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Merging uploaded images from mysql table into single pdf file in c#

I have uploaded documents (only image format) to mysql database through c#. This entry in the database table will have reference Id for each transaction. Upon clicking on download button, all uploaded images of respective table id should merge into a single pdf file. How can I Achieve this?. Require C# code to download
Below is the sample code which is not working. It returns system.byte[] as response
[HttpPost]
public static byte[] MergeFile()
{
PdfReader.unethicalreading = true;
using (iTextSharp.text.Document doc = new iTextSharp.text.Document())
{
doc.SetPageSize(PageSize.A4);
using (var ms = new MemoryStream())
{
// PdfWriter wri = PdfWriter.GetInstance(doc, ms);
using (PdfCopy pdf = new `enter code here`PdfCopy(doc, ms))
{
doc.Open();
using (MySqlConnection connection = new MySqlConnection(ConfigurationManager.ConnectionStrings[2].ConnectionString))
{
using (MyDBContext context = new MyDBContext(connection, false))
{
try
{
var getDocs = context.Document.Where(p => p.ReferenceId == 1).ToList();
foreach (DAL.Document info in getDocs)
{
try
{
doc.NewPage();
iTextSharp.text.Document imageDocument = null;
PdfWriter imageDocumentWriter = null;
switch (info.Extension.Trim('.').ToLower())
{
case "image/png":
using (imageDocument = new iTextSharp.text.Document())
{
using (var imageMS = new MemoryStream())
{
using (imageDocumentWriter = PdfWriter.GetInstance(imageDocument, imageMS))
{
imageDocument.Open();
if (imageDocument.NewPage())
{
var image = iTextSharp.text.Image.GetInstance(info.Documents);
image.Alignment = Element.ALIGN_CENTER;
image.ScaleToFit(doc.PageSize.Width - 10, doc.PageSize.Height - 10);
if (!imageDocument.Add(image))
{
throw new Exception("Unable to add image to page!");
}
imageDocument.Close();
imageDocumentWriter.Close();
using (PdfReader imageDocumentReader = new PdfReader(imageMS.ToArray()))
{
var page = pdf.GetImportedPage(imageDocumentReader, 1);
pdf.AddPage(page);
imageDocumentReader.Close();
}
}
}
}
}
break;
}
catch (Exception e)
{
e.Data["FileName"]=info.DocumentName;
throw e;
}
}
}
catch (Exception e)
{
var k = e.Message;
}
}
}
}
if (doc.IsOpen()) doc.Close();
return ms.ToArray();
}
}
}

Got a message " MEMORY STREAM IS NOT EXPANDABLE" after using WordprocessingDocument base on Microsoft site on MVC

Currently, I was base on "Search and replace text in a document part (Open XML SDK)" on the Microsoft site. I've realized that the code got an issue after the file has downloaded to my drive.
So I opened that file and got a message
MEMORY STREAM IS NOT EXPANDABLE at sw.Write(docText);
How to fix that?
In GenerateDocxHelper class:
private readonly MemoryStream _mem;
private Dictionary<string, string> _dicData;
public GenerateDocxHelper(string path)
{
_mem = new MemoryStream(System.IO.File.ReadAllBytes(path));
_dicData = new Dictionary<string, string>();
}
public MemoryStream ReplaceTextInWord()
{
using (WordprocessingDocument wordDoc = WordprocessingDocument.Open(_mem, true))
{
string docText = null;
using (StreamReader sr = new StreamReader(wordDoc.MainDocumentPart.GetStream()))
{
docText = sr.ReadToEnd();
}
foreach (var data in _dicData)
{
docText = docText.Replace(data.Key, data.Value);
}
using (StreamWriter sw = new StreamWriter(wordDoc.MainDocumentPart.GetStream(FileMode.Create)))
{
sw.Write(docText);
}
}
_mem.Seek(0, SeekOrigin.Begin);
return _mem;
}

You should create the MemoryStream with capacity = 0 which means it is resizeable,
and then add the bytes you have read from the file.
var allBytes = File.ReadAllBytes(path);
//this makes _mem resizeable
_mem = new MemoryStream(0);
_mem.Write(allBytes, 0, allBytes.Length);
Check this answer

iTextSharp Can not Convert All HTML to PDF

Using the sample codes from here I come up with these codes -
var my_html = this.GetmyReportHtml();
var my_css = this.GetmyReportHtmlCss();
Byte[] bytes;
using (var ms = new MemoryStream())
{
using (var doc = new iTextSharp.text.Document(PageSize.LETTER))
{
using (var writer = PdfWriter.GetInstance(doc, ms))
{
doc.Open();
try
{
using (var msCss = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(my_css)))
{
using (var msHtml = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(my_html)))
{
iTextSharp.tool.xml.XMLWorkerHelper.GetInstance().ParseXHtml(writer, doc, msHtml, msCss);
}
}
}
catch (Exception ex)
{
}
finally
{
doc.Close();
}
}
}
bytes = ms.ToArray();
}
System.IO.File.WriteAllBytes(#"c:\\temp\test.pdf", bytes);
PDF has been generated. However my_html has 6 pages in my case, only half of the content are converted to pdf.
Anyone knows what happened here? How to know if iTextSharp.tool.xml.XMLWorkerHelper.GetInstance().ParseXHtml works properly?
Thanks

Found out the problem. In this line of codes -
using (var doc = new iTextSharp.text.Document(PageSize.LETTER))
PageSize.LETTER can not be passed in.

itextsharp "the document has no pages" error when i have anchor tag

I am converting some html to pdf. It is working fine but when i have anchor tag in my html i get error the document has no pages
My code is
byte[] data;
using (var sr = new StringReader(sw.ToString()))
{
var st = new StyleSheet();
GetStyleSheetForUnicodeCharacters(st);
using (var ms = new MemoryStream())
{
using (var pdfDoc = new Document())
{
using (var w = PdfWriter.GetInstance(pdfDoc, ms))
{
pdfDoc.Open();
var parsedHtmlElements = HTMLWorker.ParseToList(sr, st);
foreach (var htmlElement in parsedHtmlElements)
{
pdfDoc.Add(htmlElement as IElement);
}
pdfDoc.Close();
data = ms.ToArray();
}
}
}
}

The problem may be invalid html. One way to check is to run your html source through a validator such W3C Markup Validation Service.

have you already tried to add a Page with:
pdfDoc.NewPage();
I think your Code should look like this:
byte[] data;
using (var sr = new StringReader(sw.ToString()))
{
var st = new StyleSheet();
GetStyleSheetForUnicodeCharacters(st);
using (var ms = new MemoryStream())
{
using (var pdfDoc = new Document())
{
using (var w = PdfWriter.GetInstance(pdfDoc, ms))
{
pdfDoc.Open();
pdfDoc.NewPage(); // add Page here
var parsedHtmlElements = HTMLWorker.ParseToList(sr, st);
foreach (var htmlElement in parsedHtmlElements)
{
pdfDoc.Add(htmlElement as IElement);
}
pdfDoc.Close();
data = ms.ToArray();
}
}
}
}
You can also add a blank Page by using:
pdfDoc.newPage();
w.setPageEmpty(false);
MfG chris

Need to check that any html tags are mismatched. Example /td>, this types of mistake raised above error.

Editing custom XML part in word document sometimes corrupts document

We have a system that stores some custom templating data in a Word document. Sometimes, updating this data causes Word to complain that the document is corrupted. When that happens, if I unzip the docx file and compare the contents to the previous version, the only difference appears to be the expected change in the customXML\item.xml file. If I re-zip the contents using 7zip, it seems to work OK (Word no longer complains that the document is corrupt).
The (simplified) code:
void CreateOrReplaceCustomXml(string filename, MyCustomData data)
{
using (var doc = WordProcessingDocument.Open(filename, true))
{
var part = GetCustomXmlParts(doc).SingleOrDefault();
if (part == null)
{
part = doc.MainDocumentPart.AddCustomXmlPart(CustomXmlPartType.CustomXml);
}
var serializer = new DataContractSerializer(typeof(MyCustomData));
using (var stream = new MemoryStream())
{
serializer.WriteObject(stream, data);
stream.Seek(0, SeekOrigin.Begin);
part.FeedData(stream);
}
}
}
IEnumerable<CustomXmlPart> GetCustomXmlParts(WordProcessingDocument doc)
{
return doc.MainDocumentPart.CustomXmlParts
.Where(part =>
{
using (var stream = doc.Package.GePart(c.Uri).GetStream())
using (var streamReader = new StreamReader(stream))
{
return streamReader.ReadToEnd().Contains("Some.Namespace");
}
});
}
Any suggestions?

Since re-zipping works, it seems the content is well-formed.
So it sounds like the zip process is at fault. So open the corrupted docx in 7-Zip, and take note of the values in the "method" column (especially for customXML\item.xml).
Compare that value to a working docx - is it the same or different? Method "Deflate" works.

I faced the same issue and it turned out it was due to encoding.
Do you already specify the same encoding when serializing/deserializing?

Couple of suggestion
a. Try doc.Package.Flush(); after you write the data back into the custom xml.
b. You may have to delete all custom part and add a new custom part. We are using the following code and it seems working fine.
public static void ReplaceCustomXML(WordprocessingDocument myDoc, string customXML)
{
MainDocumentPart mainPart = myDoc.MainDocumentPart;
mainPart.DeleteParts<CustomXmlPart>(mainPart.CustomXmlParts);
CustomXmlPart customXmlPart = mainPart.AddCustomXmlPart(CustomXmlPartType.CustomXml);
using (StreamWriter ts = new StreamWriter(customXmlPart.GetStream()))
{
ts.Write(customXML);
ts.Flush();
ts.Close();
}
}
public static MemoryStream GetCustomXmlPart(MainDocumentPart mainPart)
{
foreach (CustomXmlPart part in mainPart.CustomXmlParts)
{
using (XmlTextReader reader =
new XmlTextReader(part.GetStream(FileMode.Open, FileAccess.Read)))
{
reader.MoveToContent();
if (reader.Name.Equals("aaaa", StringComparison.OrdinalIgnoreCase))
{
string str = reader.ReadOuterXml();
byte[] byteArray = Encoding.ASCII.GetBytes(str);
MemoryStream stream = new MemoryStream(byteArray);
return stream;
}
}
}
return null; //result;
}
using (WordprocessingDocument myDoc = WordprocessingDocument.Open(ms, true))
{
StreamReader reader = new StreamReader(memStream);
string FullXML = reader.ReadToEnd();
ReplaceCustomXML(myDoc, FullXML);
myDoc.Package.Flush();
//Code to save file
}