Update Form1.cs

LEIRONGHUA · web-flow · commit 0201392156f2 · 2023-03-12T20:38:53.000+08:00
修复使用数字证书加盖甲方的印章后，再用加盖后的PDF文件再加盖乙方的印章，也使用数字证书时，会提示“字段已被使用”的错误
diff --git a/PDFQFZ/Form1.cs b/PDFQFZ/Form1.cs
@@ -635,7 +635,7 @@ private bool PDFWatermark(string inputfilepath, string outputfilepath)
                             //signatureAppearance.Layer2Text = text;
 
                             float bk = 2;//数字签名的图片要加上边框才能跟普通印章的位置完全一致
-                            signatureAppearance.SetVisibleSignature(new iTextSharp.text.Rectangle(xPos- bk, yPos- bk, xPos + imgW + bk, yPos + imgH + bk), signpage, "Signature");
+                            signatureAppearance.SetVisibleSignature(new iTextSharp.text.Rectangle(xPos- bk, yPos- bk, xPos + imgW + bk, yPos + imgH + bk), signpage, null);
                         }
 
                         MakeSignature.SignDetached(signatureAppearance, externalSignature, chain, null, null, null, 0, CryptoStandard.CMS);

Original file line number	Diff line number	Diff line change
`@@ -635,7 +635,7 @@ private bool PDFWatermark(string inputfilepath, string outputfilepath)`
`635`	`635`	`//signatureAppearance.Layer2Text = text;`
`636`	`636`
`637`	`637`	`float bk = 2;//数字签名的图片要加上边框才能跟普通印章的位置完全一致`
`638`		`- signatureAppearance.SetVisibleSignature(new iTextSharp.text.Rectangle(xPos- bk, yPos- bk, xPos + imgW + bk, yPos + imgH + bk), signpage, "Signature");`
	`638`	`+ signatureAppearance.SetVisibleSignature(new iTextSharp.text.Rectangle(xPos- bk, yPos- bk, xPos + imgW + bk, yPos + imgH + bk), signpage, null);`
`639`	`639`	`}`
`640`	`640`
`641`	`641`	`MakeSignature.SignDetached(signatureAppearance, externalSignature, chain, null, null, null, 0, CryptoStandard.CMS);`