YvXrVZam0yYXU56v3UfLAwZh1zwGj5mVbLgW1UMAqfLRJnP%2FJVfRJZQrJ7Zl1uQxgZGRQjjilghbijTkA3Z3%2Fy9I1fV4JCW7QPbciBFyrg7wXFSAnKnuqGPbBRXsQpxdEdYYRAyw4H%2Be3kOE1ccOoROpxH%2Bc7qEiJRdVgkA%3D%3D&contractId=158797930501000001";
//加载文档
Spire.Pdf.PdfDocument doc = new Spire.Pdf.PdfDocument();
byte[] buffer = await GetStream(url);
doc.LoadFromBytes(buffer);
StringBuilder str = new StringBuilder();
List <Image> ListImage = new List <Image>();
foreach (PdfPageBase page in doc.Pages)
{
// 获取所有pages里面的图片
Image[] images = page.ExtractImages();
if (images != null && images.Length > 0)
{
ListImage.AddRange(images);
}
str.Append(page.ExtractText().Replace("Evaluation Warning : The document was created with Spire.PDF for .NET.", ""));
/*PdfTextFind[] result = page.FindText("使用人确认签字", TextFindParameter.None).Finds;
* foreach (PdfTextFind text in result)
* {
* //获取文字的坐标，宽度和高度
* PointF pf = text.Position;
* SizeF size = text.Size;
* pf.X = pf.X;
* pf.Y = pf.Y;
* str.Append(pf + " size：" + size + Environment.NewLine);
* }*/
}
// 将提取到的图片保存到本地路径
//if (ListImage.Count > 0)
{
for (int i = 0; i < ListImage.Count; i++)
{
Image image = ListImage[i];
image.Save("image" + (i + 1).ToString() + ".png", System.Drawing.Imaging.ImageFormat.Png);
}
}
doc.SaveToFile("PDF.html", FileFormat.HTML);
doc.SaveToFile("下载.pdf", FileFormat.PDF);
this.richTextBox1.Text = str.ToString();
}
