public async Task <IActionResult> saveTestToTemplate([FromBody] TestTemplateReq req)
{
MemoryStream pdfMemoryStream = templateService.saveDataToTemplate(req);
Response.Headers.Add("Content-Disposition", "attachment; filename=" + req.fileCode);
return(new FileStreamResult(pdfMemoryStream, "application/octet-stream"));//文件流方式，指定文件流对应的ContenType。
}
public MemoryStream saveDataToTemplate(TestTemplateReq allReq)
{
MemoryStream resultStream = new MemoryStream();
try
{
MemoryStream memoryStream = new MemoryStream();
PDFEntityConfig pDFEntity = CommonConstantsUtil.PDFCONFIG[allReq.fileCode];
string path = pDFEntity.filePath;
PdfReader reader = new PdfReader(path, null);
PdfReader.unethicalreading = true;
PdfStamper stamper = new PdfStamper(reader, memoryStream, '\0', false);
stamper.Writer.CloseStream = false;
AcroFields pdfFormFields = stamper.AcroFields;
pdfFormFields.SetField(allReq.fieldName, allReq.fieldValue);
stamper.FormFlattening = true;
stamper.Writer.CloseStream = false;
stamper.Close();
memoryStream.Position = 0;
reader.Close();
//You have to rewind the MemoryStream before copying
// memoryStream.Seek(0, SeekOrigin.Begin);
memoryStream.CopyTo(resultStream);
memoryStream.Close();
resultStream.Position = 0;
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
return(resultStream);
}