我正在使用itextSharp填写PDF上的一些字段。我需要能够将一系列PDF组合到一个批处理PDF文件中。在下面,我正在通过SQL结果集进行循环,并以与当前记录相对应的值填充了PDF的字段,将其存储为字节数组,并将所有这些数组整合到字节数组列表中。然后,我试图将该列表中的每个字节数组合并到一个字节数组中,并将其作为PDF将其作为用户。
它似乎可以工作,生成一个包含我结果集的单个页面的单个文件,但每个页面上的所有字段都空白。使用FillForm()使用单个PDF时,它可以按预期工作。我在做什么错?
byte[] pdfByteArray = new byte[0];
List<byte[]> pdfByteArrayList = new List<byte[]>();
byte[] pdfByteArrayItem = new byte[0];
foreach (DataRow row in results.Rows)
{
certNum = row[1].ToString();
certName = row[2].ToString();
certDate = row[3].ToString();
pdfByteArrayItem = FillForm(certType, certName, certNum, certDate);
pdfByteArrayList.Add(pdfByteArrayItem);
}
using (var ms = new MemoryStream()) {
using (var doc = new Document()) {
using (var copy = new PdfSmartCopy(doc, ms)) {
doc.Open();
//Loop through each byte array
foreach (var p in pdfByteArrayList) {
//Create a PdfReader bound to that byte array
using (var reader = new PdfReader(p)) {
//Add the entire document instead of page-by-page
copy.AddDocument(reader);
}
}
doc.Close();
}
}
pdfByteArray = ms.ToArray();
context.Response.ContentType = "application/pdf";
context.Response.BinaryWrite(pdfByteArray);
context.Response.Flush();
context.Response.End();
private byte[] FillForm(string certType, string certName, string certNum, string certDate)
{
string pdfTemplate = string.Format(@"\filePath{0}.pdf", certType);
PdfReader pdfReader = new PdfReader(pdfTemplate);
MemoryStream stream = new MemoryStream();
PdfStamper pdfStamper = new PdfStamper(pdfReader, stream);
AcroFields pdfFormFields = pdfStamper.AcroFields;
// set form pdfFormFields
pdfFormFields.SetField("CertName", certName);
pdfFormFields.SetField("CertNum", certNum);
pdfFormFields.SetField("CertDate", certDate);
// flatten the form to remove editting options, set it to false
// to leave the form open to subsequent manual edits
pdfStamper.FormFlattening = false;
// close the pdf
pdfStamper.Close();
stream.Flush();
stream.Close();
byte[] pdfByte = stream.ToArray();
return pdfByte;
}
设置字段值后,添加下面的行似乎已修复:
pdfFormFields.GenerateAppearances = true;