将以db中的图像形式存储的签名添加到pdf中 [英] Add a signature which is stored as image in db to a pdf

问题描述

伙计们，



我有一个场景，我需要将存储在db中的签名（图像文件）添加到PDF中，该PDF也存在于同一个数据库中在另一张桌子上。



现在只需点击一下按钮即可完成多次。



喜欢，通过复选框将相同的签名图像添加到上面网格中选择的多个PDF文件。



我再次需要保存（更新）更新的PDF同一个数据库中同一个表中有签名的文件。



我需要 - 在特定位置（在最后一页）将签名保存到PDF中并保存回来到db。



请帮帮我们。





谢谢!!

Sam

Guys,

I have a scenario where in I need to add a signature (image file) stored in db to a PDF which is also present in same db in a different table.

Now this is to be done for multiple times on a single button click.

Like , adding the same signature image to multiple PDF files selected in the grid above via a check box.

I again need to save (update )that updated PDF file with signature in the same table in same db.

I need - Saving a signature into a PDF at a particular position (in the last page) and saving it back to db.

Please help guys.


Thanks!!
Sam

推荐答案

您可以使用iTextSharp。

这样的东西可能适合你：

You can use iTextSharp.
Something like this might work for you:

PdfReader pdfReader = null;
PdfStamper pdfStamper = null;

// Open the PDF file to be signed
pdfReader = new PdfReader(this.signFile.FullName);

// Output stream to write the stamped PDF to
using (FileStream outStream = new FileStream(targetFilename, FileMode.Create))
{
  try
  {
    // Stamper to stamp the PDF with a signature
    pdfStamper = new PdfStamper(pdfReader, outStream);

    // Load signature image
    iTextSharp.text.Image sigImg = iTextSharp.text.Image.GetInstance(SIGNATURE_IMAGE_PATH);

    // Scale image to fit
    sigImg.ScaleToFit(MAX_WIDTH, MAX_HEIGHT);

    // Set signature position on page
    sigImg.SetAbsolutePosition(POS_X, POS_X);

    // Add signatures to desired page
    PdfContentByte over = pdfStamper.GetOverContent(PAGE_NUM_TO_SIGN);
    over.AddImage(sigImg);
  }
  finally
  {
    // Clean up
    if (pdfStamper != null)
      pdfStamper.Close();

    if (pdfReader != null)
      pdfReader.Close();
  }
}

干杯，

Edo

Cheers,
Edo

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