Question

I’ve gone looking online for this solution and can’t find anything that explains my problem.

I am using EPPLus for vb.net (using OfficeOpenXml) and my code looks something like this:

Dim Package As New ExcelPackage
Dim wks As ExcelWorksheet
Dim dt As DataTable

wks.Cells("A1").LoadFromDataTable(dt, True, TableStyles.Medium9)

Dim SaveAs As New FileInfo([...somelocation.xlsx])
Package.SaveAs(SaveAs)

Now, when I run this, it works perfectly well and saves the .xlsx file as wanted / expected. HOWEVER, when I try and open it in Excel, I get an error saying:
“Excel found unreadable content in… Do you want to recover the contents of this workbook?”

If I then click “Yes”, It opens it perfectly fine and gives me an error report saying:
“Excel was able to open the file by repairing or removing the unreadable content”
with lots of erros (one for each datatable loaded):
“Repaired Records: Table from /xl/tables/table1.xml part (Table)”

NOW… If I change the line of code from:

wks.Cells("A1").LoadFromDataTable(dt, True, TableStyles.Medium9)

To:

wks.Cells("A1").LoadFromDataTable(dt, True)

Then everything work perfectly well with no errors…

What am I doing wrong?

Answer 1

… So I figured out what MY problem was and I’m just putting it in here in case anyone is as stupid as I was…

In my case, I created the Datatable with custom columns names that were split up over 2 lines as follows:

dt.Columns.Add("First Line's Text" & vbCrLf & "Second Line")

The problem was the vbCrLf – I changed it to:

dt.Columns.Add("First Line's Text" & vbLf & "Second Line")

And the error went away 🙂

Hope this saves someone else all the annoyance I went through!!