嗨,我的应用是 MVC3 c#,我正在使用 itextsharp 为预定义表单生成 PDF 文件。在这个应用程序中,我必须使用不同的形式。要生成我使用的表单:
public ActionResult TestPDF(long learnerID = 211, long courseID = 11)
{
var caseList = _studyCaseSvc.ListStudyCases().Where(x => x.Course_ID == courseID);
try
{
MemoryStream memoryStream = new MemoryStream();
PdfConcatenate whole = new PdfConcatenate(memoryStream);
foreach (var ca in caseList)
{
byte[] part = null;
if (ca.CaseType == "CTA")
{
part = GenerateEvaluationCAT_PDF(learnerID, ca.ID);
}
else if (ca.CaseType == "CTAH")
{
part = GenerateEvaluationCATH_PDF(learnerID, ca.ID);
}
else
{
part = null;
}
if (part != null)
{
PdfReader partReader = new PdfReader(part);
whole.AddPages(partReader);
partReader.Close();
}
}
whole.Close();
byte[] byteInfo = memoryStream.ToArray();
SendPdfToBrowser(byteInfo);
}
catch (Exception ex)
{
}
return null;
}
我收到此错误:已添加具有相同密钥的项目。错误发生在 AddPages。所以我开发了这个更简单的测试:
private void merge()
{
try
{
FileStream output = new FileStream("p3.pdf", FileMode.Create);
PdfConcatenate pdfConcatenate = new PdfConcatenate(output, true);
PdfReader r1 = new PdfReader("p2.pdf");
MemoryStream memoryStream = new MemoryStream();
PdfStamper pdfStamper = new PdfStamper(r1, memoryStream);
pdfStamper.FormFlattening = true;
pdfStamper.Close();
PdfReader r2 = new PdfReader(memoryStream.ToArray());
//pdfConcatenate.AddPages(tempReader);
pdfConcatenate.Open();
int n = r1.NumberOfPages;
for (int i = 1; i <= n; i++)
{
PdfImportedPage imp = pdfConcatenate.Writer.GetImportedPage(r1, i);
pdfConcatenate.Writer.AddPage(imp);
}
pdfConcatenate.Writer.FreeReader(r1);
pdfStamper.Close();
r1.Close();
pdfConcatenate.Close();
}
catch (Exception ex)
{
}
}
同样的错误。