I used QrEncoder (NuGet Package QrCode.Net) for generating QR Code in MVC 4. Now my question is how can I show this QR code in my RDLC Report dynamically. I searched through many websites but didn't got any feasible Solution.
One way would be to:
Create a handler in .net to dynamically generate the QR code based on querystring parameters and return it as a png.
setup the rdlc to have an image that is externally referenced.
when generating the report you will need to set it to allow external references
pass the url to the handler/image in the dataset being sent to the report and have that be the path for the image in the report.
When the report is generated it will then generate and show the QR code.
var data = db.spMemberDetailByMembership(CompanyId, BranchId, Convert.ToInt32(MemRegId)).Select(x => new SPMemberRegisterModel
{
ID = x.ID,
BookingPrice = x.BookingPrice,
MailingAddress = MailingAddress(x.ID),
BarCode = GenerateQrCode(x.UUID),
}).ToList();
reportdatasource.Value = data;
localReport.DataSources.Add(reportdatasource);
private byte[] GenerateQrCode(string qrmsg)
{
QRCoder.QRCodeGenerator qRCodeGenerator = new QRCoder.QRCodeGenerator();
QRCoder.QRCodeData qRCodeData = qRCodeGenerator.CreateQrCode(qrmsg, QRCoder.QRCodeGenerator.ECCLevel.Q);
QRCoder.QRCode qRCode = new QRCoder.QRCode(qRCodeData);
Bitmap bmp = qRCode.GetGraphic(5);
System.Web.UI.WebControls.Image imgBarCode = new System.Web.UI.WebControls.Image();
imgBarCode.Height = 150;
imgBarCode.Width = 150;
using (Bitmap bitMap = qRCode.GetGraphic(5))
{
using (MemoryStream ms = new MemoryStream())
{
bitMap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
byte[] byteImage = ms.ToArray();
return byteImage;
}
}
}
Related
I have a template DOCX file that I am working with. The template file contains two placeholders for images (a logo and a barcode image). How can I replace these images using BufferedImage or just getting an image from a URL? There seem to not be many resources on this.
I finally got it to work using bookmarks. Apparently I didn't dig deeper before posting the question. The code is below. Although I did not find the methods to control the width and height of the image, which is important, the code below does answer my question.
public void addLogoAndBarCode(WordprocessingMLPackage pack, String agencyID)
{
MainDocumentPart documentPart = pack.getMainDocumentPart();
Document wmlDoc = (Document) documentPart.getJaxbElement();
Body body = wmlDoc.getBody();
List<Object> paragraphs = body.getContent();
RangeFinder rt = new RangeFinder("CTBookmark", "CTMarkupRange");
new TraversalUtil(paragraphs, rt);
for(CTBookmark bm:rt.getStarts())
{
if(bm.getName().equals("agencyLogo"))
{
logger.info("i found bookmark");
try
{
InputStream is = new FileInputStream(agencyLogoPath+agencyID+".jpg");
byte[] bytes = IOUtils.toByteArray(is);
BinaryPartAbstractImage imagePart = BinaryPartAbstractImage.createImagePart(pack, bytes);
Inline inline = imagePart.createImageInline(null, null, 0,1, false, 800);
P p = (P)(bm.getParent());
ObjectFactory factory = new ObjectFactory();
R run = factory.createR();
Drawing drawing = factory.createDrawing();
drawing.getAnchorOrInline().add(inline);
run.getContent().add(drawing);
p.getContent().add(run);
}
catch(Exception er)
{
er.printStackTrace();
}
}
}
}
I have an existing library that I can use to receive a docx file and return it. The software is .Net Core hosted in a Linux Docker container.
It's very limited in scope though and I need to perform some actions it can't do. As these are straightforward I thought I would use OpenXML, and for my proof of concept all I need to do is to read a docx as a memorystream, replace some text, turn it back into a memorystream and return it.
However the docx that gets returned is unreadable. I've commented out the text replacement below to eliminate that, and if I comment out the call to the method below then the docx can be read so I'm sure the issue is in this method.
Presumably I'm doing something fundamentally wrong here but after a few hours googling and playing around with the code I am not sure how to correct this; any ideas what I have wrong?
Thanks for the help
private MemoryStream SearchAndReplace(MemoryStream mem)
{
mem.Position = 0;
using (WordprocessingDocument wordDoc = WordprocessingDocument.Open(mem, true))
{
string docText = null;
StreamReader sr = new StreamReader(wordDoc.MainDocumentPart.GetStream());
docText = sr.ReadToEnd();
//Regex regexText = new Regex("Hello world!");
//docText = regexText.Replace(docText, "Hi Everyone!");
MemoryStream newMem = new MemoryStream();
newMem.Position = 0;
StreamWriter sw = new StreamWriter(newMem);
sw.Write(docText);
return newMem;
}
}
If your real requirement is to search and replace text in a WordprocessingDocument, you should have a look at this answer.
The following unit test shows how you can make your approach work if the use case really demands that you read a string from a part, "massage" the string, and write the changed string back to the part. It also shows one of the shortcomings of any other approach than the one described in the answer already mentioned above, e.g., by demonstrating that the string "Hello world!" will not be found in this way if it is split across w:r elements.
[Fact]
public void CanSearchAndReplaceStringInOpenXmlPartAlthoughThisIsNotTheWayToSearchAndReplaceText()
{
// Arrange.
using var docxStream = new MemoryStream();
using (var wordDocument = WordprocessingDocument.Create(docxStream, WordprocessingDocumentType.Document))
{
MainDocumentPart part = wordDocument.AddMainDocumentPart();
var p1 = new Paragraph(
new Run(
new Text("Hello world!")));
var p2 = new Paragraph(
new Run(
new Text("Hello ") { Space = SpaceProcessingModeValues.Preserve }),
new Run(
new Text("world!")));
part.Document = new Document(new Body(p1, p2));
Assert.Equal("Hello world!", p1.InnerText);
Assert.Equal("Hello world!", p2.InnerText);
}
// Act.
SearchAndReplace(docxStream);
// Assert.
using (WordprocessingDocument wordDocument = WordprocessingDocument.Open(docxStream, false))
{
MainDocumentPart part = wordDocument.MainDocumentPart;
Paragraph p1 = part.Document.Descendants<Paragraph>().First();
Paragraph p2 = part.Document.Descendants<Paragraph>().Last();
Assert.Equal("Hi Everyone!", p1.InnerText);
Assert.Equal("Hello world!", p2.InnerText);
}
}
private static void SearchAndReplace(MemoryStream docxStream)
{
using (WordprocessingDocument wordDocument = WordprocessingDocument.Open(docxStream, true))
{
// If you wanted to read the part's contents as text, this is how you
// would do it.
string partText = ReadPartText(wordDocument.MainDocumentPart);
// Note that this is not the way in which you should search and replace
// text in Open XML documents. The text might be split across multiple
// w:r elements, so you would not find the text in that case.
var regex = new Regex("Hello world!");
partText = regex.Replace(partText, "Hi Everyone!");
// If you wanted to write changed text back to the part, this is how
// you would do it.
WritePartText(wordDocument.MainDocumentPart, partText);
}
docxStream.Seek(0, SeekOrigin.Begin);
}
private static string ReadPartText(OpenXmlPart part)
{
using Stream partStream = part.GetStream(FileMode.OpenOrCreate, FileAccess.Read);
using var sr = new StreamReader(partStream);
return sr.ReadToEnd();
}
private static void WritePartText(OpenXmlPart part, string text)
{
using Stream partStream = part.GetStream(FileMode.Create, FileAccess.Write);
using var sw = new StreamWriter(partStream);
sw.Write(text);
}
I am trying to figure out if its possible to convert PDF document into a series of images.
Currently looking to migrate from ASP.NET 4.6 to ASP.CORE and this is so far the roadbloack to it.
I cannot seem to find any working examples for ASP Core of this currently.
Appreciate any help i can get.
You can use Docnet,
Here is an example code from project:
private static byte[] GetModifiedImage(IPageReader pageReader)
{
var rawBytes = pageReader.GetImage();
var width = pageReader.GetPageWidth();
var height = pageReader.GetPageHeight();
var characters = pageReader.GetCharacters();
using (var bmp = new Bitmap(width, height, PixelFormat.Format32bppArgb))
{
bmp.AddBytes(rawBytes);
bmp.DrawRectangles(characters);
using (var stream = new MemoryStream())
{
bmp.Save(stream, ImageFormat.Png);
return stream.ToArray();
}
}
}
Hope it helps
Cheers
I am getting a pdf-document (no password) which is generated from a third party software with javascript and a few editable fields in it. If I load this pdf-document with the pdfReader class the NumberOfPagesProperty is always 1 although the pdf-document has 17 pages. Oddly enough the document has 17 pages if I save the stream afterwards. When I now try to open the document the Acrobat Reader shows an extended feature warning and the fields are not fillable anymore (I haven't flattened the document). Do anyone know about such a problem?
Background Info:
My job is to remove the javascript code, fill out some fields and save the document afterwards.
I am using the iTextsharp version 5.5.3.0.
Unfortunately I can't upload a sample file because there are some confidental data in it.
private byte[] GetDocumentData(string documentName)
{
var document = String.Format("{0}{1}\\{2}.pdf", _component.OutputDirectory, _component.OutputFileName.Replace(".xml", ".pdf"), documentName);
if (File.Exists(document))
{
PdfReader.unethicalreading = true;
using (var originalData = new MemoryStream(File.ReadAllBytes(document)))
{
using (var updatedData = new MemoryStream())
{
var pdfTool = new PdfInserter(originalData, updatedData) {FormFlattening = false};
pdfTool.RemoveJavascript();
pdfTool.Save();
return updatedData.ToArray();
}
}
}
return null;
}
//Old version that wasn't working
public PdfInserter(Stream pdfInputStream, Stream pdfOutputStream)
{
_pdfInputStream = pdfInputStream;
_pdfOutputStream = pdfOutputStream;
_pdfReader = new PdfReader(_pdfInputStream);
_pdfStamper = new PdfStamper(_pdfReader, _pdfOutputStream);
}
//Solution
public PdfInserter(Stream pdfInputStream, Stream pdfOutputStream, char pdfVersion = '\0', bool append = true)
{
_pdfInputStream = pdfInputStream;
_pdfOutputStream = pdfOutputStream;
_pdfReader = new PdfReader(_pdfInputStream);
_pdfStamper = new PdfStamper(_pdfReader, _pdfOutputStream, pdfVersion, append);
}
public void RemoveJavascript()
{
for (int i = 0; i <= _pdfReader.XrefSize; i++)
{
PdfDictionary dictionary = _pdfReader.GetPdfObject(i) as PdfDictionary;
if (dictionary != null)
{
dictionary.Remove(PdfName.AA);
dictionary.Remove(PdfName.JS);
dictionary.Remove(PdfName.JAVASCRIPT);
}
}
}
The extended feature warning is a hint that the original PDF had been signed using a usage rights signature to "Reader-enable" it, i.e. to tell the Adobe Reader to activate some additional features when opening it, and the OP's operation on it has invalidated the signature.
Indeed, he operated using
_pdfStamper = new PdfStamper(_pdfReader, _pdfOutputStream);
which creates a PdfStamper which completely re-generates the document. To not invalidate the signature, though, one has to use append mode as in the OP's fixed code (for char pdfVersion = '\0', bool append = true):
_pdfStamper = new PdfStamper(_pdfReader, _pdfOutputStream, pdfVersion, append);
If I load this pdf-document with the pdfReader class the NumberOfPagesProperty is always 1 although the pdf-document has 17 pages. Oddly enough the document has 17 pages
Quite likely it is a PDF with a XFA form, i.e. the PDF is only a carrier of some XFA data from which Adobe Reader builds those 17 pages. The actual PDF in that case usually only contains one page saying something like "if you see this, your viewer does not support XFA."
For a final verdict, though, one has to inspect the PDF.
I am working on pdf generation, it is successfully implemented using itextsharp.dll. It’s working fine on local environment after publish also. We have our own server at other site
But same code doesn't work on the server,pdf is not generated instead it gives an error: 'The document has no pages.'
Initially I thought it is due to no data in document but it works locally with or without data in the document.
I had code implemented as follows to make a web request Is any problem in that ??
try
{
var myHttpWebRequest = (HttpWebRequest)WebRequest.Create(strPdfData + "?objpatId=" + patID);
var response = myHttpWebRequest.GetResponse();
myHttpWebRequest.Timeout = 900000;
var stream = response.GetResponseStream();
StreamReader sr = new StreamReader(stream);
content = sr.ReadToEnd();
}
create a method in the controller:
[HttpGet]
public JsonResult GetFile()
{
var json = new WebClient().DownloadFile(string address, string fileName);
//This code is just to convert the file to json you can keep it in file format and send to the view
dynamic result = Newtonsoft.Json.JsonConvert.DeserializeObject(json);
var oc = Newtonsoft.Json.JsonConvert.DeserializeObject<countdata[]>(Convert.ToString(result.countdata));
return Json(oc, JsonRequestBehavior.AllowGet);
}
In the view just call this function:
#Url.Action('genPDF','GetFile');