EPPlus error reading file

Question

using code like

using OfficeOpenXml;  // namespace for the ExcelPackage assembly
…
FileInfo newFile = new FileInfo(@\"C:\\mynewfile.xlsx\"); 
using (ExcelPackag         


        

Answer 1

if your project is .net core edit your project file then add

<ItemGroup>
<PackageReference Include="System.Text.Encoding.CodePages" Version="4.3.0" />
</ItemGroup>

and in your startup.cs

add

System.Text.Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);

Answer 2

The problem is in the ZIP file reader (ZipInputStream). You need to add the encodings like windows-1252 manually:

1. dotnet add package System.Text.Encoding.CodePages

2. Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);

More info here: .NET Core doesn't know about Windows 1252, how to fix?