I'm trying to dynamically create a PowerPoint presentation. One slide has a bunch of placeholder images that need to be changed based on certain values.
My approach is to create a new ImagePart and link it to the according Blip. The image is downloaded and stored to the presentation just fine. The problem is, that there is no relationship created in slide.xml.rels file for the image, which leads to an warning about missing images and empty boxes on the slide.
Any ideas what I am doing wrong?
Thanks in advance for your help! Best wishes
SPSecurity.RunWithElevatedPrivileges(delegate()
{
using (SPSite siteCollection = new SPSite(SPContext.Current.Site.RootWeb.Url))
{
using (SPWeb oWeb = siteCollection.OpenWeb())
{
SPList pictureLibrary = oWeb.Lists[pictureLibraryName];
SPFile imgFile = pictureLibrary.RootFolder.Files[imgPath];
byte[] byteArray = imgFile.OpenBinary();
int pos = Convert.ToInt32(name.Replace("QQ", "").Replace("Image", ""));
foreach (DocumentFormat.OpenXml.Presentation.Picture pic in pictureList)
{
var oldimg = pic.BlipFill.Blip.Embed.ToString(); ImagePart ip = (ImagePart)slidePart.AddImagePart(ImagePartType.Png, oldimg+pos);
using (var writer = new BinaryWriter(ip.GetStream()))
{
writer.Write(byteArray);
}
string newId = slidePart.GetIdOfPart(ip);
setDebugMessage("new img id: " + newId);
pic.BlipFill.Blip.Embed = newId;
}
slidePart.Slide.Save();
}
}
});
So, for everyone who's experiencing a similar problem, I finally found the solution. Quite a stupid mistake. Instad of PresentationDocument document = PresentationDocument.Open(mstream, true); you have to use
using (PresentationDocument document = PresentationDocument.Open(mstream, true))
{
do your editing here
}
This answer brought me on the right way.
Related
I have a full.docx which includes two math questions, the docx embeds some pictures and MathType equation (oleobject), I split the doc according to this, get two files (first.docx, second.docx) , first.docx works fine, the second.docx, however, pops up a warning dialog when I try to open it:
"Word found unreadable content in second.docx. Do you want to recover the contents of this document? If you trust the source of this document, click Yes."
After click "Yes", the doc can be opened, the content is also correct, I want to know what is wrong with the second.docx? I have checked it with "Open xml sdk 2.5 productivity tool", but found no reason. Very appreciated for any help. Thanks.
The three files have been uploaded to here.
Show some code:
byte[] templateBytes = System.IO.File.ReadAllBytes(TEMPLATE_YANG_FILE);
using (MemoryStream templateStream = new MemoryStream())
{
templateStream.Write(templateBytes, 0, (int)templateBytes.Length);
string guidStr = Guid.NewGuid().ToString();
using (WordprocessingDocument document = WordprocessingDocument.Open(templateStream, true))
{
document.ChangeDocumentType(DocumentFormat.OpenXml.WordprocessingDocumentType.Document);
MainDocumentPart mainPart = document.MainDocumentPart;
mainPart.Document = new Document();
Body bd = new Body();
foreach (DocumentFormat.OpenXml.Wordprocessing.Paragraph clonedParagrph in lst)
{
bd.AppendChild<DocumentFormat.OpenXml.Wordprocessing.Paragraph>(clonedParagrph);
clonedParagrph.Descendants<Blip>().ToList().ForEach(blip =>
{
var newRelation = document.CopyImage(blip.Embed, this.wordDocument);
blip.Embed = newRelation;
});
clonedParagrph.Descendants<DocumentFormat.OpenXml.Vml.ImageData>().ToList().ForEach(imageData =>
{
var newRelation = document.CopyImage(imageData.RelationshipId, this.wordDocument);
imageData.RelationshipId = newRelation;
});
}
mainPart.Document.Body = bd;
mainPart.Document.Save();
}
string subDocFile = System.IO.Path.Combine(this.outDir, guidStr + ".docx");
this.subWordFileLst.Add(subDocFile);
File.WriteAllBytes(subDocFile, templateStream.ToArray());
}
the lst contains Paragraph cloned from original docx using:
(DocumentFormat.OpenXml.Wordprocessing.Paragraph)p.Clone();
Using productivity tool, found oleobjectx.bin not copied, so I add below code after copy Blip and ImageData:
clonedParagrph.Descendants<OleObject>().ToList().ForEach(ole =>
{
var newRelation = document.CopyOleObject(ole.Id, this.wordDocument);
ole.Id = newRelation;
});
Solved the issue.
I have written a piece of code to create a word document by mail merge using Syncfusion (Assembly Syncfusion.DocIO.Portable, Version=17.1200.0.50,), Angular 7+ and .NET Core. Please see the code below.
private MemoryStream MergePaymentPlanInstalmentsScheduleToPdf(List<PaymentPlanInstalmentReportModel>
PaymentPlanDetails, byte[] templateFileBytes)
{
if (templateFileBytes == null || templateFileBytes.Length == 0)
{
return null;
}
var templateStream = new MemoryStream(templateFileBytes);
var pdfStream = new MemoryStream();
WordDocument mergeDocument = null;
using (mergeDocument = new WordDocument(templateStream, FormatType.Docx))
{
if (mergeDocument != null)
{
var mergeList = new List<PaymentPlanInstalmentScheduleMailMergeModel>();
var obj = new PaymentPlanInstalmentScheduleMailMergeModel();
obj.Applicants = 0;
if (PaymentPlanDetails != null && PaymentPlanDetails.Any()) {
var applicantCount = PaymentPlanDetails.GroupBy(a => a.StudentID)
.Select(s => new
{
StudentID = s.Key,
Count = s.Select(a => a.StudentID).Distinct().Count()
});
obj.Applicants = applicantCount?.Count() > 0 ? applicantCount.Count() : 0;
}
mergeList.Add(obj);
var reportDataSource = new MailMergeDataTable("Report", mergeList);
var tableDataSource = new MailMergeDataTable("PaymentPlanDetails", PaymentPlanDetails);
List<DictionaryEntry> commands = new List<DictionaryEntry>();
commands.Add(new DictionaryEntry("Report", ""));
commands.Add(new DictionaryEntry("PaymentPlanDetails", ""));
MailMergeDataSet ds = new MailMergeDataSet();
ds.Add(reportDataSource);
ds.Add(tableDataSource);
mergeDocument.MailMerge.ExecuteNestedGroup(ds, commands);
mergeDocument.UpdateDocumentFields();
using (var converter = new DocIORenderer())
{
using (var pdfDocument = converter.ConvertToPDF(mergeDocument))
{
pdfDocument.Save(pdfStream);
pdfDocument.Close();
}
}
mergeDocument.Close();
}
}
return pdfStream;
}
Once the document is generated, I notice there is a blank page (with the footer) at the end. I searched for a solution on the internet over and over again, but I was not able to find a solution. According to experts, I have done the initial checks such as making sure that the initial word template file has no page breaks, etc.
I am wondering if there is something that I can do from my code to remove any extra page breaks or anything like that, which can cause this.
Any other suggested solution for this, even including MS Word document modifications also appreciated.
Please refer the below documentation link to remove empty page at the end of Word document using Syncfusion Word library (Essential DocIO).
https://www.syncfusion.com/kb/10724/how-to-remove-empty-page-at-end-of-word-document
Please reuse the code snippet before converting Word to PDF in your sample application.
Note: I work for Syncfusion.
I am trying to use the iText library with c# to capture the text portion of pdf files.
I created a pdf from excel 2013 (exported) and then copied the sample from the web of how to use itext (added the lib ref to the project).
It reads perfectly the first page but it gets garbled info after that. It is keeping part of the first page and merging the info with the next page. The commented lines is when I was trying to solve the problem, the string "thePage" is recreated inside the for loop.
Here is the code. I can email the pdf to whoever can help with this issue.
Thanks in advance
public static string ExtractTextFromPdf(string path)
{
ITextExtractionStrategy its = new iTextSharp.text.pdf.parser.LocationTextExtractionStrategy();
using (PdfReader reader = new PdfReader(path))
{
StringBuilder text = new StringBuilder();
//string[] theLines;
//theLines = new string[COLUMNS];
//string thePage;
for (int i = 1; i <= reader.NumberOfPages; i++)
{
string thePage = "";
thePage = PdfTextExtractor.GetTextFromPage(reader, i, its);
string [] theLines = thePage.Split('\n');
foreach (var theLine in theLines)
{
text.AppendLine(theLine);
}
// text.AppendLine(" ");
// Array.Clear(theLines, 0, theLines.Length);
// thePage = "";
}
return text.ToString();
}
}
A strategy object collects text data and does not know if a new page has started or not.
Thus, use a new strategy object for each page.
I want to export MS word(docx/doc) document pages to Image(jpeg/png).
I am doing same for presentation(pptx/ppt) using office interop export api for each slide, but didn't found corresponding API for word.
Need suggestion for API/alternate approach for achieving this.
Based on this similar question: "Saving a word document as an image" you could do something like this:
const string basePath = #"C:\Users\SomeUser\SomePath\";
var docPath = Path.Combine(basePath, "documentA.docx");
var app = new Application()
{
Visible = true
};
var doc = app.Documents.Open(docPath);
foreach (Window window in doc.Windows)
{
foreach (Pane pane in window.Panes)
{
for (var i = 1; i <= pane.Pages.Count; i++)
{
var page = pane.Pages[i];
var bits = page.EnhMetaFileBits;
var target = Path.Combine(basePath, string.Format("page-no-{0}", i));
using (var ms = new MemoryStream(bits))
{
var image = Image.FromStream(ms);
var pngTarget = Path.ChangeExtension(target, "png");
image.Save(pngTarget, ImageFormat.Png);
}
}
}
}
app.Quit();
Basically, I'm using the Page.EhmMetaFileBits property which, according to the documentation:
Returns a Object that represents a picture representation of how a
page of text appears.
... and based on that, I create an image and save it to the disk.
I have written
List<Attachment> lstAttachment = new List<Attachment>();
//Check if any error file is present in which case it needs to be send
if (new FileInfo(Path.Combine(errorFolder, errorFileName)).Exists)
{
Attachment unprocessedFile = new Attachment(Path.Combine(errorFolder, errorFileName));
lstAttachment.Add(unprocessedFile);
}
//Check if any processed file is present in which case it needs to be send
if (new FileInfo(Path.Combine(outputFolder, outputFileName)).Exists)
{
Attachment processedFile = new Attachment(Path.Combine(outputFolder, outputFileName));
lstAttachment.Add(processedFile);
}
Working fine and is giving the expected output.
Basically I am attaching the file to the list based on whether the file is present or not.
I am looking for any other elegant solution than the one I have written.
Reason: Want to learn differnt ways of representing the same program.
I am using C#3.0
Thanks.
Is it looks better?
...
var lstAttachment = new List<Attachment>();
string errorPath = Path.Combine(errorFolder, errorFileName);
string outputPath = Path.Combine(outputFolder, outputFileName);
AddAttachmentToCollection(lstAttachment, errorPath);
AddAttachmentToCollection(lstAttachment, outputPath);
...
public static void AddAttachmentToCollection(ICollection<Attachment> collection, string filePath)
{
if (File.Exists(filePath))
{
var attachment = new Attachment(filePath);
collection.Add(attachment);
}
}
How about a little LINQ?
var filenames = new List<string>()
{
Path.Combine(errorFolder, errorFilename),
Path.Combine(outputFolder, outputFilename)
};
var attachments = filenames.Where(f => File.Exists(f))
.Select(f => new Attachment(f));