We Keep Coding

How to solve Excel opening Error Generated by EPPlus .Net library

I am generating several excel copies from a template (its really big).
For that First I am taking the template from a file location, then based on a loop for every iteration I am creating a new ExcelPackage(newFile,Template).
After that I am taking the exact ExcelWorksheet that I have to edit.
Then after editing I am Saving as the file as newFile. The time of opening the saved file Two problem is occurring:
If there is no Excel instance is running on the PC then the saved file is opening but with no data.
If the Excel instance is running then the saved file is opening with Warning message but working. "Problem with some content with Excel. Do you want us to recover?" and "Excel was able to recover some unreadable content "
string templateExcel = #"Location\template.xlsx";
FileInfo templateFile = new FileInfo(#"Location\newFile.xlsx");
using (FileStream templateExcelStream = File.OpenRead(templateExcel))
{
using (ExcelPackage copyExcel = new ExcelPackage(templateExcelStream))
{
ExcelWorksheet presentWorkSheet = copyExcel.Workbook.Worksheets["Name"];
presentWorkSheet.Cells[4, 2].Value = Value from condition;
copyExcel.SaveAs(templateFile);
}
}

Thanks all of you for your valuable time. I got the solution.
For me the issue was in the template itself as it contained invalid references to lookup tables. I found this in Formula -> Name Manager.
I suggest that you check the template if you face this issue.

EPPlus edited XLSM files show Error in Excel

I use the EPPlus library to batch edit some existing XLSM files. Inside the files I replace a line of VBA code and that's it. Everything works nice, if I edit the same line in the Excel code editor by hand.
When I open some of the files with Excel 2013 (15.0.4989.1000), the following error message is shown.
We found a problem with some content in 'test.xlsm'. Do you want us to
recover as much as we can? If you trust the source of this workbook,
click Yes.
If I click yes, the repair report shows the following entry. But the message is somewhat too generic to help me further.
Removed Records: Named range from /xl/workbook.xml-Part (Arbeitsmappe)
This is my C# code, which edits the XLSM file. Can I update my code or do I have to update the XLSM-file before editing it?
static void PatchVba(string filePath, string oldCode, string newCode)
{
var wbFileInfo = new FileInfo(filePath);
using (var package = new ExcelPackage(wbFileInfo, false))
{
foreach (var m in package.Workbook.VbaProject.Modules)
{
if (m.Code.Contains(oldCode))
{
m.Code = m.Code.Replace(oldCode, newCode);
Console.WriteLine("VBA Patched in \"{0}\"", filePath);
}
}
try
{
package.SaveAs(wbFileInfo);
}
catch
{
Console.WriteLine("Could not save patched file \"{0}\".", filePath);
}
}
}

I found out what the problem is. In the edited XLSM-file, a range name is used multiple times with overlapping scope. I was too focused on my C# code to find the root cause.
So removing the named ranges solves the issue. But it would still be interesting to know, why I can edit it without problems using Excel, but not by using EPPlus.

how can we convert word to .pdf format and excel to .pdf format from c#

How can we convert the excel file and word file to .pdf format from c#. i tried the following code but it shows the an error
this is my code:
Microsoft.Office.Interop.Word.Application appWord = new Microsoft.Office.Interop.Word.Application();
wordDocument = appWord.Documents.Open(#"C:\Users\ITPro2\Documents\test.docx");
wordDocument.ExportAsFixedFormat(#"D:\desktop\DocTo.pdf", Microsoft.Office.Interop.Word.WdExportFormat.wdExportFormatPDF);
and i got the following Error
The export failed because this feature is not installed. during export to pdf from word from c#

While not directly related the documentation under
https://msdn.microsoft.com/en-us/library/office/ff198122.aspx
gives a note, that if the pdf add-in is not installed, exactly this error will occur. So check your prerequisites, i.e. Office installed and the add-in, too.

1) Excel 2013 Primary Interop Assembly Class Library and it works perfectly fine under .NET 4.5.1 Just add Microsoft.Office.Interop.Excel assembly to your references and you are ready to go.
using System;
using Microsoft.Office.Interop.Excel;
namespace officeInterop
{
class Program
{
static void Main(string[] args)
{
Application app = new Application();
Workbook wkb = app.Workbooks.Open("d:\\x.xlsx");
wkb.ExportAsFixedFormat(XlFixedFormatType.xlTypePDF, "d:\\x.pdf");
}
}
}
OR
2) refer this link to convert DOC or DOCx file into PDF
http://www.rasteredge.com/how-to/csharp-imaging/pdf-convert-word-to-pdf/

Since my other comment got deleted, here is the updated version.
For converting my files to pdf in c# i used the metamorphosis libary, this could also be a solution for you.
Below is a code example from me where i used a blobstorage to download PDF files from regular files.
var converter = new SautinSoft.PdfMetamorphosis();
var ms = new MemoryStream();
await blob.DownloadToStreamAsync(ms);
ms.Seek(0, SeekOrigin.Begin);
var pdfStream = converter.DocxToPdfConvertStream(ms);
if (pdfStream != null)
{
await _storageProvider.SaveFileAsync(containerName, fileName, pdfStream);
}
ms.Close();
var result = await _storageProvider.GetFileWithAttributesAsync(containerName, fileName);
return new ServiceResponse<CloudBlockBlob>(result);
Below i posted some links with the sample code from the library itself:
Word to PDF example
Excel to PDF example

Creating report with Aspose.Word without losing formatting

I am using Aspose.Words to create reports from a template file (.docx filetype).
After using Aspose.Words to modify the template file and saving it into a new file, the formatting of the template file were lost (such as bold text, comments, etc).
I have tried:
Aspose.Words.Document doc = new Document(inputStream);
var outputStream = new MemoryStream();
doc.Save(outputStream, SaveFormat.docx);
What I did not expect is that outputStream is much less bytes than inputStream although I have yet to make any modification on doc. It may the reason why the report file lose their formatting.
What should I try now?

Ok, the problem is because the current version of Aspose.Words I'm using does not support docx filetype. But it still can read text of a .docx file, and only text(without any associated formatting).

Write an Excel file with C# [duplicate]

Is there any easy to implement library that can be used to read excel files and may be create them later on?
is this my best bet?
http://support.microsoft.com/kb/302084

Try this: http://epplus.codeplex.com
EPPlus is a .net library that reads and writes Excel 2007/2010 files
using the Open Office Xml format (xlsx).

If you are willing to commit yourself to a later version of Excel (2007+) you can also take a look at the OpenXML SDK. It's free, doesn't tie you to having MS Office installed on the machine it will be running on and there are quite a few resources available on how to use it online (including blogs from the OpenXML team).

There is excel package plus:
http://epplus.codeplex.com/
Only works on xlsx though, but Office 2003 is cycling out anyway.

You can use ExcelLibrary ,Although it works for .xls only which is 2003 format
The aim of this project is provide a native .NET solution to create, read and modify Excel files without using COM interop or OLEDB connection.
I had a chance of using EPPLUS ,it was wonderful :) ,It works for new excel format .xlsx which is used in 2007/2010
EPPlus is a .net library , you can read and write to excel files ,create charts ,pictures ,shapes... and Much more
Also take a look at this SO post

I've used oledb, interop and just started using Epplus. So far epplus is proving to be simplest.
http://epplus.codeplex.com/
However, I just posted a problem I have with epplus, but I posted some code you could use as reference.
c# epplus error Removed Part: Drawing shape

I like to use ExcelDataReader for reading and the aforementioned EPPlus for writing. Here's an example.
Here's an example of reading with it:
FileStream stream = File.Open(filePath, FileMode.Open, FileAccess.Read);
// Reading from a binary Excel file ('97-2003 format; *.xls)
// IExcelDataReader excelReader = ExcelReaderFactory.CreateBinaryReader(stream);
// Reading from a OpenXml Excel file (2007 format; *.xlsx)
IExcelDataReader excelReader = ExcelReaderFactory.CreateOpenXmlReader(stream);
// DataSet - The result of each spreadsheet will be created in the result.Tables
DataSet result = excelReader.AsDataSet();
// Free resources (IExcelDataReader is IDisposable)
excelReader.Close();
var cdm = new ValueSetRepository();
for (int i = 0; i < result.Tables.Count; i++)
{
// CHECK if tableNames filtering is specified
if (tableNames != null)
{
// CHECK if a table matches the specified tablenames
var tablename = result.Tables[i].TableName;
if (!tableNames.Contains(tablename))
{
continue;
}
}
var lookup = new ValueSetLookup();
lookup.CmsId = result.Tables[i].Rows[2][0].ToString();
lookup.NqfNumber = result.Tables[i].Rows[2][1].ToString();
lookup.Data = new List<ValueSetAttribute>();
int row_no = 2;
while (row_no < result.Tables[i].Rows.Count) // i is the index of table
// (sheet name) which you want to convert to csv
{
var currRow = result.Tables[i].Rows[row_no];
var valueSetAttribute = new ValueSetAttribute()
{
Id = currRow[0].ToString(),
Number = currRow[1].ToString(),
tName = currRow[2].ToString(),
Code = currRow[7].ToString(),
Description = currRow[8].ToString(),
};
lookup.Data.Add(valueSetAttribute);
row_no++;
}
cdm.AddRecord(lookup);

A company I used to work for did a lot of research on this and decided a product by SoftArtisans was their best bet:
OfficeWriter
I always found it strange how weak the support for Excel reading and writing was. I'm pretty sure that if you use Microsoft's libraries you have to have Excel installed anyway which is an extra expense just like OfficeWriter.

You could either go for VBA or use the free library from FileHelpers. If you are planning to buy some commerical solutions, I would recommend ASPOSE

According to this website you need to include a reference to the Microsoft Excel 12.0 Object library. From there, you need to do a few things to open up the file. There's a code sample on the website.
PS - Sorry it's not too detailed but I couldn't find the Microsoft Office developer reference with more details.

I used ExcelLibrary with very great results! (until now it support Excel 2003 or lower versions).
http://code.google.com/p/excellibrary/

Yes, multiple open-source libraries exist to help read and/or write Excel spreadsheets using C#.
Here is a shortlist of C# libraries:
Microsoft.Office.Interop.Excel
ExcelDataReader
NPOI
ExcelMapper - NPOI extension
EPPlus
An up-to-date curated list is maintained here.
Example: Reading Excel File using ExcelMapper
a. Install using NuGet, by running below command in NuGet Packet Manager:
Install-Package ExcelMapper
b. Sample C# Code for ExcelMapper
public void ReadExcelUsingExcelMapperExtension()
{
string filePath = #"C:\Temp\ListOfPeople.xlsx";
var people = new ExcelMapper(filePath).Fetch<Person>().ToList();
}
public class Person
{
public string FirstName { get; set; }
public string LastName { get; set; }
public int Age { get; set; }
}
Disclaimer: I like the conciseness of ExcelMapper, therefore included sample code for this package. To do the same using other libraries, requires a lot more code.