PROSAGA码农传奇-数字签名-使用itextsharp在数字签名中的边框

使用itextsharp在数字签名中的边框

作者: ⑩Ⅵ嵗Ｄ夨憶
发布时间: 2024-12-30 06:25:38 (5天前)
转自：

<div class =“post-text”itemprop =“text”>
  <P>
    当您使用iText 5.5.x签署PDF时，通常会执行类似的操作
  </p>
   <pre>
    <code>
      // Creating the reader and the stamper
PdfReader reader = new PdfReader(SRC);
FileStream os = new FileStream(DEST, FileMode.Create);
PdfStamper stamper = PdfStamper.CreateSignature(reader, os, '\0');

// Creating the appearance
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
appearance.Reason = "Test customized appearance";
appearance.Location = "Singularity";
appearance.SetVisibleSignature(new Rectangle(36, 748, 144, 780), 1, "sig");

// Creating the signature
IExternalSignature pks = new PrivateKeySignature(parameters, DigestAlgorithms.SHA256);
MakeSignature.SignDetached(appearance, pks, chain, null, null, null, 0, CryptoStandard.CADES);

</code>
  </pre>
  <P>
    您可以通过在图层模板之后处理图层模板来自由地自定义视觉外观
     <code>
      appearance.SetVisibleSignature
    </code>
     电话，例如像这样：
  </p>
   <pre>
    <code>
      // trigger creation of default layers contents
appearance.GetAppearance();

// Customize the layer contents
PdfTemplate layer2 = appearance.GetLayer(2);
Rectangle rect = appearance.Rect;
layer2.SetRGBColorStroke(255, 0, 0);
layer2.SetLineWidth(2);
layer2.Rectangle(rect.Left, rect.Bottom, rect.Width, rect.Height);
layer2.Stroke();

</code>
  </pre>
  <P>
    沿着签名外观边框绘制一条红线
  </p>
</DIV>